./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe004_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe004_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe004_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 21:32:52,466 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:32:52,538 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:32:52,544 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:32:52,545 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:32:52,579 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:32:52,579 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:32:52,579 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:32:52,580 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:32:52,580 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:32:52,580 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:32:52,581 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:32:52,581 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:32:52,582 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:32:52,582 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:32:52,582 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:32:52,583 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:32:52,583 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:32:52,583 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:32:52,584 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:32:52,584 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:32:52,586 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:32:52,586 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:32:52,587 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:32:52,587 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:32:52,587 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:32:52,587 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:32:52,588 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:32:52,588 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:32:52,588 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:32:52,589 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:32:52,590 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:32:52,590 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:32:52,590 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:32:52,590 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:32:52,590 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:32:52,591 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:32:52,592 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:32:52,592 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:32:52,592 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:32:52,592 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:32:52,593 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:32:52,593 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:32:52,593 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:32:52,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:32:52,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:32:52,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:32:52,869 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:32:52,871 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:32:52,872 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.i [2024-06-21 21:32:54,115 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:32:54,418 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:32:54,418 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.i [2024-06-21 21:32:54,434 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c89473e4b/e553197d2e6749e98d4e88f41554c2a3/FLAGd1c3d3a8c [2024-06-21 21:32:54,448 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c89473e4b/e553197d2e6749e98d4e88f41554c2a3 [2024-06-21 21:32:54,451 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:32:54,453 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:32:54,454 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe004_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-21 21:32:54,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:32:54,620 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:32:54,621 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:32:54,621 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:32:54,626 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:32:54,626 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:32:54" (1/2) ... [2024-06-21 21:32:54,627 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@168b55be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:32:54, skipping insertion in model container [2024-06-21 21:32:54,628 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:32:54" (1/2) ... [2024-06-21 21:32:54,629 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2e864e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:32:54, skipping insertion in model container [2024-06-21 21:32:54,629 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:32:54" (2/2) ... [2024-06-21 21:32:54,630 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@168b55be and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:32:54, skipping insertion in model container [2024-06-21 21:32:54,630 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:32:54" (2/2) ... [2024-06-21 21:32:54,630 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:32:54,719 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:32:54,721 INFO L97 edCorrectnessWitness]: Location invariant before [L824-L824] ((((((((((((((((! multithreaded || x$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2)) [2024-06-21 21:32:54,721 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ((((((((((((((((! multithreaded || x$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2)) [2024-06-21 21:32:54,721 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] ((((((((((((((((! multithreaded || x$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2)) [2024-06-21 21:32:54,721 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:32:54,722 INFO L106 edCorrectnessWitness]: ghost_update [L819-L819] multithreaded = 1; [2024-06-21 21:32:54,768 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:32:55,126 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:32:55,141 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:32:55,274 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:32:55,308 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:32:55,308 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:32:55 WrapperNode [2024-06-21 21:32:55,309 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:32:55,310 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:32:55,310 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:32:55,310 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:32:55,316 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:32:55" (1/1) ... [2024-06-21 21:32:55,332 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:32:55" (1/1) ... [2024-06-21 21:32:55,381 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-21 21:32:55,384 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:32:55,385 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:32:55,385 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:32:55,385 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:32:55,395 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:32:55" (1/1) ... [2024-06-21 21:32:55,395 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:32:55" (1/1) ... [2024-06-21 21:32:55,402 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:32:55" (1/1) ... [2024-06-21 21:32:55,419 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]. [2024-06-21 21:32:55,420 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:32:55" (1/1) ... [2024-06-21 21:32:55,420 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:32:55" (1/1) ... [2024-06-21 21:32:55,431 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:32:55" (1/1) ... [2024-06-21 21:32:55,433 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:32:55" (1/1) ... [2024-06-21 21:32:55,435 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:32:55" (1/1) ... [2024-06-21 21:32:55,436 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:32:55" (1/1) ... [2024-06-21 21:32:55,440 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:32:55,441 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:32:55,441 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:32:55,441 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:32:55,442 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:32:55" (1/1) ... [2024-06-21 21:32:55,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:32:55,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:32:55,484 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) [2024-06-21 21:32:55,505 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 [2024-06-21 21:32:55,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:32:55,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:32:55,536 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:32:55,536 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:32:55,536 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:32:55,537 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:32:55,537 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:32:55,537 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:32:55,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:32:55,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:32:55,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:32:55,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:32:55,539 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:32:55,688 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:32:55,690 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:32:56,070 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:32:56,070 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:32:56,224 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:32:56,225 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:32:56,225 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:32:56 BoogieIcfgContainer [2024-06-21 21:32:56,225 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:32:56,228 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:32:56,228 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:32:56,231 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:32:56,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:32:54" (1/4) ... [2024-06-21 21:32:56,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5d4584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:32:56, skipping insertion in model container [2024-06-21 21:32:56,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:32:54" (2/4) ... [2024-06-21 21:32:56,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5d4584 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:32:56, skipping insertion in model container [2024-06-21 21:32:56,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:32:55" (3/4) ... [2024-06-21 21:32:56,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5d4584 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:32:56, skipping insertion in model container [2024-06-21 21:32:56,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:32:56" (4/4) ... [2024-06-21 21:32:56,234 INFO L112 eAbstractionObserver]: Analyzing ICFG safe004_power.opt_pso.opt_rmo.opt.i [2024-06-21 21:32:56,248 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:32:56,248 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 21:32:56,248 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:32:56,296 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:32:56,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 21:32:56,363 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 21:32:56,363 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:32:56,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:32:56,366 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 21:32:56,371 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 21:32:56,383 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:32:56,391 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;@19b6b91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:32:56,391 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 21:32:56,397 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:32:56,397 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:32:56,398 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:32:56,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:56,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:32:56,399 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)] === [2024-06-21 21:32:56,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:56,404 INFO L85 PathProgramCache]: Analyzing trace with hash 368623954, now seen corresponding path program 1 times [2024-06-21 21:32:56,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:56,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006382525] [2024-06-21 21:32:56,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:56,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:57,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:57,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006382525] [2024-06-21 21:32:57,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006382525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:57,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:57,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:32:57,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364401305] [2024-06-21 21:32:57,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:57,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:32:57,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:57,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:32:57,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:32:57,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 21:32:57,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:57,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:57,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 21:32:57,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:57,844 INFO L124 PetriNetUnfolderBase]: 1152/1755 cut-off events. [2024-06-21 21:32:57,844 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-21 21:32:57,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3595 conditions, 1755 events. 1152/1755 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8184 event pairs, 794 based on Foata normal form. 2/1710 useless extension candidates. Maximal degree in co-relation 3583. Up to 1738 conditions per place. [2024-06-21 21:32:57,862 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 21:32:57,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 171 flow [2024-06-21 21:32:57,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:32:57,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:32:57,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-21 21:32:57,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 21:32:57,875 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 72 transitions. [2024-06-21 21:32:57,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 171 flow [2024-06-21 21:32:57,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 21:32:57,880 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 21:32:57,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-21 21:32:57,885 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 21:32:57,885 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 21:32:57,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:57,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:57,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:57,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:32:57,886 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)] === [2024-06-21 21:32:57,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:57,886 INFO L85 PathProgramCache]: Analyzing trace with hash 2060553313, now seen corresponding path program 1 times [2024-06-21 21:32:57,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:57,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069331361] [2024-06-21 21:32:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:57,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:58,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:58,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:58,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069331361] [2024-06-21 21:32:58,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069331361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:58,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:58,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:32:58,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815712028] [2024-06-21 21:32:58,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:58,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:32:58,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:58,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:32:58,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:32:58,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:32:58,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:58,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:58,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:32:58,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:58,908 INFO L124 PetriNetUnfolderBase]: 1644/2456 cut-off events. [2024-06-21 21:32:58,908 INFO L125 PetriNetUnfolderBase]: For 375/375 co-relation queries the response was YES. [2024-06-21 21:32:58,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5637 conditions, 2456 events. 1644/2456 cut-off events. For 375/375 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11062 event pairs, 1035 based on Foata normal form. 3/2457 useless extension candidates. Maximal degree in co-relation 5625. Up to 2429 conditions per place. [2024-06-21 21:32:58,923 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 43 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-21 21:32:58,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 254 flow [2024-06-21 21:32:58,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:32:58,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:32:58,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-06-21 21:32:58,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-21 21:32:58,928 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 86 transitions. [2024-06-21 21:32:58,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 254 flow [2024-06-21 21:32:58,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:32:58,931 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-21 21:32:58,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-21 21:32:58,932 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-21 21:32:58,932 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-21 21:32:58,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:58,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:58,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:58,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:32:58,935 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:58,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:58,936 INFO L85 PathProgramCache]: Analyzing trace with hash -547356015, now seen corresponding path program 1 times [2024-06-21 21:32:58,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:58,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440106958] [2024-06-21 21:32:58,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:58,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:59,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:59,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440106958] [2024-06-21 21:32:59,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440106958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:59,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:59,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:32:59,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589201145] [2024-06-21 21:32:59,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:59,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:32:59,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:59,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:32:59,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:32:59,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:32:59,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:59,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:59,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:32:59,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:59,969 INFO L124 PetriNetUnfolderBase]: 1632/2438 cut-off events. [2024-06-21 21:32:59,970 INFO L125 PetriNetUnfolderBase]: For 1217/1217 co-relation queries the response was YES. [2024-06-21 21:32:59,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6212 conditions, 2438 events. 1632/2438 cut-off events. For 1217/1217 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10956 event pairs, 743 based on Foata normal form. 6/2442 useless extension candidates. Maximal degree in co-relation 6197. Up to 2381 conditions per place. [2024-06-21 21:32:59,985 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 51 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-21 21:32:59,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 65 transitions, 340 flow [2024-06-21 21:32:59,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:32:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:32:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-21 21:32:59,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-06-21 21:32:59,987 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 106 transitions. [2024-06-21 21:32:59,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 65 transitions, 340 flow [2024-06-21 21:32:59,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 338 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 21:32:59,990 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 196 flow [2024-06-21 21:32:59,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 21:32:59,991 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-06-21 21:32:59,991 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 196 flow [2024-06-21 21:32:59,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:59,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:59,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:59,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:32:59,992 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)] === [2024-06-21 21:32:59,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:59,993 INFO L85 PathProgramCache]: Analyzing trace with hash -304157824, now seen corresponding path program 1 times [2024-06-21 21:32:59,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:59,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992454864] [2024-06-21 21:32:59,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:59,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:01,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:01,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992454864] [2024-06-21 21:33:01,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992454864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:01,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:01,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:33:01,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800066065] [2024-06-21 21:33:01,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:01,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:33:01,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:01,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:33:01,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:33:01,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:33:01,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:01,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:01,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:33:01,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:01,743 INFO L124 PetriNetUnfolderBase]: 1623/2423 cut-off events. [2024-06-21 21:33:01,744 INFO L125 PetriNetUnfolderBase]: For 2223/2223 co-relation queries the response was YES. [2024-06-21 21:33:01,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6779 conditions, 2423 events. 1623/2423 cut-off events. For 2223/2223 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10845 event pairs, 579 based on Foata normal form. 6/2427 useless extension candidates. Maximal degree in co-relation 6761. Up to 2336 conditions per place. [2024-06-21 21:33:01,757 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 55 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-21 21:33:01,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 404 flow [2024-06-21 21:33:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:33:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:33:01,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-21 21:33:01,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041666666666667 [2024-06-21 21:33:01,759 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 196 flow. Second operand 6 states and 121 transitions. [2024-06-21 21:33:01,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 404 flow [2024-06-21 21:33:01,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 382 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 21:33:01,766 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 215 flow [2024-06-21 21:33:01,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=215, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-06-21 21:33:01,768 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-21 21:33:01,768 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 215 flow [2024-06-21 21:33:01,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:01,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:01,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:01,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:33:01,769 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)] === [2024-06-21 21:33:01,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:01,769 INFO L85 PathProgramCache]: Analyzing trace with hash -546325912, now seen corresponding path program 1 times [2024-06-21 21:33:01,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:01,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672952947] [2024-06-21 21:33:01,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:01,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:02,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:02,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672952947] [2024-06-21 21:33:02,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672952947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:02,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:02,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:33:02,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544239492] [2024-06-21 21:33:02,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:02,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:33:02,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:02,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:33:02,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:33:02,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:33:02,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 215 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:02,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:02,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:33:02,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:02,742 INFO L124 PetriNetUnfolderBase]: 1245/1943 cut-off events. [2024-06-21 21:33:02,742 INFO L125 PetriNetUnfolderBase]: For 2900/2936 co-relation queries the response was YES. [2024-06-21 21:33:02,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5722 conditions, 1943 events. 1245/1943 cut-off events. For 2900/2936 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9331 event pairs, 585 based on Foata normal form. 4/1878 useless extension candidates. Maximal degree in co-relation 5702. Up to 1826 conditions per place. [2024-06-21 21:33:02,757 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 43 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-21 21:33:02,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 62 transitions, 375 flow [2024-06-21 21:33:02,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:33:02,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:33:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-21 21:33:02,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:33:02,759 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 215 flow. Second operand 5 states and 90 transitions. [2024-06-21 21:33:02,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 62 transitions, 375 flow [2024-06-21 21:33:02,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 344 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 21:33:02,768 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 255 flow [2024-06-21 21:33:02,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-21 21:33:02,770 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-06-21 21:33:02,770 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 255 flow [2024-06-21 21:33:02,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:02,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:02,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:02,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:33:02,772 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)] === [2024-06-21 21:33:02,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:02,772 INFO L85 PathProgramCache]: Analyzing trace with hash 243767570, now seen corresponding path program 1 times [2024-06-21 21:33:02,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:02,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956340242] [2024-06-21 21:33:02,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:02,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:03,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:03,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956340242] [2024-06-21 21:33:03,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956340242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:03,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:03,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:33:03,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988679015] [2024-06-21 21:33:03,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:03,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:33:03,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:03,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:33:03,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:33:03,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:03,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 255 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:03,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:03,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:03,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:03,988 INFO L124 PetriNetUnfolderBase]: 1626/2431 cut-off events. [2024-06-21 21:33:03,988 INFO L125 PetriNetUnfolderBase]: For 4634/4646 co-relation queries the response was YES. [2024-06-21 21:33:03,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7866 conditions, 2431 events. 1626/2431 cut-off events. For 4634/4646 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10946 event pairs, 734 based on Foata normal form. 12/2439 useless extension candidates. Maximal degree in co-relation 7843. Up to 2346 conditions per place. [2024-06-21 21:33:04,007 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 58 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-21 21:33:04,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 77 transitions, 515 flow [2024-06-21 21:33:04,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:33:04,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:33:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 21:33:04,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-21 21:33:04,010 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 255 flow. Second operand 6 states and 101 transitions. [2024-06-21 21:33:04,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 77 transitions, 515 flow [2024-06-21 21:33:04,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 498 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 21:33:04,019 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 346 flow [2024-06-21 21:33:04,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=346, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2024-06-21 21:33:04,023 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-21 21:33:04,023 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 346 flow [2024-06-21 21:33:04,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:04,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:04,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:04,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:33:04,025 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)] === [2024-06-21 21:33:04,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:04,025 INFO L85 PathProgramCache]: Analyzing trace with hash 231276359, now seen corresponding path program 1 times [2024-06-21 21:33:04,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:04,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690972489] [2024-06-21 21:33:04,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:04,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:04,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:04,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690972489] [2024-06-21 21:33:04,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690972489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:04,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:04,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:33:04,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753338728] [2024-06-21 21:33:04,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:04,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:33:04,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:04,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:33:04,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:33:04,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:04,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 346 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:04,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:04,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:04,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:05,180 INFO L124 PetriNetUnfolderBase]: 1649/2465 cut-off events. [2024-06-21 21:33:05,181 INFO L125 PetriNetUnfolderBase]: For 6739/6739 co-relation queries the response was YES. [2024-06-21 21:33:05,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8891 conditions, 2465 events. 1649/2465 cut-off events. For 6739/6739 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11041 event pairs, 758 based on Foata normal form. 2/2465 useless extension candidates. Maximal degree in co-relation 8865. Up to 2422 conditions per place. [2024-06-21 21:33:05,204 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 69 selfloop transitions, 16 changer transitions 0/88 dead transitions. [2024-06-21 21:33:05,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 88 transitions, 626 flow [2024-06-21 21:33:05,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:33:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:33:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 21:33:05,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 21:33:05,207 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 346 flow. Second operand 7 states and 113 transitions. [2024-06-21 21:33:05,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 88 transitions, 626 flow [2024-06-21 21:33:05,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 88 transitions, 597 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 21:33:05,214 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 427 flow [2024-06-21 21:33:05,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=427, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-06-21 21:33:05,215 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-21 21:33:05,215 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 427 flow [2024-06-21 21:33:05,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:05,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:05,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:05,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:33:05,216 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:05,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:05,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1038860089, now seen corresponding path program 2 times [2024-06-21 21:33:05,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:05,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881570914] [2024-06-21 21:33:05,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:05,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:05,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:05,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881570914] [2024-06-21 21:33:05,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881570914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:05,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:05,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:33:05,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895869881] [2024-06-21 21:33:05,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:05,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:33:05,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:05,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:33:05,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:33:05,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:05,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 427 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:05,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:05,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:05,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:06,335 INFO L124 PetriNetUnfolderBase]: 1660/2481 cut-off events. [2024-06-21 21:33:06,335 INFO L125 PetriNetUnfolderBase]: For 8271/8271 co-relation queries the response was YES. [2024-06-21 21:33:06,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9213 conditions, 2481 events. 1660/2481 cut-off events. For 8271/8271 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11147 event pairs, 754 based on Foata normal form. 2/2481 useless extension candidates. Maximal degree in co-relation 9184. Up to 2429 conditions per place. [2024-06-21 21:33:06,352 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 67 selfloop transitions, 17 changer transitions 0/87 dead transitions. [2024-06-21 21:33:06,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 677 flow [2024-06-21 21:33:06,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:33:06,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:33:06,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-21 21:33:06,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 21:33:06,354 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 427 flow. Second operand 6 states and 98 transitions. [2024-06-21 21:33:06,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 677 flow [2024-06-21 21:33:06,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 636 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 21:33:06,363 INFO L231 Difference]: Finished difference. Result has 66 places, 70 transitions, 468 flow [2024-06-21 21:33:06,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=468, PETRI_PLACES=66, PETRI_TRANSITIONS=70} [2024-06-21 21:33:06,365 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-21 21:33:06,365 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 70 transitions, 468 flow [2024-06-21 21:33:06,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:06,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:06,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:06,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:33:06,366 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)] === [2024-06-21 21:33:06,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:06,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1033146169, now seen corresponding path program 3 times [2024-06-21 21:33:06,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:06,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584927686] [2024-06-21 21:33:06,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:06,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:06,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:06,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584927686] [2024-06-21 21:33:06,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584927686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:06,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:06,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:33:06,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539848131] [2024-06-21 21:33:06,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:06,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:33:06,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:06,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:33:06,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:33:07,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:07,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 70 transitions, 468 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:07,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:07,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:07,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:07,458 INFO L124 PetriNetUnfolderBase]: 1647/2464 cut-off events. [2024-06-21 21:33:07,458 INFO L125 PetriNetUnfolderBase]: For 9961/9973 co-relation queries the response was YES. [2024-06-21 21:33:07,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9376 conditions, 2464 events. 1647/2464 cut-off events. For 9961/9973 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11101 event pairs, 759 based on Foata normal form. 12/2470 useless extension candidates. Maximal degree in co-relation 9347. Up to 2355 conditions per place. [2024-06-21 21:33:07,514 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 60 selfloop transitions, 24 changer transitions 0/87 dead transitions. [2024-06-21 21:33:07,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 87 transitions, 699 flow [2024-06-21 21:33:07,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:33:07,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:33:07,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 21:33:07,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 21:33:07,517 INFO L175 Difference]: Start difference. First operand has 66 places, 70 transitions, 468 flow. Second operand 6 states and 99 transitions. [2024-06-21 21:33:07,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 87 transitions, 699 flow [2024-06-21 21:33:07,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 87 transitions, 643 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 21:33:07,530 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 503 flow [2024-06-21 21:33:07,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=503, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2024-06-21 21:33:07,531 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-21 21:33:07,531 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 503 flow [2024-06-21 21:33:07,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:07,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:07,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:07,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:33:07,532 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)] === [2024-06-21 21:33:07,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:07,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1033138233, now seen corresponding path program 1 times [2024-06-21 21:33:07,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:07,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269427272] [2024-06-21 21:33:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:07,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:08,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:08,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269427272] [2024-06-21 21:33:08,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269427272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:08,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:08,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:33:08,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772807910] [2024-06-21 21:33:08,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:08,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:33:08,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:08,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:33:08,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:33:08,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:08,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 503 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:08,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:08,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:08,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:09,003 INFO L124 PetriNetUnfolderBase]: 1653/2473 cut-off events. [2024-06-21 21:33:09,004 INFO L125 PetriNetUnfolderBase]: For 9851/9863 co-relation queries the response was YES. [2024-06-21 21:33:09,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9455 conditions, 2473 events. 1653/2473 cut-off events. For 9851/9863 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11113 event pairs, 723 based on Foata normal form. 12/2479 useless extension candidates. Maximal degree in co-relation 9424. Up to 2346 conditions per place. [2024-06-21 21:33:09,018 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 62 selfloop transitions, 30 changer transitions 0/95 dead transitions. [2024-06-21 21:33:09,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 95 transitions, 769 flow [2024-06-21 21:33:09,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:33:09,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:33:09,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 21:33:09,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-21 21:33:09,020 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 503 flow. Second operand 7 states and 114 transitions. [2024-06-21 21:33:09,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 95 transitions, 769 flow [2024-06-21 21:33:09,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 95 transitions, 733 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:33:09,031 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 568 flow [2024-06-21 21:33:09,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=568, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-21 21:33:09,032 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-21 21:33:09,034 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 568 flow [2024-06-21 21:33:09,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:09,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:09,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:09,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:33:09,035 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)] === [2024-06-21 21:33:09,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:09,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1905986761, now seen corresponding path program 1 times [2024-06-21 21:33:09,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:09,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449695298] [2024-06-21 21:33:09,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:09,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:09,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:09,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449695298] [2024-06-21 21:33:09,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449695298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:09,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:09,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:33:09,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631613864] [2024-06-21 21:33:09,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:09,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:33:09,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:09,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:33:09,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:33:09,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:09,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 568 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:09,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:09,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:09,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:10,392 INFO L124 PetriNetUnfolderBase]: 1675/2503 cut-off events. [2024-06-21 21:33:10,392 INFO L125 PetriNetUnfolderBase]: For 12109/12109 co-relation queries the response was YES. [2024-06-21 21:33:10,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10254 conditions, 2503 events. 1675/2503 cut-off events. For 12109/12109 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11226 event pairs, 575 based on Foata normal form. 4/2505 useless extension candidates. Maximal degree in co-relation 10222. Up to 2415 conditions per place. [2024-06-21 21:33:10,410 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 85 selfloop transitions, 20 changer transitions 0/108 dead transitions. [2024-06-21 21:33:10,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 108 transitions, 888 flow [2024-06-21 21:33:10,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:33:10,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:33:10,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 21:33:10,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-21 21:33:10,412 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 568 flow. Second operand 7 states and 117 transitions. [2024-06-21 21:33:10,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 108 transitions, 888 flow [2024-06-21 21:33:10,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 108 transitions, 817 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 21:33:10,425 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 588 flow [2024-06-21 21:33:10,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2024-06-21 21:33:10,426 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-06-21 21:33:10,426 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 588 flow [2024-06-21 21:33:10,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:10,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:10,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:10,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:33:10,427 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)] === [2024-06-21 21:33:10,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:10,427 INFO L85 PathProgramCache]: Analyzing trace with hash -356135449, now seen corresponding path program 2 times [2024-06-21 21:33:10,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:10,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547418103] [2024-06-21 21:33:10,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:10,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:11,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:11,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547418103] [2024-06-21 21:33:11,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547418103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:11,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:11,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:33:11,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365111497] [2024-06-21 21:33:11,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:11,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:33:11,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:11,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:33:11,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:33:11,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:11,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 588 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:11,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:11,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:11,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:11,578 INFO L124 PetriNetUnfolderBase]: 1713/2558 cut-off events. [2024-06-21 21:33:11,579 INFO L125 PetriNetUnfolderBase]: For 15207/15207 co-relation queries the response was YES. [2024-06-21 21:33:11,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11138 conditions, 2558 events. 1713/2558 cut-off events. For 15207/15207 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11492 event pairs, 562 based on Foata normal form. 4/2560 useless extension candidates. Maximal degree in co-relation 11104. Up to 2418 conditions per place. [2024-06-21 21:33:11,595 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 82 selfloop transitions, 29 changer transitions 0/114 dead transitions. [2024-06-21 21:33:11,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 114 transitions, 982 flow [2024-06-21 21:33:11,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:33:11,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:33:11,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 21:33:11,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 21:33:11,597 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 588 flow. Second operand 7 states and 119 transitions. [2024-06-21 21:33:11,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 114 transitions, 982 flow [2024-06-21 21:33:11,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 114 transitions, 948 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 21:33:11,612 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 679 flow [2024-06-21 21:33:11,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=679, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2024-06-21 21:33:11,613 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-21 21:33:11,613 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 679 flow [2024-06-21 21:33:11,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:11,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:11,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:11,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:33:11,614 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)] === [2024-06-21 21:33:11,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:11,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1962758695, now seen corresponding path program 3 times [2024-06-21 21:33:11,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:11,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524000062] [2024-06-21 21:33:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:11,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:12,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:12,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524000062] [2024-06-21 21:33:12,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524000062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:12,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:12,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:33:12,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783485932] [2024-06-21 21:33:12,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:12,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:33:12,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:12,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:33:12,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:33:12,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:12,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 679 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:12,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:12,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:12,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:12,841 INFO L124 PetriNetUnfolderBase]: 1785/2669 cut-off events. [2024-06-21 21:33:12,841 INFO L125 PetriNetUnfolderBase]: For 19645/19651 co-relation queries the response was YES. [2024-06-21 21:33:12,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12138 conditions, 2669 events. 1785/2669 cut-off events. For 19645/19651 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12090 event pairs, 498 based on Foata normal form. 16/2676 useless extension candidates. Maximal degree in co-relation 12103. Up to 2249 conditions per place. [2024-06-21 21:33:12,858 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 82 selfloop transitions, 46 changer transitions 0/131 dead transitions. [2024-06-21 21:33:12,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 131 transitions, 1244 flow [2024-06-21 21:33:12,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:12,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:12,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:33:12,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 21:33:12,860 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 679 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:33:12,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 131 transitions, 1244 flow [2024-06-21 21:33:12,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 131 transitions, 1205 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 21:33:12,879 INFO L231 Difference]: Finished difference. Result has 87 places, 102 transitions, 887 flow [2024-06-21 21:33:12,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=887, PETRI_PLACES=87, PETRI_TRANSITIONS=102} [2024-06-21 21:33:12,908 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 46 predicate places. [2024-06-21 21:33:12,908 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 102 transitions, 887 flow [2024-06-21 21:33:12,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:12,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:12,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:12,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:33:12,909 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)] === [2024-06-21 21:33:12,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:12,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1962512431, now seen corresponding path program 1 times [2024-06-21 21:33:12,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:12,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752142110] [2024-06-21 21:33:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:12,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:13,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:13,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752142110] [2024-06-21 21:33:13,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752142110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:13,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:13,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:13,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604166139] [2024-06-21 21:33:13,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:13,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:13,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:13,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:13,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:13,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:13,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 102 transitions, 887 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:13,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:13,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:13,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:14,465 INFO L124 PetriNetUnfolderBase]: 1794/2681 cut-off events. [2024-06-21 21:33:14,466 INFO L125 PetriNetUnfolderBase]: For 23353/23368 co-relation queries the response was YES. [2024-06-21 21:33:14,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13324 conditions, 2681 events. 1794/2681 cut-off events. For 23353/23368 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12131 event pairs, 508 based on Foata normal form. 18/2693 useless extension candidates. Maximal degree in co-relation 13285. Up to 2518 conditions per place. [2024-06-21 21:33:14,488 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 93 selfloop transitions, 33 changer transitions 0/129 dead transitions. [2024-06-21 21:33:14,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 129 transitions, 1250 flow [2024-06-21 21:33:14,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:14,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:14,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 21:33:14,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-21 21:33:14,490 INFO L175 Difference]: Start difference. First operand has 87 places, 102 transitions, 887 flow. Second operand 8 states and 129 transitions. [2024-06-21 21:33:14,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 129 transitions, 1250 flow [2024-06-21 21:33:14,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 129 transitions, 1214 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-21 21:33:14,518 INFO L231 Difference]: Finished difference. Result has 94 places, 105 transitions, 967 flow [2024-06-21 21:33:14,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=967, PETRI_PLACES=94, PETRI_TRANSITIONS=105} [2024-06-21 21:33:14,519 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2024-06-21 21:33:14,519 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 105 transitions, 967 flow [2024-06-21 21:33:14,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:14,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:14,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:14,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:33:14,520 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)] === [2024-06-21 21:33:14,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:14,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1043950336, now seen corresponding path program 1 times [2024-06-21 21:33:14,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:14,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182188668] [2024-06-21 21:33:14,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:14,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:15,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:15,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182188668] [2024-06-21 21:33:15,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182188668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:15,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:15,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:15,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273478247] [2024-06-21 21:33:15,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:15,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:15,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:15,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:15,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:15,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:15,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 105 transitions, 967 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:15,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:15,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:15,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:16,048 INFO L124 PetriNetUnfolderBase]: 1789/2672 cut-off events. [2024-06-21 21:33:16,048 INFO L125 PetriNetUnfolderBase]: For 25428/25428 co-relation queries the response was YES. [2024-06-21 21:33:16,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13691 conditions, 2672 events. 1789/2672 cut-off events. For 25428/25428 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12077 event pairs, 533 based on Foata normal form. 2/2672 useless extension candidates. Maximal degree in co-relation 13649. Up to 2575 conditions per place. [2024-06-21 21:33:16,108 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 103 selfloop transitions, 23 changer transitions 0/129 dead transitions. [2024-06-21 21:33:16,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 129 transitions, 1296 flow [2024-06-21 21:33:16,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:33:16,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:33:16,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 21:33:16,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-21 21:33:16,110 INFO L175 Difference]: Start difference. First operand has 94 places, 105 transitions, 967 flow. Second operand 7 states and 117 transitions. [2024-06-21 21:33:16,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 129 transitions, 1296 flow [2024-06-21 21:33:16,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 129 transitions, 1194 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:16,137 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 923 flow [2024-06-21 21:33:16,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=923, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2024-06-21 21:33:16,138 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-21 21:33:16,138 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 923 flow [2024-06-21 21:33:16,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:16,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:16,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:16,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:33:16,139 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:16,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:16,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1915804637, now seen corresponding path program 1 times [2024-06-21 21:33:16,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:16,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824807417] [2024-06-21 21:33:16,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:16,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:16,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:16,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824807417] [2024-06-21 21:33:16,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824807417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:16,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:16,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:33:16,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627292485] [2024-06-21 21:33:16,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:16,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:33:16,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:16,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:33:16,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:33:16,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:16,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 923 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:16,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:16,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:16,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:17,268 INFO L124 PetriNetUnfolderBase]: 1811/2708 cut-off events. [2024-06-21 21:33:17,269 INFO L125 PetriNetUnfolderBase]: For 29047/29068 co-relation queries the response was YES. [2024-06-21 21:33:17,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13879 conditions, 2708 events. 1811/2708 cut-off events. For 29047/29068 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12280 event pairs, 524 based on Foata normal form. 18/2718 useless extension candidates. Maximal degree in co-relation 13836. Up to 2593 conditions per place. [2024-06-21 21:33:17,287 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 105 selfloop transitions, 23 changer transitions 0/131 dead transitions. [2024-06-21 21:33:17,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 131 transitions, 1286 flow [2024-06-21 21:33:17,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:33:17,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:33:17,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 21:33:17,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 21:33:17,289 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 923 flow. Second operand 7 states and 116 transitions. [2024-06-21 21:33:17,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 131 transitions, 1286 flow [2024-06-21 21:33:17,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 131 transitions, 1228 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:17,313 INFO L231 Difference]: Finished difference. Result has 96 places, 108 transitions, 957 flow [2024-06-21 21:33:17,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=957, PETRI_PLACES=96, PETRI_TRANSITIONS=108} [2024-06-21 21:33:17,314 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-06-21 21:33:17,314 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 108 transitions, 957 flow [2024-06-21 21:33:17,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:17,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:17,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:17,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:33:17,315 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:17,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:17,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1047673281, now seen corresponding path program 2 times [2024-06-21 21:33:17,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:17,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162253092] [2024-06-21 21:33:17,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:17,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:17,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:17,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162253092] [2024-06-21 21:33:17,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162253092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:17,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:17,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:33:17,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976445604] [2024-06-21 21:33:17,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:17,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:33:17,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:17,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:33:17,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:33:18,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:18,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 108 transitions, 957 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:18,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:18,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:18,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:18,480 INFO L124 PetriNetUnfolderBase]: 1881/2810 cut-off events. [2024-06-21 21:33:18,480 INFO L125 PetriNetUnfolderBase]: For 33862/33871 co-relation queries the response was YES. [2024-06-21 21:33:18,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14852 conditions, 2810 events. 1881/2810 cut-off events. For 33862/33871 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12808 event pairs, 508 based on Foata normal form. 8/2809 useless extension candidates. Maximal degree in co-relation 14808. Up to 2316 conditions per place. [2024-06-21 21:33:18,496 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 84 selfloop transitions, 54 changer transitions 0/141 dead transitions. [2024-06-21 21:33:18,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 141 transitions, 1517 flow [2024-06-21 21:33:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:33:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:33:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 21:33:18,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 21:33:18,498 INFO L175 Difference]: Start difference. First operand has 96 places, 108 transitions, 957 flow. Second operand 7 states and 125 transitions. [2024-06-21 21:33:18,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 141 transitions, 1517 flow [2024-06-21 21:33:18,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 141 transitions, 1453 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 21:33:18,527 INFO L231 Difference]: Finished difference. Result has 99 places, 115 transitions, 1114 flow [2024-06-21 21:33:18,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1114, PETRI_PLACES=99, PETRI_TRANSITIONS=115} [2024-06-21 21:33:18,528 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 58 predicate places. [2024-06-21 21:33:18,528 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 115 transitions, 1114 flow [2024-06-21 21:33:18,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:18,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:18,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:18,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:33:18,529 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:18,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:18,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1047678861, now seen corresponding path program 3 times [2024-06-21 21:33:18,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:18,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118500011] [2024-06-21 21:33:18,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:18,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:19,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:19,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118500011] [2024-06-21 21:33:19,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118500011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:19,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:19,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:33:19,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984208119] [2024-06-21 21:33:19,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:19,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:33:19,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:33:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:33:19,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:19,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 115 transitions, 1114 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:19,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:19,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:19,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:19,672 INFO L124 PetriNetUnfolderBase]: 1861/2782 cut-off events. [2024-06-21 21:33:19,673 INFO L125 PetriNetUnfolderBase]: For 37878/37887 co-relation queries the response was YES. [2024-06-21 21:33:19,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15380 conditions, 2782 events. 1861/2782 cut-off events. For 37878/37887 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12617 event pairs, 512 based on Foata normal form. 12/2785 useless extension candidates. Maximal degree in co-relation 15334. Up to 2304 conditions per place. [2024-06-21 21:33:19,689 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 82 selfloop transitions, 56 changer transitions 0/141 dead transitions. [2024-06-21 21:33:19,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 141 transitions, 1604 flow [2024-06-21 21:33:19,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:33:19,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:33:19,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 21:33:19,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2024-06-21 21:33:19,691 INFO L175 Difference]: Start difference. First operand has 99 places, 115 transitions, 1114 flow. Second operand 7 states and 127 transitions. [2024-06-21 21:33:19,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 141 transitions, 1604 flow [2024-06-21 21:33:19,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 141 transitions, 1500 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 21:33:19,731 INFO L231 Difference]: Finished difference. Result has 103 places, 115 transitions, 1132 flow [2024-06-21 21:33:19,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1132, PETRI_PLACES=103, PETRI_TRANSITIONS=115} [2024-06-21 21:33:19,731 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2024-06-21 21:33:19,732 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 115 transitions, 1132 flow [2024-06-21 21:33:19,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:19,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:19,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:19,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:33:19,733 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:19,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:19,733 INFO L85 PathProgramCache]: Analyzing trace with hash -708351386, now seen corresponding path program 1 times [2024-06-21 21:33:19,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:19,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280252239] [2024-06-21 21:33:19,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:19,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:20,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:20,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280252239] [2024-06-21 21:33:20,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280252239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:20,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:20,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:33:20,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91512600] [2024-06-21 21:33:20,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:20,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:33:20,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:20,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:33:20,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:33:20,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:20,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 115 transitions, 1132 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:20,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:20,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:20,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:21,137 INFO L124 PetriNetUnfolderBase]: 1850/2762 cut-off events. [2024-06-21 21:33:21,138 INFO L125 PetriNetUnfolderBase]: For 40414/40429 co-relation queries the response was YES. [2024-06-21 21:33:21,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15429 conditions, 2762 events. 1850/2762 cut-off events. For 40414/40429 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12551 event pairs, 525 based on Foata normal form. 12/2768 useless extension candidates. Maximal degree in co-relation 15382. Up to 2621 conditions per place. [2024-06-21 21:33:21,154 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 106 selfloop transitions, 31 changer transitions 0/140 dead transitions. [2024-06-21 21:33:21,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 140 transitions, 1507 flow [2024-06-21 21:33:21,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 21:33:21,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:33:21,155 INFO L175 Difference]: Start difference. First operand has 103 places, 115 transitions, 1132 flow. Second operand 8 states and 128 transitions. [2024-06-21 21:33:21,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 140 transitions, 1507 flow [2024-06-21 21:33:21,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 140 transitions, 1360 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:21,182 INFO L231 Difference]: Finished difference. Result has 105 places, 117 transitions, 1088 flow [2024-06-21 21:33:21,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1088, PETRI_PLACES=105, PETRI_TRANSITIONS=117} [2024-06-21 21:33:21,182 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-21 21:33:21,183 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 117 transitions, 1088 flow [2024-06-21 21:33:21,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:21,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:21,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:21,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:33:21,183 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:21,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:21,184 INFO L85 PathProgramCache]: Analyzing trace with hash -2000018058, now seen corresponding path program 1 times [2024-06-21 21:33:21,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:21,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486524991] [2024-06-21 21:33:21,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:21,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:22,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:22,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:22,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486524991] [2024-06-21 21:33:22,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486524991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:22,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:22,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:22,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943935464] [2024-06-21 21:33:22,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:22,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:22,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:22,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:22,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:22,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:22,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 117 transitions, 1088 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:22,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:22,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:22,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:22,976 INFO L124 PetriNetUnfolderBase]: 1867/2787 cut-off events. [2024-06-21 21:33:22,977 INFO L125 PetriNetUnfolderBase]: For 43523/43523 co-relation queries the response was YES. [2024-06-21 21:33:22,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15573 conditions, 2787 events. 1867/2787 cut-off events. For 43523/43523 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12668 event pairs, 361 based on Foata normal form. 4/2789 useless extension candidates. Maximal degree in co-relation 15525. Up to 2664 conditions per place. [2024-06-21 21:33:22,992 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 124 selfloop transitions, 21 changer transitions 0/148 dead transitions. [2024-06-21 21:33:22,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 148 transitions, 1497 flow [2024-06-21 21:33:22,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:22,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 21:33:22,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 21:33:22,993 INFO L175 Difference]: Start difference. First operand has 105 places, 117 transitions, 1088 flow. Second operand 8 states and 130 transitions. [2024-06-21 21:33:22,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 148 transitions, 1497 flow [2024-06-21 21:33:23,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 148 transitions, 1422 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:23,021 INFO L231 Difference]: Finished difference. Result has 107 places, 119 transitions, 1096 flow [2024-06-21 21:33:23,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1096, PETRI_PLACES=107, PETRI_TRANSITIONS=119} [2024-06-21 21:33:23,022 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-21 21:33:23,022 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 119 transitions, 1096 flow [2024-06-21 21:33:23,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:23,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:23,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:23,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:33:23,023 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:23,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:23,023 INFO L85 PathProgramCache]: Analyzing trace with hash 739479930, now seen corresponding path program 1 times [2024-06-21 21:33:23,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:23,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145447357] [2024-06-21 21:33:23,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:23,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:24,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:24,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145447357] [2024-06-21 21:33:24,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145447357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:24,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:24,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:24,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947949150] [2024-06-21 21:33:24,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:24,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:24,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:24,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:24,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:24,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:24,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 119 transitions, 1096 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:24,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:24,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:24,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:24,598 INFO L124 PetriNetUnfolderBase]: 1957/2924 cut-off events. [2024-06-21 21:33:24,598 INFO L125 PetriNetUnfolderBase]: For 48209/48221 co-relation queries the response was YES. [2024-06-21 21:33:24,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16522 conditions, 2924 events. 1957/2924 cut-off events. For 48209/48221 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13400 event pairs, 491 based on Foata normal form. 10/2925 useless extension candidates. Maximal degree in co-relation 16473. Up to 2774 conditions per place. [2024-06-21 21:33:24,617 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 123 selfloop transitions, 35 changer transitions 0/161 dead transitions. [2024-06-21 21:33:24,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 161 transitions, 1685 flow [2024-06-21 21:33:24,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:24,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:24,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 21:33:24,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 21:33:24,619 INFO L175 Difference]: Start difference. First operand has 107 places, 119 transitions, 1096 flow. Second operand 8 states and 127 transitions. [2024-06-21 21:33:24,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 161 transitions, 1685 flow [2024-06-21 21:33:24,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 161 transitions, 1606 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:24,657 INFO L231 Difference]: Finished difference. Result has 111 places, 137 transitions, 1333 flow [2024-06-21 21:33:24,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1333, PETRI_PLACES=111, PETRI_TRANSITIONS=137} [2024-06-21 21:33:24,658 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2024-06-21 21:33:24,658 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 137 transitions, 1333 flow [2024-06-21 21:33:24,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:24,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:24,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:24,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:33:24,658 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:24,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:24,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1169006990, now seen corresponding path program 2 times [2024-06-21 21:33:24,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:24,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272046123] [2024-06-21 21:33:24,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:24,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:25,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:25,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272046123] [2024-06-21 21:33:25,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272046123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:25,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:25,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:25,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6361832] [2024-06-21 21:33:25,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:25,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:25,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:25,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:25,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:25,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:25,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 137 transitions, 1333 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:25,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:25,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:25,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:26,147 INFO L124 PetriNetUnfolderBase]: 2008/3000 cut-off events. [2024-06-21 21:33:26,147 INFO L125 PetriNetUnfolderBase]: For 53262/53274 co-relation queries the response was YES. [2024-06-21 21:33:26,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17404 conditions, 3000 events. 2008/3000 cut-off events. For 53262/53274 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13827 event pairs, 471 based on Foata normal form. 10/3004 useless extension candidates. Maximal degree in co-relation 17352. Up to 2807 conditions per place. [2024-06-21 21:33:26,167 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 130 selfloop transitions, 53 changer transitions 0/186 dead transitions. [2024-06-21 21:33:26,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 186 transitions, 2054 flow [2024-06-21 21:33:26,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 21:33:26,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 21:33:26,169 INFO L175 Difference]: Start difference. First operand has 111 places, 137 transitions, 1333 flow. Second operand 8 states and 132 transitions. [2024-06-21 21:33:26,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 186 transitions, 2054 flow [2024-06-21 21:33:26,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 186 transitions, 1940 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 21:33:26,211 INFO L231 Difference]: Finished difference. Result has 117 places, 159 transitions, 1676 flow [2024-06-21 21:33:26,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1676, PETRI_PLACES=117, PETRI_TRANSITIONS=159} [2024-06-21 21:33:26,211 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 76 predicate places. [2024-06-21 21:33:26,211 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 159 transitions, 1676 flow [2024-06-21 21:33:26,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:26,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:26,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:26,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:33:26,212 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)] === [2024-06-21 21:33:26,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:26,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1999957608, now seen corresponding path program 2 times [2024-06-21 21:33:26,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:26,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318318923] [2024-06-21 21:33:26,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:26,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:26,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:27,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:27,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318318923] [2024-06-21 21:33:27,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318318923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:27,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:27,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:27,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666971752] [2024-06-21 21:33:27,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:27,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:27,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:27,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:27,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:27,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:27,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 159 transitions, 1676 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:27,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:27,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:27,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:27,932 INFO L124 PetriNetUnfolderBase]: 2025/3031 cut-off events. [2024-06-21 21:33:27,933 INFO L125 PetriNetUnfolderBase]: For 59728/59728 co-relation queries the response was YES. [2024-06-21 21:33:27,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18148 conditions, 3031 events. 2025/3031 cut-off events. For 59728/59728 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 14018 event pairs, 470 based on Foata normal form. 4/3033 useless extension candidates. Maximal degree in co-relation 18093. Up to 2818 conditions per place. [2024-06-21 21:33:27,953 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 138 selfloop transitions, 48 changer transitions 0/189 dead transitions. [2024-06-21 21:33:27,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 189 transitions, 2176 flow [2024-06-21 21:33:27,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:27,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 21:33:27,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-21 21:33:27,955 INFO L175 Difference]: Start difference. First operand has 117 places, 159 transitions, 1676 flow. Second operand 8 states and 131 transitions. [2024-06-21 21:33:27,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 189 transitions, 2176 flow [2024-06-21 21:33:28,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 189 transitions, 2056 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 21:33:28,006 INFO L231 Difference]: Finished difference. Result has 120 places, 161 transitions, 1702 flow [2024-06-21 21:33:28,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1556, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1702, PETRI_PLACES=120, PETRI_TRANSITIONS=161} [2024-06-21 21:33:28,006 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-21 21:33:28,006 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 161 transitions, 1702 flow [2024-06-21 21:33:28,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:28,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:28,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:28,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:33:28,007 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)] === [2024-06-21 21:33:28,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:28,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1235979108, now seen corresponding path program 1 times [2024-06-21 21:33:28,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:28,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065794232] [2024-06-21 21:33:28,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:28,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:28,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:28,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065794232] [2024-06-21 21:33:28,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065794232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:28,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:28,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:28,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91667654] [2024-06-21 21:33:28,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:28,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:28,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:28,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:28,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:28,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:28,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 161 transitions, 1702 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:28,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:28,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:28,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:29,389 INFO L124 PetriNetUnfolderBase]: 2047/3060 cut-off events. [2024-06-21 21:33:29,389 INFO L125 PetriNetUnfolderBase]: For 64909/64921 co-relation queries the response was YES. [2024-06-21 21:33:29,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18655 conditions, 3060 events. 2047/3060 cut-off events. For 64909/64921 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 14144 event pairs, 468 based on Foata normal form. 12/3062 useless extension candidates. Maximal degree in co-relation 18599. Up to 2814 conditions per place. [2024-06-21 21:33:29,409 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 141 selfloop transitions, 49 changer transitions 0/193 dead transitions. [2024-06-21 21:33:29,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 193 transitions, 2233 flow [2024-06-21 21:33:29,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:29,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:29,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 21:33:29,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-21 21:33:29,410 INFO L175 Difference]: Start difference. First operand has 120 places, 161 transitions, 1702 flow. Second operand 8 states and 131 transitions. [2024-06-21 21:33:29,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 193 transitions, 2233 flow [2024-06-21 21:33:29,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 193 transitions, 2115 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:29,454 INFO L231 Difference]: Finished difference. Result has 122 places, 164 transitions, 1741 flow [2024-06-21 21:33:29,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1741, PETRI_PLACES=122, PETRI_TRANSITIONS=164} [2024-06-21 21:33:29,455 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-21 21:33:29,455 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 164 transitions, 1741 flow [2024-06-21 21:33:29,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:29,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:29,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:29,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:33:29,455 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)] === [2024-06-21 21:33:29,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1881864968, now seen corresponding path program 2 times [2024-06-21 21:33:29,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:29,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071411861] [2024-06-21 21:33:29,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:29,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:30,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:30,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071411861] [2024-06-21 21:33:30,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071411861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:30,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:30,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:33:30,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618013532] [2024-06-21 21:33:30,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:30,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:33:30,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:30,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:33:30,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:33:30,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:30,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 164 transitions, 1741 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-21 21:33:30,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:30,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:30,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:30,744 INFO L124 PetriNetUnfolderBase]: 2037/3047 cut-off events. [2024-06-21 21:33:30,744 INFO L125 PetriNetUnfolderBase]: For 68466/68472 co-relation queries the response was YES. [2024-06-21 21:33:30,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18713 conditions, 3047 events. 2037/3047 cut-off events. For 68466/68472 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 14075 event pairs, 467 based on Foata normal form. 8/3041 useless extension candidates. Maximal degree in co-relation 18656. Up to 2507 conditions per place. [2024-06-21 21:33:30,764 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 91 selfloop transitions, 95 changer transitions 0/189 dead transitions. [2024-06-21 21:33:30,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 189 transitions, 2211 flow [2024-06-21 21:33:30,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:33:30,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:33:30,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:33:30,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-21 21:33:30,766 INFO L175 Difference]: Start difference. First operand has 122 places, 164 transitions, 1741 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:33:30,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 189 transitions, 2211 flow [2024-06-21 21:33:30,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 189 transitions, 2081 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:30,837 INFO L231 Difference]: Finished difference. Result has 125 places, 168 transitions, 1939 flow [2024-06-21 21:33:30,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1939, PETRI_PLACES=125, PETRI_TRANSITIONS=168} [2024-06-21 21:33:30,837 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2024-06-21 21:33:30,838 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 168 transitions, 1939 flow [2024-06-21 21:33:30,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-21 21:33:30,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:30,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:30,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:33:30,838 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)] === [2024-06-21 21:33:30,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:30,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1881869928, now seen corresponding path program 3 times [2024-06-21 21:33:30,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:30,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825532995] [2024-06-21 21:33:30,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:30,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:31,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:31,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825532995] [2024-06-21 21:33:31,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825532995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:31,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:31,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:31,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670638738] [2024-06-21 21:33:31,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:31,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:31,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:31,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:31,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:31,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:31,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 168 transitions, 1939 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:31,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:31,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:31,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:32,436 INFO L124 PetriNetUnfolderBase]: 2054/3070 cut-off events. [2024-06-21 21:33:32,436 INFO L125 PetriNetUnfolderBase]: For 74279/74279 co-relation queries the response was YES. [2024-06-21 21:33:32,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19652 conditions, 3070 events. 2054/3070 cut-off events. For 74279/74279 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 14181 event pairs, 459 based on Foata normal form. 4/3072 useless extension candidates. Maximal degree in co-relation 19592. Up to 2843 conditions per place. [2024-06-21 21:33:32,457 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 140 selfloop transitions, 54 changer transitions 0/197 dead transitions. [2024-06-21 21:33:32,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 197 transitions, 2457 flow [2024-06-21 21:33:32,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:32,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 21:33:32,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-21 21:33:32,459 INFO L175 Difference]: Start difference. First operand has 125 places, 168 transitions, 1939 flow. Second operand 8 states and 131 transitions. [2024-06-21 21:33:32,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 197 transitions, 2457 flow [2024-06-21 21:33:32,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 197 transitions, 2251 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 21:33:32,527 INFO L231 Difference]: Finished difference. Result has 128 places, 170 transitions, 1890 flow [2024-06-21 21:33:32,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1733, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1890, PETRI_PLACES=128, PETRI_TRANSITIONS=170} [2024-06-21 21:33:32,528 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-21 21:33:32,528 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 170 transitions, 1890 flow [2024-06-21 21:33:32,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:32,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:32,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:32,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:33:32,529 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:32,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:32,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1286642512, now seen corresponding path program 1 times [2024-06-21 21:33:32,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:32,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048517604] [2024-06-21 21:33:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:32,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:33,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:33,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048517604] [2024-06-21 21:33:33,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048517604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:33,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:33,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:33:33,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143716374] [2024-06-21 21:33:33,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:33,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:33:33,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:33,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:33:33,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:33:33,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:33,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 170 transitions, 1890 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:33,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:33,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:33,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:33,701 INFO L124 PetriNetUnfolderBase]: 2059/3079 cut-off events. [2024-06-21 21:33:33,701 INFO L125 PetriNetUnfolderBase]: For 73884/73884 co-relation queries the response was YES. [2024-06-21 21:33:33,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19621 conditions, 3079 events. 2059/3079 cut-off events. For 73884/73884 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 14275 event pairs, 518 based on Foata normal form. 1/3078 useless extension candidates. Maximal degree in co-relation 19560. Up to 3025 conditions per place. [2024-06-21 21:33:33,722 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 170 selfloop transitions, 20 changer transitions 0/193 dead transitions. [2024-06-21 21:33:33,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 193 transitions, 2430 flow [2024-06-21 21:33:33,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:33:33,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:33:33,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-21 21:33:33,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-21 21:33:33,724 INFO L175 Difference]: Start difference. First operand has 128 places, 170 transitions, 1890 flow. Second operand 6 states and 97 transitions. [2024-06-21 21:33:33,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 193 transitions, 2430 flow [2024-06-21 21:33:33,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 193 transitions, 2291 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:33,801 INFO L231 Difference]: Finished difference. Result has 129 places, 179 transitions, 1882 flow [2024-06-21 21:33:33,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1751, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1882, PETRI_PLACES=129, PETRI_TRANSITIONS=179} [2024-06-21 21:33:33,802 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 88 predicate places. [2024-06-21 21:33:33,802 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 179 transitions, 1882 flow [2024-06-21 21:33:33,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:33,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:33,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:33,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:33:33,803 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)] === [2024-06-21 21:33:33,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:33,803 INFO L85 PathProgramCache]: Analyzing trace with hash -720414824, now seen corresponding path program 4 times [2024-06-21 21:33:33,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:33,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001478439] [2024-06-21 21:33:33,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:33,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:34,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:34,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001478439] [2024-06-21 21:33:34,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001478439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:34,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:34,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:34,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658357159] [2024-06-21 21:33:34,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:34,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:34,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:34,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:34,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:34,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:34,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 179 transitions, 1882 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:34,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:34,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:34,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:35,508 INFO L124 PetriNetUnfolderBase]: 2143/3221 cut-off events. [2024-06-21 21:33:35,508 INFO L125 PetriNetUnfolderBase]: For 87072/87078 co-relation queries the response was YES. [2024-06-21 21:33:35,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20440 conditions, 3221 events. 2143/3221 cut-off events. For 87072/87078 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15112 event pairs, 497 based on Foata normal form. 32/3239 useless extension candidates. Maximal degree in co-relation 20377. Up to 2446 conditions per place. [2024-06-21 21:33:35,527 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 120 selfloop transitions, 91 changer transitions 0/214 dead transitions. [2024-06-21 21:33:35,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 214 transitions, 2576 flow [2024-06-21 21:33:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:35,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:35,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:33:35,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-21 21:33:35,528 INFO L175 Difference]: Start difference. First operand has 129 places, 179 transitions, 1882 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:33:35,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 214 transitions, 2576 flow [2024-06-21 21:33:35,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 214 transitions, 2554 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-21 21:33:35,594 INFO L231 Difference]: Finished difference. Result has 136 places, 182 transitions, 2116 flow [2024-06-21 21:33:35,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2116, PETRI_PLACES=136, PETRI_TRANSITIONS=182} [2024-06-21 21:33:35,594 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 95 predicate places. [2024-06-21 21:33:35,594 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 182 transitions, 2116 flow [2024-06-21 21:33:35,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:35,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:35,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:35,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:33:35,595 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)] === [2024-06-21 21:33:35,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:35,596 INFO L85 PathProgramCache]: Analyzing trace with hash 720398110, now seen corresponding path program 3 times [2024-06-21 21:33:35,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:35,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880222426] [2024-06-21 21:33:35,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:35,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:36,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:36,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880222426] [2024-06-21 21:33:36,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880222426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:36,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:36,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:36,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441107058] [2024-06-21 21:33:36,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:36,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:36,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:36,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:36,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:36,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:36,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 182 transitions, 2116 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:36,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:36,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:36,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:37,154 INFO L124 PetriNetUnfolderBase]: 2133/3207 cut-off events. [2024-06-21 21:33:37,154 INFO L125 PetriNetUnfolderBase]: For 86410/86416 co-relation queries the response was YES. [2024-06-21 21:33:37,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21177 conditions, 3207 events. 2133/3207 cut-off events. For 86410/86416 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15034 event pairs, 497 based on Foata normal form. 8/3201 useless extension candidates. Maximal degree in co-relation 21111. Up to 2594 conditions per place. [2024-06-21 21:33:37,179 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 116 selfloop transitions, 88 changer transitions 0/207 dead transitions. [2024-06-21 21:33:37,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 207 transitions, 2612 flow [2024-06-21 21:33:37,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:37,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:37,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:33:37,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-21 21:33:37,181 INFO L175 Difference]: Start difference. First operand has 136 places, 182 transitions, 2116 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:33:37,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 207 transitions, 2612 flow [2024-06-21 21:33:37,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 207 transitions, 2384 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:37,270 INFO L231 Difference]: Finished difference. Result has 138 places, 182 transitions, 2072 flow [2024-06-21 21:33:37,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2072, PETRI_PLACES=138, PETRI_TRANSITIONS=182} [2024-06-21 21:33:37,271 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-21 21:33:37,271 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 182 transitions, 2072 flow [2024-06-21 21:33:37,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:37,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:37,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:37,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:33:37,272 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)] === [2024-06-21 21:33:37,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:37,273 INFO L85 PathProgramCache]: Analyzing trace with hash -492328976, now seen corresponding path program 1 times [2024-06-21 21:33:37,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:37,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677009047] [2024-06-21 21:33:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:37,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:38,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:38,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677009047] [2024-06-21 21:33:38,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677009047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:38,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:38,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:38,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175039212] [2024-06-21 21:33:38,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:38,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:38,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:38,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:38,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:38,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:38,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 182 transitions, 2072 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:38,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:38,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:38,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:38,640 INFO L124 PetriNetUnfolderBase]: 2161/3250 cut-off events. [2024-06-21 21:33:38,641 INFO L125 PetriNetUnfolderBase]: For 90494/90500 co-relation queries the response was YES. [2024-06-21 21:33:38,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21297 conditions, 3250 events. 2161/3250 cut-off events. For 90494/90500 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15310 event pairs, 538 based on Foata normal form. 8/3252 useless extension candidates. Maximal degree in co-relation 21230. Up to 3106 conditions per place. [2024-06-21 21:33:38,664 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 177 selfloop transitions, 30 changer transitions 0/210 dead transitions. [2024-06-21 21:33:38,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 210 transitions, 2633 flow [2024-06-21 21:33:38,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:38,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 21:33:38,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 21:33:38,665 INFO L175 Difference]: Start difference. First operand has 138 places, 182 transitions, 2072 flow. Second operand 8 states and 127 transitions. [2024-06-21 21:33:38,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 210 transitions, 2633 flow [2024-06-21 21:33:38,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 210 transitions, 2433 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:33:38,753 INFO L231 Difference]: Finished difference. Result has 140 places, 187 transitions, 2022 flow [2024-06-21 21:33:38,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1881, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2022, PETRI_PLACES=140, PETRI_TRANSITIONS=187} [2024-06-21 21:33:38,754 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-21 21:33:38,754 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 187 transitions, 2022 flow [2024-06-21 21:33:38,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:38,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:38,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:38,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:33:38,755 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)] === [2024-06-21 21:33:38,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:38,755 INFO L85 PathProgramCache]: Analyzing trace with hash -484054766, now seen corresponding path program 2 times [2024-06-21 21:33:38,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:38,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612327123] [2024-06-21 21:33:38,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:38,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:39,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:39,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612327123] [2024-06-21 21:33:39,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612327123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:39,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:39,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:39,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296228310] [2024-06-21 21:33:39,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:39,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:39,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:39,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:39,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:39,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:39,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 187 transitions, 2022 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:39,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:39,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:39,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:40,193 INFO L124 PetriNetUnfolderBase]: 2178/3277 cut-off events. [2024-06-21 21:33:40,193 INFO L125 PetriNetUnfolderBase]: For 96449/96455 co-relation queries the response was YES. [2024-06-21 21:33:40,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21558 conditions, 3277 events. 2178/3277 cut-off events. For 96449/96455 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15438 event pairs, 543 based on Foata normal form. 8/3279 useless extension candidates. Maximal degree in co-relation 21489. Up to 3088 conditions per place. [2024-06-21 21:33:40,218 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 174 selfloop transitions, 39 changer transitions 0/216 dead transitions. [2024-06-21 21:33:40,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 216 transitions, 2584 flow [2024-06-21 21:33:40,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:33:40,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:33:40,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 21:33:40,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-06-21 21:33:40,219 INFO L175 Difference]: Start difference. First operand has 140 places, 187 transitions, 2022 flow. Second operand 9 states and 142 transitions. [2024-06-21 21:33:40,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 216 transitions, 2584 flow [2024-06-21 21:33:40,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 216 transitions, 2495 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 21:33:40,307 INFO L231 Difference]: Finished difference. Result has 144 places, 189 transitions, 2069 flow [2024-06-21 21:33:40,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1933, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2069, PETRI_PLACES=144, PETRI_TRANSITIONS=189} [2024-06-21 21:33:40,307 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-21 21:33:40,308 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 189 transitions, 2069 flow [2024-06-21 21:33:40,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:40,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:40,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:40,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:33:40,308 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)] === [2024-06-21 21:33:40,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:40,308 INFO L85 PathProgramCache]: Analyzing trace with hash -483758096, now seen corresponding path program 3 times [2024-06-21 21:33:40,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:40,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965040463] [2024-06-21 21:33:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:40,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:41,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:41,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965040463] [2024-06-21 21:33:41,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965040463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:41,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:41,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:41,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259986618] [2024-06-21 21:33:41,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:41,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:41,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:41,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:41,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:41,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:41,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 189 transitions, 2069 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:41,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:41,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:41,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:41,706 INFO L124 PetriNetUnfolderBase]: 2170/3265 cut-off events. [2024-06-21 21:33:41,706 INFO L125 PetriNetUnfolderBase]: For 100867/100873 co-relation queries the response was YES. [2024-06-21 21:33:41,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21687 conditions, 3265 events. 2170/3265 cut-off events. For 100867/100873 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15465 event pairs, 506 based on Foata normal form. 8/3267 useless extension candidates. Maximal degree in co-relation 21617. Up to 3017 conditions per place. [2024-06-21 21:33:41,728 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 172 selfloop transitions, 40 changer transitions 0/215 dead transitions. [2024-06-21 21:33:41,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 215 transitions, 2621 flow [2024-06-21 21:33:41,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:41,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:41,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 21:33:41,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:33:41,730 INFO L175 Difference]: Start difference. First operand has 144 places, 189 transitions, 2069 flow. Second operand 8 states and 128 transitions. [2024-06-21 21:33:41,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 215 transitions, 2621 flow [2024-06-21 21:33:41,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 215 transitions, 2501 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 21:33:41,814 INFO L231 Difference]: Finished difference. Result has 145 places, 191 transitions, 2088 flow [2024-06-21 21:33:41,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1953, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2088, PETRI_PLACES=145, PETRI_TRANSITIONS=191} [2024-06-21 21:33:41,814 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-21 21:33:41,814 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 191 transitions, 2088 flow [2024-06-21 21:33:41,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:41,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:41,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:41,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:33:41,815 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:41,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:41,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1275214672, now seen corresponding path program 2 times [2024-06-21 21:33:41,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:41,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759175101] [2024-06-21 21:33:41,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:41,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:42,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:42,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759175101] [2024-06-21 21:33:42,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759175101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:42,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:42,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:33:42,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849213381] [2024-06-21 21:33:42,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:42,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:33:42,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:42,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:33:42,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:33:42,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:42,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 191 transitions, 2088 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:42,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:42,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:42,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:42,906 INFO L124 PetriNetUnfolderBase]: 2177/3273 cut-off events. [2024-06-21 21:33:42,907 INFO L125 PetriNetUnfolderBase]: For 98993/98993 co-relation queries the response was YES. [2024-06-21 21:33:42,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21648 conditions, 3273 events. 2177/3273 cut-off events. For 98993/98993 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15478 event pairs, 539 based on Foata normal form. 3/3274 useless extension candidates. Maximal degree in co-relation 21577. Up to 3211 conditions per place. [2024-06-21 21:33:42,931 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 180 selfloop transitions, 24 changer transitions 0/207 dead transitions. [2024-06-21 21:33:42,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 207 transitions, 2576 flow [2024-06-21 21:33:42,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:33:42,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:33:42,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-21 21:33:42,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2024-06-21 21:33:42,932 INFO L175 Difference]: Start difference. First operand has 145 places, 191 transitions, 2088 flow. Second operand 5 states and 89 transitions. [2024-06-21 21:33:42,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 207 transitions, 2576 flow [2024-06-21 21:33:43,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 207 transitions, 2449 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:43,033 INFO L231 Difference]: Finished difference. Result has 144 places, 194 transitions, 2070 flow [2024-06-21 21:33:43,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1961, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2070, PETRI_PLACES=144, PETRI_TRANSITIONS=194} [2024-06-21 21:33:43,033 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-21 21:33:43,034 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 194 transitions, 2070 flow [2024-06-21 21:33:43,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:43,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:43,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:43,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:33:43,034 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)] === [2024-06-21 21:33:43,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:43,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1364048324, now seen corresponding path program 1 times [2024-06-21 21:33:43,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:43,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968353555] [2024-06-21 21:33:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:43,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:43,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:43,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968353555] [2024-06-21 21:33:43,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968353555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:43,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:43,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:43,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28660733] [2024-06-21 21:33:43,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:43,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:43,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:43,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:43,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:44,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:44,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 194 transitions, 2070 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:44,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:44,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:44,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:44,758 INFO L124 PetriNetUnfolderBase]: 2229/3358 cut-off events. [2024-06-21 21:33:44,759 INFO L125 PetriNetUnfolderBase]: For 104932/104944 co-relation queries the response was YES. [2024-06-21 21:33:44,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22267 conditions, 3358 events. 2229/3358 cut-off events. For 104932/104944 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 15994 event pairs, 509 based on Foata normal form. 12/3361 useless extension candidates. Maximal degree in co-relation 22195. Up to 3185 conditions per place. [2024-06-21 21:33:44,786 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 191 selfloop transitions, 35 changer transitions 0/229 dead transitions. [2024-06-21 21:33:44,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 229 transitions, 2700 flow [2024-06-21 21:33:44,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:33:44,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:33:44,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 21:33:44,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 21:33:44,788 INFO L175 Difference]: Start difference. First operand has 144 places, 194 transitions, 2070 flow. Second operand 9 states and 140 transitions. [2024-06-21 21:33:44,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 229 transitions, 2700 flow [2024-06-21 21:33:44,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 229 transitions, 2648 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 21:33:44,889 INFO L231 Difference]: Finished difference. Result has 152 places, 200 transitions, 2181 flow [2024-06-21 21:33:44,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2019, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2181, PETRI_PLACES=152, PETRI_TRANSITIONS=200} [2024-06-21 21:33:44,890 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-21 21:33:44,890 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 200 transitions, 2181 flow [2024-06-21 21:33:44,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:44,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:44,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:44,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:33:44,890 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)] === [2024-06-21 21:33:44,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:44,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1881354458, now seen corresponding path program 2 times [2024-06-21 21:33:44,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:44,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152357919] [2024-06-21 21:33:44,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:44,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:45,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:45,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152357919] [2024-06-21 21:33:45,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152357919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:45,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:45,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:45,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86090423] [2024-06-21 21:33:45,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:45,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:45,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:45,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:45,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:45,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:45,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 200 transitions, 2181 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:45,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:45,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:45,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:46,326 INFO L124 PetriNetUnfolderBase]: 2314/3502 cut-off events. [2024-06-21 21:33:46,326 INFO L125 PetriNetUnfolderBase]: For 113422/113432 co-relation queries the response was YES. [2024-06-21 21:33:46,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23444 conditions, 3502 events. 2314/3502 cut-off events. For 113422/113432 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17043 event pairs, 503 based on Foata normal form. 12/3508 useless extension candidates. Maximal degree in co-relation 23369. Up to 3287 conditions per place. [2024-06-21 21:33:46,354 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 201 selfloop transitions, 41 changer transitions 0/245 dead transitions. [2024-06-21 21:33:46,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 245 transitions, 2938 flow [2024-06-21 21:33:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:33:46,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:33:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 21:33:46,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-21 21:33:46,355 INFO L175 Difference]: Start difference. First operand has 152 places, 200 transitions, 2181 flow. Second operand 9 states and 145 transitions. [2024-06-21 21:33:46,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 245 transitions, 2938 flow [2024-06-21 21:33:46,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 245 transitions, 2786 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-21 21:33:46,474 INFO L231 Difference]: Finished difference. Result has 158 places, 212 transitions, 2321 flow [2024-06-21 21:33:46,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2077, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2321, PETRI_PLACES=158, PETRI_TRANSITIONS=212} [2024-06-21 21:33:46,474 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-21 21:33:46,474 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 212 transitions, 2321 flow [2024-06-21 21:33:46,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:46,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:46,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:46,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:33:46,475 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)] === [2024-06-21 21:33:46,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:46,475 INFO L85 PathProgramCache]: Analyzing trace with hash -799619320, now seen corresponding path program 3 times [2024-06-21 21:33:46,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:46,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111823960] [2024-06-21 21:33:46,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:46,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:47,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:47,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:47,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111823960] [2024-06-21 21:33:47,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111823960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:47,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:47,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:47,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057913948] [2024-06-21 21:33:47,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:47,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:47,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:47,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:47,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:47,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:47,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 212 transitions, 2321 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:47,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:47,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:47,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:48,121 INFO L124 PetriNetUnfolderBase]: 2331/3529 cut-off events. [2024-06-21 21:33:48,122 INFO L125 PetriNetUnfolderBase]: For 121192/121198 co-relation queries the response was YES. [2024-06-21 21:33:48,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23956 conditions, 3529 events. 2331/3529 cut-off events. For 121192/121198 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 17181 event pairs, 521 based on Foata normal form. 8/3531 useless extension candidates. Maximal degree in co-relation 23878. Up to 3228 conditions per place. [2024-06-21 21:33:48,156 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 173 selfloop transitions, 65 changer transitions 0/241 dead transitions. [2024-06-21 21:33:48,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 241 transitions, 2945 flow [2024-06-21 21:33:48,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:48,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:48,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 21:33:48,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 21:33:48,158 INFO L175 Difference]: Start difference. First operand has 158 places, 212 transitions, 2321 flow. Second operand 8 states and 130 transitions. [2024-06-21 21:33:48,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 241 transitions, 2945 flow [2024-06-21 21:33:48,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 241 transitions, 2837 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 21:33:48,279 INFO L231 Difference]: Finished difference. Result has 161 places, 214 transitions, 2415 flow [2024-06-21 21:33:48,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2415, PETRI_PLACES=161, PETRI_TRANSITIONS=214} [2024-06-21 21:33:48,279 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-06-21 21:33:48,280 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 214 transitions, 2415 flow [2024-06-21 21:33:48,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:48,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:48,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:48,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:33:48,280 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:48,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:48,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1786025156, now seen corresponding path program 4 times [2024-06-21 21:33:48,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:48,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230609422] [2024-06-21 21:33:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:48,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:49,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:49,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230609422] [2024-06-21 21:33:49,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230609422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:49,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:49,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:49,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925434002] [2024-06-21 21:33:49,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:49,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:49,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:49,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:49,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:49,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:49,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 214 transitions, 2415 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:49,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:49,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:49,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:49,931 INFO L124 PetriNetUnfolderBase]: 2382/3607 cut-off events. [2024-06-21 21:33:49,931 INFO L125 PetriNetUnfolderBase]: For 130575/130590 co-relation queries the response was YES. [2024-06-21 21:33:49,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24885 conditions, 3607 events. 2382/3607 cut-off events. For 130575/130590 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17702 event pairs, 515 based on Foata normal form. 14/3612 useless extension candidates. Maximal degree in co-relation 24806. Up to 3326 conditions per place. [2024-06-21 21:33:49,963 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 190 selfloop transitions, 55 changer transitions 0/248 dead transitions. [2024-06-21 21:33:49,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 248 transitions, 3144 flow [2024-06-21 21:33:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:33:49,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:33:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 21:33:49,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-06-21 21:33:49,964 INFO L175 Difference]: Start difference. First operand has 161 places, 214 transitions, 2415 flow. Second operand 9 states and 142 transitions. [2024-06-21 21:33:49,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 248 transitions, 3144 flow [2024-06-21 21:33:50,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 248 transitions, 2916 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:50,095 INFO L231 Difference]: Finished difference. Result has 165 places, 220 transitions, 2458 flow [2024-06-21 21:33:50,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2458, PETRI_PLACES=165, PETRI_TRANSITIONS=220} [2024-06-21 21:33:50,096 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-21 21:33:50,096 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 220 transitions, 2458 flow [2024-06-21 21:33:50,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:50,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:50,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:50,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:33:50,097 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:50,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:50,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1879480508, now seen corresponding path program 5 times [2024-06-21 21:33:50,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:50,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871746371] [2024-06-21 21:33:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:50,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:50,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:50,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871746371] [2024-06-21 21:33:50,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871746371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:50,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:50,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:50,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217725186] [2024-06-21 21:33:50,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:50,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:50,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:50,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:50,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:51,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:51,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 220 transitions, 2458 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:51,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:51,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:51,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:51,773 INFO L124 PetriNetUnfolderBase]: 2432/3688 cut-off events. [2024-06-21 21:33:51,773 INFO L125 PetriNetUnfolderBase]: For 138902/138908 co-relation queries the response was YES. [2024-06-21 21:33:51,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25508 conditions, 3688 events. 2432/3688 cut-off events. For 138902/138908 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 18211 event pairs, 530 based on Foata normal form. 8/3690 useless extension candidates. Maximal degree in co-relation 25427. Up to 3377 conditions per place. [2024-06-21 21:33:51,799 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 196 selfloop transitions, 61 changer transitions 0/260 dead transitions. [2024-06-21 21:33:51,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 260 transitions, 3238 flow [2024-06-21 21:33:51,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:33:51,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:33:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 21:33:51,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 21:33:51,801 INFO L175 Difference]: Start difference. First operand has 165 places, 220 transitions, 2458 flow. Second operand 9 states and 147 transitions. [2024-06-21 21:33:51,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 260 transitions, 3238 flow [2024-06-21 21:33:51,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 260 transitions, 3026 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:51,919 INFO L231 Difference]: Finished difference. Result has 169 places, 228 transitions, 2569 flow [2024-06-21 21:33:51,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2307, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2569, PETRI_PLACES=169, PETRI_TRANSITIONS=228} [2024-06-21 21:33:51,919 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-21 21:33:51,920 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 228 transitions, 2569 flow [2024-06-21 21:33:51,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:51,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:51,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:51,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:33:51,920 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:51,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:51,920 INFO L85 PathProgramCache]: Analyzing trace with hash -712777408, now seen corresponding path program 1 times [2024-06-21 21:33:51,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:51,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017523057] [2024-06-21 21:33:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:51,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:52,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:52,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017523057] [2024-06-21 21:33:52,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017523057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:52,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:52,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:52,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729828670] [2024-06-21 21:33:52,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:52,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:52,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:52,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:52,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:52,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:52,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 228 transitions, 2569 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:52,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:52,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:52,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:53,603 INFO L124 PetriNetUnfolderBase]: 2552/3881 cut-off events. [2024-06-21 21:33:53,603 INFO L125 PetriNetUnfolderBase]: For 158501/158525 co-relation queries the response was YES. [2024-06-21 21:33:53,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26737 conditions, 3881 events. 2552/3881 cut-off events. For 158501/158525 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19534 event pairs, 506 based on Foata normal form. 36/3907 useless extension candidates. Maximal degree in co-relation 26654. Up to 3463 conditions per place. [2024-06-21 21:33:53,634 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 214 selfloop transitions, 56 changer transitions 0/273 dead transitions. [2024-06-21 21:33:53,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 273 transitions, 3351 flow [2024-06-21 21:33:53,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:33:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:33:53,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 21:33:53,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-21 21:33:53,635 INFO L175 Difference]: Start difference. First operand has 169 places, 228 transitions, 2569 flow. Second operand 9 states and 149 transitions. [2024-06-21 21:33:53,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 273 transitions, 3351 flow [2024-06-21 21:33:53,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 273 transitions, 3187 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:53,799 INFO L231 Difference]: Finished difference. Result has 172 places, 235 transitions, 2643 flow [2024-06-21 21:33:53,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2413, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2643, PETRI_PLACES=172, PETRI_TRANSITIONS=235} [2024-06-21 21:33:53,800 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-21 21:33:53,800 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 235 transitions, 2643 flow [2024-06-21 21:33:53,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:53,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:53,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:53,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:33:53,801 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:53,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:53,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1428146804, now seen corresponding path program 2 times [2024-06-21 21:33:53,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:53,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262039348] [2024-06-21 21:33:53,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:53,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:54,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:54,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262039348] [2024-06-21 21:33:54,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262039348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:54,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:54,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:54,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702819241] [2024-06-21 21:33:54,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:54,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:54,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:54,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:54,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:54,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:54,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 235 transitions, 2643 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:54,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:54,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:54,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:55,471 INFO L124 PetriNetUnfolderBase]: 2746/4200 cut-off events. [2024-06-21 21:33:55,471 INFO L125 PetriNetUnfolderBase]: For 185751/185769 co-relation queries the response was YES. [2024-06-21 21:33:55,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29881 conditions, 4200 events. 2746/4200 cut-off events. For 185751/185769 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 21646 event pairs, 480 based on Foata normal form. 28/4214 useless extension candidates. Maximal degree in co-relation 29797. Up to 3020 conditions per place. [2024-06-21 21:33:55,507 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 166 selfloop transitions, 109 changer transitions 0/278 dead transitions. [2024-06-21 21:33:55,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 278 transitions, 3593 flow [2024-06-21 21:33:55,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:33:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:33:55,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 21:33:55,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:33:55,509 INFO L175 Difference]: Start difference. First operand has 172 places, 235 transitions, 2643 flow. Second operand 9 states and 160 transitions. [2024-06-21 21:33:55,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 278 transitions, 3593 flow [2024-06-21 21:33:55,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 278 transitions, 3467 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 21:33:55,688 INFO L231 Difference]: Finished difference. Result has 174 places, 237 transitions, 2827 flow [2024-06-21 21:33:55,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2827, PETRI_PLACES=174, PETRI_TRANSITIONS=237} [2024-06-21 21:33:55,689 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-21 21:33:55,689 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 237 transitions, 2827 flow [2024-06-21 21:33:55,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:55,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:55,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:55,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:33:55,689 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:55,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:55,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1428154244, now seen corresponding path program 3 times [2024-06-21 21:33:55,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:55,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189237600] [2024-06-21 21:33:55,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:55,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:56,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:56,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189237600] [2024-06-21 21:33:56,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189237600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:56,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:56,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:56,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792372229] [2024-06-21 21:33:56,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:56,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:56,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:56,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:56,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:56,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:56,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 237 transitions, 2827 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:56,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:56,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:56,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:57,413 INFO L124 PetriNetUnfolderBase]: 2838/4352 cut-off events. [2024-06-21 21:33:57,413 INFO L125 PetriNetUnfolderBase]: For 204140/204158 co-relation queries the response was YES. [2024-06-21 21:33:57,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31285 conditions, 4352 events. 2838/4352 cut-off events. For 204140/204158 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22869 event pairs, 572 based on Foata normal form. 36/4374 useless extension candidates. Maximal degree in co-relation 31200. Up to 3650 conditions per place. [2024-06-21 21:33:57,451 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 175 selfloop transitions, 101 changer transitions 0/279 dead transitions. [2024-06-21 21:33:57,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 279 transitions, 3599 flow [2024-06-21 21:33:57,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:33:57,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:33:57,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 21:33:57,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 21:33:57,452 INFO L175 Difference]: Start difference. First operand has 174 places, 237 transitions, 2827 flow. Second operand 10 states and 170 transitions. [2024-06-21 21:33:57,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 279 transitions, 3599 flow [2024-06-21 21:33:57,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 279 transitions, 3416 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 21:33:57,695 INFO L231 Difference]: Finished difference. Result has 179 places, 239 transitions, 2931 flow [2024-06-21 21:33:57,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2644, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2931, PETRI_PLACES=179, PETRI_TRANSITIONS=239} [2024-06-21 21:33:57,696 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-21 21:33:57,696 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 239 transitions, 2931 flow [2024-06-21 21:33:57,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:57,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:57,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:57,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:33:57,696 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:57,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:57,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1433868536, now seen corresponding path program 6 times [2024-06-21 21:33:57,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:57,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041245323] [2024-06-21 21:33:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:57,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:58,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:58,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041245323] [2024-06-21 21:33:58,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041245323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:58,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:58,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:58,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410594560] [2024-06-21 21:33:58,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:58,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:58,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:58,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:58,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:58,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:58,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 239 transitions, 2931 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:58,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:58,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:58,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:59,495 INFO L124 PetriNetUnfolderBase]: 2830/4340 cut-off events. [2024-06-21 21:33:59,496 INFO L125 PetriNetUnfolderBase]: For 195490/195508 co-relation queries the response was YES. [2024-06-21 21:33:59,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31405 conditions, 4340 events. 2830/4340 cut-off events. For 195490/195508 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22760 event pairs, 597 based on Foata normal form. 16/4342 useless extension candidates. Maximal degree in co-relation 31319. Up to 3694 conditions per place. [2024-06-21 21:33:59,530 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 168 selfloop transitions, 96 changer transitions 0/267 dead transitions. [2024-06-21 21:33:59,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 267 transitions, 3625 flow [2024-06-21 21:33:59,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:59,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:59,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 21:33:59,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 21:33:59,531 INFO L175 Difference]: Start difference. First operand has 179 places, 239 transitions, 2931 flow. Second operand 8 states and 135 transitions. [2024-06-21 21:33:59,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 267 transitions, 3625 flow [2024-06-21 21:33:59,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 267 transitions, 3312 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-21 21:33:59,760 INFO L231 Difference]: Finished difference. Result has 178 places, 241 transitions, 2897 flow [2024-06-21 21:33:59,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2618, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2897, PETRI_PLACES=178, PETRI_TRANSITIONS=241} [2024-06-21 21:33:59,761 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-21 21:33:59,761 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 241 transitions, 2897 flow [2024-06-21 21:33:59,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:59,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:59,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:59,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:33:59,762 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:59,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:59,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1433718434, now seen corresponding path program 4 times [2024-06-21 21:33:59,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:59,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839916533] [2024-06-21 21:33:59,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:59,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:00,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:00,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839916533] [2024-06-21 21:34:00,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839916533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:00,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:00,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:00,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616443938] [2024-06-21 21:34:00,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:00,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:00,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:00,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:00,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:00,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:00,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 241 transitions, 2897 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-21 21:34:00,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:00,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:00,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:01,328 INFO L124 PetriNetUnfolderBase]: 2855/4387 cut-off events. [2024-06-21 21:34:01,328 INFO L125 PetriNetUnfolderBase]: For 208419/208437 co-relation queries the response was YES. [2024-06-21 21:34:01,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31091 conditions, 4387 events. 2855/4387 cut-off events. For 208419/208437 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 23183 event pairs, 504 based on Foata normal form. 32/4405 useless extension candidates. Maximal degree in co-relation 31004. Up to 3565 conditions per place. [2024-06-21 21:34:01,370 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 169 selfloop transitions, 100 changer transitions 0/272 dead transitions. [2024-06-21 21:34:01,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 272 transitions, 3595 flow [2024-06-21 21:34:01,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:34:01,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:34:01,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 21:34:01,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 21:34:01,371 INFO L175 Difference]: Start difference. First operand has 178 places, 241 transitions, 2897 flow. Second operand 8 states and 141 transitions. [2024-06-21 21:34:01,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 272 transitions, 3595 flow [2024-06-21 21:34:01,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 272 transitions, 3336 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 21:34:01,592 INFO L231 Difference]: Finished difference. Result has 180 places, 242 transitions, 2902 flow [2024-06-21 21:34:01,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2638, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2902, PETRI_PLACES=180, PETRI_TRANSITIONS=242} [2024-06-21 21:34:01,592 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-21 21:34:01,592 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 242 transitions, 2902 flow [2024-06-21 21:34:01,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-21 21:34:01,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:01,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:01,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:34:01,593 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:01,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:01,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1433872256, now seen corresponding path program 7 times [2024-06-21 21:34:01,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:01,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15867697] [2024-06-21 21:34:01,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:01,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:01,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:02,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:02,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15867697] [2024-06-21 21:34:02,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15867697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:02,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:02,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:02,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870018510] [2024-06-21 21:34:02,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:02,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:02,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:02,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:02,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:02,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:02,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 242 transitions, 2902 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:02,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:02,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:02,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:03,385 INFO L124 PetriNetUnfolderBase]: 2872/4414 cut-off events. [2024-06-21 21:34:03,385 INFO L125 PetriNetUnfolderBase]: For 205473/205491 co-relation queries the response was YES. [2024-06-21 21:34:03,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31536 conditions, 4414 events. 2872/4414 cut-off events. For 205473/205491 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 23325 event pairs, 600 based on Foata normal form. 16/4416 useless extension candidates. Maximal degree in co-relation 31448. Up to 3423 conditions per place. [2024-06-21 21:34:03,423 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 168 selfloop transitions, 103 changer transitions 0/274 dead transitions. [2024-06-21 21:34:03,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 274 transitions, 3630 flow [2024-06-21 21:34:03,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:34:03,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:34:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:34:03,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 21:34:03,424 INFO L175 Difference]: Start difference. First operand has 180 places, 242 transitions, 2902 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:34:03,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 274 transitions, 3630 flow [2024-06-21 21:34:03,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 274 transitions, 3406 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 21:34:03,709 INFO L231 Difference]: Finished difference. Result has 182 places, 244 transitions, 2972 flow [2024-06-21 21:34:03,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2678, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2972, PETRI_PLACES=182, PETRI_TRANSITIONS=244} [2024-06-21 21:34:03,710 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-21 21:34:03,710 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 244 transitions, 2972 flow [2024-06-21 21:34:03,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:03,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:03,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:03,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:34:03,711 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)] === [2024-06-21 21:34:03,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:03,711 INFO L85 PathProgramCache]: Analyzing trace with hash 45464380, now seen corresponding path program 1 times [2024-06-21 21:34:03,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:03,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943514685] [2024-06-21 21:34:03,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:03,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:04,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:04,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943514685] [2024-06-21 21:34:04,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943514685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:04,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:04,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:34:04,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983621836] [2024-06-21 21:34:04,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:04,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:34:04,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:04,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:34:04,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:34:04,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:04,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 244 transitions, 2972 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:04,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:04,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:04,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:05,169 INFO L124 PetriNetUnfolderBase]: 2882/4432 cut-off events. [2024-06-21 21:34:05,170 INFO L125 PetriNetUnfolderBase]: For 210532/210532 co-relation queries the response was YES. [2024-06-21 21:34:05,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31692 conditions, 4432 events. 2882/4432 cut-off events. For 210532/210532 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 23600 event pairs, 741 based on Foata normal form. 2/4432 useless extension candidates. Maximal degree in co-relation 31603. Up to 4281 conditions per place. [2024-06-21 21:34:05,205 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 229 selfloop transitions, 40 changer transitions 0/272 dead transitions. [2024-06-21 21:34:05,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 272 transitions, 3720 flow [2024-06-21 21:34:05,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:34:05,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:34:05,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 21:34:05,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-21 21:34:05,210 INFO L175 Difference]: Start difference. First operand has 182 places, 244 transitions, 2972 flow. Second operand 7 states and 117 transitions. [2024-06-21 21:34:05,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 272 transitions, 3720 flow [2024-06-21 21:34:05,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 272 transitions, 3446 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 21:34:05,437 INFO L231 Difference]: Finished difference. Result has 183 places, 250 transitions, 2851 flow [2024-06-21 21:34:05,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2698, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2851, PETRI_PLACES=183, PETRI_TRANSITIONS=250} [2024-06-21 21:34:05,438 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 142 predicate places. [2024-06-21 21:34:05,438 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 250 transitions, 2851 flow [2024-06-21 21:34:05,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:05,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:05,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:05,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:34:05,439 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)] === [2024-06-21 21:34:05,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:05,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1426878366, now seen corresponding path program 2 times [2024-06-21 21:34:05,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:05,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216801210] [2024-06-21 21:34:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:05,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:05,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:05,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216801210] [2024-06-21 21:34:05,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216801210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:05,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:05,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:34:05,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653552065] [2024-06-21 21:34:05,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:05,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:34:05,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:05,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:34:05,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:34:06,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:06,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 250 transitions, 2851 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:06,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:06,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:06,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:06,902 INFO L124 PetriNetUnfolderBase]: 2892/4438 cut-off events. [2024-06-21 21:34:06,902 INFO L125 PetriNetUnfolderBase]: For 216198/216204 co-relation queries the response was YES. [2024-06-21 21:34:06,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31662 conditions, 4438 events. 2892/4438 cut-off events. For 216198/216204 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 23503 event pairs, 639 based on Foata normal form. 8/4444 useless extension candidates. Maximal degree in co-relation 31572. Up to 4291 conditions per place. [2024-06-21 21:34:06,945 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 227 selfloop transitions, 41 changer transitions 0/271 dead transitions. [2024-06-21 21:34:06,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 271 transitions, 3563 flow [2024-06-21 21:34:06,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:34:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:34:06,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 21:34:06,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 21:34:06,946 INFO L175 Difference]: Start difference. First operand has 183 places, 250 transitions, 2851 flow. Second operand 7 states and 113 transitions. [2024-06-21 21:34:06,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 271 transitions, 3563 flow [2024-06-21 21:34:07,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 271 transitions, 3512 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 21:34:07,306 INFO L231 Difference]: Finished difference. Result has 187 places, 253 transitions, 2922 flow [2024-06-21 21:34:07,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2804, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2922, PETRI_PLACES=187, PETRI_TRANSITIONS=253} [2024-06-21 21:34:07,307 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 146 predicate places. [2024-06-21 21:34:07,307 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 253 transitions, 2922 flow [2024-06-21 21:34:07,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:07,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:07,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:07,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:34:07,308 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)] === [2024-06-21 21:34:07,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:07,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1231211354, now seen corresponding path program 1 times [2024-06-21 21:34:07,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:07,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384241422] [2024-06-21 21:34:07,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:07,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:07,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:07,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384241422] [2024-06-21 21:34:07,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384241422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:07,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:07,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:34:07,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907380202] [2024-06-21 21:34:07,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:07,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:34:07,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:07,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:34:07,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:34:07,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:07,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 253 transitions, 2922 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:07,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:07,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:07,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:08,668 INFO L124 PetriNetUnfolderBase]: 2902/4456 cut-off events. [2024-06-21 21:34:08,668 INFO L125 PetriNetUnfolderBase]: For 224892/224892 co-relation queries the response was YES. [2024-06-21 21:34:08,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32037 conditions, 4456 events. 2902/4456 cut-off events. For 224892/224892 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 23687 event pairs, 762 based on Foata normal form. 2/4456 useless extension candidates. Maximal degree in co-relation 31945. Up to 4366 conditions per place. [2024-06-21 21:34:08,709 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 241 selfloop transitions, 32 changer transitions 0/276 dead transitions. [2024-06-21 21:34:08,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 276 transitions, 3696 flow [2024-06-21 21:34:08,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:34:08,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:34:08,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 21:34:08,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 21:34:08,710 INFO L175 Difference]: Start difference. First operand has 187 places, 253 transitions, 2922 flow. Second operand 7 states and 113 transitions. [2024-06-21 21:34:08,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 276 transitions, 3696 flow [2024-06-21 21:34:08,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 276 transitions, 3627 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 21:34:08,931 INFO L231 Difference]: Finished difference. Result has 190 places, 259 transitions, 3017 flow [2024-06-21 21:34:08,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2853, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3017, PETRI_PLACES=190, PETRI_TRANSITIONS=259} [2024-06-21 21:34:08,932 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-21 21:34:08,932 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 259 transitions, 3017 flow [2024-06-21 21:34:08,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:08,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:08,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:08,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:34:08,933 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:08,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:08,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1642045422, now seen corresponding path program 8 times [2024-06-21 21:34:08,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:08,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586719563] [2024-06-21 21:34:08,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:08,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:09,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:09,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586719563] [2024-06-21 21:34:09,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586719563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:09,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:09,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:09,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049319180] [2024-06-21 21:34:09,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:09,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:09,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:09,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:09,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:09,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:09,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 259 transitions, 3017 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:09,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:09,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:09,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:10,732 INFO L124 PetriNetUnfolderBase]: 2960/4554 cut-off events. [2024-06-21 21:34:10,732 INFO L125 PetriNetUnfolderBase]: For 233452/233464 co-relation queries the response was YES. [2024-06-21 21:34:10,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32574 conditions, 4554 events. 2960/4554 cut-off events. For 233452/233464 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 24257 event pairs, 555 based on Foata normal form. 14/4562 useless extension candidates. Maximal degree in co-relation 32481. Up to 4247 conditions per place. [2024-06-21 21:34:10,778 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 250 selfloop transitions, 53 changer transitions 0/306 dead transitions. [2024-06-21 21:34:10,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 306 transitions, 3911 flow [2024-06-21 21:34:10,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:34:10,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:34:10,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 21:34:10,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-21 21:34:10,779 INFO L175 Difference]: Start difference. First operand has 190 places, 259 transitions, 3017 flow. Second operand 9 states and 143 transitions. [2024-06-21 21:34:10,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 306 transitions, 3911 flow [2024-06-21 21:34:11,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 306 transitions, 3854 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 21:34:11,009 INFO L231 Difference]: Finished difference. Result has 198 places, 274 transitions, 3308 flow [2024-06-21 21:34:11,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2960, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3308, PETRI_PLACES=198, PETRI_TRANSITIONS=274} [2024-06-21 21:34:11,009 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2024-06-21 21:34:11,010 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 274 transitions, 3308 flow [2024-06-21 21:34:11,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:11,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:11,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:11,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:34:11,010 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:11,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:11,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1917463150, now seen corresponding path program 5 times [2024-06-21 21:34:11,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:11,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596810590] [2024-06-21 21:34:11,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:11,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:11,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:11,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596810590] [2024-06-21 21:34:11,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596810590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:11,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:11,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:11,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794336837] [2024-06-21 21:34:11,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:11,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:11,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:11,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:11,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:11,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:11,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 274 transitions, 3308 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-21 21:34:11,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:11,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:11,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:12,634 INFO L124 PetriNetUnfolderBase]: 3035/4675 cut-off events. [2024-06-21 21:34:12,634 INFO L125 PetriNetUnfolderBase]: For 264931/264943 co-relation queries the response was YES. [2024-06-21 21:34:12,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34227 conditions, 4675 events. 3035/4675 cut-off events. For 264931/264943 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 25176 event pairs, 669 based on Foata normal form. 28/4689 useless extension candidates. Maximal degree in co-relation 34130. Up to 4058 conditions per place. [2024-06-21 21:34:12,679 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 217 selfloop transitions, 85 changer transitions 0/305 dead transitions. [2024-06-21 21:34:12,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 305 transitions, 4084 flow [2024-06-21 21:34:12,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:34:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:34:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:34:12,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 21:34:12,680 INFO L175 Difference]: Start difference. First operand has 198 places, 274 transitions, 3308 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:34:12,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 305 transitions, 4084 flow [2024-06-21 21:34:12,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 305 transitions, 3901 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 21:34:12,961 INFO L231 Difference]: Finished difference. Result has 199 places, 275 transitions, 3355 flow [2024-06-21 21:34:12,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3125, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3355, PETRI_PLACES=199, PETRI_TRANSITIONS=275} [2024-06-21 21:34:12,962 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 158 predicate places. [2024-06-21 21:34:12,962 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 275 transitions, 3355 flow [2024-06-21 21:34:12,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-21 21:34:12,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:12,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:12,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:34:12,963 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:12,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:12,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1917672400, now seen corresponding path program 6 times [2024-06-21 21:34:12,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:12,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500431055] [2024-06-21 21:34:12,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:12,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:13,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:13,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500431055] [2024-06-21 21:34:13,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500431055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:13,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:13,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:13,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236488672] [2024-06-21 21:34:13,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:13,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:13,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:13,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:13,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:13,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:13,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 275 transitions, 3355 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:13,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:13,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:13,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:14,811 INFO L124 PetriNetUnfolderBase]: 3251/5033 cut-off events. [2024-06-21 21:34:14,812 INFO L125 PetriNetUnfolderBase]: For 289093/289105 co-relation queries the response was YES. [2024-06-21 21:34:14,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36980 conditions, 5033 events. 3251/5033 cut-off events. For 289093/289105 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27715 event pairs, 713 based on Foata normal form. 24/5043 useless extension candidates. Maximal degree in co-relation 36883. Up to 4055 conditions per place. [2024-06-21 21:34:14,856 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 227 selfloop transitions, 91 changer transitions 0/321 dead transitions. [2024-06-21 21:34:14,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 321 transitions, 4469 flow [2024-06-21 21:34:14,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:34:14,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:34:14,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 21:34:14,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-21 21:34:14,858 INFO L175 Difference]: Start difference. First operand has 199 places, 275 transitions, 3355 flow. Second operand 9 states and 159 transitions. [2024-06-21 21:34:14,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 321 transitions, 4469 flow [2024-06-21 21:34:15,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 321 transitions, 4236 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 21:34:15,204 INFO L231 Difference]: Finished difference. Result has 204 places, 281 transitions, 3482 flow [2024-06-21 21:34:15,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3122, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3482, PETRI_PLACES=204, PETRI_TRANSITIONS=281} [2024-06-21 21:34:15,205 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-21 21:34:15,205 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 281 transitions, 3482 flow [2024-06-21 21:34:15,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:15,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:15,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:15,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:34:15,206 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:15,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:15,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1778333618, now seen corresponding path program 7 times [2024-06-21 21:34:15,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:15,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916189592] [2024-06-21 21:34:15,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:15,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:15,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:15,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916189592] [2024-06-21 21:34:15,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916189592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:15,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:15,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:15,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845546137] [2024-06-21 21:34:15,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:15,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:15,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:15,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:15,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:15,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:15,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 281 transitions, 3482 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-21 21:34:15,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:15,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:15,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:16,897 INFO L124 PetriNetUnfolderBase]: 3309/5131 cut-off events. [2024-06-21 21:34:16,897 INFO L125 PetriNetUnfolderBase]: For 301156/301168 co-relation queries the response was YES. [2024-06-21 21:34:16,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37847 conditions, 5131 events. 3309/5131 cut-off events. For 301156/301168 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 28411 event pairs, 703 based on Foata normal form. 24/5141 useless extension candidates. Maximal degree in co-relation 37747. Up to 3775 conditions per place. [2024-06-21 21:34:16,941 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 213 selfloop transitions, 101 changer transitions 0/317 dead transitions. [2024-06-21 21:34:16,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 317 transitions, 4484 flow [2024-06-21 21:34:16,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:34:16,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:34:16,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:34:16,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-21 21:34:16,942 INFO L175 Difference]: Start difference. First operand has 204 places, 281 transitions, 3482 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:34:16,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 317 transitions, 4484 flow [2024-06-21 21:34:17,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 317 transitions, 4346 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 21:34:17,271 INFO L231 Difference]: Finished difference. Result has 208 places, 282 transitions, 3608 flow [2024-06-21 21:34:17,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3344, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3608, PETRI_PLACES=208, PETRI_TRANSITIONS=282} [2024-06-21 21:34:17,271 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2024-06-21 21:34:17,271 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 282 transitions, 3608 flow [2024-06-21 21:34:17,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-21 21:34:17,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:17,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:17,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:34:17,272 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:17,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:17,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2111597616, now seen corresponding path program 8 times [2024-06-21 21:34:17,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:17,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63846880] [2024-06-21 21:34:17,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:17,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:17,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:17,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63846880] [2024-06-21 21:34:17,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63846880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:17,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:17,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:17,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877951040] [2024-06-21 21:34:17,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:17,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:17,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:17,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:17,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:17,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:17,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 282 transitions, 3608 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-21 21:34:17,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:17,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:17,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:18,855 INFO L124 PetriNetUnfolderBase]: 3378/5254 cut-off events. [2024-06-21 21:34:18,855 INFO L125 PetriNetUnfolderBase]: For 319423/319435 co-relation queries the response was YES. [2024-06-21 21:34:18,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39303 conditions, 5254 events. 3378/5254 cut-off events. For 319423/319435 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 29303 event pairs, 689 based on Foata normal form. 24/5264 useless extension candidates. Maximal degree in co-relation 39201. Up to 2720 conditions per place. [2024-06-21 21:34:18,910 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 197 selfloop transitions, 119 changer transitions 0/319 dead transitions. [2024-06-21 21:34:18,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 319 transitions, 4672 flow [2024-06-21 21:34:18,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:34:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:34:18,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 21:34:18,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-21 21:34:18,911 INFO L175 Difference]: Start difference. First operand has 208 places, 282 transitions, 3608 flow. Second operand 8 states and 142 transitions. [2024-06-21 21:34:18,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 319 transitions, 4672 flow [2024-06-21 21:34:19,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 319 transitions, 4424 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 21:34:19,330 INFO L231 Difference]: Finished difference. Result has 209 places, 284 transitions, 3718 flow [2024-06-21 21:34:19,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3364, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3718, PETRI_PLACES=209, PETRI_TRANSITIONS=284} [2024-06-21 21:34:19,331 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2024-06-21 21:34:19,331 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 284 transitions, 3718 flow [2024-06-21 21:34:19,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-21 21:34:19,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:19,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:19,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:34:19,332 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)] === [2024-06-21 21:34:19,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:19,332 INFO L85 PathProgramCache]: Analyzing trace with hash -876948314, now seen corresponding path program 2 times [2024-06-21 21:34:19,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:19,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33187783] [2024-06-21 21:34:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:19,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:19,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:19,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33187783] [2024-06-21 21:34:19,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33187783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:19,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:19,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:34:19,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927847811] [2024-06-21 21:34:19,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:19,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:34:19,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:19,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:34:19,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:34:19,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:19,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 284 transitions, 3718 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:19,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:19,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:19,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:20,887 INFO L124 PetriNetUnfolderBase]: 3372/5248 cut-off events. [2024-06-21 21:34:20,887 INFO L125 PetriNetUnfolderBase]: For 298570/298570 co-relation queries the response was YES. [2024-06-21 21:34:20,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39036 conditions, 5248 events. 3372/5248 cut-off events. For 298570/298570 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 29485 event pairs, 931 based on Foata normal form. 2/5248 useless extension candidates. Maximal degree in co-relation 38934. Up to 5166 conditions per place. [2024-06-21 21:34:20,944 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 269 selfloop transitions, 27 changer transitions 0/299 dead transitions. [2024-06-21 21:34:20,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 299 transitions, 4364 flow [2024-06-21 21:34:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:34:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:34:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 21:34:20,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-21 21:34:20,946 INFO L175 Difference]: Start difference. First operand has 209 places, 284 transitions, 3718 flow. Second operand 6 states and 101 transitions. [2024-06-21 21:34:20,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 299 transitions, 4364 flow [2024-06-21 21:34:21,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 299 transitions, 4198 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 21:34:21,372 INFO L231 Difference]: Finished difference. Result has 211 places, 284 transitions, 3612 flow [2024-06-21 21:34:21,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3552, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3612, PETRI_PLACES=211, PETRI_TRANSITIONS=284} [2024-06-21 21:34:21,373 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-21 21:34:21,373 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 284 transitions, 3612 flow [2024-06-21 21:34:21,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:21,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:21,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:21,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 21:34:21,373 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)] === [2024-06-21 21:34:21,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:21,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1495202226, now seen corresponding path program 3 times [2024-06-21 21:34:21,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:21,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149977040] [2024-06-21 21:34:21,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:21,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:21,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:21,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149977040] [2024-06-21 21:34:21,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149977040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:21,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:21,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:34:21,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053589267] [2024-06-21 21:34:21,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:21,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:34:21,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:21,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:34:21,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:34:21,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:21,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 284 transitions, 3612 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:21,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:21,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:21,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:22,868 INFO L124 PetriNetUnfolderBase]: 3386/5272 cut-off events. [2024-06-21 21:34:22,868 INFO L125 PetriNetUnfolderBase]: For 303087/303087 co-relation queries the response was YES. [2024-06-21 21:34:22,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38870 conditions, 5272 events. 3386/5272 cut-off events. For 303087/303087 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 29682 event pairs, 905 based on Foata normal form. 6/5276 useless extension candidates. Maximal degree in co-relation 38766. Up to 5111 conditions per place. [2024-06-21 21:34:22,922 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 259 selfloop transitions, 46 changer transitions 0/308 dead transitions. [2024-06-21 21:34:22,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 308 transitions, 4340 flow [2024-06-21 21:34:22,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:34:22,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:34:22,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 21:34:22,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 21:34:22,923 INFO L175 Difference]: Start difference. First operand has 211 places, 284 transitions, 3612 flow. Second operand 6 states and 110 transitions. [2024-06-21 21:34:22,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 308 transitions, 4340 flow [2024-06-21 21:34:23,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 308 transitions, 4243 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 21:34:23,268 INFO L231 Difference]: Finished difference. Result has 212 places, 287 transitions, 3682 flow [2024-06-21 21:34:23,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3515, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3682, PETRI_PLACES=212, PETRI_TRANSITIONS=287} [2024-06-21 21:34:23,269 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-21 21:34:23,269 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 287 transitions, 3682 flow [2024-06-21 21:34:23,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:23,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:23,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:23,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 21:34:23,269 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)] === [2024-06-21 21:34:23,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:23,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1054015478, now seen corresponding path program 1 times [2024-06-21 21:34:23,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:23,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141538246] [2024-06-21 21:34:23,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:23,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:23,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:23,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141538246] [2024-06-21 21:34:23,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141538246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:23,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:23,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:34:23,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686950947] [2024-06-21 21:34:23,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:23,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:34:23,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:23,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:34:23,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:34:23,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:23,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 287 transitions, 3682 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:23,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:23,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:23,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:24,767 INFO L124 PetriNetUnfolderBase]: 3404/5295 cut-off events. [2024-06-21 21:34:24,768 INFO L125 PetriNetUnfolderBase]: For 307455/307461 co-relation queries the response was YES. [2024-06-21 21:34:24,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39799 conditions, 5295 events. 3404/5295 cut-off events. For 307455/307461 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 29737 event pairs, 932 based on Foata normal form. 6/5295 useless extension candidates. Maximal degree in co-relation 39694. Up to 5110 conditions per place. [2024-06-21 21:34:24,819 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 274 selfloop transitions, 41 changer transitions 0/318 dead transitions. [2024-06-21 21:34:24,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 318 transitions, 4820 flow [2024-06-21 21:34:24,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:34:24,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:34:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 21:34:24,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 21:34:24,820 INFO L175 Difference]: Start difference. First operand has 212 places, 287 transitions, 3682 flow. Second operand 7 states and 115 transitions. [2024-06-21 21:34:24,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 318 transitions, 4820 flow [2024-06-21 21:34:25,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 318 transitions, 4733 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 21:34:25,181 INFO L231 Difference]: Finished difference. Result has 216 places, 300 transitions, 3960 flow [2024-06-21 21:34:25,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3595, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3960, PETRI_PLACES=216, PETRI_TRANSITIONS=300} [2024-06-21 21:34:25,181 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-21 21:34:25,181 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 300 transitions, 3960 flow [2024-06-21 21:34:25,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:25,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:25,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:25,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 21:34:25,182 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:25,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:25,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1962719444, now seen corresponding path program 2 times [2024-06-21 21:34:25,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:25,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734476392] [2024-06-21 21:34:25,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:25,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:25,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:25,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734476392] [2024-06-21 21:34:25,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734476392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:25,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:25,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:34:25,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057680709] [2024-06-21 21:34:25,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:25,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:34:25,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:25,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:34:25,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:34:25,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:25,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 300 transitions, 3960 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:25,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:25,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:25,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:26,745 INFO L124 PetriNetUnfolderBase]: 3503/5432 cut-off events. [2024-06-21 21:34:26,745 INFO L125 PetriNetUnfolderBase]: For 338183/338183 co-relation queries the response was YES. [2024-06-21 21:34:26,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42038 conditions, 5432 events. 3503/5432 cut-off events. For 338183/338183 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 30575 event pairs, 931 based on Foata normal form. 6/5436 useless extension candidates. Maximal degree in co-relation 41931. Up to 5304 conditions per place. [2024-06-21 21:34:26,920 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 301 selfloop transitions, 36 changer transitions 0/340 dead transitions. [2024-06-21 21:34:26,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 340 transitions, 5208 flow [2024-06-21 21:34:26,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:34:26,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:34:26,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 21:34:26,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 21:34:26,921 INFO L175 Difference]: Start difference. First operand has 216 places, 300 transitions, 3960 flow. Second operand 8 states and 127 transitions. [2024-06-21 21:34:26,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 340 transitions, 5208 flow [2024-06-21 21:34:27,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 340 transitions, 5063 flow, removed 64 selfloop flow, removed 2 redundant places. [2024-06-21 21:34:27,379 INFO L231 Difference]: Finished difference. Result has 223 places, 320 transitions, 4338 flow [2024-06-21 21:34:27,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3849, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4338, PETRI_PLACES=223, PETRI_TRANSITIONS=320} [2024-06-21 21:34:27,379 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 182 predicate places. [2024-06-21 21:34:27,380 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 320 transitions, 4338 flow [2024-06-21 21:34:27,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:27,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:27,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:27,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 21:34:27,380 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:27,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:27,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1380817142, now seen corresponding path program 3 times [2024-06-21 21:34:27,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:27,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537560348] [2024-06-21 21:34:27,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:27,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:27,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:27,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537560348] [2024-06-21 21:34:27,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537560348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:27,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:27,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:27,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237789394] [2024-06-21 21:34:27,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:27,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:27,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:27,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:27,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:28,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:28,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 320 transitions, 4338 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-21 21:34:28,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:28,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:28,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:29,007 INFO L124 PetriNetUnfolderBase]: 3589/5551 cut-off events. [2024-06-21 21:34:29,007 INFO L125 PetriNetUnfolderBase]: For 357282/357282 co-relation queries the response was YES. [2024-06-21 21:34:29,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44072 conditions, 5551 events. 3589/5551 cut-off events. For 357282/357282 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31252 event pairs, 945 based on Foata normal form. 6/5555 useless extension candidates. Maximal degree in co-relation 43962. Up to 5341 conditions per place. [2024-06-21 21:34:29,067 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 304 selfloop transitions, 57 changer transitions 0/364 dead transitions. [2024-06-21 21:34:29,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 364 transitions, 5654 flow [2024-06-21 21:34:29,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:34:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:34:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 21:34:29,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 21:34:29,069 INFO L175 Difference]: Start difference. First operand has 223 places, 320 transitions, 4338 flow. Second operand 7 states and 125 transitions. [2024-06-21 21:34:29,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 364 transitions, 5654 flow [2024-06-21 21:34:29,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 364 transitions, 5466 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-06-21 21:34:29,817 INFO L231 Difference]: Finished difference. Result has 229 places, 340 transitions, 4766 flow [2024-06-21 21:34:29,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4153, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4766, PETRI_PLACES=229, PETRI_TRANSITIONS=340} [2024-06-21 21:34:29,817 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-21 21:34:29,818 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 340 transitions, 4766 flow [2024-06-21 21:34:29,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-21 21:34:29,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:29,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:29,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 21:34:29,818 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:29,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:29,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1380570878, now seen corresponding path program 1 times [2024-06-21 21:34:29,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:29,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25455590] [2024-06-21 21:34:29,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:29,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:30,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:30,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25455590] [2024-06-21 21:34:30,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25455590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:30,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:30,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:30,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820659814] [2024-06-21 21:34:30,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:30,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:30,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:30,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:30,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:30,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:30,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 340 transitions, 4766 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:34:30,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:30,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:30,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:31,960 INFO L124 PetriNetUnfolderBase]: 3584/5545 cut-off events. [2024-06-21 21:34:31,960 INFO L125 PetriNetUnfolderBase]: For 364436/364436 co-relation queries the response was YES. [2024-06-21 21:34:32,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44676 conditions, 5545 events. 3584/5545 cut-off events. For 364436/364436 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31165 event pairs, 953 based on Foata normal form. 2/5545 useless extension candidates. Maximal degree in co-relation 44562. Up to 5493 conditions per place. [2024-06-21 21:34:32,025 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 334 selfloop transitions, 13 changer transitions 0/350 dead transitions. [2024-06-21 21:34:32,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 350 transitions, 5524 flow [2024-06-21 21:34:32,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:34:32,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:34:32,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-06-21 21:34:32,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:34:32,026 INFO L175 Difference]: Start difference. First operand has 229 places, 340 transitions, 4766 flow. Second operand 5 states and 80 transitions. [2024-06-21 21:34:32,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 350 transitions, 5524 flow [2024-06-21 21:34:32,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 350 transitions, 5358 flow, removed 78 selfloop flow, removed 2 redundant places. [2024-06-21 21:34:32,654 INFO L231 Difference]: Finished difference. Result has 232 places, 342 transitions, 4673 flow [2024-06-21 21:34:32,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4600, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4673, PETRI_PLACES=232, PETRI_TRANSITIONS=342} [2024-06-21 21:34:32,655 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-21 21:34:32,655 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 342 transitions, 4673 flow [2024-06-21 21:34:32,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:34:32,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:32,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:32,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 21:34:32,656 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)] === [2024-06-21 21:34:32,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:32,656 INFO L85 PathProgramCache]: Analyzing trace with hash -664173227, now seen corresponding path program 1 times [2024-06-21 21:34:32,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:32,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119670663] [2024-06-21 21:34:32,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:32,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:33,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:33,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119670663] [2024-06-21 21:34:33,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119670663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:33,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:33,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:33,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055347257] [2024-06-21 21:34:33,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:33,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:33,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:33,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:33,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:33,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:33,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 342 transitions, 4673 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:33,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:33,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:33,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:34,625 INFO L124 PetriNetUnfolderBase]: 3564/5508 cut-off events. [2024-06-21 21:34:34,625 INFO L125 PetriNetUnfolderBase]: For 370768/370780 co-relation queries the response was YES. [2024-06-21 21:34:34,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43779 conditions, 5508 events. 3564/5508 cut-off events. For 370768/370780 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 30557 event pairs, 603 based on Foata normal form. 20/5514 useless extension candidates. Maximal degree in co-relation 43663. Up to 4982 conditions per place. [2024-06-21 21:34:34,687 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 306 selfloop transitions, 61 changer transitions 0/370 dead transitions. [2024-06-21 21:34:34,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 370 transitions, 5509 flow [2024-06-21 21:34:34,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:34:34,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:34:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 21:34:34,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 21:34:34,689 INFO L175 Difference]: Start difference. First operand has 232 places, 342 transitions, 4673 flow. Second operand 8 states and 127 transitions. [2024-06-21 21:34:34,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 370 transitions, 5509 flow [2024-06-21 21:34:35,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 370 transitions, 5452 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 21:34:35,287 INFO L231 Difference]: Finished difference. Result has 237 places, 342 transitions, 4749 flow [2024-06-21 21:34:35,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4616, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4749, PETRI_PLACES=237, PETRI_TRANSITIONS=342} [2024-06-21 21:34:35,287 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-21 21:34:35,288 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 342 transitions, 4749 flow [2024-06-21 21:34:35,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:35,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:35,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:35,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 21:34:35,288 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)] === [2024-06-21 21:34:35,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:35,288 INFO L85 PathProgramCache]: Analyzing trace with hash 806789865, now seen corresponding path program 2 times [2024-06-21 21:34:35,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:35,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993750074] [2024-06-21 21:34:35,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:35,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:36,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:36,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993750074] [2024-06-21 21:34:36,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993750074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:36,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:36,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:34:36,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479119347] [2024-06-21 21:34:36,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:36,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:34:36,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:36,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:34:36,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:34:36,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:36,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 342 transitions, 4749 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:36,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:36,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:36,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:37,652 INFO L124 PetriNetUnfolderBase]: 3605/5585 cut-off events. [2024-06-21 21:34:37,653 INFO L125 PetriNetUnfolderBase]: For 385875/385881 co-relation queries the response was YES. [2024-06-21 21:34:37,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44721 conditions, 5585 events. 3605/5585 cut-off events. For 385875/385881 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 31473 event pairs, 802 based on Foata normal form. 16/5595 useless extension candidates. Maximal degree in co-relation 44604. Up to 5022 conditions per place. [2024-06-21 21:34:37,716 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 292 selfloop transitions, 82 changer transitions 0/377 dead transitions. [2024-06-21 21:34:37,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 377 transitions, 5677 flow [2024-06-21 21:34:37,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:34:37,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:34:37,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 21:34:37,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-06-21 21:34:37,717 INFO L175 Difference]: Start difference. First operand has 237 places, 342 transitions, 4749 flow. Second operand 9 states and 146 transitions. [2024-06-21 21:34:37,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 377 transitions, 5677 flow [2024-06-21 21:34:38,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 377 transitions, 5439 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 21:34:38,396 INFO L231 Difference]: Finished difference. Result has 239 places, 343 transitions, 4739 flow [2024-06-21 21:34:38,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4512, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4739, PETRI_PLACES=239, PETRI_TRANSITIONS=343} [2024-06-21 21:34:38,397 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-21 21:34:38,397 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 343 transitions, 4739 flow [2024-06-21 21:34:38,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:38,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:38,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:38,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 21:34:38,398 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)] === [2024-06-21 21:34:38,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:38,398 INFO L85 PathProgramCache]: Analyzing trace with hash -2108711569, now seen corresponding path program 3 times [2024-06-21 21:34:38,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:38,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600242972] [2024-06-21 21:34:38,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:38,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:39,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:39,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600242972] [2024-06-21 21:34:39,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600242972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:39,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:39,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:39,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322602990] [2024-06-21 21:34:39,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:39,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:39,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:39,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:39,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:39,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:39,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 343 transitions, 4739 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:39,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:39,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:39,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:40,594 INFO L124 PetriNetUnfolderBase]: 3585/5549 cut-off events. [2024-06-21 21:34:40,594 INFO L125 PetriNetUnfolderBase]: For 385137/385143 co-relation queries the response was YES. [2024-06-21 21:34:40,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43517 conditions, 5549 events. 3585/5549 cut-off events. For 385137/385143 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31109 event pairs, 760 based on Foata normal form. 16/5551 useless extension candidates. Maximal degree in co-relation 43400. Up to 4843 conditions per place. [2024-06-21 21:34:40,656 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 267 selfloop transitions, 102 changer transitions 0/372 dead transitions. [2024-06-21 21:34:40,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 372 transitions, 5600 flow [2024-06-21 21:34:40,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:34:40,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:34:40,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 21:34:40,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 21:34:40,657 INFO L175 Difference]: Start difference. First operand has 239 places, 343 transitions, 4739 flow. Second operand 8 states and 134 transitions. [2024-06-21 21:34:40,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 372 transitions, 5600 flow [2024-06-21 21:34:41,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 372 transitions, 5372 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 21:34:41,326 INFO L231 Difference]: Finished difference. Result has 241 places, 344 transitions, 4771 flow [2024-06-21 21:34:41,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4511, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4771, PETRI_PLACES=241, PETRI_TRANSITIONS=344} [2024-06-21 21:34:41,326 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-21 21:34:41,326 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 344 transitions, 4771 flow [2024-06-21 21:34:41,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:41,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:41,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:41,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 21:34:41,327 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:41,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:41,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1324067057, now seen corresponding path program 1 times [2024-06-21 21:34:41,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:41,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013110114] [2024-06-21 21:34:41,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:41,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:41,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:41,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013110114] [2024-06-21 21:34:41,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013110114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:41,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:41,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:34:41,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435000865] [2024-06-21 21:34:41,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:41,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:34:41,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:41,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:34:41,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:34:41,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:41,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 344 transitions, 4771 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:41,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:41,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:41,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:42,900 INFO L124 PetriNetUnfolderBase]: 3606/5580 cut-off events. [2024-06-21 21:34:42,901 INFO L125 PetriNetUnfolderBase]: For 380567/380567 co-relation queries the response was YES. [2024-06-21 21:34:42,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44004 conditions, 5580 events. 3606/5580 cut-off events. For 380567/380567 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 31422 event pairs, 927 based on Foata normal form. 1/5579 useless extension candidates. Maximal degree in co-relation 43885. Up to 5482 conditions per place. [2024-06-21 21:34:42,967 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 335 selfloop transitions, 33 changer transitions 0/371 dead transitions. [2024-06-21 21:34:42,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 371 transitions, 5862 flow [2024-06-21 21:34:42,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:34:42,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:34:42,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 21:34:42,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:34:42,969 INFO L175 Difference]: Start difference. First operand has 241 places, 344 transitions, 4771 flow. Second operand 7 states and 112 transitions. [2024-06-21 21:34:42,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 371 transitions, 5862 flow [2024-06-21 21:34:43,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 371 transitions, 5633 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 21:34:43,717 INFO L231 Difference]: Finished difference. Result has 243 places, 353 transitions, 4820 flow [2024-06-21 21:34:43,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4542, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4820, PETRI_PLACES=243, PETRI_TRANSITIONS=353} [2024-06-21 21:34:43,718 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 202 predicate places. [2024-06-21 21:34:43,718 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 353 transitions, 4820 flow [2024-06-21 21:34:43,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:43,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:43,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:43,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 21:34:43,718 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)] === [2024-06-21 21:34:43,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:43,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1487255449, now seen corresponding path program 2 times [2024-06-21 21:34:43,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:43,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943196568] [2024-06-21 21:34:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:43,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:44,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:44,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943196568] [2024-06-21 21:34:44,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943196568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:44,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:44,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:34:44,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356416911] [2024-06-21 21:34:44,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:44,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:34:44,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:44,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:34:44,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:34:44,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:44,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 353 transitions, 4820 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:44,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:44,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:44,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:45,301 INFO L124 PetriNetUnfolderBase]: 3603/5576 cut-off events. [2024-06-21 21:34:45,301 INFO L125 PetriNetUnfolderBase]: For 387548/387548 co-relation queries the response was YES. [2024-06-21 21:34:45,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43667 conditions, 5576 events. 3603/5576 cut-off events. For 387548/387548 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 31462 event pairs, 927 based on Foata normal form. 1/5575 useless extension candidates. Maximal degree in co-relation 43546. Up to 5506 conditions per place. [2024-06-21 21:34:45,368 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 341 selfloop transitions, 23 changer transitions 0/367 dead transitions. [2024-06-21 21:34:45,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 367 transitions, 5596 flow [2024-06-21 21:34:45,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:34:45,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:34:45,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-21 21:34:45,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821428571428571 [2024-06-21 21:34:45,369 INFO L175 Difference]: Start difference. First operand has 243 places, 353 transitions, 4820 flow. Second operand 7 states and 107 transitions. [2024-06-21 21:34:45,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 367 transitions, 5596 flow [2024-06-21 21:34:45,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 367 transitions, 5521 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 21:34:45,937 INFO L231 Difference]: Finished difference. Result has 247 places, 353 transitions, 4797 flow [2024-06-21 21:34:45,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4745, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4797, PETRI_PLACES=247, PETRI_TRANSITIONS=353} [2024-06-21 21:34:45,937 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-21 21:34:45,937 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 353 transitions, 4797 flow [2024-06-21 21:34:45,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:45,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:45,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:45,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 21:34:45,938 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)] === [2024-06-21 21:34:45,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:45,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1076705569, now seen corresponding path program 4 times [2024-06-21 21:34:45,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:45,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64465394] [2024-06-21 21:34:45,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:45,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:46,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:46,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64465394] [2024-06-21 21:34:46,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64465394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:46,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:46,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:46,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477406776] [2024-06-21 21:34:46,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:46,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:46,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:46,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:46,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:47,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:47,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 353 transitions, 4797 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:34:47,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:47,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:47,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:48,190 INFO L124 PetriNetUnfolderBase]: 3583/5542 cut-off events. [2024-06-21 21:34:48,190 INFO L125 PetriNetUnfolderBase]: For 397813/397819 co-relation queries the response was YES. [2024-06-21 21:34:48,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43008 conditions, 5542 events. 3583/5542 cut-off events. For 397813/397819 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30994 event pairs, 589 based on Foata normal form. 16/5544 useless extension candidates. Maximal degree in co-relation 42885. Up to 3783 conditions per place. [2024-06-21 21:34:48,258 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 258 selfloop transitions, 131 changer transitions 0/392 dead transitions. [2024-06-21 21:34:48,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 392 transitions, 5863 flow [2024-06-21 21:34:48,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:34:48,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:34:48,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 21:34:48,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 21:34:48,260 INFO L175 Difference]: Start difference. First operand has 247 places, 353 transitions, 4797 flow. Second operand 9 states and 156 transitions. [2024-06-21 21:34:48,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 392 transitions, 5863 flow [2024-06-21 21:34:48,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 392 transitions, 5785 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 21:34:48,955 INFO L231 Difference]: Finished difference. Result has 252 places, 354 transitions, 5067 flow [2024-06-21 21:34:48,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4719, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5067, PETRI_PLACES=252, PETRI_TRANSITIONS=354} [2024-06-21 21:34:48,955 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 211 predicate places. [2024-06-21 21:34:48,956 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 354 transitions, 5067 flow [2024-06-21 21:34:48,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:34:48,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:48,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:48,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 21:34:48,956 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:48,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:48,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1447827024, now seen corresponding path program 1 times [2024-06-21 21:34:48,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:48,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929585447] [2024-06-21 21:34:48,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:48,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:49,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:49,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929585447] [2024-06-21 21:34:49,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929585447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:49,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:49,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:49,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422735628] [2024-06-21 21:34:49,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:49,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:49,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:49,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:49,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:49,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:49,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 354 transitions, 5067 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:49,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:49,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:49,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:50,859 INFO L124 PetriNetUnfolderBase]: 3603/5576 cut-off events. [2024-06-21 21:34:50,860 INFO L125 PetriNetUnfolderBase]: For 402873/402873 co-relation queries the response was YES. [2024-06-21 21:34:50,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44341 conditions, 5576 events. 3603/5576 cut-off events. For 402873/402873 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31420 event pairs, 888 based on Foata normal form. 4/5578 useless extension candidates. Maximal degree in co-relation 44216. Up to 5324 conditions per place. [2024-06-21 21:34:50,923 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 321 selfloop transitions, 63 changer transitions 0/387 dead transitions. [2024-06-21 21:34:50,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 387 transitions, 6161 flow [2024-06-21 21:34:50,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:34:50,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:34:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 21:34:50,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 21:34:50,924 INFO L175 Difference]: Start difference. First operand has 252 places, 354 transitions, 5067 flow. Second operand 8 states and 136 transitions. [2024-06-21 21:34:50,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 387 transitions, 6161 flow [2024-06-21 21:34:51,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 387 transitions, 5779 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 21:34:51,742 INFO L231 Difference]: Finished difference. Result has 252 places, 360 transitions, 4929 flow [2024-06-21 21:34:51,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4687, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4929, PETRI_PLACES=252, PETRI_TRANSITIONS=360} [2024-06-21 21:34:51,743 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 211 predicate places. [2024-06-21 21:34:51,743 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 360 transitions, 4929 flow [2024-06-21 21:34:51,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:51,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:51,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:51,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 21:34:51,743 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:51,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:51,743 INFO L85 PathProgramCache]: Analyzing trace with hash 631956328, now seen corresponding path program 2 times [2024-06-21 21:34:51,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:51,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321883617] [2024-06-21 21:34:51,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:51,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:52,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:52,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321883617] [2024-06-21 21:34:52,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321883617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:52,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:52,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:52,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416855905] [2024-06-21 21:34:52,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:52,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:52,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:52,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:52,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:52,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:52,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 360 transitions, 4929 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:52,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:52,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:52,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:53,683 INFO L124 PetriNetUnfolderBase]: 3655/5638 cut-off events. [2024-06-21 21:34:53,683 INFO L125 PetriNetUnfolderBase]: For 406183/406185 co-relation queries the response was YES. [2024-06-21 21:34:53,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44332 conditions, 5638 events. 3655/5638 cut-off events. For 406183/406185 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 31639 event pairs, 801 based on Foata normal form. 6/5642 useless extension candidates. Maximal degree in co-relation 44207. Up to 5364 conditions per place. [2024-06-21 21:34:53,756 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 322 selfloop transitions, 65 changer transitions 0/390 dead transitions. [2024-06-21 21:34:53,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 390 transitions, 6147 flow [2024-06-21 21:34:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:34:53,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:34:53,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 21:34:53,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-21 21:34:53,757 INFO L175 Difference]: Start difference. First operand has 252 places, 360 transitions, 4929 flow. Second operand 8 states and 133 transitions. [2024-06-21 21:34:53,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 390 transitions, 6147 flow [2024-06-21 21:34:54,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 390 transitions, 6026 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 21:34:54,537 INFO L231 Difference]: Finished difference. Result has 256 places, 366 transitions, 5060 flow [2024-06-21 21:34:54,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4828, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5060, PETRI_PLACES=256, PETRI_TRANSITIONS=366} [2024-06-21 21:34:54,537 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-21 21:34:54,537 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 366 transitions, 5060 flow [2024-06-21 21:34:54,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:54,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:54,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:54,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 21:34:54,538 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:54,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:54,538 INFO L85 PathProgramCache]: Analyzing trace with hash 487143012, now seen corresponding path program 3 times [2024-06-21 21:34:54,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:54,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601748754] [2024-06-21 21:34:54,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:54,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:55,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:55,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601748754] [2024-06-21 21:34:55,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601748754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:55,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:55,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:55,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663240774] [2024-06-21 21:34:55,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:55,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:55,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:55,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:55,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:55,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:55,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 366 transitions, 5060 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:55,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:55,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:55,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:56,566 INFO L124 PetriNetUnfolderBase]: 3643/5622 cut-off events. [2024-06-21 21:34:56,566 INFO L125 PetriNetUnfolderBase]: For 410458/410460 co-relation queries the response was YES. [2024-06-21 21:34:56,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44167 conditions, 5622 events. 3643/5622 cut-off events. For 410458/410460 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31526 event pairs, 797 based on Foata normal form. 6/5626 useless extension candidates. Maximal degree in co-relation 44040. Up to 5356 conditions per place. [2024-06-21 21:34:56,630 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 323 selfloop transitions, 64 changer transitions 0/390 dead transitions. [2024-06-21 21:34:56,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 390 transitions, 6048 flow [2024-06-21 21:34:56,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:34:56,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:34:56,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 21:34:56,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 21:34:56,631 INFO L175 Difference]: Start difference. First operand has 256 places, 366 transitions, 5060 flow. Second operand 8 states and 134 transitions. [2024-06-21 21:34:56,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 390 transitions, 6048 flow [2024-06-21 21:34:57,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 390 transitions, 5900 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 21:34:57,339 INFO L231 Difference]: Finished difference. Result has 260 places, 366 transitions, 5046 flow [2024-06-21 21:34:57,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4912, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5046, PETRI_PLACES=260, PETRI_TRANSITIONS=366} [2024-06-21 21:34:57,339 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-21 21:34:57,340 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 366 transitions, 5046 flow [2024-06-21 21:34:57,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:57,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:57,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:57,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 21:34:57,340 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:57,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:57,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1677542543, now seen corresponding path program 3 times [2024-06-21 21:34:57,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:57,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787406111] [2024-06-21 21:34:57,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:57,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:57,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:57,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787406111] [2024-06-21 21:34:57,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787406111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:57,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:57,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:34:57,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112255799] [2024-06-21 21:34:57,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:57,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:34:57,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:57,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:34:57,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:34:57,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:57,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 366 transitions, 5046 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-21 21:34:57,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:57,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:57,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:58,976 INFO L124 PetriNetUnfolderBase]: 3645/5633 cut-off events. [2024-06-21 21:34:58,976 INFO L125 PetriNetUnfolderBase]: For 417867/417873 co-relation queries the response was YES. [2024-06-21 21:34:59,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44184 conditions, 5633 events. 3645/5633 cut-off events. For 417867/417873 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 31700 event pairs, 932 based on Foata normal form. 6/5633 useless extension candidates. Maximal degree in co-relation 44056. Up to 5416 conditions per place. [2024-06-21 21:34:59,047 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 321 selfloop transitions, 66 changer transitions 0/390 dead transitions. [2024-06-21 21:34:59,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 390 transitions, 6241 flow [2024-06-21 21:34:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:34:59,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:34:59,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 21:34:59,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 21:34:59,048 INFO L175 Difference]: Start difference. First operand has 260 places, 366 transitions, 5046 flow. Second operand 7 states and 115 transitions. [2024-06-21 21:34:59,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 390 transitions, 6241 flow [2024-06-21 21:34:59,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 390 transitions, 6105 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:34:59,997 INFO L231 Difference]: Finished difference. Result has 261 places, 373 transitions, 5207 flow [2024-06-21 21:34:59,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4910, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5207, PETRI_PLACES=261, PETRI_TRANSITIONS=373} [2024-06-21 21:34:59,998 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-21 21:34:59,998 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 373 transitions, 5207 flow [2024-06-21 21:34:59,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-21 21:34:59,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:59,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:59,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 21:34:59,999 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:59,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:59,999 INFO L85 PathProgramCache]: Analyzing trace with hash -566295405, now seen corresponding path program 4 times [2024-06-21 21:34:59,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:59,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773437411] [2024-06-21 21:34:59,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:59,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:00,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:00,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773437411] [2024-06-21 21:35:00,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773437411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:00,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:00,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:35:00,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97139512] [2024-06-21 21:35:00,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:00,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:35:00,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:00,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:35:00,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:35:00,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:35:00,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 373 transitions, 5207 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:00,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:00,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:35:00,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:01,880 INFO L124 PetriNetUnfolderBase]: 3621/5599 cut-off events. [2024-06-21 21:35:01,880 INFO L125 PetriNetUnfolderBase]: For 424479/424479 co-relation queries the response was YES. [2024-06-21 21:35:01,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43850 conditions, 5599 events. 3621/5599 cut-off events. For 424479/424479 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31574 event pairs, 914 based on Foata normal form. 6/5603 useless extension candidates. Maximal degree in co-relation 43720. Up to 5479 conditions per place. [2024-06-21 21:35:01,945 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 347 selfloop transitions, 40 changer transitions 0/390 dead transitions. [2024-06-21 21:35:01,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 390 transitions, 6049 flow [2024-06-21 21:35:01,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:01,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 21:35:01,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-21 21:35:01,946 INFO L175 Difference]: Start difference. First operand has 261 places, 373 transitions, 5207 flow. Second operand 8 states and 126 transitions. [2024-06-21 21:35:01,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 390 transitions, 6049 flow [2024-06-21 21:35:02,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 390 transitions, 5763 flow, removed 111 selfloop flow, removed 3 redundant places. [2024-06-21 21:35:02,719 INFO L231 Difference]: Finished difference. Result has 266 places, 373 transitions, 5015 flow [2024-06-21 21:35:02,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4921, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5015, PETRI_PLACES=266, PETRI_TRANSITIONS=373} [2024-06-21 21:35:02,720 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-21 21:35:02,720 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 373 transitions, 5015 flow [2024-06-21 21:35:02,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:02,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:02,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:02,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 21:35:02,721 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:02,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:02,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1169442631, now seen corresponding path program 5 times [2024-06-21 21:35:02,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:02,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507048543] [2024-06-21 21:35:02,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:02,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:03,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:03,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507048543] [2024-06-21 21:35:03,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507048543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:03,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:03,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:35:03,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773523102] [2024-06-21 21:35:03,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:03,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:35:03,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:03,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:35:03,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:35:03,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:35:03,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 373 transitions, 5015 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:03,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:03,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:35:03,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:04,397 INFO L124 PetriNetUnfolderBase]: 3619/5608 cut-off events. [2024-06-21 21:35:04,398 INFO L125 PetriNetUnfolderBase]: For 427620/427620 co-relation queries the response was YES. [2024-06-21 21:35:04,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43387 conditions, 5608 events. 3619/5608 cut-off events. For 427620/427620 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 31785 event pairs, 1514 based on Foata normal form. 6/5612 useless extension candidates. Maximal degree in co-relation 43256. Up to 5472 conditions per place. [2024-06-21 21:35:04,470 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 346 selfloop transitions, 42 changer transitions 0/391 dead transitions. [2024-06-21 21:35:04,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 391 transitions, 6060 flow [2024-06-21 21:35:04,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:35:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:35:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 128 transitions. [2024-06-21 21:35:04,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35555555555555557 [2024-06-21 21:35:04,471 INFO L175 Difference]: Start difference. First operand has 266 places, 373 transitions, 5015 flow. Second operand 9 states and 128 transitions. [2024-06-21 21:35:04,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 391 transitions, 6060 flow [2024-06-21 21:35:05,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 391 transitions, 5976 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:35:05,466 INFO L231 Difference]: Finished difference. Result has 269 places, 378 transitions, 5152 flow [2024-06-21 21:35:05,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4935, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5152, PETRI_PLACES=269, PETRI_TRANSITIONS=378} [2024-06-21 21:35:05,466 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 228 predicate places. [2024-06-21 21:35:05,466 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 378 transitions, 5152 flow [2024-06-21 21:35:05,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:05,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:05,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:05,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 21:35:05,467 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)] === [2024-06-21 21:35:05,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:05,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2112414489, now seen corresponding path program 6 times [2024-06-21 21:35:05,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:05,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774279009] [2024-06-21 21:35:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:05,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:06,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:06,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:06,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774279009] [2024-06-21 21:35:06,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774279009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:06,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:06,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:35:06,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849905035] [2024-06-21 21:35:06,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:06,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:35:06,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:06,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:35:06,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:35:06,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:35:06,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 378 transitions, 5152 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:06,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:06,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:35:06,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:07,382 INFO L124 PetriNetUnfolderBase]: 3604/5575 cut-off events. [2024-06-21 21:35:07,382 INFO L125 PetriNetUnfolderBase]: For 425729/425733 co-relation queries the response was YES. [2024-06-21 21:35:07,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43268 conditions, 5575 events. 3604/5575 cut-off events. For 425729/425733 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31530 event pairs, 1196 based on Foata normal form. 7/5580 useless extension candidates. Maximal degree in co-relation 43135. Up to 5480 conditions per place. [2024-06-21 21:35:07,455 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 357 selfloop transitions, 35 changer transitions 0/395 dead transitions. [2024-06-21 21:35:07,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 395 transitions, 6002 flow [2024-06-21 21:35:07,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:35:07,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:35:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 21:35:07,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 21:35:07,456 INFO L175 Difference]: Start difference. First operand has 269 places, 378 transitions, 5152 flow. Second operand 6 states and 104 transitions. [2024-06-21 21:35:07,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 395 transitions, 6002 flow [2024-06-21 21:35:08,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 395 transitions, 5686 flow, removed 121 selfloop flow, removed 6 redundant places. [2024-06-21 21:35:08,338 INFO L231 Difference]: Finished difference. Result has 269 places, 378 transitions, 4924 flow [2024-06-21 21:35:08,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4836, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4924, PETRI_PLACES=269, PETRI_TRANSITIONS=378} [2024-06-21 21:35:08,339 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 228 predicate places. [2024-06-21 21:35:08,339 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 378 transitions, 4924 flow [2024-06-21 21:35:08,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:08,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:08,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:08,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 21:35:08,339 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:08,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:08,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1374684597, now seen corresponding path program 5 times [2024-06-21 21:35:08,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:08,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625589444] [2024-06-21 21:35:08,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:08,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:09,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:09,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625589444] [2024-06-21 21:35:09,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625589444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:09,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:09,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:09,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932174676] [2024-06-21 21:35:09,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:09,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:09,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:09,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:09,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:09,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:35:09,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 378 transitions, 4924 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:09,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:09,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:35:09,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:10,491 INFO L124 PetriNetUnfolderBase]: 3584/5540 cut-off events. [2024-06-21 21:35:10,491 INFO L125 PetriNetUnfolderBase]: For 428434/428440 co-relation queries the response was YES. [2024-06-21 21:35:10,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42130 conditions, 5540 events. 3584/5540 cut-off events. For 428434/428440 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31076 event pairs, 754 based on Foata normal form. 16/5543 useless extension candidates. Maximal degree in co-relation 41998. Up to 4989 conditions per place. [2024-06-21 21:35:10,558 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 322 selfloop transitions, 80 changer transitions 0/405 dead transitions. [2024-06-21 21:35:10,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 405 transitions, 5740 flow [2024-06-21 21:35:10,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:10,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 21:35:10,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 21:35:10,559 INFO L175 Difference]: Start difference. First operand has 269 places, 378 transitions, 4924 flow. Second operand 8 states and 134 transitions. [2024-06-21 21:35:10,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 405 transitions, 5740 flow [2024-06-21 21:35:11,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 405 transitions, 5614 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 21:35:11,447 INFO L231 Difference]: Finished difference. Result has 270 places, 377 transitions, 4868 flow [2024-06-21 21:35:11,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4704, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4868, PETRI_PLACES=270, PETRI_TRANSITIONS=377} [2024-06-21 21:35:11,447 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-21 21:35:11,447 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 377 transitions, 4868 flow [2024-06-21 21:35:11,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:11,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:11,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:11,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 21:35:11,448 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)] === [2024-06-21 21:35:11,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:11,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1415593476, now seen corresponding path program 4 times [2024-06-21 21:35:11,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:11,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987268820] [2024-06-21 21:35:11,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:11,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:12,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:12,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987268820] [2024-06-21 21:35:12,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987268820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:12,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:12,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:12,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472679730] [2024-06-21 21:35:12,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:12,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:12,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:12,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:12,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:12,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:35:12,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 377 transitions, 4868 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:12,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:12,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:35:12,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:13,269 INFO L124 PetriNetUnfolderBase]: 3604/5569 cut-off events. [2024-06-21 21:35:13,269 INFO L125 PetriNetUnfolderBase]: For 393091/393095 co-relation queries the response was YES. [2024-06-21 21:35:13,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41832 conditions, 5569 events. 3604/5569 cut-off events. For 393091/393095 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31278 event pairs, 789 based on Foata normal form. 8/5575 useless extension candidates. Maximal degree in co-relation 41701. Up to 5368 conditions per place. [2024-06-21 21:35:13,339 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 346 selfloop transitions, 52 changer transitions 0/401 dead transitions. [2024-06-21 21:35:13,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 401 transitions, 5921 flow [2024-06-21 21:35:13,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:35:13,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:35:13,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 21:35:13,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 21:35:13,340 INFO L175 Difference]: Start difference. First operand has 270 places, 377 transitions, 4868 flow. Second operand 7 states and 118 transitions. [2024-06-21 21:35:13,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 401 transitions, 5921 flow [2024-06-21 21:35:14,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 401 transitions, 5672 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 21:35:14,099 INFO L231 Difference]: Finished difference. Result has 270 places, 380 transitions, 4778 flow [2024-06-21 21:35:14,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4619, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4778, PETRI_PLACES=270, PETRI_TRANSITIONS=380} [2024-06-21 21:35:14,100 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-21 21:35:14,100 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 380 transitions, 4778 flow [2024-06-21 21:35:14,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:14,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:14,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:14,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 21:35:14,100 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)] === [2024-06-21 21:35:14,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:14,101 INFO L85 PathProgramCache]: Analyzing trace with hash 138616774, now seen corresponding path program 5 times [2024-06-21 21:35:14,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:14,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911132115] [2024-06-21 21:35:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:14,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:14,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:14,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911132115] [2024-06-21 21:35:14,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911132115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:14,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:14,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:14,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519150451] [2024-06-21 21:35:14,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:14,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:14,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:14,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:14,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:14,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:35:14,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 380 transitions, 4778 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:14,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:14,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:35:14,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:15,836 INFO L124 PetriNetUnfolderBase]: 3592/5559 cut-off events. [2024-06-21 21:35:15,837 INFO L125 PetriNetUnfolderBase]: For 393690/393694 co-relation queries the response was YES. [2024-06-21 21:35:15,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41183 conditions, 5559 events. 3592/5559 cut-off events. For 393690/393694 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31451 event pairs, 1148 based on Foata normal form. 8/5565 useless extension candidates. Maximal degree in co-relation 41052. Up to 5360 conditions per place. [2024-06-21 21:35:15,910 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 344 selfloop transitions, 57 changer transitions 0/404 dead transitions. [2024-06-21 21:35:15,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 404 transitions, 5674 flow [2024-06-21 21:35:15,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:35:15,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:35:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:35:15,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-21 21:35:15,911 INFO L175 Difference]: Start difference. First operand has 270 places, 380 transitions, 4778 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:35:15,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 404 transitions, 5674 flow [2024-06-21 21:35:16,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 404 transitions, 5472 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 21:35:16,725 INFO L231 Difference]: Finished difference. Result has 272 places, 380 transitions, 4696 flow [2024-06-21 21:35:16,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4576, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4696, PETRI_PLACES=272, PETRI_TRANSITIONS=380} [2024-06-21 21:35:16,726 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-21 21:35:16,726 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 380 transitions, 4696 flow [2024-06-21 21:35:16,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:16,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:16,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:16,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 21:35:16,726 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)] === [2024-06-21 21:35:16,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:16,727 INFO L85 PathProgramCache]: Analyzing trace with hash 710952039, now seen corresponding path program 1 times [2024-06-21 21:35:16,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:16,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197694344] [2024-06-21 21:35:16,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:16,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:17,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:17,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197694344] [2024-06-21 21:35:17,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197694344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:17,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:17,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:17,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598284052] [2024-06-21 21:35:17,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:17,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:17,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:17,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:17,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:17,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:35:17,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 380 transitions, 4696 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:17,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:17,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:35:17,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:18,879 INFO L124 PetriNetUnfolderBase]: 3610/5584 cut-off events. [2024-06-21 21:35:18,880 INFO L125 PetriNetUnfolderBase]: For 400468/400474 co-relation queries the response was YES. [2024-06-21 21:35:18,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41412 conditions, 5584 events. 3610/5584 cut-off events. For 400468/400474 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 31553 event pairs, 1186 based on Foata normal form. 6/5585 useless extension candidates. Maximal degree in co-relation 41280. Up to 5330 conditions per place. [2024-06-21 21:35:18,938 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 325 selfloop transitions, 83 changer transitions 0/411 dead transitions. [2024-06-21 21:35:18,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 411 transitions, 6104 flow [2024-06-21 21:35:18,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:35:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:35:18,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 21:35:18,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-21 21:35:18,940 INFO L175 Difference]: Start difference. First operand has 272 places, 380 transitions, 4696 flow. Second operand 9 states and 143 transitions. [2024-06-21 21:35:18,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 411 transitions, 6104 flow [2024-06-21 21:35:19,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 411 transitions, 5942 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:35:19,703 INFO L231 Difference]: Finished difference. Result has 274 places, 388 transitions, 4832 flow [2024-06-21 21:35:19,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4534, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4832, PETRI_PLACES=274, PETRI_TRANSITIONS=388} [2024-06-21 21:35:19,704 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-21 21:35:19,704 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 388 transitions, 4832 flow [2024-06-21 21:35:19,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:19,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:19,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:19,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 21:35:19,704 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)] === [2024-06-21 21:35:19,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:19,705 INFO L85 PathProgramCache]: Analyzing trace with hash 711042404, now seen corresponding path program 1 times [2024-06-21 21:35:19,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:19,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391228458] [2024-06-21 21:35:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:19,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:20,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:20,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391228458] [2024-06-21 21:35:20,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391228458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:20,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:20,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:20,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251332584] [2024-06-21 21:35:20,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:20,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:20,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:20,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:20,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:20,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:35:20,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 388 transitions, 4832 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:20,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:20,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:35:20,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:21,394 INFO L124 PetriNetUnfolderBase]: 3670/5667 cut-off events. [2024-06-21 21:35:21,395 INFO L125 PetriNetUnfolderBase]: For 431056/431062 co-relation queries the response was YES. [2024-06-21 21:35:21,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43412 conditions, 5667 events. 3670/5667 cut-off events. For 431056/431062 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 32019 event pairs, 1174 based on Foata normal form. 8/5670 useless extension candidates. Maximal degree in co-relation 43279. Up to 5252 conditions per place. [2024-06-21 21:35:21,470 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 320 selfloop transitions, 103 changer transitions 0/426 dead transitions. [2024-06-21 21:35:21,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 426 transitions, 6386 flow [2024-06-21 21:35:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:21,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:21,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 21:35:21,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 21:35:21,471 INFO L175 Difference]: Start difference. First operand has 274 places, 388 transitions, 4832 flow. Second operand 8 states and 132 transitions. [2024-06-21 21:35:21,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 426 transitions, 6386 flow [2024-06-21 21:35:22,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 426 transitions, 6219 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 21:35:22,271 INFO L231 Difference]: Finished difference. Result has 279 places, 405 transitions, 5346 flow [2024-06-21 21:35:22,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4665, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5346, PETRI_PLACES=279, PETRI_TRANSITIONS=405} [2024-06-21 21:35:22,271 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2024-06-21 21:35:22,271 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 405 transitions, 5346 flow [2024-06-21 21:35:22,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:22,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:22,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:22,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 21:35:22,272 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)] === [2024-06-21 21:35:22,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:22,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1688978474, now seen corresponding path program 2 times [2024-06-21 21:35:22,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:22,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932485609] [2024-06-21 21:35:22,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:22,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:22,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:22,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932485609] [2024-06-21 21:35:22,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932485609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:22,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:22,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:22,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417311166] [2024-06-21 21:35:22,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:22,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:22,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:22,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:22,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:23,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:35:23,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 405 transitions, 5346 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:23,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:23,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:35:23,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:24,251 INFO L124 PetriNetUnfolderBase]: 3738/5771 cut-off events. [2024-06-21 21:35:24,252 INFO L125 PetriNetUnfolderBase]: For 467205/467205 co-relation queries the response was YES. [2024-06-21 21:35:24,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46248 conditions, 5771 events. 3738/5771 cut-off events. For 467205/467205 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 32746 event pairs, 1494 based on Foata normal form. 4/5773 useless extension candidates. Maximal degree in co-relation 46111. Up to 5591 conditions per place. [2024-06-21 21:35:24,325 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 382 selfloop transitions, 52 changer transitions 0/437 dead transitions. [2024-06-21 21:35:24,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 437 transitions, 6911 flow [2024-06-21 21:35:24,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:35:24,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:35:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 21:35:24,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 21:35:24,326 INFO L175 Difference]: Start difference. First operand has 279 places, 405 transitions, 5346 flow. Second operand 9 states and 140 transitions. [2024-06-21 21:35:24,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 437 transitions, 6911 flow [2024-06-21 21:35:25,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 437 transitions, 6730 flow, removed 87 selfloop flow, removed 2 redundant places. [2024-06-21 21:35:25,320 INFO L231 Difference]: Finished difference. Result has 287 places, 416 transitions, 5643 flow [2024-06-21 21:35:25,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5199, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5643, PETRI_PLACES=287, PETRI_TRANSITIONS=416} [2024-06-21 21:35:25,321 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-21 21:35:25,321 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 416 transitions, 5643 flow [2024-06-21 21:35:25,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:25,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:25,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:25,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 21:35:25,321 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)] === [2024-06-21 21:35:25,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:25,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1688978319, now seen corresponding path program 2 times [2024-06-21 21:35:25,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:25,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302271890] [2024-06-21 21:35:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:25,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:26,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:26,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302271890] [2024-06-21 21:35:26,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302271890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:26,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:26,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:26,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740008180] [2024-06-21 21:35:26,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:26,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:26,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:26,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:26,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:26,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:35:26,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 416 transitions, 5643 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:26,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:26,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:35:26,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:27,654 INFO L124 PetriNetUnfolderBase]: 3768/5813 cut-off events. [2024-06-21 21:35:27,654 INFO L125 PetriNetUnfolderBase]: For 474603/474603 co-relation queries the response was YES. [2024-06-21 21:35:27,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45855 conditions, 5813 events. 3768/5813 cut-off events. For 474603/474603 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 32977 event pairs, 1497 based on Foata normal form. 6/5817 useless extension candidates. Maximal degree in co-relation 45714. Up to 5658 conditions per place. [2024-06-21 21:35:27,715 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 390 selfloop transitions, 50 changer transitions 0/443 dead transitions. [2024-06-21 21:35:27,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 443 transitions, 6725 flow [2024-06-21 21:35:27,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:35:27,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:35:27,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-21 21:35:27,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861111111111111 [2024-06-21 21:35:27,716 INFO L175 Difference]: Start difference. First operand has 287 places, 416 transitions, 5643 flow. Second operand 9 states and 139 transitions. [2024-06-21 21:35:27,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 443 transitions, 6725 flow [2024-06-21 21:35:28,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 443 transitions, 6580 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-21 21:35:28,692 INFO L231 Difference]: Finished difference. Result has 292 places, 424 transitions, 5742 flow [2024-06-21 21:35:28,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5498, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5742, PETRI_PLACES=292, PETRI_TRANSITIONS=424} [2024-06-21 21:35:28,693 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2024-06-21 21:35:28,693 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 424 transitions, 5742 flow [2024-06-21 21:35:28,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:28,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:28,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:28,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 21:35:28,694 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)] === [2024-06-21 21:35:28,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:28,694 INFO L85 PathProgramCache]: Analyzing trace with hash 354604430, now seen corresponding path program 3 times [2024-06-21 21:35:28,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:28,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932440789] [2024-06-21 21:35:28,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:28,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:29,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:29,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:29,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932440789] [2024-06-21 21:35:29,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932440789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:29,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:29,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:29,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770400852] [2024-06-21 21:35:29,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:29,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:29,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:29,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:29,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:29,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:35:29,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 424 transitions, 5742 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:29,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:29,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:35:29,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:30,681 INFO L124 PetriNetUnfolderBase]: 3824/5891 cut-off events. [2024-06-21 21:35:30,682 INFO L125 PetriNetUnfolderBase]: For 491472/491472 co-relation queries the response was YES. [2024-06-21 21:35:30,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47590 conditions, 5891 events. 3824/5891 cut-off events. For 491472/491472 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 33428 event pairs, 1498 based on Foata normal form. 4/5893 useless extension candidates. Maximal degree in co-relation 47447. Up to 5729 conditions per place. [2024-06-21 21:35:30,758 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 404 selfloop transitions, 43 changer transitions 0/450 dead transitions. [2024-06-21 21:35:30,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 450 transitions, 7089 flow [2024-06-21 21:35:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:30,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 21:35:30,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-21 21:35:30,760 INFO L175 Difference]: Start difference. First operand has 292 places, 424 transitions, 5742 flow. Second operand 8 states and 123 transitions. [2024-06-21 21:35:30,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 450 transitions, 7089 flow [2024-06-21 21:35:31,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 450 transitions, 6913 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-21 21:35:31,807 INFO L231 Difference]: Finished difference. Result has 294 places, 432 transitions, 5929 flow [2024-06-21 21:35:31,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5566, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5929, PETRI_PLACES=294, PETRI_TRANSITIONS=432} [2024-06-21 21:35:31,808 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 253 predicate places. [2024-06-21 21:35:31,808 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 432 transitions, 5929 flow [2024-06-21 21:35:31,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:31,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:31,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:31,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 21:35:31,808 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)] === [2024-06-21 21:35:31,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:31,809 INFO L85 PathProgramCache]: Analyzing trace with hash 151966769, now seen corresponding path program 1 times [2024-06-21 21:35:31,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:31,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921239109] [2024-06-21 21:35:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:31,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:32,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:32,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921239109] [2024-06-21 21:35:32,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921239109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:32,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:32,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:32,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322607299] [2024-06-21 21:35:32,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:32,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:32,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:32,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:32,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:32,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:35:32,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 432 transitions, 5929 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:32,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:32,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:35:32,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:33,824 INFO L124 PetriNetUnfolderBase]: 3821/5887 cut-off events. [2024-06-21 21:35:33,824 INFO L125 PetriNetUnfolderBase]: For 497696/497696 co-relation queries the response was YES. [2024-06-21 21:35:33,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47676 conditions, 5887 events. 3821/5887 cut-off events. For 497696/497696 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33444 event pairs, 1498 based on Foata normal form. 1/5886 useless extension candidates. Maximal degree in co-relation 47531. Up to 5792 conditions per place. [2024-06-21 21:35:33,900 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 413 selfloop transitions, 30 changer transitions 0/446 dead transitions. [2024-06-21 21:35:33,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 446 transitions, 6923 flow [2024-06-21 21:35:33,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:35:33,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:35:33,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-21 21:35:33,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 21:35:33,901 INFO L175 Difference]: Start difference. First operand has 294 places, 432 transitions, 5929 flow. Second operand 5 states and 85 transitions. [2024-06-21 21:35:33,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 446 transitions, 6923 flow [2024-06-21 21:35:35,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 446 transitions, 6685 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-21 21:35:35,018 INFO L231 Difference]: Finished difference. Result has 293 places, 435 transitions, 5843 flow [2024-06-21 21:35:35,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5691, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5843, PETRI_PLACES=293, PETRI_TRANSITIONS=435} [2024-06-21 21:35:35,018 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-21 21:35:35,019 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 435 transitions, 5843 flow [2024-06-21 21:35:35,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:35,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:35,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:35,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 21:35:35,019 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)] === [2024-06-21 21:35:35,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:35,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1169450722, now seen corresponding path program 4 times [2024-06-21 21:35:35,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:35,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499289421] [2024-06-21 21:35:35,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:35,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:35,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:35,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499289421] [2024-06-21 21:35:35,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499289421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:35,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:35,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:35,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121438119] [2024-06-21 21:35:35,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:35,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:35,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:35,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:35,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:35,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:35:35,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 435 transitions, 5843 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:35,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:35,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:35:35,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:37,056 INFO L124 PetriNetUnfolderBase]: 3873/5959 cut-off events. [2024-06-21 21:35:37,056 INFO L125 PetriNetUnfolderBase]: For 529987/529987 co-relation queries the response was YES. [2024-06-21 21:35:37,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48721 conditions, 5959 events. 3873/5959 cut-off events. For 529987/529987 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 33915 event pairs, 1518 based on Foata normal form. 4/5961 useless extension candidates. Maximal degree in co-relation 48578. Up to 5728 conditions per place. [2024-06-21 21:35:37,131 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 395 selfloop transitions, 64 changer transitions 0/462 dead transitions. [2024-06-21 21:35:37,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 462 transitions, 7436 flow [2024-06-21 21:35:37,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:35:37,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:35:37,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 141 transitions. [2024-06-21 21:35:37,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3525 [2024-06-21 21:35:37,133 INFO L175 Difference]: Start difference. First operand has 293 places, 435 transitions, 5843 flow. Second operand 10 states and 141 transitions. [2024-06-21 21:35:37,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 462 transitions, 7436 flow [2024-06-21 21:35:38,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 462 transitions, 7358 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 21:35:38,210 INFO L231 Difference]: Finished difference. Result has 302 places, 446 transitions, 6287 flow [2024-06-21 21:35:38,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5765, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6287, PETRI_PLACES=302, PETRI_TRANSITIONS=446} [2024-06-21 21:35:38,210 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 261 predicate places. [2024-06-21 21:35:38,210 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 446 transitions, 6287 flow [2024-06-21 21:35:38,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:38,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:38,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:38,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 21:35:38,211 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)] === [2024-06-21 21:35:38,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:38,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1832868849, now seen corresponding path program 3 times [2024-06-21 21:35:38,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:38,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183981460] [2024-06-21 21:35:38,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:38,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:39,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:39,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183981460] [2024-06-21 21:35:39,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183981460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:39,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:39,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:39,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473350199] [2024-06-21 21:35:39,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:39,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:39,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:39,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:39,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:39,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:35:39,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 446 transitions, 6287 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:39,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:39,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:35:39,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:40,369 INFO L124 PetriNetUnfolderBase]: 3895/5979 cut-off events. [2024-06-21 21:35:40,369 INFO L125 PetriNetUnfolderBase]: For 542553/542557 co-relation queries the response was YES. [2024-06-21 21:35:40,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49414 conditions, 5979 events. 3895/5979 cut-off events. For 542553/542557 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 33892 event pairs, 1207 based on Foata normal form. 10/5987 useless extension candidates. Maximal degree in co-relation 49268. Up to 5727 conditions per place. [2024-06-21 21:35:40,448 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 400 selfloop transitions, 77 changer transitions 0/480 dead transitions. [2024-06-21 21:35:40,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 480 transitions, 7473 flow [2024-06-21 21:35:40,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:40,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:40,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 21:35:40,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 21:35:40,449 INFO L175 Difference]: Start difference. First operand has 302 places, 446 transitions, 6287 flow. Second operand 8 states and 141 transitions. [2024-06-21 21:35:40,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 480 transitions, 7473 flow [2024-06-21 21:35:41,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 480 transitions, 7278 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-21 21:35:41,565 INFO L231 Difference]: Finished difference. Result has 306 places, 453 transitions, 6393 flow [2024-06-21 21:35:41,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6092, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6393, PETRI_PLACES=306, PETRI_TRANSITIONS=453} [2024-06-21 21:35:41,566 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-21 21:35:41,566 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 453 transitions, 6393 flow [2024-06-21 21:35:41,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:41,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:41,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:41,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 21:35:41,566 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)] === [2024-06-21 21:35:41,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:41,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1593676883, now seen corresponding path program 1 times [2024-06-21 21:35:41,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:41,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84731335] [2024-06-21 21:35:41,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:41,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:42,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:42,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:42,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84731335] [2024-06-21 21:35:42,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84731335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:42,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:42,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:42,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502616263] [2024-06-21 21:35:42,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:42,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:42,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:42,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:42,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:42,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:35:42,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 453 transitions, 6393 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:42,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:42,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:35:42,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:43,499 INFO L124 PetriNetUnfolderBase]: 3994/6128 cut-off events. [2024-06-21 21:35:43,499 INFO L125 PetriNetUnfolderBase]: For 549667/549671 co-relation queries the response was YES. [2024-06-21 21:35:43,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50823 conditions, 6128 events. 3994/6128 cut-off events. For 549667/549671 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 34729 event pairs, 796 based on Foata normal form. 6/6132 useless extension candidates. Maximal degree in co-relation 50676. Up to 5837 conditions per place. [2024-06-21 21:35:43,580 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 439 selfloop transitions, 62 changer transitions 0/504 dead transitions. [2024-06-21 21:35:43,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 504 transitions, 7923 flow [2024-06-21 21:35:43,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:43,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:43,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 21:35:43,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 21:35:43,582 INFO L175 Difference]: Start difference. First operand has 306 places, 453 transitions, 6393 flow. Second operand 8 states and 132 transitions. [2024-06-21 21:35:43,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 504 transitions, 7923 flow [2024-06-21 21:35:44,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 504 transitions, 7694 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 21:35:44,718 INFO L231 Difference]: Finished difference. Result has 310 places, 473 transitions, 6592 flow [2024-06-21 21:35:44,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6164, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6592, PETRI_PLACES=310, PETRI_TRANSITIONS=473} [2024-06-21 21:35:44,718 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 269 predicate places. [2024-06-21 21:35:44,718 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 473 transitions, 6592 flow [2024-06-21 21:35:44,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:44,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:44,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:44,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 21:35:44,720 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)] === [2024-06-21 21:35:44,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:44,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1059893153, now seen corresponding path program 2 times [2024-06-21 21:35:44,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:44,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188646324] [2024-06-21 21:35:44,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:44,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:45,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:45,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:45,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188646324] [2024-06-21 21:35:45,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188646324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:45,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:45,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:45,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747110894] [2024-06-21 21:35:45,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:45,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:45,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:45,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:45,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:45,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:35:45,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 473 transitions, 6592 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:45,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:45,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:35:45,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:46,796 INFO L124 PetriNetUnfolderBase]: 3989/6117 cut-off events. [2024-06-21 21:35:46,796 INFO L125 PetriNetUnfolderBase]: For 557948/557954 co-relation queries the response was YES. [2024-06-21 21:35:46,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50913 conditions, 6117 events. 3989/6117 cut-off events. For 557948/557954 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 34524 event pairs, 819 based on Foata normal form. 8/6123 useless extension candidates. Maximal degree in co-relation 50763. Up to 5925 conditions per place. [2024-06-21 21:35:46,877 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 438 selfloop transitions, 57 changer transitions 0/498 dead transitions. [2024-06-21 21:35:46,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 498 transitions, 7704 flow [2024-06-21 21:35:46,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:46,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:46,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 21:35:46,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 21:35:46,879 INFO L175 Difference]: Start difference. First operand has 310 places, 473 transitions, 6592 flow. Second operand 8 states and 127 transitions. [2024-06-21 21:35:46,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 498 transitions, 7704 flow [2024-06-21 21:35:48,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 498 transitions, 7641 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-21 21:35:48,238 INFO L231 Difference]: Finished difference. Result has 317 places, 475 transitions, 6707 flow [2024-06-21 21:35:48,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6529, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6707, PETRI_PLACES=317, PETRI_TRANSITIONS=475} [2024-06-21 21:35:48,238 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 276 predicate places. [2024-06-21 21:35:48,238 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 475 transitions, 6707 flow [2024-06-21 21:35:48,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:48,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:48,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:48,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 21:35:48,239 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)] === [2024-06-21 21:35:48,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:48,239 INFO L85 PathProgramCache]: Analyzing trace with hash 2013072369, now seen corresponding path program 3 times [2024-06-21 21:35:48,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:48,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172357925] [2024-06-21 21:35:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:48,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:48,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:48,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:48,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172357925] [2024-06-21 21:35:48,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172357925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:48,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:48,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:48,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367874811] [2024-06-21 21:35:48,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:48,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:48,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:48,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:48,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:48,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:35:48,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 475 transitions, 6707 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:48,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:48,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:35:48,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:50,247 INFO L124 PetriNetUnfolderBase]: 4005/6146 cut-off events. [2024-06-21 21:35:50,247 INFO L125 PetriNetUnfolderBase]: For 572547/572555 co-relation queries the response was YES. [2024-06-21 21:35:50,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51372 conditions, 6146 events. 4005/6146 cut-off events. For 572547/572555 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 34596 event pairs, 647 based on Foata normal form. 10/6154 useless extension candidates. Maximal degree in co-relation 51219. Up to 5771 conditions per place. [2024-06-21 21:35:50,330 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 436 selfloop transitions, 68 changer transitions 0/507 dead transitions. [2024-06-21 21:35:50,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 507 transitions, 8035 flow [2024-06-21 21:35:50,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:50,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:50,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 21:35:50,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:35:50,332 INFO L175 Difference]: Start difference. First operand has 317 places, 475 transitions, 6707 flow. Second operand 8 states and 128 transitions. [2024-06-21 21:35:50,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 507 transitions, 8035 flow [2024-06-21 21:35:51,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 507 transitions, 7937 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 21:35:51,684 INFO L231 Difference]: Finished difference. Result has 320 places, 481 transitions, 6841 flow [2024-06-21 21:35:51,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6609, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6841, PETRI_PLACES=320, PETRI_TRANSITIONS=481} [2024-06-21 21:35:51,684 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 279 predicate places. [2024-06-21 21:35:51,684 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 481 transitions, 6841 flow [2024-06-21 21:35:51,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:51,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:51,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:51,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 21:35:51,685 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)] === [2024-06-21 21:35:51,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:51,686 INFO L85 PathProgramCache]: Analyzing trace with hash -570906001, now seen corresponding path program 1 times [2024-06-21 21:35:51,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:51,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773655147] [2024-06-21 21:35:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:51,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:52,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:52,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773655147] [2024-06-21 21:35:52,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773655147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:52,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:52,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:52,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936858017] [2024-06-21 21:35:52,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:52,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:52,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:52,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:52,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:52,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:35:52,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 481 transitions, 6841 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:52,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:52,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:35:52,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:53,675 INFO L124 PetriNetUnfolderBase]: 4036/6187 cut-off events. [2024-06-21 21:35:53,675 INFO L125 PetriNetUnfolderBase]: For 594035/594047 co-relation queries the response was YES. [2024-06-21 21:35:53,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52265 conditions, 6187 events. 4036/6187 cut-off events. For 594035/594047 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 35111 event pairs, 885 based on Foata normal form. 14/6199 useless extension candidates. Maximal degree in co-relation 52111. Up to 5948 conditions per place. [2024-06-21 21:35:53,761 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 452 selfloop transitions, 80 changer transitions 0/535 dead transitions. [2024-06-21 21:35:53,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 535 transitions, 8452 flow [2024-06-21 21:35:53,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:35:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:35:53,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 21:35:53,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-21 21:35:53,763 INFO L175 Difference]: Start difference. First operand has 320 places, 481 transitions, 6841 flow. Second operand 9 states and 148 transitions. [2024-06-21 21:35:53,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 535 transitions, 8452 flow [2024-06-21 21:35:55,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 535 transitions, 8330 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 21:35:55,167 INFO L231 Difference]: Finished difference. Result has 327 places, 505 transitions, 7220 flow [2024-06-21 21:35:55,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6735, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7220, PETRI_PLACES=327, PETRI_TRANSITIONS=505} [2024-06-21 21:35:55,168 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 286 predicate places. [2024-06-21 21:35:55,168 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 505 transitions, 7220 flow [2024-06-21 21:35:55,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:55,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:55,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:55,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 21:35:55,169 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)] === [2024-06-21 21:35:55,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:55,169 INFO L85 PathProgramCache]: Analyzing trace with hash -156652537, now seen corresponding path program 2 times [2024-06-21 21:35:55,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:55,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479273649] [2024-06-21 21:35:55,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:55,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:55,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:55,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479273649] [2024-06-21 21:35:55,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479273649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:55,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:55,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:55,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847213415] [2024-06-21 21:35:55,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:55,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:55,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:55,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:55,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:55,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:35:55,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 505 transitions, 7220 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:55,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:55,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:35:55,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:57,359 INFO L124 PetriNetUnfolderBase]: 4030/6176 cut-off events. [2024-06-21 21:35:57,359 INFO L125 PetriNetUnfolderBase]: For 603856/603868 co-relation queries the response was YES. [2024-06-21 21:35:57,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53258 conditions, 6176 events. 4030/6176 cut-off events. For 603856/603868 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 35012 event pairs, 929 based on Foata normal form. 14/6188 useless extension candidates. Maximal degree in co-relation 53100. Up to 5983 conditions per place. [2024-06-21 21:35:57,442 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 454 selfloop transitions, 73 changer transitions 0/530 dead transitions. [2024-06-21 21:35:57,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 530 transitions, 8364 flow [2024-06-21 21:35:57,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:35:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:35:57,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 21:35:57,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-21 21:35:57,443 INFO L175 Difference]: Start difference. First operand has 327 places, 505 transitions, 7220 flow. Second operand 9 states and 141 transitions. [2024-06-21 21:35:57,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 530 transitions, 8364 flow [2024-06-21 21:35:59,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 530 transitions, 8277 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-21 21:35:59,246 INFO L231 Difference]: Finished difference. Result has 334 places, 505 transitions, 7285 flow [2024-06-21 21:35:59,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7133, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7285, PETRI_PLACES=334, PETRI_TRANSITIONS=505} [2024-06-21 21:35:59,246 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 293 predicate places. [2024-06-21 21:35:59,246 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 505 transitions, 7285 flow [2024-06-21 21:35:59,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:59,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:59,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:59,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 21:35:59,247 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)] === [2024-06-21 21:35:59,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:59,247 INFO L85 PathProgramCache]: Analyzing trace with hash -267316689, now seen corresponding path program 3 times [2024-06-21 21:35:59,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:59,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644856564] [2024-06-21 21:35:59,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:59,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:59,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:59,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644856564] [2024-06-21 21:35:59,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644856564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:59,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:59,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:35:59,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808983682] [2024-06-21 21:35:59,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:59,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:35:59,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:59,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:35:59,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:35:59,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:35:59,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 505 transitions, 7285 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:35:59,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:59,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:35:59,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:01,514 INFO L124 PetriNetUnfolderBase]: 4124/6310 cut-off events. [2024-06-21 21:36:01,514 INFO L125 PetriNetUnfolderBase]: For 625823/625835 co-relation queries the response was YES. [2024-06-21 21:36:01,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54720 conditions, 6310 events. 4124/6310 cut-off events. For 625823/625835 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 35817 event pairs, 823 based on Foata normal form. 14/6322 useless extension candidates. Maximal degree in co-relation 54560. Up to 6051 conditions per place. [2024-06-21 21:36:01,589 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 468 selfloop transitions, 89 changer transitions 0/560 dead transitions. [2024-06-21 21:36:01,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 560 transitions, 9060 flow [2024-06-21 21:36:01,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:01,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:01,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 21:36:01,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-21 21:36:01,590 INFO L175 Difference]: Start difference. First operand has 334 places, 505 transitions, 7285 flow. Second operand 9 states and 149 transitions. [2024-06-21 21:36:01,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 560 transitions, 9060 flow [2024-06-21 21:36:03,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 560 transitions, 8905 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 21:36:03,032 INFO L231 Difference]: Finished difference. Result has 341 places, 531 transitions, 7798 flow [2024-06-21 21:36:03,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7157, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7798, PETRI_PLACES=341, PETRI_TRANSITIONS=531} [2024-06-21 21:36:03,033 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 300 predicate places. [2024-06-21 21:36:03,033 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 531 transitions, 7798 flow [2024-06-21 21:36:03,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:36:03,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:03,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:03,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 21:36:03,033 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)] === [2024-06-21 21:36:03,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:03,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1336588481, now seen corresponding path program 4 times [2024-06-21 21:36:03,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:03,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439946160] [2024-06-21 21:36:03,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:03,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:03,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:03,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439946160] [2024-06-21 21:36:03,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439946160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:03,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:03,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:03,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794894131] [2024-06-21 21:36:03,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:03,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:03,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:03,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:03,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:03,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:36:03,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 531 transitions, 7798 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:03,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:03,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:36:03,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:05,129 INFO L124 PetriNetUnfolderBase]: 4134/6323 cut-off events. [2024-06-21 21:36:05,129 INFO L125 PetriNetUnfolderBase]: For 643931/643943 co-relation queries the response was YES. [2024-06-21 21:36:05,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55650 conditions, 6323 events. 4134/6323 cut-off events. For 643931/643943 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 35873 event pairs, 840 based on Foata normal form. 14/6335 useless extension candidates. Maximal degree in co-relation 55486. Up to 6114 conditions per place. [2024-06-21 21:36:05,222 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 476 selfloop transitions, 80 changer transitions 0/559 dead transitions. [2024-06-21 21:36:05,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 559 transitions, 9088 flow [2024-06-21 21:36:05,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:05,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:05,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 21:36:05,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-21 21:36:05,223 INFO L175 Difference]: Start difference. First operand has 341 places, 531 transitions, 7798 flow. Second operand 9 states and 143 transitions. [2024-06-21 21:36:05,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 559 transitions, 9088 flow [2024-06-21 21:36:07,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 559 transitions, 8970 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-21 21:36:07,067 INFO L231 Difference]: Finished difference. Result has 348 places, 536 transitions, 7967 flow [2024-06-21 21:36:07,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7696, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7967, PETRI_PLACES=348, PETRI_TRANSITIONS=536} [2024-06-21 21:36:07,068 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 307 predicate places. [2024-06-21 21:36:07,068 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 536 transitions, 7967 flow [2024-06-21 21:36:07,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:07,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:07,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:07,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 21:36:07,068 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)] === [2024-06-21 21:36:07,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:07,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1227011231, now seen corresponding path program 5 times [2024-06-21 21:36:07,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:07,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514710208] [2024-06-21 21:36:07,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:07,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:07,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:07,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514710208] [2024-06-21 21:36:07,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514710208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:07,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:07,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:07,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281691066] [2024-06-21 21:36:07,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:07,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:07,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:07,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:07,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:07,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:36:07,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 536 transitions, 7967 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:36:07,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:07,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:36:07,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:09,198 INFO L124 PetriNetUnfolderBase]: 4211/6433 cut-off events. [2024-06-21 21:36:09,199 INFO L125 PetriNetUnfolderBase]: For 670271/670279 co-relation queries the response was YES. [2024-06-21 21:36:09,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57064 conditions, 6433 events. 4211/6433 cut-off events. For 670271/670279 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 36505 event pairs, 802 based on Foata normal form. 10/6441 useless extension candidates. Maximal degree in co-relation 56897. Up to 6037 conditions per place. [2024-06-21 21:36:09,296 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 464 selfloop transitions, 120 changer transitions 0/587 dead transitions. [2024-06-21 21:36:09,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 587 transitions, 9906 flow [2024-06-21 21:36:09,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:09,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 21:36:09,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-21 21:36:09,297 INFO L175 Difference]: Start difference. First operand has 348 places, 536 transitions, 7967 flow. Second operand 9 states and 151 transitions. [2024-06-21 21:36:09,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 587 transitions, 9906 flow [2024-06-21 21:36:10,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 587 transitions, 9728 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 21:36:10,755 INFO L231 Difference]: Finished difference. Result has 353 places, 556 transitions, 8449 flow [2024-06-21 21:36:10,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8449, PETRI_PLACES=353, PETRI_TRANSITIONS=556} [2024-06-21 21:36:10,756 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 312 predicate places. [2024-06-21 21:36:10,756 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 556 transitions, 8449 flow [2024-06-21 21:36:10,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:36:10,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:10,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:10,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 21:36:10,757 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)] === [2024-06-21 21:36:10,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:10,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1789902251, now seen corresponding path program 6 times [2024-06-21 21:36:10,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:10,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404545465] [2024-06-21 21:36:10,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:10,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:11,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:11,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404545465] [2024-06-21 21:36:11,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404545465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:11,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:11,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:11,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279411008] [2024-06-21 21:36:11,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:11,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:11,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:11,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:11,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:11,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:36:11,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 556 transitions, 8449 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:11,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:11,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:36:11,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:12,828 INFO L124 PetriNetUnfolderBase]: 4229/6457 cut-off events. [2024-06-21 21:36:12,828 INFO L125 PetriNetUnfolderBase]: For 693007/693015 co-relation queries the response was YES. [2024-06-21 21:36:13,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58339 conditions, 6457 events. 4229/6457 cut-off events. For 693007/693015 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 36655 event pairs, 796 based on Foata normal form. 10/6465 useless extension candidates. Maximal degree in co-relation 58169. Up to 6056 conditions per place. [2024-06-21 21:36:13,132 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 455 selfloop transitions, 132 changer transitions 0/590 dead transitions. [2024-06-21 21:36:13,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 590 transitions, 10210 flow [2024-06-21 21:36:13,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 21:36:13,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-21 21:36:13,133 INFO L175 Difference]: Start difference. First operand has 353 places, 556 transitions, 8449 flow. Second operand 9 states and 148 transitions. [2024-06-21 21:36:13,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 590 transitions, 10210 flow [2024-06-21 21:36:14,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 590 transitions, 9991 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-21 21:36:14,602 INFO L231 Difference]: Finished difference. Result has 359 places, 563 transitions, 8718 flow [2024-06-21 21:36:14,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8268, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8718, PETRI_PLACES=359, PETRI_TRANSITIONS=563} [2024-06-21 21:36:14,603 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 318 predicate places. [2024-06-21 21:36:14,603 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 563 transitions, 8718 flow [2024-06-21 21:36:14,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:14,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:14,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:14,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 21:36:14,603 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)] === [2024-06-21 21:36:14,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:14,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1226712329, now seen corresponding path program 1 times [2024-06-21 21:36:14,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:14,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938280563] [2024-06-21 21:36:14,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:14,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:15,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:15,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938280563] [2024-06-21 21:36:15,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938280563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:15,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:15,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:15,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438243595] [2024-06-21 21:36:15,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:15,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:15,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:15,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:15,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:15,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:36:15,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 563 transitions, 8718 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:36:15,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:15,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:36:15,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:16,800 INFO L124 PetriNetUnfolderBase]: 4260/6504 cut-off events. [2024-06-21 21:36:16,801 INFO L125 PetriNetUnfolderBase]: For 713767/713771 co-relation queries the response was YES. [2024-06-21 21:36:16,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58917 conditions, 6504 events. 4260/6504 cut-off events. For 713767/713771 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 37137 event pairs, 1234 based on Foata normal form. 6/6508 useless extension candidates. Maximal degree in co-relation 58744. Up to 6386 conditions per place. [2024-06-21 21:36:16,898 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 545 selfloop transitions, 49 changer transitions 0/597 dead transitions. [2024-06-21 21:36:16,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 597 transitions, 10375 flow [2024-06-21 21:36:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:16,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 21:36:16,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:36:16,899 INFO L175 Difference]: Start difference. First operand has 359 places, 563 transitions, 8718 flow. Second operand 9 states and 144 transitions. [2024-06-21 21:36:16,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 597 transitions, 10375 flow [2024-06-21 21:36:18,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 597 transitions, 10169 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 21:36:18,930 INFO L231 Difference]: Finished difference. Result has 363 places, 572 transitions, 8831 flow [2024-06-21 21:36:18,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8512, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8831, PETRI_PLACES=363, PETRI_TRANSITIONS=572} [2024-06-21 21:36:18,931 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 322 predicate places. [2024-06-21 21:36:18,931 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 572 transitions, 8831 flow [2024-06-21 21:36:18,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:36:18,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:18,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:18,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 21:36:18,932 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)] === [2024-06-21 21:36:18,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:18,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1789902437, now seen corresponding path program 1 times [2024-06-21 21:36:18,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:18,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058992725] [2024-06-21 21:36:18,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:18,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:19,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:19,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058992725] [2024-06-21 21:36:19,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058992725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:19,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:19,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:19,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673837594] [2024-06-21 21:36:19,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:19,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:19,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:19,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:19,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:19,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:36:19,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 572 transitions, 8831 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:19,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:19,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:36:19,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:21,141 INFO L124 PetriNetUnfolderBase]: 4265/6511 cut-off events. [2024-06-21 21:36:21,141 INFO L125 PetriNetUnfolderBase]: For 724203/724207 co-relation queries the response was YES. [2024-06-21 21:36:21,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58961 conditions, 6511 events. 4265/6511 cut-off events. For 724203/724207 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 37185 event pairs, 1232 based on Foata normal form. 5/6514 useless extension candidates. Maximal degree in co-relation 58787. Up to 6422 conditions per place. [2024-06-21 21:36:21,244 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 558 selfloop transitions, 36 changer transitions 0/597 dead transitions. [2024-06-21 21:36:21,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 597 transitions, 10176 flow [2024-06-21 21:36:21,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:21,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-21 21:36:21,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38055555555555554 [2024-06-21 21:36:21,245 INFO L175 Difference]: Start difference. First operand has 363 places, 572 transitions, 8831 flow. Second operand 9 states and 137 transitions. [2024-06-21 21:36:21,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 597 transitions, 10176 flow [2024-06-21 21:36:23,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 597 transitions, 10029 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-21 21:36:23,025 INFO L231 Difference]: Finished difference. Result has 369 places, 575 transitions, 8849 flow [2024-06-21 21:36:23,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8684, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8849, PETRI_PLACES=369, PETRI_TRANSITIONS=575} [2024-06-21 21:36:23,025 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-21 21:36:23,026 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 575 transitions, 8849 flow [2024-06-21 21:36:23,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:23,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:23,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:23,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 21:36:23,026 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)] === [2024-06-21 21:36:23,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:23,026 INFO L85 PathProgramCache]: Analyzing trace with hash -478411101, now seen corresponding path program 2 times [2024-06-21 21:36:23,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:23,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175268206] [2024-06-21 21:36:23,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:23,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:23,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:23,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175268206] [2024-06-21 21:36:23,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175268206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:23,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:23,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:23,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120578390] [2024-06-21 21:36:23,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:23,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:23,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:23,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:23,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:23,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:36:23,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 575 transitions, 8849 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:36:23,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:23,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:36:23,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:25,338 INFO L124 PetriNetUnfolderBase]: 4275/6525 cut-off events. [2024-06-21 21:36:25,338 INFO L125 PetriNetUnfolderBase]: For 743791/743795 co-relation queries the response was YES. [2024-06-21 21:36:25,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59205 conditions, 6525 events. 4275/6525 cut-off events. For 743791/743795 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 37221 event pairs, 1228 based on Foata normal form. 6/6529 useless extension candidates. Maximal degree in co-relation 59030. Up to 6433 conditions per place. [2024-06-21 21:36:25,424 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 555 selfloop transitions, 40 changer transitions 0/598 dead transitions. [2024-06-21 21:36:25,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 598 transitions, 10178 flow [2024-06-21 21:36:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:25,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-21 21:36:25,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 21:36:25,425 INFO L175 Difference]: Start difference. First operand has 369 places, 575 transitions, 8849 flow. Second operand 9 states and 135 transitions. [2024-06-21 21:36:25,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 598 transitions, 10178 flow [2024-06-21 21:36:27,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 598 transitions, 10051 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 21:36:27,289 INFO L231 Difference]: Finished difference. Result has 373 places, 578 transitions, 8883 flow [2024-06-21 21:36:27,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8722, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8883, PETRI_PLACES=373, PETRI_TRANSITIONS=578} [2024-06-21 21:36:27,290 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-21 21:36:27,290 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 578 transitions, 8883 flow [2024-06-21 21:36:27,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:36:27,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:27,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:27,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 21:36:27,290 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)] === [2024-06-21 21:36:27,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:27,290 INFO L85 PathProgramCache]: Analyzing trace with hash 25284561, now seen corresponding path program 7 times [2024-06-21 21:36:27,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:27,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252340936] [2024-06-21 21:36:27,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:27,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:27,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:27,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252340936] [2024-06-21 21:36:27,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252340936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:27,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:27,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:27,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281472550] [2024-06-21 21:36:27,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:27,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:27,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:27,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:27,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:27,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:36:27,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 578 transitions, 8883 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:36:27,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:27,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:36:27,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:29,500 INFO L124 PetriNetUnfolderBase]: 4269/6513 cut-off events. [2024-06-21 21:36:29,500 INFO L125 PetriNetUnfolderBase]: For 753190/753198 co-relation queries the response was YES. [2024-06-21 21:36:29,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59068 conditions, 6513 events. 4269/6513 cut-off events. For 753190/753198 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 36986 event pairs, 825 based on Foata normal form. 10/6521 useless extension candidates. Maximal degree in co-relation 58893. Up to 6310 conditions per place. [2024-06-21 21:36:29,607 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 517 selfloop transitions, 78 changer transitions 0/598 dead transitions. [2024-06-21 21:36:29,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 598 transitions, 10143 flow [2024-06-21 21:36:29,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:29,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-21 21:36:29,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861111111111111 [2024-06-21 21:36:29,609 INFO L175 Difference]: Start difference. First operand has 373 places, 578 transitions, 8883 flow. Second operand 9 states and 139 transitions. [2024-06-21 21:36:29,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 598 transitions, 10143 flow [2024-06-21 21:36:31,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 598 transitions, 9991 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 21:36:31,914 INFO L231 Difference]: Finished difference. Result has 375 places, 578 transitions, 8893 flow [2024-06-21 21:36:31,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8731, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8893, PETRI_PLACES=375, PETRI_TRANSITIONS=578} [2024-06-21 21:36:31,914 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 334 predicate places. [2024-06-21 21:36:31,914 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 578 transitions, 8893 flow [2024-06-21 21:36:31,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:36:31,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:31,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:31,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 21:36:31,915 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)] === [2024-06-21 21:36:31,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:31,915 INFO L85 PathProgramCache]: Analyzing trace with hash 25404717, now seen corresponding path program 2 times [2024-06-21 21:36:31,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:31,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366849849] [2024-06-21 21:36:31,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:31,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:32,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:32,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366849849] [2024-06-21 21:36:32,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366849849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:32,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:32,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:32,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064742195] [2024-06-21 21:36:32,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:32,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:32,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:32,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:32,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:32,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:36:32,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 578 transitions, 8893 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:36:32,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:32,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:36:32,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:34,073 INFO L124 PetriNetUnfolderBase]: 4274/6524 cut-off events. [2024-06-21 21:36:34,073 INFO L125 PetriNetUnfolderBase]: For 766129/766133 co-relation queries the response was YES. [2024-06-21 21:36:34,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59348 conditions, 6524 events. 4274/6524 cut-off events. For 766129/766133 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 37235 event pairs, 1230 based on Foata normal form. 5/6527 useless extension candidates. Maximal degree in co-relation 59172. Up to 6447 conditions per place. [2024-06-21 21:36:34,175 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 566 selfloop transitions, 31 changer transitions 0/600 dead transitions. [2024-06-21 21:36:34,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 600 transitions, 10236 flow [2024-06-21 21:36:34,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:34,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:34,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-21 21:36:34,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-21 21:36:34,177 INFO L175 Difference]: Start difference. First operand has 375 places, 578 transitions, 8893 flow. Second operand 9 states and 132 transitions. [2024-06-21 21:36:34,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 600 transitions, 10236 flow [2024-06-21 21:36:36,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 600 transitions, 10104 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 21:36:36,024 INFO L231 Difference]: Finished difference. Result has 380 places, 581 transitions, 8922 flow [2024-06-21 21:36:36,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8761, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8922, PETRI_PLACES=380, PETRI_TRANSITIONS=581} [2024-06-21 21:36:36,025 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 339 predicate places. [2024-06-21 21:36:36,025 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 581 transitions, 8922 flow [2024-06-21 21:36:36,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:36:36,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:36,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:36,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 21:36:36,025 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)] === [2024-06-21 21:36:36,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:36,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1425437331, now seen corresponding path program 3 times [2024-06-21 21:36:36,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:36,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182949608] [2024-06-21 21:36:36,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:36,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:36,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:36,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182949608] [2024-06-21 21:36:36,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182949608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:36,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:36,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:36,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104923912] [2024-06-21 21:36:36,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:36,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:36,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:36,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:36,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:36,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:36:36,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 581 transitions, 8922 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:36,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:36,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:36:36,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:38,221 INFO L124 PetriNetUnfolderBase]: 4268/6516 cut-off events. [2024-06-21 21:36:38,221 INFO L125 PetriNetUnfolderBase]: For 777851/777855 co-relation queries the response was YES. [2024-06-21 21:36:38,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59154 conditions, 6516 events. 4268/6516 cut-off events. For 777851/777855 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 37194 event pairs, 1230 based on Foata normal form. 6/6520 useless extension candidates. Maximal degree in co-relation 58976. Up to 6415 conditions per place. [2024-06-21 21:36:38,313 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 554 selfloop transitions, 45 changer transitions 0/602 dead transitions. [2024-06-21 21:36:38,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 602 transitions, 10198 flow [2024-06-21 21:36:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:38,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:38,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-21 21:36:38,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-21 21:36:38,314 INFO L175 Difference]: Start difference. First operand has 380 places, 581 transitions, 8922 flow. Second operand 9 states and 138 transitions. [2024-06-21 21:36:38,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 602 transitions, 10198 flow [2024-06-21 21:36:40,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 602 transitions, 10047 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 21:36:40,113 INFO L231 Difference]: Finished difference. Result has 383 places, 581 transitions, 8867 flow [2024-06-21 21:36:40,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8771, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8867, PETRI_PLACES=383, PETRI_TRANSITIONS=581} [2024-06-21 21:36:40,114 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-21 21:36:40,114 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 581 transitions, 8867 flow [2024-06-21 21:36:40,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:40,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:40,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:40,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 21:36:40,114 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)] === [2024-06-21 21:36:40,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:40,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1049581181, now seen corresponding path program 8 times [2024-06-21 21:36:40,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:40,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794037231] [2024-06-21 21:36:40,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:40,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:40,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:40,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794037231] [2024-06-21 21:36:40,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794037231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:40,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:40,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:40,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105347789] [2024-06-21 21:36:40,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:40,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:40,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:40,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:40,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:40,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:36:40,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 581 transitions, 8867 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:36:40,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:40,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:36:40,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:42,336 INFO L124 PetriNetUnfolderBase]: 4262/6505 cut-off events. [2024-06-21 21:36:42,337 INFO L125 PetriNetUnfolderBase]: For 785295/785303 co-relation queries the response was YES. [2024-06-21 21:36:42,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59029 conditions, 6505 events. 4262/6505 cut-off events. For 785295/785303 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 36962 event pairs, 829 based on Foata normal form. 10/6513 useless extension candidates. Maximal degree in co-relation 58850. Up to 6268 conditions per place. [2024-06-21 21:36:42,444 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 506 selfloop transitions, 94 changer transitions 0/603 dead transitions. [2024-06-21 21:36:42,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 603 transitions, 10325 flow [2024-06-21 21:36:42,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:42,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:42,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 21:36:42,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-06-21 21:36:42,445 INFO L175 Difference]: Start difference. First operand has 383 places, 581 transitions, 8867 flow. Second operand 9 states and 142 transitions. [2024-06-21 21:36:42,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 603 transitions, 10325 flow [2024-06-21 21:36:44,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 603 transitions, 10181 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 21:36:44,534 INFO L231 Difference]: Finished difference. Result has 384 places, 581 transitions, 8917 flow [2024-06-21 21:36:44,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8723, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8917, PETRI_PLACES=384, PETRI_TRANSITIONS=581} [2024-06-21 21:36:44,535 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 343 predicate places. [2024-06-21 21:36:44,535 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 581 transitions, 8917 flow [2024-06-21 21:36:44,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:36:44,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:44,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:44,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 21:36:44,536 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)] === [2024-06-21 21:36:44,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:44,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1049334731, now seen corresponding path program 1 times [2024-06-21 21:36:44,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:44,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130736192] [2024-06-21 21:36:44,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:44,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:45,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:45,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130736192] [2024-06-21 21:36:45,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130736192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:45,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:45,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:36:45,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156135528] [2024-06-21 21:36:45,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:45,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:36:45,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:45,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:36:45,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:36:45,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:36:45,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 581 transitions, 8917 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:45,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:45,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:36:45,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:47,309 INFO L124 PetriNetUnfolderBase]: 4275/6527 cut-off events. [2024-06-21 21:36:47,309 INFO L125 PetriNetUnfolderBase]: For 803147/803151 co-relation queries the response was YES. [2024-06-21 21:36:47,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59436 conditions, 6527 events. 4275/6527 cut-off events. For 803147/803151 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 37264 event pairs, 1232 based on Foata normal form. 6/6531 useless extension candidates. Maximal degree in co-relation 59256. Up to 6418 conditions per place. [2024-06-21 21:36:47,414 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 554 selfloop transitions, 49 changer transitions 0/606 dead transitions. [2024-06-21 21:36:47,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 606 transitions, 10264 flow [2024-06-21 21:36:47,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:47,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-21 21:36:47,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38055555555555554 [2024-06-21 21:36:47,415 INFO L175 Difference]: Start difference. First operand has 384 places, 581 transitions, 8917 flow. Second operand 9 states and 137 transitions. [2024-06-21 21:36:47,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 606 transitions, 10264 flow [2024-06-21 21:36:49,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 606 transitions, 10118 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:36:49,554 INFO L231 Difference]: Finished difference. Result has 388 places, 586 transitions, 8955 flow [2024-06-21 21:36:49,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8771, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8955, PETRI_PLACES=388, PETRI_TRANSITIONS=586} [2024-06-21 21:36:49,555 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 347 predicate places. [2024-06-21 21:36:49,555 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 586 transitions, 8955 flow [2024-06-21 21:36:49,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:49,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:49,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:49,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 21:36:49,556 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)] === [2024-06-21 21:36:49,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:49,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1921063247, now seen corresponding path program 4 times [2024-06-21 21:36:49,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:49,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459184495] [2024-06-21 21:36:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:49,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:50,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:50,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:50,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459184495] [2024-06-21 21:36:50,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459184495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:50,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:50,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:36:50,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473379221] [2024-06-21 21:36:50,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:50,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:36:50,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:50,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:36:50,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:36:50,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:36:50,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 586 transitions, 8955 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:50,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:50,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:36:50,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:52,419 INFO L124 PetriNetUnfolderBase]: 4387/6690 cut-off events. [2024-06-21 21:36:52,419 INFO L125 PetriNetUnfolderBase]: For 823846/823858 co-relation queries the response was YES. [2024-06-21 21:36:52,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61068 conditions, 6690 events. 4387/6690 cut-off events. For 823846/823858 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 38137 event pairs, 840 based on Foata normal form. 10/6688 useless extension candidates. Maximal degree in co-relation 60887. Up to 6356 conditions per place. [2024-06-21 21:36:52,520 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 545 selfloop transitions, 105 changer transitions 0/653 dead transitions. [2024-06-21 21:36:52,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 653 transitions, 11355 flow [2024-06-21 21:36:52,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:52,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:52,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 21:36:52,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-21 21:36:52,522 INFO L175 Difference]: Start difference. First operand has 388 places, 586 transitions, 8955 flow. Second operand 9 states and 141 transitions. [2024-06-21 21:36:52,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 653 transitions, 11355 flow [2024-06-21 21:36:54,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 653 transitions, 11234 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 21:36:54,748 INFO L231 Difference]: Finished difference. Result has 394 places, 620 transitions, 9812 flow [2024-06-21 21:36:54,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8845, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9812, PETRI_PLACES=394, PETRI_TRANSITIONS=620} [2024-06-21 21:36:54,749 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 353 predicate places. [2024-06-21 21:36:54,749 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 620 transitions, 9812 flow [2024-06-21 21:36:54,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:54,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:54,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:54,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 21:36:54,750 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)] === [2024-06-21 21:36:54,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:54,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1923923183, now seen corresponding path program 9 times [2024-06-21 21:36:54,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:54,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490740823] [2024-06-21 21:36:54,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:54,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:55,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:55,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490740823] [2024-06-21 21:36:55,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490740823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:55,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:55,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:55,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175932325] [2024-06-21 21:36:55,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:55,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:55,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:55,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:55,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:55,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:36:55,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 620 transitions, 9812 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:36:55,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:55,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:36:55,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:57,076 INFO L124 PetriNetUnfolderBase]: 4413/6728 cut-off events. [2024-06-21 21:36:57,076 INFO L125 PetriNetUnfolderBase]: For 851126/851136 co-relation queries the response was YES. [2024-06-21 21:36:57,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62017 conditions, 6728 events. 4413/6728 cut-off events. For 851126/851136 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 38533 event pairs, 891 based on Foata normal form. 12/6738 useless extension candidates. Maximal degree in co-relation 61833. Up to 6334 conditions per place. [2024-06-21 21:36:57,181 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 511 selfloop transitions, 138 changer transitions 0/652 dead transitions. [2024-06-21 21:36:57,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 652 transitions, 11508 flow [2024-06-21 21:36:57,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:36:57,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:36:57,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 21:36:57,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 21:36:57,182 INFO L175 Difference]: Start difference. First operand has 394 places, 620 transitions, 9812 flow. Second operand 8 states and 132 transitions. [2024-06-21 21:36:57,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 652 transitions, 11508 flow [2024-06-21 21:36:59,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 652 transitions, 11407 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 21:36:59,235 INFO L231 Difference]: Finished difference. Result has 399 places, 626 transitions, 10124 flow [2024-06-21 21:36:59,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9711, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10124, PETRI_PLACES=399, PETRI_TRANSITIONS=626} [2024-06-21 21:36:59,236 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 358 predicate places. [2024-06-21 21:36:59,236 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 626 transitions, 10124 flow [2024-06-21 21:36:59,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:36:59,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:59,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:59,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 21:36:59,237 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)] === [2024-06-21 21:36:59,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:59,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1921302257, now seen corresponding path program 5 times [2024-06-21 21:36:59,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:59,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874478135] [2024-06-21 21:36:59,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:59,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:59,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:00,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:00,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874478135] [2024-06-21 21:37:00,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874478135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:00,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:00,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:37:00,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934583078] [2024-06-21 21:37:00,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:00,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:37:00,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:00,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:37:00,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:37:00,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:37:00,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 626 transitions, 10124 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:00,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:00,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:37:00,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:02,364 INFO L124 PetriNetUnfolderBase]: 4429/6752 cut-off events. [2024-06-21 21:37:02,364 INFO L125 PetriNetUnfolderBase]: For 873236/873245 co-relation queries the response was YES. [2024-06-21 21:37:02,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62898 conditions, 6752 events. 4429/6752 cut-off events. For 873236/873245 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 38572 event pairs, 851 based on Foata normal form. 8/6748 useless extension candidates. Maximal degree in co-relation 62713. Up to 6502 conditions per place. [2024-06-21 21:37:02,469 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 558 selfloop transitions, 97 changer transitions 0/658 dead transitions. [2024-06-21 21:37:02,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 658 transitions, 11709 flow [2024-06-21 21:37:02,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:37:02,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:37:02,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-21 21:37:02,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-21 21:37:02,470 INFO L175 Difference]: Start difference. First operand has 399 places, 626 transitions, 10124 flow. Second operand 9 states and 136 transitions. [2024-06-21 21:37:02,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 658 transitions, 11709 flow [2024-06-21 21:37:04,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 658 transitions, 11505 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 21:37:04,892 INFO L231 Difference]: Finished difference. Result has 404 places, 633 transitions, 10298 flow [2024-06-21 21:37:04,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9934, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10298, PETRI_PLACES=404, PETRI_TRANSITIONS=633} [2024-06-21 21:37:04,892 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 363 predicate places. [2024-06-21 21:37:04,892 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 633 transitions, 10298 flow [2024-06-21 21:37:04,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:04,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:04,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:04,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 21:37:04,893 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)] === [2024-06-21 21:37:04,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:04,893 INFO L85 PathProgramCache]: Analyzing trace with hash 2034895433, now seen corresponding path program 10 times [2024-06-21 21:37:04,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:04,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226638322] [2024-06-21 21:37:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:04,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:05,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:05,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226638322] [2024-06-21 21:37:05,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226638322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:05,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:05,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:05,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349464601] [2024-06-21 21:37:05,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:05,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:05,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:05,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:05,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:05,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:37:05,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 633 transitions, 10298 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:05,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:05,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:37:05,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:07,228 INFO L124 PetriNetUnfolderBase]: 4439/6765 cut-off events. [2024-06-21 21:37:07,228 INFO L125 PetriNetUnfolderBase]: For 856960/856968 co-relation queries the response was YES. [2024-06-21 21:37:07,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62964 conditions, 6765 events. 4439/6765 cut-off events. For 856960/856968 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 38708 event pairs, 949 based on Foata normal form. 10/6773 useless extension candidates. Maximal degree in co-relation 62777. Up to 6500 conditions per place. [2024-06-21 21:37:07,346 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 540 selfloop transitions, 115 changer transitions 0/658 dead transitions. [2024-06-21 21:37:07,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 658 transitions, 11742 flow [2024-06-21 21:37:07,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:07,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:07,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 21:37:07,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-21 21:37:07,347 INFO L175 Difference]: Start difference. First operand has 404 places, 633 transitions, 10298 flow. Second operand 8 states and 126 transitions. [2024-06-21 21:37:07,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 658 transitions, 11742 flow [2024-06-21 21:37:10,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 658 transitions, 11495 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 21:37:10,125 INFO L231 Difference]: Finished difference. Result has 405 places, 637 transitions, 10363 flow [2024-06-21 21:37:10,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10051, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10363, PETRI_PLACES=405, PETRI_TRANSITIONS=637} [2024-06-21 21:37:10,125 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 364 predicate places. [2024-06-21 21:37:10,125 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 637 transitions, 10363 flow [2024-06-21 21:37:10,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:10,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:10,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:10,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 21:37:10,126 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)] === [2024-06-21 21:37:10,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:10,126 INFO L85 PathProgramCache]: Analyzing trace with hash 2039214353, now seen corresponding path program 11 times [2024-06-21 21:37:10,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:10,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690102519] [2024-06-21 21:37:10,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:10,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:10,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:10,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690102519] [2024-06-21 21:37:10,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690102519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:10,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:10,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:10,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563629069] [2024-06-21 21:37:10,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:10,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:10,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:10,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:10,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:10,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:37:10,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 637 transitions, 10363 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:10,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:10,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:37:10,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:12,428 INFO L124 PetriNetUnfolderBase]: 4473/6810 cut-off events. [2024-06-21 21:37:12,428 INFO L125 PetriNetUnfolderBase]: For 886542/886546 co-relation queries the response was YES. [2024-06-21 21:37:12,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63958 conditions, 6810 events. 4473/6810 cut-off events. For 886542/886546 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 38935 event pairs, 819 based on Foata normal form. 6/6814 useless extension candidates. Maximal degree in co-relation 63770. Up to 6234 conditions per place. [2024-06-21 21:37:12,540 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 493 selfloop transitions, 176 changer transitions 0/672 dead transitions. [2024-06-21 21:37:12,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 672 transitions, 12365 flow [2024-06-21 21:37:12,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:12,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 21:37:12,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-21 21:37:12,541 INFO L175 Difference]: Start difference. First operand has 405 places, 637 transitions, 10363 flow. Second operand 8 states and 133 transitions. [2024-06-21 21:37:12,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 672 transitions, 12365 flow [2024-06-21 21:37:15,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 672 transitions, 12149 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 21:37:15,163 INFO L231 Difference]: Finished difference. Result has 407 places, 646 transitions, 10709 flow [2024-06-21 21:37:15,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10155, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10709, PETRI_PLACES=407, PETRI_TRANSITIONS=646} [2024-06-21 21:37:15,164 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-21 21:37:15,164 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 646 transitions, 10709 flow [2024-06-21 21:37:15,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:15,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:15,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:15,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 21:37:15,164 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)] === [2024-06-21 21:37:15,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:15,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2039513069, now seen corresponding path program 3 times [2024-06-21 21:37:15,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:15,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270253792] [2024-06-21 21:37:15,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:15,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:15,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:15,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270253792] [2024-06-21 21:37:15,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270253792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:15,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:15,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:15,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266057706] [2024-06-21 21:37:15,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:15,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:15,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:15,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:15,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:15,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:37:15,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 646 transitions, 10709 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:15,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:15,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:37:15,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:17,592 INFO L124 PetriNetUnfolderBase]: 4478/6821 cut-off events. [2024-06-21 21:37:17,592 INFO L125 PetriNetUnfolderBase]: For 870219/870223 co-relation queries the response was YES. [2024-06-21 21:37:17,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64437 conditions, 6821 events. 4478/6821 cut-off events. For 870219/870223 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 39119 event pairs, 1255 based on Foata normal form. 5/6824 useless extension candidates. Maximal degree in co-relation 64250. Up to 6699 conditions per place. [2024-06-21 21:37:17,705 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 610 selfloop transitions, 54 changer transitions 0/667 dead transitions. [2024-06-21 21:37:17,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 667 transitions, 12194 flow [2024-06-21 21:37:17,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:17,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:17,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-21 21:37:17,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2024-06-21 21:37:17,707 INFO L175 Difference]: Start difference. First operand has 407 places, 646 transitions, 10709 flow. Second operand 8 states and 121 transitions. [2024-06-21 21:37:17,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 667 transitions, 12194 flow [2024-06-21 21:37:20,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 667 transitions, 12011 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-21 21:37:20,154 INFO L231 Difference]: Finished difference. Result has 411 places, 649 transitions, 10743 flow [2024-06-21 21:37:20,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10526, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10743, PETRI_PLACES=411, PETRI_TRANSITIONS=649} [2024-06-21 21:37:20,154 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 370 predicate places. [2024-06-21 21:37:20,155 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 649 transitions, 10743 flow [2024-06-21 21:37:20,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:20,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:20,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:20,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 21:37:20,155 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)] === [2024-06-21 21:37:20,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:20,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2039513255, now seen corresponding path program 4 times [2024-06-21 21:37:20,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:20,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325095718] [2024-06-21 21:37:20,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:20,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:20,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:20,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325095718] [2024-06-21 21:37:20,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325095718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:20,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:20,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:20,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311795186] [2024-06-21 21:37:20,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:20,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:20,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:20,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:20,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:20,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:37:20,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 649 transitions, 10743 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:20,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:20,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:37:20,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:22,510 INFO L124 PetriNetUnfolderBase]: 4520/6879 cut-off events. [2024-06-21 21:37:22,510 INFO L125 PetriNetUnfolderBase]: For 888334/888338 co-relation queries the response was YES. [2024-06-21 21:37:22,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64869 conditions, 6879 events. 4520/6879 cut-off events. For 888334/888338 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 39474 event pairs, 1253 based on Foata normal form. 6/6883 useless extension candidates. Maximal degree in co-relation 64681. Up to 6694 conditions per place. [2024-06-21 21:37:22,617 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 600 selfloop transitions, 76 changer transitions 0/679 dead transitions. [2024-06-21 21:37:22,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 679 transitions, 12629 flow [2024-06-21 21:37:22,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:22,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 21:37:22,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 21:37:22,618 INFO L175 Difference]: Start difference. First operand has 411 places, 649 transitions, 10743 flow. Second operand 8 states and 127 transitions. [2024-06-21 21:37:22,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 679 transitions, 12629 flow [2024-06-21 21:37:25,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 679 transitions, 12457 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 21:37:25,383 INFO L231 Difference]: Finished difference. Result has 414 places, 658 transitions, 11053 flow [2024-06-21 21:37:25,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10573, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11053, PETRI_PLACES=414, PETRI_TRANSITIONS=658} [2024-06-21 21:37:25,383 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 373 predicate places. [2024-06-21 21:37:25,384 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 658 transitions, 11053 flow [2024-06-21 21:37:25,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:25,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:25,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:25,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 21:37:25,384 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)] === [2024-06-21 21:37:25,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:25,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1555132359, now seen corresponding path program 12 times [2024-06-21 21:37:25,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:25,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477885806] [2024-06-21 21:37:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:25,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:25,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:25,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:25,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477885806] [2024-06-21 21:37:25,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477885806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:25,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:25,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:37:25,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437167659] [2024-06-21 21:37:25,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:25,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:37:25,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:25,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:37:25,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:37:26,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:37:26,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 658 transitions, 11053 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:37:26,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:26,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:37:26,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:27,921 INFO L124 PetriNetUnfolderBase]: 4538/6900 cut-off events. [2024-06-21 21:37:27,922 INFO L125 PetriNetUnfolderBase]: For 892779/892783 co-relation queries the response was YES. [2024-06-21 21:37:27,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65338 conditions, 6900 events. 4538/6900 cut-off events. For 892779/892783 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 39451 event pairs, 809 based on Foata normal form. 6/6904 useless extension candidates. Maximal degree in co-relation 65148. Up to 6318 conditions per place. [2024-06-21 21:37:28,021 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 496 selfloop transitions, 188 changer transitions 0/687 dead transitions. [2024-06-21 21:37:28,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 687 transitions, 12985 flow [2024-06-21 21:37:28,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 21:37:28,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 21:37:28,023 INFO L175 Difference]: Start difference. First operand has 414 places, 658 transitions, 11053 flow. Second operand 8 states and 130 transitions. [2024-06-21 21:37:28,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 687 transitions, 12985 flow [2024-06-21 21:37:30,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 687 transitions, 12815 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-21 21:37:30,685 INFO L231 Difference]: Finished difference. Result has 417 places, 664 transitions, 11377 flow [2024-06-21 21:37:30,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10887, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11377, PETRI_PLACES=417, PETRI_TRANSITIONS=664} [2024-06-21 21:37:30,686 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 376 predicate places. [2024-06-21 21:37:30,686 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 664 transitions, 11377 flow [2024-06-21 21:37:30,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:37:30,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:30,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:30,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 21:37:30,686 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)] === [2024-06-21 21:37:30,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:30,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2078442863, now seen corresponding path program 13 times [2024-06-21 21:37:30,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:30,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742193469] [2024-06-21 21:37:30,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:30,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:30,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:31,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:31,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:31,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742193469] [2024-06-21 21:37:31,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742193469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:31,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:31,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:31,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52389082] [2024-06-21 21:37:31,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:31,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:31,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:31,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:31,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:31,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:37:31,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 664 transitions, 11377 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:31,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:31,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:37:31,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:33,123 INFO L124 PetriNetUnfolderBase]: 4548/6914 cut-off events. [2024-06-21 21:37:33,123 INFO L125 PetriNetUnfolderBase]: For 892715/892719 co-relation queries the response was YES. [2024-06-21 21:37:33,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65850 conditions, 6914 events. 4548/6914 cut-off events. For 892715/892719 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 39526 event pairs, 846 based on Foata normal form. 6/6918 useless extension candidates. Maximal degree in co-relation 65659. Up to 6665 conditions per place. [2024-06-21 21:37:33,236 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 577 selfloop transitions, 104 changer transitions 0/684 dead transitions. [2024-06-21 21:37:33,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 684 transitions, 12872 flow [2024-06-21 21:37:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:33,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:33,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-21 21:37:33,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-21 21:37:33,237 INFO L175 Difference]: Start difference. First operand has 417 places, 664 transitions, 11377 flow. Second operand 8 states and 122 transitions. [2024-06-21 21:37:33,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 684 transitions, 12872 flow [2024-06-21 21:37:36,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 684 transitions, 12613 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 21:37:36,320 INFO L231 Difference]: Finished difference. Result has 421 places, 668 transitions, 11431 flow [2024-06-21 21:37:36,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11121, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11431, PETRI_PLACES=421, PETRI_TRANSITIONS=668} [2024-06-21 21:37:36,321 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 380 predicate places. [2024-06-21 21:37:36,321 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 668 transitions, 11431 flow [2024-06-21 21:37:36,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:36,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:36,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:36,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 21:37:36,322 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)] === [2024-06-21 21:37:36,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:36,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2078322707, now seen corresponding path program 4 times [2024-06-21 21:37:36,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:36,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653700416] [2024-06-21 21:37:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:36,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:36,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:36,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653700416] [2024-06-21 21:37:36,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653700416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:36,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:36,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:36,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98086351] [2024-06-21 21:37:36,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:36,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:36,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:36,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:36,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:37,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:37:37,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 668 transitions, 11431 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:37,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:37,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:37:37,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:38,842 INFO L124 PetriNetUnfolderBase]: 4553/6925 cut-off events. [2024-06-21 21:37:38,843 INFO L125 PetriNetUnfolderBase]: For 889517/889521 co-relation queries the response was YES. [2024-06-21 21:37:38,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65739 conditions, 6925 events. 4553/6925 cut-off events. For 889517/889521 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 39781 event pairs, 1255 based on Foata normal form. 5/6928 useless extension candidates. Maximal degree in co-relation 65547. Up to 6833 conditions per place. [2024-06-21 21:37:38,949 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 642 selfloop transitions, 41 changer transitions 0/686 dead transitions. [2024-06-21 21:37:38,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 686 transitions, 12940 flow [2024-06-21 21:37:38,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:38,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:38,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-21 21:37:38,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.365625 [2024-06-21 21:37:38,950 INFO L175 Difference]: Start difference. First operand has 421 places, 668 transitions, 11431 flow. Second operand 8 states and 117 transitions. [2024-06-21 21:37:38,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 686 transitions, 12940 flow [2024-06-21 21:37:42,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 686 transitions, 12764 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 21:37:42,040 INFO L231 Difference]: Finished difference. Result has 424 places, 671 transitions, 11446 flow [2024-06-21 21:37:42,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11255, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11446, PETRI_PLACES=424, PETRI_TRANSITIONS=671} [2024-06-21 21:37:42,040 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 383 predicate places. [2024-06-21 21:37:42,041 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 671 transitions, 11446 flow [2024-06-21 21:37:42,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:42,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:42,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:42,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 21:37:42,041 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)] === [2024-06-21 21:37:42,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:42,041 INFO L85 PathProgramCache]: Analyzing trace with hash -373734971, now seen corresponding path program 5 times [2024-06-21 21:37:42,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:42,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814188926] [2024-06-21 21:37:42,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:42,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:42,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:42,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814188926] [2024-06-21 21:37:42,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814188926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:42,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:42,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:42,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19199994] [2024-06-21 21:37:42,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:42,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:42,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:42,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:42,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:42,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:37:42,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 671 transitions, 11446 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:42,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:42,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:37:42,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:44,327 INFO L124 PetriNetUnfolderBase]: 4563/6939 cut-off events. [2024-06-21 21:37:44,327 INFO L125 PetriNetUnfolderBase]: For 893077/893081 co-relation queries the response was YES. [2024-06-21 21:37:44,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65754 conditions, 6939 events. 4563/6939 cut-off events. For 893077/893081 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 39857 event pairs, 1256 based on Foata normal form. 6/6943 useless extension candidates. Maximal degree in co-relation 65562. Up to 6832 conditions per place. [2024-06-21 21:37:44,441 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 639 selfloop transitions, 48 changer transitions 0/690 dead transitions. [2024-06-21 21:37:44,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 690 transitions, 12962 flow [2024-06-21 21:37:44,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:44,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:44,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-21 21:37:44,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 21:37:44,442 INFO L175 Difference]: Start difference. First operand has 424 places, 671 transitions, 11446 flow. Second operand 8 states and 120 transitions. [2024-06-21 21:37:44,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 690 transitions, 12962 flow [2024-06-21 21:37:46,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 690 transitions, 12818 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 21:37:46,949 INFO L231 Difference]: Finished difference. Result has 426 places, 674 transitions, 11498 flow [2024-06-21 21:37:46,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11302, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11498, PETRI_PLACES=426, PETRI_TRANSITIONS=674} [2024-06-21 21:37:46,950 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 385 predicate places. [2024-06-21 21:37:46,950 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 674 transitions, 11498 flow [2024-06-21 21:37:46,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:46,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:46,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:46,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 21:37:46,950 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)] === [2024-06-21 21:37:46,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:46,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2078322893, now seen corresponding path program 14 times [2024-06-21 21:37:46,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:46,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383305954] [2024-06-21 21:37:46,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:46,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:47,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:47,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383305954] [2024-06-21 21:37:47,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383305954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:47,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:47,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:47,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328592952] [2024-06-21 21:37:47,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:47,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:47,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:47,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:47,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:47,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:37:47,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 674 transitions, 11498 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:47,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:47,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:37:47,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:49,361 INFO L124 PetriNetUnfolderBase]: 4581/6960 cut-off events. [2024-06-21 21:37:49,361 INFO L125 PetriNetUnfolderBase]: For 896376/896380 co-relation queries the response was YES. [2024-06-21 21:37:49,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66033 conditions, 6960 events. 4581/6960 cut-off events. For 896376/896380 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 39795 event pairs, 846 based on Foata normal form. 6/6964 useless extension candidates. Maximal degree in co-relation 65840. Up to 6647 conditions per place. [2024-06-21 21:37:49,469 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 566 selfloop transitions, 129 changer transitions 0/698 dead transitions. [2024-06-21 21:37:49,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 698 transitions, 13250 flow [2024-06-21 21:37:49,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:49,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:49,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 21:37:49,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-21 21:37:49,470 INFO L175 Difference]: Start difference. First operand has 426 places, 674 transitions, 11498 flow. Second operand 8 states and 125 transitions. [2024-06-21 21:37:49,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 698 transitions, 13250 flow [2024-06-21 21:37:51,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 698 transitions, 13095 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 21:37:51,940 INFO L231 Difference]: Finished difference. Result has 428 places, 680 transitions, 11783 flow [2024-06-21 21:37:51,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11345, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11783, PETRI_PLACES=428, PETRI_TRANSITIONS=680} [2024-06-21 21:37:51,941 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-21 21:37:51,941 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 680 transitions, 11783 flow [2024-06-21 21:37:51,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:51,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:51,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:51,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 21:37:51,942 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)] === [2024-06-21 21:37:51,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:51,942 INFO L85 PathProgramCache]: Analyzing trace with hash -546462011, now seen corresponding path program 6 times [2024-06-21 21:37:51,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:51,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985295440] [2024-06-21 21:37:51,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:51,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:52,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:52,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985295440] [2024-06-21 21:37:52,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985295440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:52,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:52,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:52,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059101166] [2024-06-21 21:37:52,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:52,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:52,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:52,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:52,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:52,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:37:52,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 680 transitions, 11783 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:52,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:52,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:37:52,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:54,540 INFO L124 PetriNetUnfolderBase]: 4575/6956 cut-off events. [2024-06-21 21:37:54,540 INFO L125 PetriNetUnfolderBase]: For 890232/890236 co-relation queries the response was YES. [2024-06-21 21:37:54,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65996 conditions, 6956 events. 4575/6956 cut-off events. For 890232/890236 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 39976 event pairs, 1255 based on Foata normal form. 6/6960 useless extension candidates. Maximal degree in co-relation 65803. Up to 6829 conditions per place. [2024-06-21 21:37:54,638 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 637 selfloop transitions, 57 changer transitions 0/697 dead transitions. [2024-06-21 21:37:54,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 697 transitions, 13237 flow [2024-06-21 21:37:54,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:54,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 21:37:54,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-21 21:37:54,639 INFO L175 Difference]: Start difference. First operand has 428 places, 680 transitions, 11783 flow. Second operand 8 states and 123 transitions. [2024-06-21 21:37:54,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 697 transitions, 13237 flow [2024-06-21 21:37:57,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 697 transitions, 12995 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 21:37:57,075 INFO L231 Difference]: Finished difference. Result has 430 places, 680 transitions, 11665 flow [2024-06-21 21:37:57,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11541, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11665, PETRI_PLACES=430, PETRI_TRANSITIONS=680} [2024-06-21 21:37:57,076 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 389 predicate places. [2024-06-21 21:37:57,076 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 680 transitions, 11665 flow [2024-06-21 21:37:57,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:57,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:57,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:57,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 21:37:57,076 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)] === [2024-06-21 21:37:57,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:57,076 INFO L85 PathProgramCache]: Analyzing trace with hash -374095439, now seen corresponding path program 6 times [2024-06-21 21:37:57,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:57,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641181944] [2024-06-21 21:37:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:57,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:57,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:58,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:58,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641181944] [2024-06-21 21:37:58,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641181944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:58,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:58,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:37:58,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136444982] [2024-06-21 21:37:58,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:58,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:37:58,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:58,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:37:58,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:37:58,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:37:58,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 680 transitions, 11665 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:58,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:58,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:37:58,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:00,090 INFO L124 PetriNetUnfolderBase]: 4591/6976 cut-off events. [2024-06-21 21:38:00,090 INFO L125 PetriNetUnfolderBase]: For 887779/887783 co-relation queries the response was YES. [2024-06-21 21:38:00,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65935 conditions, 6976 events. 4591/6976 cut-off events. For 887779/887783 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 39928 event pairs, 843 based on Foata normal form. 6/6980 useless extension candidates. Maximal degree in co-relation 65742. Up to 6723 conditions per place. [2024-06-21 21:38:00,216 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 595 selfloop transitions, 102 changer transitions 0/700 dead transitions. [2024-06-21 21:38:00,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 700 transitions, 13165 flow [2024-06-21 21:38:00,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:00,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-21 21:38:00,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-21 21:38:00,217 INFO L175 Difference]: Start difference. First operand has 430 places, 680 transitions, 11665 flow. Second operand 8 states and 122 transitions. [2024-06-21 21:38:00,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 700 transitions, 13165 flow [2024-06-21 21:38:03,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 700 transitions, 12993 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 21:38:03,085 INFO L231 Difference]: Finished difference. Result has 431 places, 684 transitions, 11770 flow [2024-06-21 21:38:03,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11493, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11770, PETRI_PLACES=431, PETRI_TRANSITIONS=684} [2024-06-21 21:38:03,085 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-21 21:38:03,085 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 684 transitions, 11770 flow [2024-06-21 21:38:03,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:03,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:03,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:03,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 21:38:03,086 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)] === [2024-06-21 21:38:03,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:03,086 INFO L85 PathProgramCache]: Analyzing trace with hash -373726043, now seen corresponding path program 2 times [2024-06-21 21:38:03,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:03,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561833406] [2024-06-21 21:38:03,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:03,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:04,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:04,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561833406] [2024-06-21 21:38:04,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561833406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:04,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:04,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:04,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909636651] [2024-06-21 21:38:04,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:04,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:04,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:04,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:04,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:04,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:38:04,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 684 transitions, 11770 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:04,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:04,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:38:04,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:06,295 INFO L124 PetriNetUnfolderBase]: 4599/6992 cut-off events. [2024-06-21 21:38:06,295 INFO L125 PetriNetUnfolderBase]: For 889905/889909 co-relation queries the response was YES. [2024-06-21 21:38:06,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66119 conditions, 6992 events. 4599/6992 cut-off events. For 889905/889909 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 40204 event pairs, 1258 based on Foata normal form. 6/6996 useless extension candidates. Maximal degree in co-relation 65926. Up to 6868 conditions per place. [2024-06-21 21:38:06,404 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 643 selfloop transitions, 56 changer transitions 0/702 dead transitions. [2024-06-21 21:38:06,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 702 transitions, 13278 flow [2024-06-21 21:38:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-21 21:38:06,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-21 21:38:06,405 INFO L175 Difference]: Start difference. First operand has 431 places, 684 transitions, 11770 flow. Second operand 8 states and 122 transitions. [2024-06-21 21:38:06,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 702 transitions, 13278 flow [2024-06-21 21:38:09,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 702 transitions, 13063 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 21:38:09,195 INFO L231 Difference]: Finished difference. Result has 433 places, 686 transitions, 11737 flow [2024-06-21 21:38:09,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11555, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11737, PETRI_PLACES=433, PETRI_TRANSITIONS=686} [2024-06-21 21:38:09,195 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 392 predicate places. [2024-06-21 21:38:09,195 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 686 transitions, 11737 flow [2024-06-21 21:38:09,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:09,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:09,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:09,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 21:38:09,196 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)] === [2024-06-21 21:38:09,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:09,196 INFO L85 PathProgramCache]: Analyzing trace with hash 567465041, now seen corresponding path program 5 times [2024-06-21 21:38:09,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:09,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389543047] [2024-06-21 21:38:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:09,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:09,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:09,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389543047] [2024-06-21 21:38:09,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389543047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:09,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:09,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:38:09,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639610661] [2024-06-21 21:38:09,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:09,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:38:09,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:09,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:38:09,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:38:09,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:38:09,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 686 transitions, 11737 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:09,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:09,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:38:09,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:11,823 INFO L124 PetriNetUnfolderBase]: 4596/6993 cut-off events. [2024-06-21 21:38:11,823 INFO L125 PetriNetUnfolderBase]: For 900936/900948 co-relation queries the response was YES. [2024-06-21 21:38:11,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66141 conditions, 6993 events. 4596/6993 cut-off events. For 900936/900948 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 40228 event pairs, 1265 based on Foata normal form. 9/6995 useless extension candidates. Maximal degree in co-relation 65947. Up to 6754 conditions per place. [2024-06-21 21:38:11,921 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 603 selfloop transitions, 97 changer transitions 0/703 dead transitions. [2024-06-21 21:38:11,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 703 transitions, 13383 flow [2024-06-21 21:38:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:11,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 21:38:11,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-21 21:38:11,922 INFO L175 Difference]: Start difference. First operand has 433 places, 686 transitions, 11737 flow. Second operand 8 states and 124 transitions. [2024-06-21 21:38:11,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 703 transitions, 13383 flow [2024-06-21 21:38:14,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 703 transitions, 13179 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 21:38:14,545 INFO L231 Difference]: Finished difference. Result has 435 places, 686 transitions, 11735 flow [2024-06-21 21:38:14,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11535, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11735, PETRI_PLACES=435, PETRI_TRANSITIONS=686} [2024-06-21 21:38:14,545 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 394 predicate places. [2024-06-21 21:38:14,545 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 686 transitions, 11735 flow [2024-06-21 21:38:14,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:14,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:14,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:14,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 21:38:14,546 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)] === [2024-06-21 21:38:14,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:14,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1359980409, now seen corresponding path program 15 times [2024-06-21 21:38:14,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:14,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426489691] [2024-06-21 21:38:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:14,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:15,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:15,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426489691] [2024-06-21 21:38:15,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426489691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:15,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:15,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:38:15,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658025603] [2024-06-21 21:38:15,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:15,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:38:15,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:15,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:38:15,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:38:15,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:38:15,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 686 transitions, 11735 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:15,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:15,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:38:15,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:17,021 INFO L124 PetriNetUnfolderBase]: 4674/7095 cut-off events. [2024-06-21 21:38:17,022 INFO L125 PetriNetUnfolderBase]: For 948809/948818 co-relation queries the response was YES. [2024-06-21 21:38:17,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67468 conditions, 7095 events. 4674/7095 cut-off events. For 948809/948818 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 40592 event pairs, 810 based on Foata normal form. 12/7089 useless extension candidates. Maximal degree in co-relation 67273. Up to 5657 conditions per place. [2024-06-21 21:38:17,139 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 499 selfloop transitions, 228 changer transitions 0/730 dead transitions. [2024-06-21 21:38:17,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 730 transitions, 14233 flow [2024-06-21 21:38:17,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:17,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:17,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:38:17,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-21 21:38:17,140 INFO L175 Difference]: Start difference. First operand has 435 places, 686 transitions, 11735 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:38:17,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 730 transitions, 14233 flow [2024-06-21 21:38:19,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 730 transitions, 14021 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 21:38:19,998 INFO L231 Difference]: Finished difference. Result has 439 places, 703 transitions, 12399 flow [2024-06-21 21:38:19,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11523, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12399, PETRI_PLACES=439, PETRI_TRANSITIONS=703} [2024-06-21 21:38:19,999 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 398 predicate places. [2024-06-21 21:38:19,999 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 703 transitions, 12399 flow [2024-06-21 21:38:19,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:19,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:19,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:20,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 21:38:20,000 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)] === [2024-06-21 21:38:20,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:20,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1359681693, now seen corresponding path program 6 times [2024-06-21 21:38:20,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:20,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223230733] [2024-06-21 21:38:20,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:20,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:20,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:20,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223230733] [2024-06-21 21:38:20,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223230733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:20,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:20,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:38:20,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452529206] [2024-06-21 21:38:20,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:20,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:38:20,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:20,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:38:20,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:38:20,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:38:20,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 703 transitions, 12399 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:20,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:20,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:38:20,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:22,476 INFO L124 PetriNetUnfolderBase]: 4671/7096 cut-off events. [2024-06-21 21:38:22,476 INFO L125 PetriNetUnfolderBase]: For 950009/950021 co-relation queries the response was YES. [2024-06-21 21:38:22,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69052 conditions, 7096 events. 4671/7096 cut-off events. For 950009/950021 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 40868 event pairs, 1273 based on Foata normal form. 9/7099 useless extension candidates. Maximal degree in co-relation 68854. Up to 6859 conditions per place. [2024-06-21 21:38:22,588 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 626 selfloop transitions, 90 changer transitions 0/719 dead transitions. [2024-06-21 21:38:22,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 719 transitions, 13889 flow [2024-06-21 21:38:22,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:22,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:22,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 21:38:22,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-21 21:38:22,589 INFO L175 Difference]: Start difference. First operand has 439 places, 703 transitions, 12399 flow. Second operand 8 states and 123 transitions. [2024-06-21 21:38:22,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 719 transitions, 13889 flow [2024-06-21 21:38:25,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 719 transitions, 13602 flow, removed 105 selfloop flow, removed 2 redundant places. [2024-06-21 21:38:25,447 INFO L231 Difference]: Finished difference. Result has 445 places, 703 transitions, 12298 flow [2024-06-21 21:38:25,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12112, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12298, PETRI_PLACES=445, PETRI_TRANSITIONS=703} [2024-06-21 21:38:25,447 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 404 predicate places. [2024-06-21 21:38:25,447 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 703 transitions, 12298 flow [2024-06-21 21:38:25,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:25,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:25,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:25,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 21:38:25,448 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)] === [2024-06-21 21:38:25,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:25,449 INFO L85 PathProgramCache]: Analyzing trace with hash 328255835, now seen corresponding path program 16 times [2024-06-21 21:38:25,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:25,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907422] [2024-06-21 21:38:25,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:25,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:26,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:26,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907422] [2024-06-21 21:38:26,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:26,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:26,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:26,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487843858] [2024-06-21 21:38:26,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:26,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:26,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:26,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:26,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:26,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:38:26,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 703 transitions, 12298 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:38:26,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:26,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:38:26,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:27,894 INFO L124 PetriNetUnfolderBase]: 4729/7172 cut-off events. [2024-06-21 21:38:27,894 INFO L125 PetriNetUnfolderBase]: For 995651/995660 co-relation queries the response was YES. [2024-06-21 21:38:27,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69477 conditions, 7172 events. 4729/7172 cut-off events. For 995651/995660 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 41049 event pairs, 830 based on Foata normal form. 12/7166 useless extension candidates. Maximal degree in co-relation 69277. Up to 5704 conditions per place. [2024-06-21 21:38:28,016 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 502 selfloop transitions, 231 changer transitions 0/736 dead transitions. [2024-06-21 21:38:28,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 736 transitions, 14633 flow [2024-06-21 21:38:28,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:28,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 21:38:28,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 21:38:28,017 INFO L175 Difference]: Start difference. First operand has 445 places, 703 transitions, 12298 flow. Second operand 8 states and 140 transitions. [2024-06-21 21:38:28,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 736 transitions, 14633 flow [2024-06-21 21:38:31,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 736 transitions, 14425 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 21:38:31,171 INFO L231 Difference]: Finished difference. Result has 448 places, 712 transitions, 12743 flow [2024-06-21 21:38:31,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12090, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12743, PETRI_PLACES=448, PETRI_TRANSITIONS=712} [2024-06-21 21:38:31,171 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 407 predicate places. [2024-06-21 21:38:31,171 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 712 transitions, 12743 flow [2024-06-21 21:38:31,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:38:31,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:31,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:31,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 21:38:31,172 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)] === [2024-06-21 21:38:31,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:31,172 INFO L85 PathProgramCache]: Analyzing trace with hash 464212135, now seen corresponding path program 7 times [2024-06-21 21:38:31,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:31,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475283761] [2024-06-21 21:38:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:31,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:31,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:31,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475283761] [2024-06-21 21:38:31,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475283761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:31,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:31,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:38:31,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380848008] [2024-06-21 21:38:31,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:31,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:38:31,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:31,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:38:31,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:38:31,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:38:31,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 712 transitions, 12743 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:31,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:31,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:38:31,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:33,667 INFO L124 PetriNetUnfolderBase]: 4733/7183 cut-off events. [2024-06-21 21:38:33,667 INFO L125 PetriNetUnfolderBase]: For 1005505/1005517 co-relation queries the response was YES. [2024-06-21 21:38:33,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70313 conditions, 7183 events. 4733/7183 cut-off events. For 1005505/1005517 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 41360 event pairs, 1247 based on Foata normal form. 12/7189 useless extension candidates. Maximal degree in co-relation 70111. Up to 6567 conditions per place. [2024-06-21 21:38:33,792 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 570 selfloop transitions, 163 changer transitions 0/736 dead transitions. [2024-06-21 21:38:33,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 736 transitions, 14788 flow [2024-06-21 21:38:33,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:33,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 21:38:33,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 21:38:33,793 INFO L175 Difference]: Start difference. First operand has 448 places, 712 transitions, 12743 flow. Second operand 8 states and 132 transitions. [2024-06-21 21:38:33,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 736 transitions, 14788 flow [2024-06-21 21:38:36,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 736 transitions, 14321 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 21:38:36,926 INFO L231 Difference]: Finished difference. Result has 452 places, 715 transitions, 12718 flow [2024-06-21 21:38:36,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12276, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12718, PETRI_PLACES=452, PETRI_TRANSITIONS=715} [2024-06-21 21:38:36,927 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-21 21:38:36,927 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 715 transitions, 12718 flow [2024-06-21 21:38:36,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:36,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:36,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:36,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 21:38:36,927 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)] === [2024-06-21 21:38:36,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:36,928 INFO L85 PathProgramCache]: Analyzing trace with hash 818474803, now seen corresponding path program 17 times [2024-06-21 21:38:36,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:36,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291186364] [2024-06-21 21:38:36,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:36,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:37,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:37,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291186364] [2024-06-21 21:38:37,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291186364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:37,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:37,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:38:37,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95205944] [2024-06-21 21:38:37,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:37,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:38:37,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:37,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:38:37,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:38:37,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:38:37,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 715 transitions, 12718 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:37,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:37,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:38:37,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:39,734 INFO L124 PetriNetUnfolderBase]: 5003/7566 cut-off events. [2024-06-21 21:38:39,734 INFO L125 PetriNetUnfolderBase]: For 1181780/1181780 co-relation queries the response was YES. [2024-06-21 21:38:39,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75335 conditions, 7566 events. 5003/7566 cut-off events. For 1181780/1181780 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 43524 event pairs, 1607 based on Foata normal form. 18/7582 useless extension candidates. Maximal degree in co-relation 75132. Up to 7172 conditions per place. [2024-06-21 21:38:39,864 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 690 selfloop transitions, 71 changer transitions 0/764 dead transitions. [2024-06-21 21:38:39,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 764 transitions, 15260 flow [2024-06-21 21:38:39,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:38:39,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:38:39,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 21:38:39,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:38:39,865 INFO L175 Difference]: Start difference. First operand has 452 places, 715 transitions, 12718 flow. Second operand 9 states and 150 transitions. [2024-06-21 21:38:39,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 764 transitions, 15260 flow [2024-06-21 21:38:43,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 764 transitions, 14646 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-06-21 21:38:43,839 INFO L231 Difference]: Finished difference. Result has 455 places, 739 transitions, 12816 flow [2024-06-21 21:38:43,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12104, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12816, PETRI_PLACES=455, PETRI_TRANSITIONS=739} [2024-06-21 21:38:43,839 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 414 predicate places. [2024-06-21 21:38:43,839 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 739 transitions, 12816 flow [2024-06-21 21:38:43,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:43,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:43,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:43,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 21:38:43,840 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)] === [2024-06-21 21:38:43,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:43,841 INFO L85 PathProgramCache]: Analyzing trace with hash 474389125, now seen corresponding path program 8 times [2024-06-21 21:38:43,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:43,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20324808] [2024-06-21 21:38:43,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:43,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:44,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:44,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20324808] [2024-06-21 21:38:44,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20324808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:44,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:44,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:44,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000692715] [2024-06-21 21:38:44,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:44,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:44,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:44,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:44,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:44,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:38:44,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 739 transitions, 12816 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:38:44,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:44,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:38:44,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:46,779 INFO L124 PetriNetUnfolderBase]: 5007/7572 cut-off events. [2024-06-21 21:38:46,780 INFO L125 PetriNetUnfolderBase]: For 1135389/1135389 co-relation queries the response was YES. [2024-06-21 21:38:46,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75622 conditions, 7572 events. 5007/7572 cut-off events. For 1135389/1135389 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 43607 event pairs, 1610 based on Foata normal form. 4/7574 useless extension candidates. Maximal degree in co-relation 75418. Up to 7390 conditions per place. [2024-06-21 21:38:46,902 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 705 selfloop transitions, 55 changer transitions 0/763 dead transitions. [2024-06-21 21:38:46,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 763 transitions, 14902 flow [2024-06-21 21:38:46,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:38:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:38:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 21:38:46,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 21:38:46,903 INFO L175 Difference]: Start difference. First operand has 455 places, 739 transitions, 12816 flow. Second operand 9 states and 140 transitions. [2024-06-21 21:38:46,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 763 transitions, 14902 flow [2024-06-21 21:38:50,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 763 transitions, 14635 flow, removed 113 selfloop flow, removed 4 redundant places. [2024-06-21 21:38:50,505 INFO L231 Difference]: Finished difference. Result has 460 places, 742 transitions, 12750 flow [2024-06-21 21:38:50,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12549, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12750, PETRI_PLACES=460, PETRI_TRANSITIONS=742} [2024-06-21 21:38:50,505 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 419 predicate places. [2024-06-21 21:38:50,506 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 742 transitions, 12750 flow [2024-06-21 21:38:50,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:38:50,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:50,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:50,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 21:38:50,506 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)] === [2024-06-21 21:38:50,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:50,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1899021617, now seen corresponding path program 18 times [2024-06-21 21:38:50,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:50,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403120375] [2024-06-21 21:38:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:50,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:51,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:51,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403120375] [2024-06-21 21:38:51,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403120375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:51,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:51,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:38:51,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003486403] [2024-06-21 21:38:51,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:51,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:38:51,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:51,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:38:51,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:38:51,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:38:51,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 742 transitions, 12750 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:51,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:51,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:38:51,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:53,274 INFO L124 PetriNetUnfolderBase]: 5026/7586 cut-off events. [2024-06-21 21:38:53,274 INFO L125 PetriNetUnfolderBase]: For 1154850/1154858 co-relation queries the response was YES. [2024-06-21 21:38:53,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75142 conditions, 7586 events. 5026/7586 cut-off events. For 1154850/1154858 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 43523 event pairs, 967 based on Foata normal form. 14/7598 useless extension candidates. Maximal degree in co-relation 74936. Up to 7288 conditions per place. [2024-06-21 21:38:53,392 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 674 selfloop transitions, 98 changer transitions 0/775 dead transitions. [2024-06-21 21:38:53,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 775 transitions, 14508 flow [2024-06-21 21:38:53,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:38:53,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:38:53,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 21:38:53,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 21:38:53,393 INFO L175 Difference]: Start difference. First operand has 460 places, 742 transitions, 12750 flow. Second operand 7 states and 128 transitions. [2024-06-21 21:38:53,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 775 transitions, 14508 flow [2024-06-21 21:38:56,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 775 transitions, 14292 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-21 21:38:56,947 INFO L231 Difference]: Finished difference. Result has 460 places, 749 transitions, 12901 flow [2024-06-21 21:38:56,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12534, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12901, PETRI_PLACES=460, PETRI_TRANSITIONS=749} [2024-06-21 21:38:56,947 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 419 predicate places. [2024-06-21 21:38:56,947 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 749 transitions, 12901 flow [2024-06-21 21:38:56,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:56,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:56,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:56,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 21:38:56,948 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)] === [2024-06-21 21:38:56,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:56,948 INFO L85 PathProgramCache]: Analyzing trace with hash 857572271, now seen corresponding path program 19 times [2024-06-21 21:38:56,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:56,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591525510] [2024-06-21 21:38:56,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:56,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:57,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:57,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591525510] [2024-06-21 21:38:57,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591525510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:57,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:57,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:57,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382044801] [2024-06-21 21:38:57,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:57,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:57,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:57,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:57,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:57,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:38:57,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 749 transitions, 12901 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:38:57,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:57,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:38:57,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:59,924 INFO L124 PetriNetUnfolderBase]: 5076/7654 cut-off events. [2024-06-21 21:38:59,924 INFO L125 PetriNetUnfolderBase]: For 1191828/1191832 co-relation queries the response was YES. [2024-06-21 21:39:00,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77423 conditions, 7654 events. 5076/7654 cut-off events. For 1191828/1191832 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 43798 event pairs, 866 based on Foata normal form. 10/7662 useless extension candidates. Maximal degree in co-relation 77216. Up to 7202 conditions per place. [2024-06-21 21:39:00,047 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 653 selfloop transitions, 127 changer transitions 0/783 dead transitions. [2024-06-21 21:39:00,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 783 transitions, 14987 flow [2024-06-21 21:39:00,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:39:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:39:00,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 21:39:00,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 21:39:00,049 INFO L175 Difference]: Start difference. First operand has 460 places, 749 transitions, 12901 flow. Second operand 7 states and 128 transitions. [2024-06-21 21:39:00,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 783 transitions, 14987 flow [2024-06-21 21:39:03,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 783 transitions, 14793 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-21 21:39:03,520 INFO L231 Difference]: Finished difference. Result has 464 places, 756 transitions, 13256 flow [2024-06-21 21:39:03,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12713, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13256, PETRI_PLACES=464, PETRI_TRANSITIONS=756} [2024-06-21 21:39:03,521 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 423 predicate places. [2024-06-21 21:39:03,521 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 756 transitions, 13256 flow [2024-06-21 21:39:03,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:39:03,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:03,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:03,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 21:39:03,521 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)] === [2024-06-21 21:39:03,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:03,522 INFO L85 PathProgramCache]: Analyzing trace with hash 2265989, now seen corresponding path program 9 times [2024-06-21 21:39:03,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:03,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418386944] [2024-06-21 21:39:03,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:03,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:04,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:04,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418386944] [2024-06-21 21:39:04,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418386944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:04,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:04,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:04,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957336139] [2024-06-21 21:39:04,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:04,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:04,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:04,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:04,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:04,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:39:04,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 756 transitions, 13256 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:04,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:04,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:39:04,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:06,170 INFO L124 PetriNetUnfolderBase]: 5086/7671 cut-off events. [2024-06-21 21:39:06,171 INFO L125 PetriNetUnfolderBase]: For 1200225/1200229 co-relation queries the response was YES. [2024-06-21 21:39:06,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78096 conditions, 7671 events. 5086/7671 cut-off events. For 1200225/1200229 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 44083 event pairs, 1323 based on Foata normal form. 6/7675 useless extension candidates. Maximal degree in co-relation 77888. Up to 7548 conditions per place. [2024-06-21 21:39:06,309 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 731 selfloop transitions, 45 changer transitions 0/779 dead transitions. [2024-06-21 21:39:06,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 779 transitions, 15162 flow [2024-06-21 21:39:06,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:39:06,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:39:06,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 21:39:06,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 21:39:06,311 INFO L175 Difference]: Start difference. First operand has 464 places, 756 transitions, 13256 flow. Second operand 7 states and 116 transitions. [2024-06-21 21:39:06,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 779 transitions, 15162 flow [2024-06-21 21:39:11,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 779 transitions, 14932 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:11,010 INFO L231 Difference]: Finished difference. Result has 465 places, 759 transitions, 13192 flow [2024-06-21 21:39:11,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13028, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13192, PETRI_PLACES=465, PETRI_TRANSITIONS=759} [2024-06-21 21:39:11,010 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 424 predicate places. [2024-06-21 21:39:11,010 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 759 transitions, 13192 flow [2024-06-21 21:39:11,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:11,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:11,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:11,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 21:39:11,011 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)] === [2024-06-21 21:39:11,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:11,011 INFO L85 PathProgramCache]: Analyzing trace with hash 6919709, now seen corresponding path program 10 times [2024-06-21 21:39:11,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:11,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889849269] [2024-06-21 21:39:11,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:11,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:11,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:11,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889849269] [2024-06-21 21:39:11,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889849269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:11,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:11,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:11,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444736274] [2024-06-21 21:39:11,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:11,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:11,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:11,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:11,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:11,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:39:11,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 759 transitions, 13192 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:39:11,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:11,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:39:11,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:13,871 INFO L124 PetriNetUnfolderBase]: 5070/7661 cut-off events. [2024-06-21 21:39:13,871 INFO L125 PetriNetUnfolderBase]: For 1190544/1190544 co-relation queries the response was YES. [2024-06-21 21:39:13,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77211 conditions, 7661 events. 5070/7661 cut-off events. For 1190544/1190544 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 44133 event pairs, 1616 based on Foata normal form. 4/7663 useless extension candidates. Maximal degree in co-relation 77003. Up to 7505 conditions per place. [2024-06-21 21:39:14,013 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 730 selfloop transitions, 43 changer transitions 0/776 dead transitions. [2024-06-21 21:39:14,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 776 transitions, 14822 flow [2024-06-21 21:39:14,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:14,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:14,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-21 21:39:14,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-21 21:39:14,014 INFO L175 Difference]: Start difference. First operand has 465 places, 759 transitions, 13192 flow. Second operand 8 states and 122 transitions. [2024-06-21 21:39:14,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 776 transitions, 14822 flow [2024-06-21 21:39:18,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 776 transitions, 14607 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-21 21:39:18,517 INFO L231 Difference]: Finished difference. Result has 468 places, 759 transitions, 13077 flow [2024-06-21 21:39:18,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12977, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13077, PETRI_PLACES=468, PETRI_TRANSITIONS=759} [2024-06-21 21:39:18,517 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 427 predicate places. [2024-06-21 21:39:18,517 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 759 transitions, 13077 flow [2024-06-21 21:39:18,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:39:18,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:18,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:18,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 21:39:18,517 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)] === [2024-06-21 21:39:18,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:18,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1892587505, now seen corresponding path program 11 times [2024-06-21 21:39:18,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:18,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490113005] [2024-06-21 21:39:18,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:18,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:19,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:19,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490113005] [2024-06-21 21:39:19,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490113005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:19,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:19,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:19,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144809104] [2024-06-21 21:39:19,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:19,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:19,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:19,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:19,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:19,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:39:19,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 759 transitions, 13077 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:39:19,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:19,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:39:19,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:21,331 INFO L124 PetriNetUnfolderBase]: 5074/7667 cut-off events. [2024-06-21 21:39:21,331 INFO L125 PetriNetUnfolderBase]: For 1202897/1202897 co-relation queries the response was YES. [2024-06-21 21:39:21,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77164 conditions, 7667 events. 5074/7667 cut-off events. For 1202897/1202897 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 44200 event pairs, 1663 based on Foata normal form. 4/7669 useless extension candidates. Maximal degree in co-relation 76955. Up to 7422 conditions per place. [2024-06-21 21:39:21,464 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 706 selfloop transitions, 69 changer transitions 0/778 dead transitions. [2024-06-21 21:39:21,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 778 transitions, 15197 flow [2024-06-21 21:39:21,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:39:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:39:21,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 141 transitions. [2024-06-21 21:39:21,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3525 [2024-06-21 21:39:21,466 INFO L175 Difference]: Start difference. First operand has 468 places, 759 transitions, 13077 flow. Second operand 10 states and 141 transitions. [2024-06-21 21:39:21,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 778 transitions, 15197 flow [2024-06-21 21:39:25,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 778 transitions, 15111 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:39:25,430 INFO L231 Difference]: Finished difference. Result has 471 places, 762 transitions, 13232 flow [2024-06-21 21:39:25,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12991, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13232, PETRI_PLACES=471, PETRI_TRANSITIONS=762} [2024-06-21 21:39:25,431 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 430 predicate places. [2024-06-21 21:39:25,431 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 762 transitions, 13232 flow [2024-06-21 21:39:25,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:39:25,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:25,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:25,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 21:39:25,432 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)] === [2024-06-21 21:39:25,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:25,432 INFO L85 PathProgramCache]: Analyzing trace with hash 848158009, now seen corresponding path program 20 times [2024-06-21 21:39:25,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:25,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098996928] [2024-06-21 21:39:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:25,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:26,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:26,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098996928] [2024-06-21 21:39:26,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098996928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:26,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:26,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:26,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234499738] [2024-06-21 21:39:26,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:26,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:26,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:26,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:26,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:26,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:39:26,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 762 transitions, 13232 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:39:26,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:26,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:39:26,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:28,508 INFO L124 PetriNetUnfolderBase]: 5376/8073 cut-off events. [2024-06-21 21:39:28,508 INFO L125 PetriNetUnfolderBase]: For 1417948/1417952 co-relation queries the response was YES. [2024-06-21 21:39:28,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84264 conditions, 8073 events. 5376/8073 cut-off events. For 1417948/1417952 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 46102 event pairs, 859 based on Foata normal form. 22/8093 useless extension candidates. Maximal degree in co-relation 84054. Up to 6760 conditions per place. [2024-06-21 21:39:28,652 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 618 selfloop transitions, 203 changer transitions 0/824 dead transitions. [2024-06-21 21:39:28,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 824 transitions, 16170 flow [2024-06-21 21:39:28,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 21:39:28,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-06-21 21:39:28,653 INFO L175 Difference]: Start difference. First operand has 471 places, 762 transitions, 13232 flow. Second operand 8 states and 155 transitions. [2024-06-21 21:39:28,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 824 transitions, 16170 flow [2024-06-21 21:39:33,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 824 transitions, 15994 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:33,966 INFO L231 Difference]: Finished difference. Result has 475 places, 787 transitions, 14280 flow [2024-06-21 21:39:33,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13056, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14280, PETRI_PLACES=475, PETRI_TRANSITIONS=787} [2024-06-21 21:39:33,967 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-21 21:39:33,967 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 787 transitions, 14280 flow [2024-06-21 21:39:33,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:39:33,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:33,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:33,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 21:39:33,968 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)] === [2024-06-21 21:39:33,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:33,968 INFO L85 PathProgramCache]: Analyzing trace with hash 2503139, now seen corresponding path program 12 times [2024-06-21 21:39:33,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:33,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317893407] [2024-06-21 21:39:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:33,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:34,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:34,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317893407] [2024-06-21 21:39:34,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317893407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:34,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:34,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:34,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208070201] [2024-06-21 21:39:34,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:34,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:34,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:34,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:34,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:34,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:39:34,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 787 transitions, 14280 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:39:34,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:34,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:39:34,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:37,082 INFO L124 PetriNetUnfolderBase]: 5370/8067 cut-off events. [2024-06-21 21:39:37,082 INFO L125 PetriNetUnfolderBase]: For 1353154/1353158 co-relation queries the response was YES. [2024-06-21 21:39:37,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86354 conditions, 8067 events. 5370/8067 cut-off events. For 1353154/1353158 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 46340 event pairs, 1360 based on Foata normal form. 6/8071 useless extension candidates. Maximal degree in co-relation 86141. Up to 7983 conditions per place. [2024-06-21 21:39:37,228 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 768 selfloop transitions, 31 changer transitions 0/802 dead transitions. [2024-06-21 21:39:37,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 802 transitions, 15936 flow [2024-06-21 21:39:37,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:39:37,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:39:37,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 21:39:37,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2024-06-21 21:39:37,229 INFO L175 Difference]: Start difference. First operand has 475 places, 787 transitions, 14280 flow. Second operand 7 states and 109 transitions. [2024-06-21 21:39:37,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 802 transitions, 15936 flow [2024-06-21 21:39:41,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 802 transitions, 15593 flow, removed 137 selfloop flow, removed 3 redundant places. [2024-06-21 21:39:41,804 INFO L231 Difference]: Finished difference. Result has 479 places, 787 transitions, 14005 flow [2024-06-21 21:39:41,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13937, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=756, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14005, PETRI_PLACES=479, PETRI_TRANSITIONS=787} [2024-06-21 21:39:41,805 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 438 predicate places. [2024-06-21 21:39:41,805 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 787 transitions, 14005 flow [2024-06-21 21:39:41,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-21 21:39:41,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:41,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:41,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 21:39:41,806 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)] === [2024-06-21 21:39:41,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:41,806 INFO L85 PathProgramCache]: Analyzing trace with hash 857449325, now seen corresponding path program 7 times [2024-06-21 21:39:41,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:41,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167590760] [2024-06-21 21:39:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:41,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:42,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:42,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167590760] [2024-06-21 21:39:42,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167590760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:42,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:42,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:39:42,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547286472] [2024-06-21 21:39:42,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:42,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:39:42,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:42,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:39:42,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:39:42,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:39:42,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 787 transitions, 14005 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:42,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:42,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:39:42,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:45,346 INFO L124 PetriNetUnfolderBase]: 5409/8135 cut-off events. [2024-06-21 21:39:45,346 INFO L125 PetriNetUnfolderBase]: For 1439008/1439014 co-relation queries the response was YES. [2024-06-21 21:39:45,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85412 conditions, 8135 events. 5409/8135 cut-off events. For 1439008/1439014 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 46609 event pairs, 1150 based on Foata normal form. 20/8153 useless extension candidates. Maximal degree in co-relation 85197. Up to 7727 conditions per place. [2024-06-21 21:39:45,512 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 722 selfloop transitions, 93 changer transitions 0/818 dead transitions. [2024-06-21 21:39:45,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 818 transitions, 15835 flow [2024-06-21 21:39:45,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:39:45,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:39:45,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 21:39:45,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-21 21:39:45,514 INFO L175 Difference]: Start difference. First operand has 479 places, 787 transitions, 14005 flow. Second operand 7 states and 129 transitions. [2024-06-21 21:39:45,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 818 transitions, 15835 flow [2024-06-21 21:39:50,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 818 transitions, 15726 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:50,589 INFO L231 Difference]: Finished difference. Result has 480 places, 788 transitions, 14146 flow [2024-06-21 21:39:50,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13896, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14146, PETRI_PLACES=480, PETRI_TRANSITIONS=788} [2024-06-21 21:39:50,589 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-21 21:39:50,590 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 788 transitions, 14146 flow [2024-06-21 21:39:50,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:50,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:50,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:50,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 21:39:50,590 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)] === [2024-06-21 21:39:50,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:50,590 INFO L85 PathProgramCache]: Analyzing trace with hash 416294177, now seen corresponding path program 3 times [2024-06-21 21:39:50,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:50,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148669887] [2024-06-21 21:39:50,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:50,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:51,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:51,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148669887] [2024-06-21 21:39:51,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148669887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:51,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:51,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:51,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206213124] [2024-06-21 21:39:51,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:51,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:51,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:51,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:51,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:51,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:39:51,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 788 transitions, 14146 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:51,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:51,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:39:51,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:54,036 INFO L124 PetriNetUnfolderBase]: 5430/8171 cut-off events. [2024-06-21 21:39:54,036 INFO L125 PetriNetUnfolderBase]: For 1413366/1413366 co-relation queries the response was YES. [2024-06-21 21:39:54,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86640 conditions, 8171 events. 5430/8171 cut-off events. For 1413366/1413366 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 47103 event pairs, 1721 based on Foata normal form. 2/8171 useless extension candidates. Maximal degree in co-relation 86424. Up to 8078 conditions per place. [2024-06-21 21:39:54,189 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 777 selfloop transitions, 26 changer transitions 0/806 dead transitions. [2024-06-21 21:39:54,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 806 transitions, 16138 flow [2024-06-21 21:39:54,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:39:54,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:39:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-21 21:39:54,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33 [2024-06-21 21:39:54,190 INFO L175 Difference]: Start difference. First operand has 480 places, 788 transitions, 14146 flow. Second operand 10 states and 132 transitions. [2024-06-21 21:39:54,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 806 transitions, 16138 flow [2024-06-21 21:39:59,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 806 transitions, 16010 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 21:39:59,102 INFO L231 Difference]: Finished difference. Result has 486 places, 792 transitions, 14217 flow [2024-06-21 21:39:59,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14024, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=764, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14217, PETRI_PLACES=486, PETRI_TRANSITIONS=792} [2024-06-21 21:39:59,103 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 445 predicate places. [2024-06-21 21:39:59,103 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 792 transitions, 14217 flow [2024-06-21 21:39:59,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:59,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:59,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:59,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 21:39:59,103 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)] === [2024-06-21 21:39:59,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:59,103 INFO L85 PathProgramCache]: Analyzing trace with hash -933711387, now seen corresponding path program 4 times [2024-06-21 21:39:59,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:59,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716891070] [2024-06-21 21:39:59,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:59,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:00,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:00,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716891070] [2024-06-21 21:40:00,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716891070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:00,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:00,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:40:00,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424596165] [2024-06-21 21:40:00,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:00,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:40:00,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:00,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:40:00,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:40:00,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:40:00,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 792 transitions, 14217 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:00,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:00,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:40:00,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:02,484 INFO L124 PetriNetUnfolderBase]: 5425/8164 cut-off events. [2024-06-21 21:40:02,484 INFO L125 PetriNetUnfolderBase]: For 1402697/1402697 co-relation queries the response was YES. [2024-06-21 21:40:02,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86107 conditions, 8164 events. 5425/8164 cut-off events. For 1402697/1402697 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 47120 event pairs, 1734 based on Foata normal form. 2/8164 useless extension candidates. Maximal degree in co-relation 85890. Up to 8079 conditions per place. [2024-06-21 21:40:02,636 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 773 selfloop transitions, 29 changer transitions 0/805 dead transitions. [2024-06-21 21:40:02,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 805 transitions, 15923 flow [2024-06-21 21:40:02,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:40:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:40:02,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-06-21 21:40:02,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3388888888888889 [2024-06-21 21:40:02,637 INFO L175 Difference]: Start difference. First operand has 486 places, 792 transitions, 14217 flow. Second operand 9 states and 122 transitions. [2024-06-21 21:40:02,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 805 transitions, 15923 flow [2024-06-21 21:40:08,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 805 transitions, 15701 flow, removed 57 selfloop flow, removed 11 redundant places. [2024-06-21 21:40:08,673 INFO L231 Difference]: Finished difference. Result has 484 places, 794 transitions, 14132 flow [2024-06-21 21:40:08,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13995, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=763, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14132, PETRI_PLACES=484, PETRI_TRANSITIONS=794} [2024-06-21 21:40:08,673 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 443 predicate places. [2024-06-21 21:40:08,673 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 794 transitions, 14132 flow [2024-06-21 21:40:08,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:08,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:08,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:08,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 21:40:08,674 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)] === [2024-06-21 21:40:08,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:08,674 INFO L85 PathProgramCache]: Analyzing trace with hash -534214077, now seen corresponding path program 5 times [2024-06-21 21:40:08,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:08,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055674364] [2024-06-21 21:40:08,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:08,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:09,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:09,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055674364] [2024-06-21 21:40:09,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055674364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:09,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:09,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:40:09,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882381503] [2024-06-21 21:40:09,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:09,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:40:09,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:09,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:40:09,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:40:09,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:40:09,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 794 transitions, 14132 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:09,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:09,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:40:09,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:12,074 INFO L124 PetriNetUnfolderBase]: 5420/8145 cut-off events. [2024-06-21 21:40:12,074 INFO L125 PetriNetUnfolderBase]: For 1411073/1411077 co-relation queries the response was YES. [2024-06-21 21:40:12,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85915 conditions, 8145 events. 5420/8145 cut-off events. For 1411073/1411077 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 46832 event pairs, 1386 based on Foata normal form. 6/8149 useless extension candidates. Maximal degree in co-relation 85701. Up to 8056 conditions per place. [2024-06-21 21:40:12,228 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 774 selfloop transitions, 31 changer transitions 0/808 dead transitions. [2024-06-21 21:40:12,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 808 transitions, 15790 flow [2024-06-21 21:40:12,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:40:12,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:40:12,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 21:40:12,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 21:40:12,230 INFO L175 Difference]: Start difference. First operand has 484 places, 794 transitions, 14132 flow. Second operand 6 states and 99 transitions. [2024-06-21 21:40:12,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 808 transitions, 15790 flow [2024-06-21 21:40:17,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 808 transitions, 15602 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-21 21:40:17,352 INFO L231 Difference]: Finished difference. Result has 482 places, 794 transitions, 14011 flow [2024-06-21 21:40:17,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13944, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=763, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14011, PETRI_PLACES=482, PETRI_TRANSITIONS=794} [2024-06-21 21:40:17,353 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 441 predicate places. [2024-06-21 21:40:17,353 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 794 transitions, 14011 flow [2024-06-21 21:40:17,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:17,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:17,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:17,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 21:40:17,354 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)] === [2024-06-21 21:40:17,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:17,354 INFO L85 PathProgramCache]: Analyzing trace with hash 700572937, now seen corresponding path program 1 times [2024-06-21 21:40:17,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:17,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138960766] [2024-06-21 21:40:17,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:17,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:18,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:18,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138960766] [2024-06-21 21:40:18,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138960766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:18,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:18,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:40:18,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115349811] [2024-06-21 21:40:18,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:18,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:40:18,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:18,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:40:18,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:40:18,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:40:18,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 794 transitions, 14011 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:18,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:18,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:40:18,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:20,648 INFO L124 PetriNetUnfolderBase]: 5449/8192 cut-off events. [2024-06-21 21:40:20,648 INFO L125 PetriNetUnfolderBase]: For 1461733/1461745 co-relation queries the response was YES. [2024-06-21 21:40:20,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86324 conditions, 8192 events. 5449/8192 cut-off events. For 1461733/1461745 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 47274 event pairs, 1321 based on Foata normal form. 12/8198 useless extension candidates. Maximal degree in co-relation 86110. Up to 7822 conditions per place. [2024-06-21 21:40:20,802 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 701 selfloop transitions, 123 changer transitions 0/827 dead transitions. [2024-06-21 21:40:20,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 827 transitions, 16359 flow [2024-06-21 21:40:20,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:40:20,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:40:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 21:40:20,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-06-21 21:40:20,803 INFO L175 Difference]: Start difference. First operand has 482 places, 794 transitions, 14011 flow. Second operand 9 states and 146 transitions. [2024-06-21 21:40:20,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 827 transitions, 16359 flow [2024-06-21 21:40:27,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 827 transitions, 16292 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 21:40:27,266 INFO L231 Difference]: Finished difference. Result has 486 places, 800 transitions, 14374 flow [2024-06-21 21:40:27,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13944, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14374, PETRI_PLACES=486, PETRI_TRANSITIONS=800} [2024-06-21 21:40:27,267 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 445 predicate places. [2024-06-21 21:40:27,267 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 800 transitions, 14374 flow [2024-06-21 21:40:27,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:27,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:27,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:27,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 21:40:27,268 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)] === [2024-06-21 21:40:27,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:27,269 INFO L85 PathProgramCache]: Analyzing trace with hash 894459375, now seen corresponding path program 1 times [2024-06-21 21:40:27,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:27,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319169888] [2024-06-21 21:40:27,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:27,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:28,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:28,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319169888] [2024-06-21 21:40:28,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319169888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:28,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:28,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:40:28,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35001295] [2024-06-21 21:40:28,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:28,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:40:28,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:28,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:40:28,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:40:28,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:40:28,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 800 transitions, 14374 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:28,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:28,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:40:28,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:31,523 INFO L124 PetriNetUnfolderBase]: 5485/8242 cut-off events. [2024-06-21 21:40:31,523 INFO L125 PetriNetUnfolderBase]: For 1492652/1492664 co-relation queries the response was YES. [2024-06-21 21:40:31,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87866 conditions, 8242 events. 5485/8242 cut-off events. For 1492652/1492664 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 47549 event pairs, 1304 based on Foata normal form. 12/8248 useless extension candidates. Maximal degree in co-relation 87651. Up to 7463 conditions per place. [2024-06-21 21:40:31,678 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 616 selfloop transitions, 219 changer transitions 0/838 dead transitions. [2024-06-21 21:40:31,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 838 transitions, 17076 flow [2024-06-21 21:40:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:40:31,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:40:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-21 21:40:31,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:40:31,680 INFO L175 Difference]: Start difference. First operand has 486 places, 800 transitions, 14374 flow. Second operand 11 states and 176 transitions. [2024-06-21 21:40:31,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 838 transitions, 17076 flow [2024-06-21 21:40:37,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 838 transitions, 16803 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-21 21:40:37,315 INFO L231 Difference]: Finished difference. Result has 492 places, 808 transitions, 14799 flow [2024-06-21 21:40:37,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14101, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14799, PETRI_PLACES=492, PETRI_TRANSITIONS=808} [2024-06-21 21:40:37,316 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 451 predicate places. [2024-06-21 21:40:37,316 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 808 transitions, 14799 flow [2024-06-21 21:40:37,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:37,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:37,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:37,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 21:40:37,317 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)] === [2024-06-21 21:40:37,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:37,317 INFO L85 PathProgramCache]: Analyzing trace with hash 700633387, now seen corresponding path program 2 times [2024-06-21 21:40:37,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:37,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227973162] [2024-06-21 21:40:37,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:37,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:37,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:38,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:38,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:38,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227973162] [2024-06-21 21:40:38,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227973162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:38,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:38,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:40:38,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766258090] [2024-06-21 21:40:38,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:38,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:40:38,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:38,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:40:38,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:40:38,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:40:38,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 808 transitions, 14799 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:38,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:38,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:40:38,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:41,423 INFO L124 PetriNetUnfolderBase]: 5501/8266 cut-off events. [2024-06-21 21:40:41,423 INFO L125 PetriNetUnfolderBase]: For 1524308/1524320 co-relation queries the response was YES. [2024-06-21 21:40:41,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89020 conditions, 8266 events. 5501/8266 cut-off events. For 1524308/1524320 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 47813 event pairs, 1363 based on Foata normal form. 12/8272 useless extension candidates. Maximal degree in co-relation 88803. Up to 7965 conditions per place. [2024-06-21 21:40:41,565 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 712 selfloop transitions, 119 changer transitions 0/834 dead transitions. [2024-06-21 21:40:41,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 834 transitions, 16811 flow [2024-06-21 21:40:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:40:41,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:40:41,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-21 21:40:41,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3825 [2024-06-21 21:40:41,566 INFO L175 Difference]: Start difference. First operand has 492 places, 808 transitions, 14799 flow. Second operand 10 states and 153 transitions. [2024-06-21 21:40:41,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 834 transitions, 16811 flow [2024-06-21 21:40:46,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 834 transitions, 16415 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-21 21:40:46,953 INFO L231 Difference]: Finished difference. Result has 495 places, 811 transitions, 14703 flow [2024-06-21 21:40:46,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14403, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14703, PETRI_PLACES=495, PETRI_TRANSITIONS=811} [2024-06-21 21:40:46,953 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 454 predicate places. [2024-06-21 21:40:46,953 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 811 transitions, 14703 flow [2024-06-21 21:40:46,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:46,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:46,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:46,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 21:40:46,954 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)] === [2024-06-21 21:40:46,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:46,954 INFO L85 PathProgramCache]: Analyzing trace with hash 818725841, now seen corresponding path program 2 times [2024-06-21 21:40:46,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:46,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882903069] [2024-06-21 21:40:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:46,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:47,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:47,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882903069] [2024-06-21 21:40:47,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882903069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:47,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:47,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:40:47,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287000762] [2024-06-21 21:40:47,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:47,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:40:47,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:47,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:40:47,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:40:47,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:40:47,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 811 transitions, 14703 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:47,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:47,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:40:47,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:51,049 INFO L124 PetriNetUnfolderBase]: 5677/8518 cut-off events. [2024-06-21 21:40:51,049 INFO L125 PetriNetUnfolderBase]: For 1675153/1675153 co-relation queries the response was YES. [2024-06-21 21:40:51,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93642 conditions, 8518 events. 5677/8518 cut-off events. For 1675153/1675153 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 49271 event pairs, 1689 based on Foata normal form. 8/8524 useless extension candidates. Maximal degree in co-relation 93423. Up to 8067 conditions per place. [2024-06-21 21:40:51,408 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 781 selfloop transitions, 80 changer transitions 0/864 dead transitions. [2024-06-21 21:40:51,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 864 transitions, 17829 flow [2024-06-21 21:40:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:40:51,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:40:51,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-21 21:40:51,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075 [2024-06-21 21:40:51,410 INFO L175 Difference]: Start difference. First operand has 495 places, 811 transitions, 14703 flow. Second operand 10 states and 163 transitions. [2024-06-21 21:40:51,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 864 transitions, 17829 flow [2024-06-21 21:40:56,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 864 transitions, 17598 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 21:40:56,650 INFO L231 Difference]: Finished difference. Result has 500 places, 835 transitions, 15307 flow [2024-06-21 21:40:56,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14472, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=739, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15307, PETRI_PLACES=500, PETRI_TRANSITIONS=835} [2024-06-21 21:40:56,651 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 459 predicate places. [2024-06-21 21:40:56,651 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 835 transitions, 15307 flow [2024-06-21 21:40:56,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:56,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:56,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:56,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 21:40:56,652 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)] === [2024-06-21 21:40:56,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:56,652 INFO L85 PathProgramCache]: Analyzing trace with hash 682949837, now seen corresponding path program 1 times [2024-06-21 21:40:56,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:56,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9644145] [2024-06-21 21:40:56,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:56,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:57,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:57,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9644145] [2024-06-21 21:40:57,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9644145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:57,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:57,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:40:57,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554031648] [2024-06-21 21:40:57,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:57,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:40:57,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:57,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:40:57,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:40:57,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:40:57,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 835 transitions, 15307 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:57,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:57,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:40:57,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:00,556 INFO L124 PetriNetUnfolderBase]: 5685/8530 cut-off events. [2024-06-21 21:41:00,556 INFO L125 PetriNetUnfolderBase]: For 1688349/1688349 co-relation queries the response was YES. [2024-06-21 21:41:00,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94997 conditions, 8530 events. 5685/8530 cut-off events. For 1688349/1688349 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 49357 event pairs, 1703 based on Foata normal form. 2/8530 useless extension candidates. Maximal degree in co-relation 94775. Up to 8432 conditions per place. [2024-06-21 21:41:00,722 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 821 selfloop transitions, 29 changer transitions 0/853 dead transitions. [2024-06-21 21:41:00,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 853 transitions, 17139 flow [2024-06-21 21:41:00,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:41:00,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:41:00,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-21 21:41:00,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36875 [2024-06-21 21:41:00,723 INFO L175 Difference]: Start difference. First operand has 500 places, 835 transitions, 15307 flow. Second operand 8 states and 118 transitions. [2024-06-21 21:41:00,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 853 transitions, 17139 flow [2024-06-21 21:41:06,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 853 transitions, 16884 flow, removed 109 selfloop flow, removed 4 redundant places. [2024-06-21 21:41:06,417 INFO L231 Difference]: Finished difference. Result has 504 places, 837 transitions, 15185 flow [2024-06-21 21:41:06,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15052, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=835, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=806, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15185, PETRI_PLACES=504, PETRI_TRANSITIONS=837} [2024-06-21 21:41:06,418 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 463 predicate places. [2024-06-21 21:41:06,418 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 837 transitions, 15185 flow [2024-06-21 21:41:06,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:06,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:06,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:06,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 21:41:06,419 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)] === [2024-06-21 21:41:06,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:06,419 INFO L85 PathProgramCache]: Analyzing trace with hash 818721067, now seen corresponding path program 3 times [2024-06-21 21:41:06,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:06,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103016480] [2024-06-21 21:41:06,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:06,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:07,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:07,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103016480] [2024-06-21 21:41:07,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103016480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:07,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:07,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:41:07,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775891152] [2024-06-21 21:41:07,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:07,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:41:07,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:07,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:41:07,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:41:07,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:41:07,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 837 transitions, 15185 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:07,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:07,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:41:07,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:10,661 INFO L124 PetriNetUnfolderBase]: 5789/8690 cut-off events. [2024-06-21 21:41:10,662 INFO L125 PetriNetUnfolderBase]: For 1878052/1878052 co-relation queries the response was YES. [2024-06-21 21:41:10,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96434 conditions, 8690 events. 5789/8690 cut-off events. For 1878052/1878052 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 50450 event pairs, 1731 based on Foata normal form. 28/8716 useless extension candidates. Maximal degree in co-relation 96210. Up to 8416 conditions per place. [2024-06-21 21:41:10,813 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 810 selfloop transitions, 55 changer transitions 0/868 dead transitions. [2024-06-21 21:41:10,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 868 transitions, 17267 flow [2024-06-21 21:41:10,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:41:10,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:41:10,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-21 21:41:10,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-06-21 21:41:10,814 INFO L175 Difference]: Start difference. First operand has 504 places, 837 transitions, 15185 flow. Second operand 10 states and 156 transitions. [2024-06-21 21:41:10,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 868 transitions, 17267 flow [2024-06-21 21:41:16,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 868 transitions, 17109 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 21:41:16,121 INFO L231 Difference]: Finished difference. Result has 508 places, 842 transitions, 15296 flow [2024-06-21 21:41:16,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15027, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=782, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15296, PETRI_PLACES=508, PETRI_TRANSITIONS=842} [2024-06-21 21:41:16,122 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 467 predicate places. [2024-06-21 21:41:16,122 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 842 transitions, 15296 flow [2024-06-21 21:41:16,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:16,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:16,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:16,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 21:41:16,123 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)] === [2024-06-21 21:41:16,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:16,124 INFO L85 PathProgramCache]: Analyzing trace with hash 818721191, now seen corresponding path program 3 times [2024-06-21 21:41:16,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:16,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246251856] [2024-06-21 21:41:16,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:16,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:17,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:17,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246251856] [2024-06-21 21:41:17,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246251856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:17,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:17,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:41:17,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660119719] [2024-06-21 21:41:17,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:17,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:41:17,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:17,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:41:17,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:41:17,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:41:17,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 842 transitions, 15296 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:17,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:17,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:41:17,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:20,553 INFO L124 PetriNetUnfolderBase]: 5825/8740 cut-off events. [2024-06-21 21:41:20,553 INFO L125 PetriNetUnfolderBase]: For 1769440/1769440 co-relation queries the response was YES. [2024-06-21 21:41:20,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97563 conditions, 8740 events. 5825/8740 cut-off events. For 1769440/1769440 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 50736 event pairs, 1714 based on Foata normal form. 4/8742 useless extension candidates. Maximal degree in co-relation 97339. Up to 8495 conditions per place. [2024-06-21 21:41:20,707 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 798 selfloop transitions, 74 changer transitions 0/875 dead transitions. [2024-06-21 21:41:20,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 875 transitions, 18034 flow [2024-06-21 21:41:20,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:41:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:41:20,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 168 transitions. [2024-06-21 21:41:20,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-06-21 21:41:20,708 INFO L175 Difference]: Start difference. First operand has 508 places, 842 transitions, 15296 flow. Second operand 11 states and 168 transitions. [2024-06-21 21:41:20,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 875 transitions, 18034 flow [2024-06-21 21:41:26,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 875 transitions, 17897 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 21:41:26,207 INFO L231 Difference]: Finished difference. Result has 513 places, 849 transitions, 15511 flow [2024-06-21 21:41:26,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15159, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=771, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15511, PETRI_PLACES=513, PETRI_TRANSITIONS=849} [2024-06-21 21:41:26,208 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 472 predicate places. [2024-06-21 21:41:26,208 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 849 transitions, 15511 flow [2024-06-21 21:41:26,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:26,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:26,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:26,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 21:41:26,209 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)] === [2024-06-21 21:41:26,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:26,209 INFO L85 PathProgramCache]: Analyzing trace with hash 407729249, now seen corresponding path program 2 times [2024-06-21 21:41:26,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:26,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366006184] [2024-06-21 21:41:26,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:26,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:27,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:27,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366006184] [2024-06-21 21:41:27,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366006184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:27,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:27,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:41:27,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750808001] [2024-06-21 21:41:27,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:27,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:41:27,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:27,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:41:27,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:41:27,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:41:27,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 849 transitions, 15511 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:27,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:27,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:41:27,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:30,162 INFO L124 PetriNetUnfolderBase]: 5833/8752 cut-off events. [2024-06-21 21:41:30,162 INFO L125 PetriNetUnfolderBase]: For 1772099/1772099 co-relation queries the response was YES. [2024-06-21 21:41:30,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97661 conditions, 8752 events. 5833/8752 cut-off events. For 1772099/1772099 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 50849 event pairs, 1745 based on Foata normal form. 2/8752 useless extension candidates. Maximal degree in co-relation 97436. Up to 8646 conditions per place. [2024-06-21 21:41:30,319 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 832 selfloop transitions, 29 changer transitions 0/864 dead transitions. [2024-06-21 21:41:30,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 864 transitions, 17357 flow [2024-06-21 21:41:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:41:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:41:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-21 21:41:30,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 21:41:30,320 INFO L175 Difference]: Start difference. First operand has 513 places, 849 transitions, 15511 flow. Second operand 6 states and 95 transitions. [2024-06-21 21:41:30,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 864 transitions, 17357 flow [2024-06-21 21:41:36,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 864 transitions, 17210 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 21:41:36,317 INFO L231 Difference]: Finished difference. Result has 513 places, 851 transitions, 15507 flow [2024-06-21 21:41:36,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15364, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=820, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=15507, PETRI_PLACES=513, PETRI_TRANSITIONS=851} [2024-06-21 21:41:36,317 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 472 predicate places. [2024-06-21 21:41:36,317 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 851 transitions, 15507 flow [2024-06-21 21:41:36,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:36,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:36,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:36,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 21:41:36,318 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)] === [2024-06-21 21:41:36,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:36,318 INFO L85 PathProgramCache]: Analyzing trace with hash 416300129, now seen corresponding path program 3 times [2024-06-21 21:41:36,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:36,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460490294] [2024-06-21 21:41:36,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:36,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:37,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:37,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460490294] [2024-06-21 21:41:37,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460490294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:37,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:37,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:41:37,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686679283] [2024-06-21 21:41:37,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:37,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:41:37,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:37,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:41:37,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:41:37,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:41:37,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 851 transitions, 15507 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:37,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:37,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:41:37,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:40,370 INFO L124 PetriNetUnfolderBase]: 5841/8764 cut-off events. [2024-06-21 21:41:40,370 INFO L125 PetriNetUnfolderBase]: For 1811346/1811346 co-relation queries the response was YES. [2024-06-21 21:41:40,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98042 conditions, 8764 events. 5841/8764 cut-off events. For 1811346/1811346 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 50891 event pairs, 1839 based on Foata normal form. 2/8764 useless extension candidates. Maximal degree in co-relation 97815. Up to 8688 conditions per place. [2024-06-21 21:41:40,554 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 844 selfloop transitions, 16 changer transitions 0/863 dead transitions. [2024-06-21 21:41:40,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 863 transitions, 17333 flow [2024-06-21 21:41:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:41:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:41:40,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-06-21 21:41:40,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 21:41:40,555 INFO L175 Difference]: Start difference. First operand has 513 places, 851 transitions, 15507 flow. Second operand 6 states and 90 transitions. [2024-06-21 21:41:40,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 863 transitions, 17333 flow [2024-06-21 21:41:46,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 863 transitions, 17208 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 21:41:46,783 INFO L231 Difference]: Finished difference. Result has 515 places, 853 transitions, 15499 flow [2024-06-21 21:41:46,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15386, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=15499, PETRI_PLACES=515, PETRI_TRANSITIONS=853} [2024-06-21 21:41:46,784 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 474 predicate places. [2024-06-21 21:41:46,784 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 853 transitions, 15499 flow [2024-06-21 21:41:46,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:46,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:46,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:46,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 21:41:46,785 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)] === [2024-06-21 21:41:46,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:46,785 INFO L85 PathProgramCache]: Analyzing trace with hash 416003459, now seen corresponding path program 4 times [2024-06-21 21:41:46,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:46,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385460771] [2024-06-21 21:41:46,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:46,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:47,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:47,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385460771] [2024-06-21 21:41:47,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385460771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:47,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:47,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:41:47,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423065447] [2024-06-21 21:41:47,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:47,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:41:47,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:47,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:41:47,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:41:47,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:41:47,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 853 transitions, 15499 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:47,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:47,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:41:47,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:50,996 INFO L124 PetriNetUnfolderBase]: 5836/8757 cut-off events. [2024-06-21 21:41:50,996 INFO L125 PetriNetUnfolderBase]: For 1796438/1796438 co-relation queries the response was YES. [2024-06-21 21:41:51,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97559 conditions, 8757 events. 5836/8757 cut-off events. For 1796438/1796438 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 50845 event pairs, 1729 based on Foata normal form. 2/8757 useless extension candidates. Maximal degree in co-relation 97331. Up to 8639 conditions per place. [2024-06-21 21:41:51,155 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 829 selfloop transitions, 36 changer transitions 0/868 dead transitions. [2024-06-21 21:41:51,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 868 transitions, 17357 flow [2024-06-21 21:41:51,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:41:51,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:41:51,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-21 21:41:51,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:41:51,156 INFO L175 Difference]: Start difference. First operand has 515 places, 853 transitions, 15499 flow. Second operand 6 states and 96 transitions. [2024-06-21 21:41:51,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 868 transitions, 17357 flow