./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_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/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 21:31:21,540 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:31:21,618 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:31:21,623 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:31:21,623 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:31:21,650 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:31:21,650 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:31:21,651 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:31:21,651 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:31:21,654 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:31:21,654 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:31:21,654 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:31:21,655 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:31:21,655 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:31:21,655 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:31:21,655 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:31:21,656 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:31:21,656 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:31:21,656 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:31:21,656 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:31:21,656 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:31:21,657 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:31:21,657 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:31:21,657 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:31:21,658 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:31:21,658 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:31:21,658 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:31:21,658 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:31:21,659 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:31:21,659 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:31:21,660 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:31:21,660 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:31:21,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:31:21,660 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:31:21,660 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:31:21,661 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:31:21,661 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:31:21,661 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:31:21,661 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:31:21,661 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:31:21,662 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:31:21,662 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:31:21,662 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:31:21,662 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:31:21,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:31:21,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:31:21,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:31:21,945 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:31:21,946 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:31:21,947 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-21 21:31:22,100 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:31:22,100 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:31:22,100 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 21:31:23,166 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:31:23,376 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:31:23,381 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 21:31:23,401 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ef1318b1/a11d21f931e1407f988dab5c844ff508/FLAGb74897c59 [2024-06-21 21:31:23,415 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ef1318b1/a11d21f931e1407f988dab5c844ff508 [2024-06-21 21:31:23,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:31:23,417 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:31:23,419 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:31:23,419 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:31:23,423 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:31:23,423 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:31:22" (1/2) ... [2024-06-21 21:31:23,424 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@572afa53 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:31:23, skipping insertion in model container [2024-06-21 21:31:23,425 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:31:22" (1/2) ... [2024-06-21 21:31:23,426 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@69ff59fb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:31:23, skipping insertion in model container [2024-06-21 21:31:23,426 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:31:23" (2/2) ... [2024-06-21 21:31:23,426 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@572afa53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:31:23, skipping insertion in model container [2024-06-21 21:31:23,426 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:31:23" (2/2) ... [2024-06-21 21:31:23,426 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:31:23,493 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:31:23,494 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] (((((((((((((((((! multithreaded || y$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$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)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-21 21:31:23,494 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((! multithreaded || y$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$w_buff1 == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-21 21:31:23,495 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((! multithreaded || y$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$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)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-21 21:31:23,495 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:31:23,495 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-21 21:31:23,531 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:31:23,863 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:31:23,874 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:31:24,024 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:31:24,049 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:31:24,050 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:31:24 WrapperNode [2024-06-21 21:31:24,050 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:31:24,050 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:31:24,051 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:31:24,051 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:31:24,056 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:31:24" (1/1) ... [2024-06-21 21:31:24,071 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:31:24" (1/1) ... [2024-06-21 21:31:24,101 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-21 21:31:24,101 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:31:24,102 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:31:24,102 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:31:24,102 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:31:24,125 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:31:24" (1/1) ... [2024-06-21 21:31:24,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:31:24" (1/1) ... [2024-06-21 21:31:24,128 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:31:24" (1/1) ... [2024-06-21 21:31:24,173 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 21:31:24,182 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:31:24" (1/1) ... [2024-06-21 21:31:24,182 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:31:24" (1/1) ... [2024-06-21 21:31:24,192 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:31:24" (1/1) ... [2024-06-21 21:31:24,194 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:31:24" (1/1) ... [2024-06-21 21:31:24,195 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:31:24" (1/1) ... [2024-06-21 21:31:24,197 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:31:24" (1/1) ... [2024-06-21 21:31:24,200 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:31:24,200 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:31:24,200 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:31:24,201 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:31:24,201 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:31:24" (1/1) ... [2024-06-21 21:31:24,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:31:24,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:31:24,238 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 21:31:24,254 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 21:31:24,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:31:24,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:31:24,270 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:31:24,271 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:31:24,271 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:31:24,271 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:31:24,271 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:31:24,271 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:31:24,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:31:24,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:31:24,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:31:24,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:31:24,284 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 21:31:24,372 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:31:24,373 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:31:24,687 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:31:24,687 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:31:24,868 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:31:24,868 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:31:24,869 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:31:24 BoogieIcfgContainer [2024-06-21 21:31:24,869 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:31:24,871 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:31:24,871 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:31:24,873 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:31:24,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:31:22" (1/4) ... [2024-06-21 21:31:24,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee73ee7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:31:24, skipping insertion in model container [2024-06-21 21:31:24,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:31:23" (2/4) ... [2024-06-21 21:31:24,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee73ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:31:24, skipping insertion in model container [2024-06-21 21:31:24,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:31:24" (3/4) ... [2024-06-21 21:31:24,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee73ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:31:24, skipping insertion in model container [2024-06-21 21:31:24,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:31:24" (4/4) ... [2024-06-21 21:31:24,876 INFO L112 eAbstractionObserver]: Analyzing ICFG safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 21:31:24,889 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:31:24,889 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 21:31:24,889 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:31:24,928 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:31:24,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 21:31:24,985 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 21:31:24,985 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:31:24,987 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 61 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 21:31:24,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 21:31:24,990 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 21:31:25,002 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:31:25,008 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;@77fac670, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:31:25,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 21:31:25,012 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:31:25,013 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 21:31:25,013 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:31:25,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:25,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:31:25,014 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 21:31:25,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:25,018 INFO L85 PathProgramCache]: Analyzing trace with hash 441899971, now seen corresponding path program 1 times [2024-06-21 21:31:25,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:25,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656397685] [2024-06-21 21:31:25,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:25,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:25,883 INFO 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 21:31:25,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:25,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656397685] [2024-06-21 21:31:25,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656397685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:25,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:25,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:31:25,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822540234] [2024-06-21 21:31:25,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:25,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:31:25,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:25,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:31:25,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:31:25,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:31:25,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:25,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:25,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:31:25,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:26,362 INFO L124 PetriNetUnfolderBase]: 1354/2038 cut-off events. [2024-06-21 21:31:26,362 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-21 21:31:26,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4150 conditions, 2038 events. 1354/2038 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9585 event pairs, 709 based on Foata normal form. 4/2007 useless extension candidates. Maximal degree in co-relation 4138. Up to 2016 conditions per place. [2024-06-21 21:31:26,378 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 35 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-21 21:31:26,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 181 flow [2024-06-21 21:31:26,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:31:26,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:31:26,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-21 21:31:26,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 21:31:26,389 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 72 transitions. [2024-06-21 21:31:26,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 181 flow [2024-06-21 21:31:26,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 21:31:26,393 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 21:31:26,395 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 21:31:26,397 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 21:31:26,397 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 21:31:26,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:26,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:26,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:26,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:31:26,398 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 21:31:26,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:26,399 INFO L85 PathProgramCache]: Analyzing trace with hash -535779076, now seen corresponding path program 1 times [2024-06-21 21:31:26,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:26,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244811539] [2024-06-21 21:31:26,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:26,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:26,920 INFO 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 21:31:26,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:26,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244811539] [2024-06-21 21:31:26,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244811539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:26,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:26,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:31:26,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576032062] [2024-06-21 21:31:26,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:26,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:31:26,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:26,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:31:26,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:31:26,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 21:31:26,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:26,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:26,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 21:31:26,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:27,249 INFO L124 PetriNetUnfolderBase]: 1363/2050 cut-off events. [2024-06-21 21:31:27,250 INFO L125 PetriNetUnfolderBase]: For 316/319 co-relation queries the response was YES. [2024-06-21 21:31:27,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4738 conditions, 2050 events. 1363/2050 cut-off events. For 316/319 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9433 event pairs, 772 based on Foata normal form. 8/2057 useless extension candidates. Maximal degree in co-relation 4726. Up to 2013 conditions per place. [2024-06-21 21:31:27,259 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 45 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-21 21:31:27,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 266 flow [2024-06-21 21:31:27,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:31:27,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:31:27,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-21 21:31:27,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 21:31:27,261 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 92 transitions. [2024-06-21 21:31:27,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 266 flow [2024-06-21 21:31:27,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:31:27,263 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 154 flow [2024-06-21 21:31:27,263 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=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-21 21:31:27,263 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-21 21:31:27,263 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 154 flow [2024-06-21 21:31:27,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:27,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:27,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:27,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:31:27,264 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 21:31:27,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:27,265 INFO L85 PathProgramCache]: Analyzing trace with hash 570718658, now seen corresponding path program 1 times [2024-06-21 21:31:27,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:27,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594727263] [2024-06-21 21:31:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:27,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:27,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:27,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594727263] [2024-06-21 21:31:27,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594727263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:27,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:27,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:31:27,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986568540] [2024-06-21 21:31:27,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:27,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:31:27,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:27,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:31:27,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:31:27,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:31:27,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 154 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 21:31:27,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:27,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:31:27,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:28,274 INFO L124 PetriNetUnfolderBase]: 1664/2484 cut-off events. [2024-06-21 21:31:28,275 INFO L125 PetriNetUnfolderBase]: For 1152/1152 co-relation queries the response was YES. [2024-06-21 21:31:28,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6476 conditions, 2484 events. 1664/2484 cut-off events. For 1152/1152 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11396 event pairs, 791 based on Foata normal form. 6/2490 useless extension candidates. Maximal degree in co-relation 6461. Up to 2418 conditions per place. [2024-06-21 21:31:28,286 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 62 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2024-06-21 21:31:28,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 76 transitions, 407 flow [2024-06-21 21:31:28,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:31:28,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:31:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-21 21:31:28,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555 [2024-06-21 21:31:28,288 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 154 flow. Second operand 5 states and 111 transitions. [2024-06-21 21:31:28,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 76 transitions, 407 flow [2024-06-21 21:31:28,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 392 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-21 21:31:28,291 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 230 flow [2024-06-21 21:31:28,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2024-06-21 21:31:28,292 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-06-21 21:31:28,292 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 230 flow [2024-06-21 21:31:28,292 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 21:31:28,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:28,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:28,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:31:28,293 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 21:31:28,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:28,293 INFO L85 PathProgramCache]: Analyzing trace with hash 429293185, now seen corresponding path program 1 times [2024-06-21 21:31:28,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:28,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758455279] [2024-06-21 21:31:28,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:28,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:29,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:29,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758455279] [2024-06-21 21:31:29,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758455279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:29,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:29,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:31:29,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643950611] [2024-06-21 21:31:29,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:29,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:31:29,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:29,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:31:29,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:31:29,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:31:29,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:29,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:29,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:31:29,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:29,555 INFO L124 PetriNetUnfolderBase]: 1658/2475 cut-off events. [2024-06-21 21:31:29,555 INFO L125 PetriNetUnfolderBase]: For 2199/2199 co-relation queries the response was YES. [2024-06-21 21:31:29,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7118 conditions, 2475 events. 1658/2475 cut-off events. For 2199/2199 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11209 event pairs, 722 based on Foata normal form. 3/2478 useless extension candidates. Maximal degree in co-relation 7099. Up to 2418 conditions per place. [2024-06-21 21:31:29,569 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 69 selfloop transitions, 13 changer transitions 0/86 dead transitions. [2024-06-21 21:31:29,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 507 flow [2024-06-21 21:31:29,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:31:29,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:31:29,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-21 21:31:29,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-21 21:31:29,571 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 230 flow. Second operand 6 states and 124 transitions. [2024-06-21 21:31:29,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 507 flow [2024-06-21 21:31:29,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 503 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 21:31:29,605 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 325 flow [2024-06-21 21:31:29,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=325, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2024-06-21 21:31:29,606 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-21 21:31:29,606 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 325 flow [2024-06-21 21:31:29,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:29,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:29,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:29,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:31:29,607 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:29,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:29,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1295155967, now seen corresponding path program 1 times [2024-06-21 21:31:29,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:29,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040588557] [2024-06-21 21:31:29,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:29,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:30,437 INFO 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 21:31:30,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:30,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040588557] [2024-06-21 21:31:30,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040588557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:30,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:30,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:31:30,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32471835] [2024-06-21 21:31:30,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:30,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:31:30,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:30,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:31:30,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:31:30,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 21:31:30,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 325 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 21:31:30,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:30,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 21:31:30,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:30,944 INFO L124 PetriNetUnfolderBase]: 1649/2460 cut-off events. [2024-06-21 21:31:30,945 INFO L125 PetriNetUnfolderBase]: For 3519/3519 co-relation queries the response was YES. [2024-06-21 21:31:30,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7736 conditions, 2460 events. 1649/2460 cut-off events. For 3519/3519 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11068 event pairs, 558 based on Foata normal form. 6/2466 useless extension candidates. Maximal degree in co-relation 7712. Up to 2373 conditions per place. [2024-06-21 21:31:30,959 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 73 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2024-06-21 21:31:30,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 92 transitions, 587 flow [2024-06-21 21:31:30,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:31:30,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:31:30,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 21:31:30,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49642857142857144 [2024-06-21 21:31:30,961 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 325 flow. Second operand 7 states and 139 transitions. [2024-06-21 21:31:30,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 92 transitions, 587 flow [2024-06-21 21:31:30,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 92 transitions, 575 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-21 21:31:30,966 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 356 flow [2024-06-21 21:31:30,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=356, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-21 21:31:30,967 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-06-21 21:31:30,967 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 356 flow [2024-06-21 21:31:30,968 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 21:31:30,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:30,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:30,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:31:30,968 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 21:31:30,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:30,969 INFO L85 PathProgramCache]: Analyzing trace with hash 494709971, now seen corresponding path program 1 times [2024-06-21 21:31:30,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:30,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457704461] [2024-06-21 21:31:30,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:30,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:31,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:31,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457704461] [2024-06-21 21:31:31,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457704461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:31,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:31,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:31:31,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721619057] [2024-06-21 21:31:31,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:31,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:31:31,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:31,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:31:31,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:31:31,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:31:31,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 356 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 21:31:31,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:31,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:31:31,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:31,997 INFO L124 PetriNetUnfolderBase]: 1639/2447 cut-off events. [2024-06-21 21:31:31,997 INFO L125 PetriNetUnfolderBase]: For 4699/4701 co-relation queries the response was YES. [2024-06-21 21:31:32,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8162 conditions, 2447 events. 1639/2447 cut-off events. For 4699/4701 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11027 event pairs, 651 based on Foata normal form. 6/2453 useless extension candidates. Maximal degree in co-relation 8135. Up to 2407 conditions per place. [2024-06-21 21:31:32,011 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 61 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2024-06-21 21:31:32,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 74 transitions, 542 flow [2024-06-21 21:31:32,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:31:32,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:31:32,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-21 21:31:32,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-06-21 21:31:32,013 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 356 flow. Second operand 5 states and 83 transitions. [2024-06-21 21:31:32,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 74 transitions, 542 flow [2024-06-21 21:31:32,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 74 transitions, 507 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 21:31:32,018 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 369 flow [2024-06-21 21:31:32,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=369, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-06-21 21:31:32,019 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-06-21 21:31:32,019 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 369 flow [2024-06-21 21:31:32,019 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 21:31:32,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:32,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:32,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:31:32,020 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 21:31:32,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:32,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1174386298, now seen corresponding path program 1 times [2024-06-21 21:31:32,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:32,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097122558] [2024-06-21 21:31:32,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:32,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:32,669 INFO 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 21:31:32,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:32,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097122558] [2024-06-21 21:31:32,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097122558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:32,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:32,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:32,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682139238] [2024-06-21 21:31:32,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:32,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:32,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:32,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:32,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:32,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:31:32,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 369 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 21:31:32,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:32,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:31:32,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:33,143 INFO L124 PetriNetUnfolderBase]: 1689/2517 cut-off events. [2024-06-21 21:31:33,143 INFO L125 PetriNetUnfolderBase]: For 6225/6229 co-relation queries the response was YES. [2024-06-21 21:31:33,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8890 conditions, 2517 events. 1689/2517 cut-off events. For 6225/6229 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11471 event pairs, 628 based on Foata normal form. 9/2526 useless extension candidates. Maximal degree in co-relation 8861. Up to 2356 conditions per place. [2024-06-21 21:31:33,168 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 77 selfloop transitions, 24 changer transitions 0/104 dead transitions. [2024-06-21 21:31:33,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 104 transitions, 741 flow [2024-06-21 21:31:33,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:31:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:31:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 21:31:33,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-21 21:31:33,169 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 369 flow. Second operand 7 states and 129 transitions. [2024-06-21 21:31:33,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 104 transitions, 741 flow [2024-06-21 21:31:33,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 104 transitions, 717 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:31:33,174 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 444 flow [2024-06-21 21:31:33,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=444, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-21 21:31:33,175 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2024-06-21 21:31:33,175 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 444 flow [2024-06-21 21:31:33,175 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 21:31:33,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:33,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:33,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:31:33,176 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 21:31:33,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:33,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1502417574, now seen corresponding path program 2 times [2024-06-21 21:31:33,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:33,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280693941] [2024-06-21 21:31:33,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:33,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:33,866 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 21:31:33,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:33,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280693941] [2024-06-21 21:31:33,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280693941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:33,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:33,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:33,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487429806] [2024-06-21 21:31:33,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:33,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:33,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:33,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:33,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:33,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:31:33,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 444 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 21:31:33,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:33,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:31:33,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:34,454 INFO L124 PetriNetUnfolderBase]: 1741/2591 cut-off events. [2024-06-21 21:31:34,454 INFO L125 PetriNetUnfolderBase]: For 8531/8535 co-relation queries the response was YES. [2024-06-21 21:31:34,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9848 conditions, 2591 events. 1741/2591 cut-off events. For 8531/8535 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11811 event pairs, 646 based on Foata normal form. 9/2600 useless extension candidates. Maximal degree in co-relation 9818. Up to 2479 conditions per place. [2024-06-21 21:31:34,466 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 81 selfloop transitions, 21 changer transitions 0/105 dead transitions. [2024-06-21 21:31:34,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 105 transitions, 792 flow [2024-06-21 21:31:34,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:31:34,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:31:34,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 21:31:34,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-21 21:31:34,468 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 444 flow. Second operand 7 states and 123 transitions. [2024-06-21 21:31:34,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 105 transitions, 792 flow [2024-06-21 21:31:34,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 761 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 21:31:34,476 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 515 flow [2024-06-21 21:31:34,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=515, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-21 21:31:34,477 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-21 21:31:34,477 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 515 flow [2024-06-21 21:31:34,477 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 21:31:34,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:34,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:34,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:31:34,478 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 21:31:34,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:34,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1502417388, now seen corresponding path program 1 times [2024-06-21 21:31:34,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:34,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784502317] [2024-06-21 21:31:34,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:34,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:35,140 INFO 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 21:31:35,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:35,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784502317] [2024-06-21 21:31:35,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784502317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:35,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:35,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:35,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961739780] [2024-06-21 21:31:35,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:35,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:35,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:35,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:35,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:35,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:31:35,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 515 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 21:31:35,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:35,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:31:35,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:35,629 INFO L124 PetriNetUnfolderBase]: 1763/2624 cut-off events. [2024-06-21 21:31:35,630 INFO L125 PetriNetUnfolderBase]: For 10371/10371 co-relation queries the response was YES. [2024-06-21 21:31:35,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10307 conditions, 2624 events. 1763/2624 cut-off events. For 10371/10371 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11928 event pairs, 616 based on Foata normal form. 4/2627 useless extension candidates. Maximal degree in co-relation 10275. Up to 2498 conditions per place. [2024-06-21 21:31:35,642 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 87 selfloop transitions, 22 changer transitions 0/112 dead transitions. [2024-06-21 21:31:35,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 112 transitions, 910 flow [2024-06-21 21:31:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:31:35,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:31:35,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 21:31:35,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-21 21:31:35,644 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 515 flow. Second operand 7 states and 121 transitions. [2024-06-21 21:31:35,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 112 transitions, 910 flow [2024-06-21 21:31:35,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 112 transitions, 851 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 21:31:35,655 INFO L231 Difference]: Finished difference. Result has 77 places, 84 transitions, 608 flow [2024-06-21 21:31:35,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=608, PETRI_PLACES=77, PETRI_TRANSITIONS=84} [2024-06-21 21:31:35,656 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 36 predicate places. [2024-06-21 21:31:35,656 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 84 transitions, 608 flow [2024-06-21 21:31:35,656 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 21:31:35,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:35,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:35,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:31:35,657 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 21:31:35,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:35,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2105206030, now seen corresponding path program 2 times [2024-06-21 21:31:35,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:35,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517834975] [2024-06-21 21:31:35,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:35,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:36,290 INFO 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 21:31:36,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:36,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517834975] [2024-06-21 21:31:36,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517834975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:36,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:36,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:36,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765911878] [2024-06-21 21:31:36,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:36,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:36,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:36,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:36,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:36,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:31:36,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 608 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 21:31:36,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:36,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:31:36,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:36,775 INFO L124 PetriNetUnfolderBase]: 1785/2656 cut-off events. [2024-06-21 21:31:36,775 INFO L125 PetriNetUnfolderBase]: For 12814/12814 co-relation queries the response was YES. [2024-06-21 21:31:36,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11037 conditions, 2656 events. 1785/2656 cut-off events. For 12814/12814 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12027 event pairs, 614 based on Foata normal form. 4/2659 useless extension candidates. Maximal degree in co-relation 11002. Up to 2517 conditions per place. [2024-06-21 21:31:36,791 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 83 selfloop transitions, 25 changer transitions 0/111 dead transitions. [2024-06-21 21:31:36,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 111 transitions, 948 flow [2024-06-21 21:31:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:31:36,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:31:36,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 21:31:36,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44583333333333336 [2024-06-21 21:31:36,793 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 608 flow. Second operand 6 states and 107 transitions. [2024-06-21 21:31:36,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 111 transitions, 948 flow [2024-06-21 21:31:36,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 111 transitions, 914 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 21:31:36,806 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 683 flow [2024-06-21 21:31:36,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=683, PETRI_PLACES=82, PETRI_TRANSITIONS=88} [2024-06-21 21:31:36,807 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-06-21 21:31:36,807 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 683 flow [2024-06-21 21:31:36,807 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 21:31:36,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:36,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:36,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:31:36,808 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 21:31:36,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:36,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2105206216, now seen corresponding path program 3 times [2024-06-21 21:31:36,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:36,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13419647] [2024-06-21 21:31:36,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:36,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:37,378 INFO 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 21:31:37,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:37,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13419647] [2024-06-21 21:31:37,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13419647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:37,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:37,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:37,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027212951] [2024-06-21 21:31:37,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:37,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:37,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:37,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:37,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:37,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:31:37,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 88 transitions, 683 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 21:31:37,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:37,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:31:37,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:37,953 INFO L124 PetriNetUnfolderBase]: 1771/2636 cut-off events. [2024-06-21 21:31:37,954 INFO L125 PetriNetUnfolderBase]: For 14876/14878 co-relation queries the response was YES. [2024-06-21 21:31:37,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11324 conditions, 2636 events. 1771/2636 cut-off events. For 14876/14878 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11957 event pairs, 640 based on Foata normal form. 7/2643 useless extension candidates. Maximal degree in co-relation 11286. Up to 2518 conditions per place. [2024-06-21 21:31:37,971 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 87 selfloop transitions, 25 changer transitions 0/115 dead transitions. [2024-06-21 21:31:37,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 115 transitions, 995 flow [2024-06-21 21:31:37,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:31:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:31:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 21:31:37,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 21:31:37,973 INFO L175 Difference]: Start difference. First operand has 82 places, 88 transitions, 683 flow. Second operand 6 states and 110 transitions. [2024-06-21 21:31:37,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 115 transitions, 995 flow [2024-06-21 21:31:37,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 115 transitions, 939 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 21:31:37,991 INFO L231 Difference]: Finished difference. Result has 84 places, 88 transitions, 694 flow [2024-06-21 21:31:37,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=694, PETRI_PLACES=84, PETRI_TRANSITIONS=88} [2024-06-21 21:31:37,992 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-21 21:31:37,992 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 88 transitions, 694 flow [2024-06-21 21:31:37,993 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 21:31:37,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:37,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:37,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:31:37,993 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 21:31:37,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:37,994 INFO L85 PathProgramCache]: Analyzing trace with hash -224945392, now seen corresponding path program 3 times [2024-06-21 21:31:37,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:37,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254450623] [2024-06-21 21:31:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:37,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:38,636 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 21:31:38,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:38,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254450623] [2024-06-21 21:31:38,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254450623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:38,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:38,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:38,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722452747] [2024-06-21 21:31:38,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:38,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:38,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:38,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:38,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:38,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:31:38,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 88 transitions, 694 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 21:31:38,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:38,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:31:38,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:39,134 INFO L124 PetriNetUnfolderBase]: 1777/2657 cut-off events. [2024-06-21 21:31:39,135 INFO L125 PetriNetUnfolderBase]: For 15728/15728 co-relation queries the response was YES. [2024-06-21 21:31:39,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11375 conditions, 2657 events. 1777/2657 cut-off events. For 15728/15728 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12182 event pairs, 895 based on Foata normal form. 4/2661 useless extension candidates. Maximal degree in co-relation 11337. Up to 2587 conditions per place. [2024-06-21 21:31:39,149 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 93 selfloop transitions, 19 changer transitions 0/115 dead transitions. [2024-06-21 21:31:39,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 115 transitions, 1034 flow [2024-06-21 21:31:39,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:31:39,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:31:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-21 21:31:39,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.371875 [2024-06-21 21:31:39,150 INFO L175 Difference]: Start difference. First operand has 84 places, 88 transitions, 694 flow. Second operand 8 states and 119 transitions. [2024-06-21 21:31:39,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 115 transitions, 1034 flow [2024-06-21 21:31:39,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 115 transitions, 971 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 21:31:39,165 INFO L231 Difference]: Finished difference. Result has 89 places, 96 transitions, 762 flow [2024-06-21 21:31:39,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=762, PETRI_PLACES=89, PETRI_TRANSITIONS=96} [2024-06-21 21:31:39,166 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-21 21:31:39,166 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 96 transitions, 762 flow [2024-06-21 21:31:39,166 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 21:31:39,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:39,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:39,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:31:39,167 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 21:31:39,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:39,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1248015924, now seen corresponding path program 1 times [2024-06-21 21:31:39,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:39,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660486112] [2024-06-21 21:31:39,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:39,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:39,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:39,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660486112] [2024-06-21 21:31:39,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660486112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:39,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:39,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:39,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807994999] [2024-06-21 21:31:39,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:39,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:39,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:39,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:39,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:40,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:31:40,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 96 transitions, 762 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 21:31:40,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:40,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:31:40,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:40,531 INFO L124 PetriNetUnfolderBase]: 1769/2646 cut-off events. [2024-06-21 21:31:40,532 INFO L125 PetriNetUnfolderBase]: For 17592/17596 co-relation queries the response was YES. [2024-06-21 21:31:40,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11618 conditions, 2646 events. 1769/2646 cut-off events. For 17592/17596 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12136 event pairs, 880 based on Foata normal form. 8/2654 useless extension candidates. Maximal degree in co-relation 11577. Up to 2575 conditions per place. [2024-06-21 21:31:40,545 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 95 selfloop transitions, 15 changer transitions 0/113 dead transitions. [2024-06-21 21:31:40,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 113 transitions, 1038 flow [2024-06-21 21:31:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:31:40,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:31:40,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-21 21:31:40,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-21 21:31:40,547 INFO L175 Difference]: Start difference. First operand has 89 places, 96 transitions, 762 flow. Second operand 6 states and 97 transitions. [2024-06-21 21:31:40,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 113 transitions, 1038 flow [2024-06-21 21:31:40,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 113 transitions, 999 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 21:31:40,564 INFO L231 Difference]: Finished difference. Result has 91 places, 98 transitions, 782 flow [2024-06-21 21:31:40,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=782, PETRI_PLACES=91, PETRI_TRANSITIONS=98} [2024-06-21 21:31:40,565 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-21 21:31:40,565 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 98 transitions, 782 flow [2024-06-21 21:31:40,565 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 21:31:40,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:40,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:40,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:31:40,566 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 21:31:40,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:40,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1224558505, now seen corresponding path program 1 times [2024-06-21 21:31:40,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:40,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083660934] [2024-06-21 21:31:40,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:40,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:41,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:41,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083660934] [2024-06-21 21:31:41,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083660934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:41,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:41,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:41,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168154429] [2024-06-21 21:31:41,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:41,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:41,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:41,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:41,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:41,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:31:41,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 98 transitions, 782 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 21:31:41,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:41,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:31:41,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:42,054 INFO L124 PetriNetUnfolderBase]: 2022/2998 cut-off events. [2024-06-21 21:31:42,054 INFO L125 PetriNetUnfolderBase]: For 21456/21470 co-relation queries the response was YES. [2024-06-21 21:31:42,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13475 conditions, 2998 events. 2022/2998 cut-off events. For 21456/21470 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13900 event pairs, 598 based on Foata normal form. 19/3017 useless extension candidates. Maximal degree in co-relation 13434. Up to 2658 conditions per place. [2024-06-21 21:31:42,069 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 132 selfloop transitions, 67 changer transitions 0/202 dead transitions. [2024-06-21 21:31:42,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 202 transitions, 1762 flow [2024-06-21 21:31:42,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:31:42,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:31:42,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 21:31:42,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-21 21:31:42,072 INFO L175 Difference]: Start difference. First operand has 91 places, 98 transitions, 782 flow. Second operand 10 states and 185 transitions. [2024-06-21 21:31:42,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 202 transitions, 1762 flow [2024-06-21 21:31:42,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 202 transitions, 1721 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 21:31:42,087 INFO L231 Difference]: Finished difference. Result has 102 places, 151 transitions, 1376 flow [2024-06-21 21:31:42,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1376, PETRI_PLACES=102, PETRI_TRANSITIONS=151} [2024-06-21 21:31:42,088 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 61 predicate places. [2024-06-21 21:31:42,088 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 151 transitions, 1376 flow [2024-06-21 21:31:42,088 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 21:31:42,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:42,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:42,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:31:42,089 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 21:31:42,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:42,089 INFO L85 PathProgramCache]: Analyzing trace with hash 202853581, now seen corresponding path program 2 times [2024-06-21 21:31:42,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:42,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895723111] [2024-06-21 21:31:42,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:42,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:42,812 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 21:31:42,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:42,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895723111] [2024-06-21 21:31:42,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895723111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:42,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:42,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:42,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973106226] [2024-06-21 21:31:42,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:42,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:42,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:42,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:42,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:42,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:31:42,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 151 transitions, 1376 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:42,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:42,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:31:42,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:43,680 INFO L124 PetriNetUnfolderBase]: 2363/3512 cut-off events. [2024-06-21 21:31:43,680 INFO L125 PetriNetUnfolderBase]: For 32816/32826 co-relation queries the response was YES. [2024-06-21 21:31:43,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19185 conditions, 3512 events. 2363/3512 cut-off events. For 32816/32826 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 16677 event pairs, 761 based on Foata normal form. 10/3522 useless extension candidates. Maximal degree in co-relation 19138. Up to 2965 conditions per place. [2024-06-21 21:31:43,699 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 181 selfloop transitions, 97 changer transitions 0/281 dead transitions. [2024-06-21 21:31:43,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 281 transitions, 3160 flow [2024-06-21 21:31:43,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:31:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:31:43,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 21:31:43,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-21 21:31:43,701 INFO L175 Difference]: Start difference. First operand has 102 places, 151 transitions, 1376 flow. Second operand 9 states and 168 transitions. [2024-06-21 21:31:43,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 281 transitions, 3160 flow [2024-06-21 21:31:43,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 281 transitions, 3064 flow, removed 47 selfloop flow, removed 1 redundant places. [2024-06-21 21:31:43,740 INFO L231 Difference]: Finished difference. Result has 113 places, 222 transitions, 2375 flow [2024-06-21 21:31:43,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2375, PETRI_PLACES=113, PETRI_TRANSITIONS=222} [2024-06-21 21:31:43,741 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2024-06-21 21:31:43,741 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 222 transitions, 2375 flow [2024-06-21 21:31:43,741 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 21:31:43,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:43,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:43,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:31:43,742 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 21:31:43,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:43,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1350875793, now seen corresponding path program 3 times [2024-06-21 21:31:43,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:43,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105760106] [2024-06-21 21:31:43,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:43,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:44,344 INFO 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 21:31:44,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:44,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105760106] [2024-06-21 21:31:44,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105760106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:44,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:44,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:44,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060430620] [2024-06-21 21:31:44,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:44,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:44,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:44,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:44,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:44,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:31:44,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 222 transitions, 2375 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 21:31:44,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:44,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:31:44,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:45,329 INFO L124 PetriNetUnfolderBase]: 2491/3691 cut-off events. [2024-06-21 21:31:45,330 INFO L125 PetriNetUnfolderBase]: For 41759/41773 co-relation queries the response was YES. [2024-06-21 21:31:45,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22164 conditions, 3691 events. 2491/3691 cut-off events. For 41759/41773 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 17704 event pairs, 726 based on Foata normal form. 16/3707 useless extension candidates. Maximal degree in co-relation 22111. Up to 3070 conditions per place. [2024-06-21 21:31:45,355 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 174 selfloop transitions, 138 changer transitions 0/315 dead transitions. [2024-06-21 21:31:45,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 315 transitions, 3890 flow [2024-06-21 21:31:45,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:31:45,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:31:45,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-21 21:31:45,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 21:31:45,357 INFO L175 Difference]: Start difference. First operand has 113 places, 222 transitions, 2375 flow. Second operand 11 states and 209 transitions. [2024-06-21 21:31:45,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 315 transitions, 3890 flow [2024-06-21 21:31:45,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 315 transitions, 3753 flow, removed 62 selfloop flow, removed 2 redundant places. [2024-06-21 21:31:45,421 INFO L231 Difference]: Finished difference. Result has 124 places, 252 transitions, 3046 flow [2024-06-21 21:31:45,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2312, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3046, PETRI_PLACES=124, PETRI_TRANSITIONS=252} [2024-06-21 21:31:45,422 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-21 21:31:45,422 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 252 transitions, 3046 flow [2024-06-21 21:31:45,422 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 21:31:45,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:45,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:45,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:31:45,423 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 21:31:45,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:45,423 INFO L85 PathProgramCache]: Analyzing trace with hash -753561710, now seen corresponding path program 1 times [2024-06-21 21:31:45,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:45,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622516964] [2024-06-21 21:31:45,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:45,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:45,954 INFO 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 21:31:45,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:45,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622516964] [2024-06-21 21:31:45,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622516964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:45,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:45,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:45,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918391869] [2024-06-21 21:31:45,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:45,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:45,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:45,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:45,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:46,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:31:46,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 252 transitions, 3046 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 21:31:46,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:46,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:31:46,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:46,822 INFO L124 PetriNetUnfolderBase]: 2659/3932 cut-off events. [2024-06-21 21:31:46,822 INFO L125 PetriNetUnfolderBase]: For 53331/53339 co-relation queries the response was YES. [2024-06-21 21:31:46,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25397 conditions, 3932 events. 2659/3932 cut-off events. For 53331/53339 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18968 event pairs, 757 based on Foata normal form. 16/3948 useless extension candidates. Maximal degree in co-relation 25340. Up to 3002 conditions per place. [2024-06-21 21:31:46,848 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 185 selfloop transitions, 150 changer transitions 0/338 dead transitions. [2024-06-21 21:31:46,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 338 transitions, 4618 flow [2024-06-21 21:31:46,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:31:46,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:31:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 21:31:46,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-21 21:31:46,850 INFO L175 Difference]: Start difference. First operand has 124 places, 252 transitions, 3046 flow. Second operand 9 states and 170 transitions. [2024-06-21 21:31:46,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 338 transitions, 4618 flow [2024-06-21 21:31:46,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 338 transitions, 4467 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 21:31:46,916 INFO L231 Difference]: Finished difference. Result has 130 places, 287 transitions, 3804 flow [2024-06-21 21:31:46,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2903, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3804, PETRI_PLACES=130, PETRI_TRANSITIONS=287} [2024-06-21 21:31:46,917 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-06-21 21:31:46,917 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 287 transitions, 3804 flow [2024-06-21 21:31:46,917 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 21:31:46,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:46,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:46,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:31:46,918 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 21:31:46,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:46,918 INFO L85 PathProgramCache]: Analyzing trace with hash 202943791, now seen corresponding path program 4 times [2024-06-21 21:31:46,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:46,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801998888] [2024-06-21 21:31:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:46,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:47,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:47,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801998888] [2024-06-21 21:31:47,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801998888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:47,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:47,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:47,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718450284] [2024-06-21 21:31:47,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:47,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:47,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:47,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:47,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:47,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:31:47,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 287 transitions, 3804 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 21:31:47,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:47,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:31:47,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:48,752 INFO L124 PetriNetUnfolderBase]: 2894/4265 cut-off events. [2024-06-21 21:31:48,752 INFO L125 PetriNetUnfolderBase]: For 61419/61429 co-relation queries the response was YES. [2024-06-21 21:31:48,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29109 conditions, 4265 events. 2894/4265 cut-off events. For 61419/61429 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21050 event pairs, 780 based on Foata normal form. 20/4285 useless extension candidates. Maximal degree in co-relation 29047. Up to 3748 conditions per place. [2024-06-21 21:31:48,785 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 262 selfloop transitions, 129 changer transitions 0/394 dead transitions. [2024-06-21 21:31:48,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 394 transitions, 5644 flow [2024-06-21 21:31:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:31:48,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:31:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 21:31:48,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 21:31:48,786 INFO L175 Difference]: Start difference. First operand has 130 places, 287 transitions, 3804 flow. Second operand 9 states and 165 transitions. [2024-06-21 21:31:48,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 394 transitions, 5644 flow [2024-06-21 21:31:48,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 394 transitions, 5479 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-21 21:31:48,863 INFO L231 Difference]: Finished difference. Result has 140 places, 349 transitions, 4847 flow [2024-06-21 21:31:48,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3641, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4847, PETRI_PLACES=140, PETRI_TRANSITIONS=349} [2024-06-21 21:31:48,863 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-21 21:31:48,863 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 349 transitions, 4847 flow [2024-06-21 21:31:48,863 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 21:31:48,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:48,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:48,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:31:48,864 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 21:31:48,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:48,864 INFO L85 PathProgramCache]: Analyzing trace with hash 709290212, now seen corresponding path program 2 times [2024-06-21 21:31:48,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:48,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893526231] [2024-06-21 21:31:48,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:48,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:49,486 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 21:31:49,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:49,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893526231] [2024-06-21 21:31:49,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893526231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:49,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:49,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:49,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092671157] [2024-06-21 21:31:49,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:49,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:49,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:49,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:49,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:49,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:31:49,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 349 transitions, 4847 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 21:31:49,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:49,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:31:49,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:50,640 INFO L124 PetriNetUnfolderBase]: 3115/4587 cut-off events. [2024-06-21 21:31:50,641 INFO L125 PetriNetUnfolderBase]: For 71522/71541 co-relation queries the response was YES. [2024-06-21 21:31:50,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33076 conditions, 4587 events. 3115/4587 cut-off events. For 71522/71541 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 22744 event pairs, 655 based on Foata normal form. 22/4609 useless extension candidates. Maximal degree in co-relation 33008. Up to 3486 conditions per place. [2024-06-21 21:31:50,678 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 247 selfloop transitions, 193 changer transitions 0/443 dead transitions. [2024-06-21 21:31:50,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 443 transitions, 6850 flow [2024-06-21 21:31:50,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:31:50,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:31:50,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 21:31:50,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-21 21:31:50,680 INFO L175 Difference]: Start difference. First operand has 140 places, 349 transitions, 4847 flow. Second operand 9 states and 172 transitions. [2024-06-21 21:31:50,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 443 transitions, 6850 flow [2024-06-21 21:31:50,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 443 transitions, 6661 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-21 21:31:50,810 INFO L231 Difference]: Finished difference. Result has 149 places, 390 transitions, 5794 flow [2024-06-21 21:31:50,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4663, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5794, PETRI_PLACES=149, PETRI_TRANSITIONS=390} [2024-06-21 21:31:50,811 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-21 21:31:50,811 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 390 transitions, 5794 flow [2024-06-21 21:31:50,811 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 21:31:50,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:50,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:50,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:31:50,812 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 21:31:50,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:50,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1151341206, now seen corresponding path program 3 times [2024-06-21 21:31:50,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:50,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982616403] [2024-06-21 21:31:50,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:50,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:51,544 INFO 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 21:31:51,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:51,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982616403] [2024-06-21 21:31:51,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982616403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:51,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:51,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:51,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636999021] [2024-06-21 21:31:51,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:51,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:51,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:51,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:51,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:51,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:31:51,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 390 transitions, 5794 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 21:31:51,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:51,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:31:51,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:52,776 INFO L124 PetriNetUnfolderBase]: 3249/4781 cut-off events. [2024-06-21 21:31:52,776 INFO L125 PetriNetUnfolderBase]: For 84229/84233 co-relation queries the response was YES. [2024-06-21 21:31:52,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36007 conditions, 4781 events. 3249/4781 cut-off events. For 84229/84233 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 23884 event pairs, 914 based on Foata normal form. 8/4789 useless extension candidates. Maximal degree in co-relation 35935. Up to 4317 conditions per place. [2024-06-21 21:31:52,816 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 361 selfloop transitions, 106 changer transitions 0/470 dead transitions. [2024-06-21 21:31:52,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 470 transitions, 7712 flow [2024-06-21 21:31:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:31:52,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:31:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-21 21:31:52,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-21 21:31:52,818 INFO L175 Difference]: Start difference. First operand has 149 places, 390 transitions, 5794 flow. Second operand 11 states and 192 transitions. [2024-06-21 21:31:52,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 470 transitions, 7712 flow [2024-06-21 21:31:52,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 470 transitions, 7451 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-21 21:31:52,951 INFO L231 Difference]: Finished difference. Result has 161 places, 418 transitions, 6335 flow [2024-06-21 21:31:52,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5552, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6335, PETRI_PLACES=161, PETRI_TRANSITIONS=418} [2024-06-21 21:31:52,951 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-06-21 21:31:52,952 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 418 transitions, 6335 flow [2024-06-21 21:31:52,952 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 21:31:52,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:52,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:52,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:31:52,952 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 21:31:52,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:52,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1120948806, now seen corresponding path program 4 times [2024-06-21 21:31:52,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:52,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55174686] [2024-06-21 21:31:52,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:52,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:53,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:53,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55174686] [2024-06-21 21:31:53,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55174686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:53,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:53,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:53,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562204332] [2024-06-21 21:31:53,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:53,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:53,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:53,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:53,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:53,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:31:53,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 418 transitions, 6335 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 21:31:53,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:53,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:31:53,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:54,812 INFO L124 PetriNetUnfolderBase]: 3227/4753 cut-off events. [2024-06-21 21:31:54,812 INFO L125 PetriNetUnfolderBase]: For 90380/90384 co-relation queries the response was YES. [2024-06-21 21:31:54,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35841 conditions, 4753 events. 3227/4753 cut-off events. For 90380/90384 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 23757 event pairs, 914 based on Foata normal form. 14/4767 useless extension candidates. Maximal degree in co-relation 35764. Up to 4310 conditions per place. [2024-06-21 21:31:54,852 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 352 selfloop transitions, 104 changer transitions 0/459 dead transitions. [2024-06-21 21:31:54,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 459 transitions, 7645 flow [2024-06-21 21:31:54,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:31:54,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:31:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:31:54,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:31:54,853 INFO L175 Difference]: Start difference. First operand has 161 places, 418 transitions, 6335 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:31:54,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 459 transitions, 7645 flow [2024-06-21 21:31:54,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 459 transitions, 7399 flow, removed 82 selfloop flow, removed 3 redundant places. [2024-06-21 21:31:55,003 INFO L231 Difference]: Finished difference. Result has 167 places, 418 transitions, 6317 flow [2024-06-21 21:31:55,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6089, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6317, PETRI_PLACES=167, PETRI_TRANSITIONS=418} [2024-06-21 21:31:55,005 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-21 21:31:55,005 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 418 transitions, 6317 flow [2024-06-21 21:31:55,005 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 21:31:55,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:55,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:55,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:31:55,006 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 21:31:55,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:55,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1120948651, now seen corresponding path program 5 times [2024-06-21 21:31:55,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:55,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706639848] [2024-06-21 21:31:55,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:55,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:55,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:55,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706639848] [2024-06-21 21:31:55,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706639848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:55,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:55,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:55,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719773259] [2024-06-21 21:31:55,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:55,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:55,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:55,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:55,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:55,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:31:55,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 418 transitions, 6317 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 21:31:55,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:55,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:31:55,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:57,173 INFO L124 PetriNetUnfolderBase]: 3266/4805 cut-off events. [2024-06-21 21:31:57,173 INFO L125 PetriNetUnfolderBase]: For 93484/93490 co-relation queries the response was YES. [2024-06-21 21:31:57,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36033 conditions, 4805 events. 3266/4805 cut-off events. For 93484/93490 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24128 event pairs, 928 based on Foata normal form. 16/4821 useless extension candidates. Maximal degree in co-relation 35955. Up to 4535 conditions per place. [2024-06-21 21:31:57,216 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 400 selfloop transitions, 70 changer transitions 0/473 dead transitions. [2024-06-21 21:31:57,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 473 transitions, 7730 flow [2024-06-21 21:31:57,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:31:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:31:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:31:57,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-21 21:31:57,217 INFO L175 Difference]: Start difference. First operand has 167 places, 418 transitions, 6317 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:31:57,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 473 transitions, 7730 flow [2024-06-21 21:31:57,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 473 transitions, 7522 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 21:31:57,352 INFO L231 Difference]: Finished difference. Result has 170 places, 434 transitions, 6526 flow [2024-06-21 21:31:57,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6109, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6526, PETRI_PLACES=170, PETRI_TRANSITIONS=434} [2024-06-21 21:31:57,353 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 129 predicate places. [2024-06-21 21:31:57,353 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 434 transitions, 6526 flow [2024-06-21 21:31:57,353 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 21:31:57,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:57,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:57,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:31:57,353 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 21:31:57,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:57,354 INFO L85 PathProgramCache]: Analyzing trace with hash 665887493, now seen corresponding path program 6 times [2024-06-21 21:31:57,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:57,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799262819] [2024-06-21 21:31:57,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:57,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:58,141 INFO 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 21:31:58,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:58,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799262819] [2024-06-21 21:31:58,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799262819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:58,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:58,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:31:58,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797086067] [2024-06-21 21:31:58,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:58,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:31:58,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:58,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:31:58,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:31:58,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:31:58,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 434 transitions, 6526 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 21:31:58,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:58,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:31:58,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:59,207 INFO L124 PetriNetUnfolderBase]: 3357/4938 cut-off events. [2024-06-21 21:31:59,207 INFO L125 PetriNetUnfolderBase]: For 101170/101178 co-relation queries the response was YES. [2024-06-21 21:31:59,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37975 conditions, 4938 events. 3357/4938 cut-off events. For 101170/101178 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 24873 event pairs, 798 based on Foata normal form. 9/4947 useless extension candidates. Maximal degree in co-relation 37894. Up to 3878 conditions per place. [2024-06-21 21:31:59,247 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 265 selfloop transitions, 240 changer transitions 0/508 dead transitions. [2024-06-21 21:31:59,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 508 transitions, 8517 flow [2024-06-21 21:31:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:31:59,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:31:59,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 21:31:59,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 21:31:59,248 INFO L175 Difference]: Start difference. First operand has 170 places, 434 transitions, 6526 flow. Second operand 8 states and 150 transitions. [2024-06-21 21:31:59,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 508 transitions, 8517 flow [2024-06-21 21:31:59,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 508 transitions, 8342 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-21 21:31:59,404 INFO L231 Difference]: Finished difference. Result has 176 places, 461 transitions, 7536 flow [2024-06-21 21:31:59,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6351, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7536, PETRI_PLACES=176, PETRI_TRANSITIONS=461} [2024-06-21 21:31:59,405 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 135 predicate places. [2024-06-21 21:31:59,405 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 461 transitions, 7536 flow [2024-06-21 21:31:59,405 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 21:31:59,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:59,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:59,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:31:59,405 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 21:31:59,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:59,405 INFO L85 PathProgramCache]: Analyzing trace with hash -469429534, now seen corresponding path program 5 times [2024-06-21 21:31:59,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:59,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967907101] [2024-06-21 21:31:59,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:59,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:00,117 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 21:32:00,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:00,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967907101] [2024-06-21 21:32:00,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967907101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:00,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:00,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:00,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339837263] [2024-06-21 21:32:00,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:00,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:00,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:00,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:00,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:00,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:32:00,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 461 transitions, 7536 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 21:32:00,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:00,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:32:00,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:01,377 INFO L124 PetriNetUnfolderBase]: 3818/5612 cut-off events. [2024-06-21 21:32:01,378 INFO L125 PetriNetUnfolderBase]: For 129275/129277 co-relation queries the response was YES. [2024-06-21 21:32:01,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46008 conditions, 5612 events. 3818/5612 cut-off events. For 129275/129277 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28813 event pairs, 1112 based on Foata normal form. 13/5625 useless extension candidates. Maximal degree in co-relation 45925. Up to 4616 conditions per place. [2024-06-21 21:32:01,429 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 397 selfloop transitions, 218 changer transitions 0/618 dead transitions. [2024-06-21 21:32:01,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 618 transitions, 11476 flow [2024-06-21 21:32:01,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:32:01,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:32:01,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 21:32:01,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-21 21:32:01,431 INFO L175 Difference]: Start difference. First operand has 176 places, 461 transitions, 7536 flow. Second operand 9 states and 154 transitions. [2024-06-21 21:32:01,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 618 transitions, 11476 flow [2024-06-21 21:32:01,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 618 transitions, 11298 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 21:32:01,672 INFO L231 Difference]: Finished difference. Result has 184 places, 567 transitions, 10203 flow [2024-06-21 21:32:01,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7392, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10203, PETRI_PLACES=184, PETRI_TRANSITIONS=567} [2024-06-21 21:32:01,673 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 143 predicate places. [2024-06-21 21:32:01,673 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 567 transitions, 10203 flow [2024-06-21 21:32:01,673 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 21:32:01,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:01,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:01,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:32:01,674 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 21:32:01,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:01,674 INFO L85 PathProgramCache]: Analyzing trace with hash -173290833, now seen corresponding path program 7 times [2024-06-21 21:32:01,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:01,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179254501] [2024-06-21 21:32:01,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:01,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:02,531 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 21:32:02,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:02,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179254501] [2024-06-21 21:32:02,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179254501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:02,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:02,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:02,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000625450] [2024-06-21 21:32:02,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:02,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:02,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:02,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:02,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:02,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:32:02,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 567 transitions, 10203 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 21:32:02,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:02,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:32:02,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:03,834 INFO L124 PetriNetUnfolderBase]: 3842/5635 cut-off events. [2024-06-21 21:32:03,834 INFO L125 PetriNetUnfolderBase]: For 133908/133923 co-relation queries the response was YES. [2024-06-21 21:32:03,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48145 conditions, 5635 events. 3842/5635 cut-off events. For 133908/133923 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28958 event pairs, 924 based on Foata normal form. 24/5659 useless extension candidates. Maximal degree in co-relation 48058. Up to 4929 conditions per place. [2024-06-21 21:32:03,887 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 426 selfloop transitions, 188 changer transitions 0/617 dead transitions. [2024-06-21 21:32:03,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 617 transitions, 11902 flow [2024-06-21 21:32:03,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:32:03,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:32:03,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 21:32:03,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:32:03,889 INFO L175 Difference]: Start difference. First operand has 184 places, 567 transitions, 10203 flow. Second operand 8 states and 144 transitions. [2024-06-21 21:32:03,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 617 transitions, 11902 flow [2024-06-21 21:32:04,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 617 transitions, 11599 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-21 21:32:04,174 INFO L231 Difference]: Finished difference. Result has 188 places, 579 transitions, 10555 flow [2024-06-21 21:32:04,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9901, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10555, PETRI_PLACES=188, PETRI_TRANSITIONS=579} [2024-06-21 21:32:04,174 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-21 21:32:04,174 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 579 transitions, 10555 flow [2024-06-21 21:32:04,174 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 21:32:04,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:04,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:04,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:32:04,175 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 21:32:04,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:04,175 INFO L85 PathProgramCache]: Analyzing trace with hash 669696773, now seen corresponding path program 8 times [2024-06-21 21:32:04,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:04,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511142830] [2024-06-21 21:32:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:04,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:04,989 INFO 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 21:32:04,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:04,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511142830] [2024-06-21 21:32:04,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511142830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:04,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:04,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:04,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448586336] [2024-06-21 21:32:04,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:04,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:04,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:04,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:04,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:05,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:32:05,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 579 transitions, 10555 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 21:32:05,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:05,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:32:05,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:06,316 INFO L124 PetriNetUnfolderBase]: 3904/5730 cut-off events. [2024-06-21 21:32:06,316 INFO L125 PetriNetUnfolderBase]: For 145014/145021 co-relation queries the response was YES. [2024-06-21 21:32:06,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49917 conditions, 5730 events. 3904/5730 cut-off events. For 145014/145021 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 29502 event pairs, 1041 based on Foata normal form. 17/5747 useless extension candidates. Maximal degree in co-relation 49829. Up to 5322 conditions per place. [2024-06-21 21:32:06,376 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 524 selfloop transitions, 109 changer transitions 0/636 dead transitions. [2024-06-21 21:32:06,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 636 transitions, 12592 flow [2024-06-21 21:32:06,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:32:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:32:06,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 21:32:06,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 21:32:06,377 INFO L175 Difference]: Start difference. First operand has 188 places, 579 transitions, 10555 flow. Second operand 8 states and 140 transitions. [2024-06-21 21:32:06,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 636 transitions, 12592 flow [2024-06-21 21:32:06,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 636 transitions, 12207 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 21:32:06,781 INFO L231 Difference]: Finished difference. Result has 191 places, 599 transitions, 10915 flow [2024-06-21 21:32:06,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10170, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10915, PETRI_PLACES=191, PETRI_TRANSITIONS=599} [2024-06-21 21:32:06,781 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2024-06-21 21:32:06,782 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 599 transitions, 10915 flow [2024-06-21 21:32:06,782 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 21:32:06,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:06,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:06,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:32:06,782 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:06,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:06,783 INFO L85 PathProgramCache]: Analyzing trace with hash 669702508, now seen corresponding path program 6 times [2024-06-21 21:32:06,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:06,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175356382] [2024-06-21 21:32:06,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:06,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:07,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:07,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175356382] [2024-06-21 21:32:07,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175356382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:07,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:07,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:07,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922533381] [2024-06-21 21:32:07,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:07,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:07,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:07,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:07,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:07,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:32:07,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 599 transitions, 10915 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 21:32:07,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:07,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:32:07,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:08,962 INFO L124 PetriNetUnfolderBase]: 4204/6165 cut-off events. [2024-06-21 21:32:08,962 INFO L125 PetriNetUnfolderBase]: For 166219/166224 co-relation queries the response was YES. [2024-06-21 21:32:08,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54826 conditions, 6165 events. 4204/6165 cut-off events. For 166219/166224 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 32046 event pairs, 1019 based on Foata normal form. 12/6177 useless extension candidates. Maximal degree in co-relation 54736. Up to 5330 conditions per place. [2024-06-21 21:32:09,025 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 515 selfloop transitions, 193 changer transitions 0/711 dead transitions. [2024-06-21 21:32:09,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 711 transitions, 14151 flow [2024-06-21 21:32:09,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:32:09,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:32:09,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 21:32:09,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-21 21:32:09,026 INFO L175 Difference]: Start difference. First operand has 191 places, 599 transitions, 10915 flow. Second operand 10 states and 173 transitions. [2024-06-21 21:32:09,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 711 transitions, 14151 flow [2024-06-21 21:32:09,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 711 transitions, 13808 flow, removed 86 selfloop flow, removed 6 redundant places. [2024-06-21 21:32:09,386 INFO L231 Difference]: Finished difference. Result has 197 places, 652 transitions, 12330 flow [2024-06-21 21:32:09,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10586, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12330, PETRI_PLACES=197, PETRI_TRANSITIONS=652} [2024-06-21 21:32:09,387 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-21 21:32:09,387 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 652 transitions, 12330 flow [2024-06-21 21:32:09,387 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 21:32:09,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:09,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:09,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:32:09,387 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 21:32:09,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:09,388 INFO L85 PathProgramCache]: Analyzing trace with hash 669696928, now seen corresponding path program 7 times [2024-06-21 21:32:09,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:09,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853768370] [2024-06-21 21:32:09,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:09,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:10,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:10,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853768370] [2024-06-21 21:32:10,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853768370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:10,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:10,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:10,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305888042] [2024-06-21 21:32:10,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:10,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:10,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:10,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:10,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:10,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:32:10,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 652 transitions, 12330 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 21:32:10,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:10,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:32:10,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:11,587 INFO L124 PetriNetUnfolderBase]: 4157/6098 cut-off events. [2024-06-21 21:32:11,587 INFO L125 PetriNetUnfolderBase]: For 164431/164436 co-relation queries the response was YES. [2024-06-21 21:32:11,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54416 conditions, 6098 events. 4157/6098 cut-off events. For 164431/164436 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 31624 event pairs, 1014 based on Foata normal form. 19/6117 useless extension candidates. Maximal degree in co-relation 54323. Up to 5300 conditions per place. [2024-06-21 21:32:11,646 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 511 selfloop transitions, 185 changer transitions 0/699 dead transitions. [2024-06-21 21:32:11,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 699 transitions, 14247 flow [2024-06-21 21:32:11,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:32:11,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:32:11,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:32:11,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-21 21:32:11,647 INFO L175 Difference]: Start difference. First operand has 197 places, 652 transitions, 12330 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:32:11,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 699 transitions, 14247 flow [2024-06-21 21:32:12,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 699 transitions, 13897 flow, removed 148 selfloop flow, removed 5 redundant places. [2024-06-21 21:32:12,033 INFO L231 Difference]: Finished difference. Result has 200 places, 652 transitions, 12412 flow [2024-06-21 21:32:12,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11988, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12412, PETRI_PLACES=200, PETRI_TRANSITIONS=652} [2024-06-21 21:32:12,033 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-21 21:32:12,034 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 652 transitions, 12412 flow [2024-06-21 21:32:12,034 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 21:32:12,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:12,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:12,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:32:12,034 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 21:32:12,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:12,035 INFO L85 PathProgramCache]: Analyzing trace with hash -836876210, now seen corresponding path program 8 times [2024-06-21 21:32:12,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:12,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040405507] [2024-06-21 21:32:12,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:12,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:12,660 INFO 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 21:32:12,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:12,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040405507] [2024-06-21 21:32:12,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040405507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:12,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:12,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:12,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8441949] [2024-06-21 21:32:12,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:12,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:12,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:12,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:12,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:12,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:32:12,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 652 transitions, 12412 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 21:32:12,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:12,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:32:12,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:14,208 INFO L124 PetriNetUnfolderBase]: 4303/6314 cut-off events. [2024-06-21 21:32:14,208 INFO L125 PetriNetUnfolderBase]: For 168484/168494 co-relation queries the response was YES. [2024-06-21 21:32:14,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56841 conditions, 6314 events. 4303/6314 cut-off events. For 168484/168494 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 32981 event pairs, 821 based on Foata normal form. 14/6328 useless extension candidates. Maximal degree in co-relation 56747. Up to 5562 conditions per place. [2024-06-21 21:32:14,285 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 561 selfloop transitions, 160 changer transitions 0/724 dead transitions. [2024-06-21 21:32:14,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 724 transitions, 15019 flow [2024-06-21 21:32:14,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:32:14,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:32:14,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 21:32:14,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 21:32:14,286 INFO L175 Difference]: Start difference. First operand has 200 places, 652 transitions, 12412 flow. Second operand 7 states and 128 transitions. [2024-06-21 21:32:14,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 724 transitions, 15019 flow [2024-06-21 21:32:14,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 724 transitions, 14616 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 21:32:14,691 INFO L231 Difference]: Finished difference. Result has 200 places, 681 transitions, 13128 flow [2024-06-21 21:32:14,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12017, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13128, PETRI_PLACES=200, PETRI_TRANSITIONS=681} [2024-06-21 21:32:14,692 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-21 21:32:14,692 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 681 transitions, 13128 flow [2024-06-21 21:32:14,693 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 21:32:14,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:14,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:14,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:32:14,693 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 21:32:14,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:14,693 INFO L85 PathProgramCache]: Analyzing trace with hash -836881945, now seen corresponding path program 9 times [2024-06-21 21:32:14,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:14,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727982118] [2024-06-21 21:32:14,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:14,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:15,458 INFO 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 21:32:15,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:15,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727982118] [2024-06-21 21:32:15,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727982118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:15,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:15,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:15,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319937201] [2024-06-21 21:32:15,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:15,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:15,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:15,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:15,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:15,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:32:15,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 681 transitions, 13128 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 21:32:15,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:15,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:32:15,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:16,914 INFO L124 PetriNetUnfolderBase]: 4280/6287 cut-off events. [2024-06-21 21:32:16,914 INFO L125 PetriNetUnfolderBase]: For 166781/166794 co-relation queries the response was YES. [2024-06-21 21:32:16,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56562 conditions, 6287 events. 4280/6287 cut-off events. For 166781/166794 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33000 event pairs, 990 based on Foata normal form. 24/6311 useless extension candidates. Maximal degree in co-relation 56467. Up to 5606 conditions per place. [2024-06-21 21:32:16,993 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 553 selfloop transitions, 168 changer transitions 0/724 dead transitions. [2024-06-21 21:32:16,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 724 transitions, 15052 flow [2024-06-21 21:32:16,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:32:16,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:32:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 21:32:16,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-21 21:32:16,995 INFO L175 Difference]: Start difference. First operand has 200 places, 681 transitions, 13128 flow. Second operand 7 states and 134 transitions. [2024-06-21 21:32:16,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 724 transitions, 15052 flow [2024-06-21 21:32:17,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 724 transitions, 14589 flow, removed 133 selfloop flow, removed 4 redundant places. [2024-06-21 21:32:17,449 INFO L231 Difference]: Finished difference. Result has 203 places, 681 transitions, 13076 flow [2024-06-21 21:32:17,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12665, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13076, PETRI_PLACES=203, PETRI_TRANSITIONS=681} [2024-06-21 21:32:17,450 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-21 21:32:17,450 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 681 transitions, 13076 flow [2024-06-21 21:32:17,451 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 21:32:17,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:17,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:17,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:32:17,451 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 21:32:17,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:17,452 INFO L85 PathProgramCache]: Analyzing trace with hash -836881790, now seen corresponding path program 9 times [2024-06-21 21:32:17,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:17,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033914867] [2024-06-21 21:32:17,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:17,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:18,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:18,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033914867] [2024-06-21 21:32:18,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033914867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:18,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:18,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:18,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843404065] [2024-06-21 21:32:18,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:18,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:18,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:18,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:18,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:18,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:32:18,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 681 transitions, 13076 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 21:32:18,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:18,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:32:18,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:19,550 INFO L124 PetriNetUnfolderBase]: 4233/6225 cut-off events. [2024-06-21 21:32:19,550 INFO L125 PetriNetUnfolderBase]: For 169259/169264 co-relation queries the response was YES. [2024-06-21 21:32:19,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55479 conditions, 6225 events. 4233/6225 cut-off events. For 169259/169264 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 32657 event pairs, 992 based on Foata normal form. 19/6244 useless extension candidates. Maximal degree in co-relation 55384. Up to 5523 conditions per place. [2024-06-21 21:32:19,633 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 555 selfloop transitions, 165 changer transitions 0/723 dead transitions. [2024-06-21 21:32:19,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 723 transitions, 15008 flow [2024-06-21 21:32:19,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:32:19,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:32:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 21:32:19,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-21 21:32:19,634 INFO L175 Difference]: Start difference. First operand has 203 places, 681 transitions, 13076 flow. Second operand 7 states and 131 transitions. [2024-06-21 21:32:19,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 723 transitions, 15008 flow [2024-06-21 21:32:20,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 723 transitions, 14397 flow, removed 137 selfloop flow, removed 5 redundant places. [2024-06-21 21:32:20,101 INFO L231 Difference]: Finished difference. Result has 205 places, 681 transitions, 12828 flow [2024-06-21 21:32:20,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12465, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12828, PETRI_PLACES=205, PETRI_TRANSITIONS=681} [2024-06-21 21:32:20,102 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-21 21:32:20,102 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 681 transitions, 12828 flow [2024-06-21 21:32:20,103 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 21:32:20,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:20,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:20,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:32:20,103 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 21:32:20,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:20,103 INFO L85 PathProgramCache]: Analyzing trace with hash -829524560, now seen corresponding path program 10 times [2024-06-21 21:32:20,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:20,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992427468] [2024-06-21 21:32:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:20,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:20,685 INFO 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 21:32:20,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:20,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992427468] [2024-06-21 21:32:20,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992427468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:20,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:20,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:20,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863940494] [2024-06-21 21:32:20,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:20,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:20,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:20,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:20,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:20,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:32:20,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 681 transitions, 12828 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 21:32:20,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:20,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:32:20,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:22,115 INFO L124 PetriNetUnfolderBase]: 4216/6189 cut-off events. [2024-06-21 21:32:22,115 INFO L125 PetriNetUnfolderBase]: For 170873/170877 co-relation queries the response was YES. [2024-06-21 21:32:22,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54419 conditions, 6189 events. 4216/6189 cut-off events. For 170873/170877 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 32371 event pairs, 1309 based on Foata normal form. 14/6203 useless extension candidates. Maximal degree in co-relation 54324. Up to 6007 conditions per place. [2024-06-21 21:32:22,187 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 671 selfloop transitions, 39 changer transitions 0/713 dead transitions. [2024-06-21 21:32:22,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 713 transitions, 14590 flow [2024-06-21 21:32:22,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:32:22,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:32:22,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 21:32:22,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 21:32:22,188 INFO L175 Difference]: Start difference. First operand has 205 places, 681 transitions, 12828 flow. Second operand 7 states and 113 transitions. [2024-06-21 21:32:22,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 713 transitions, 14590 flow [2024-06-21 21:32:22,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 713 transitions, 14366 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 21:32:22,685 INFO L231 Difference]: Finished difference. Result has 208 places, 689 transitions, 12924 flow [2024-06-21 21:32:22,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12609, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12924, PETRI_PLACES=208, PETRI_TRANSITIONS=689} [2024-06-21 21:32:22,685 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2024-06-21 21:32:22,685 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 689 transitions, 12924 flow [2024-06-21 21:32:22,686 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 21:32:22,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:22,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:22,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:32:22,686 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:22,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:22,686 INFO L85 PathProgramCache]: Analyzing trace with hash -829257433, now seen corresponding path program 1 times [2024-06-21 21:32:22,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:22,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61131719] [2024-06-21 21:32:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:22,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:23,399 INFO 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 21:32:23,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:23,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61131719] [2024-06-21 21:32:23,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61131719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:23,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:23,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:23,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426950025] [2024-06-21 21:32:23,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:23,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:23,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:23,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:23,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:23,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:32:23,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 689 transitions, 12924 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 21:32:23,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:23,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:32:23,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:24,665 INFO L124 PetriNetUnfolderBase]: 4208/6181 cut-off events. [2024-06-21 21:32:24,665 INFO L125 PetriNetUnfolderBase]: For 167546/167550 co-relation queries the response was YES. [2024-06-21 21:32:24,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53449 conditions, 6181 events. 4208/6181 cut-off events. For 167546/167550 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 32403 event pairs, 1294 based on Foata normal form. 7/6188 useless extension candidates. Maximal degree in co-relation 53353. Up to 6035 conditions per place. [2024-06-21 21:32:24,732 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 674 selfloop transitions, 29 changer transitions 0/706 dead transitions. [2024-06-21 21:32:24,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 706 transitions, 14419 flow [2024-06-21 21:32:24,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:32:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:32:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-21 21:32:24,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 21:32:24,734 INFO L175 Difference]: Start difference. First operand has 208 places, 689 transitions, 12924 flow. Second operand 6 states and 98 transitions. [2024-06-21 21:32:24,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 706 transitions, 14419 flow [2024-06-21 21:32:25,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 706 transitions, 14234 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-21 21:32:25,165 INFO L231 Difference]: Finished difference. Result has 210 places, 689 transitions, 12819 flow [2024-06-21 21:32:25,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12739, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12819, PETRI_PLACES=210, PETRI_TRANSITIONS=689} [2024-06-21 21:32:25,166 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-21 21:32:25,166 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 689 transitions, 12819 flow [2024-06-21 21:32:25,166 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 21:32:25,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:25,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:25,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:32:25,167 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 21:32:25,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:25,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1888945963, now seen corresponding path program 1 times [2024-06-21 21:32:25,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:25,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585288659] [2024-06-21 21:32:25,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:25,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:25,646 INFO 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 21:32:25,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:25,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585288659] [2024-06-21 21:32:25,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585288659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:25,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:25,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:25,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638884007] [2024-06-21 21:32:25,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:25,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:25,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:25,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:25,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:25,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 21:32:25,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 689 transitions, 12819 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 21:32:25,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:25,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 21:32:25,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:27,224 INFO L124 PetriNetUnfolderBase]: 4249/6377 cut-off events. [2024-06-21 21:32:27,225 INFO L125 PetriNetUnfolderBase]: For 196583/196813 co-relation queries the response was YES. [2024-06-21 21:32:27,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54852 conditions, 6377 events. 4249/6377 cut-off events. For 196583/196813 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 35438 event pairs, 798 based on Foata normal form. 96/6423 useless extension candidates. Maximal degree in co-relation 54755. Up to 3226 conditions per place. [2024-06-21 21:32:27,300 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 271 selfloop transitions, 384 changer transitions 0/749 dead transitions. [2024-06-21 21:32:27,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 749 transitions, 14764 flow [2024-06-21 21:32:27,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:32:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:32:27,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 21:32:27,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-21 21:32:27,302 INFO L175 Difference]: Start difference. First operand has 210 places, 689 transitions, 12819 flow. Second operand 9 states and 176 transitions. [2024-06-21 21:32:27,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 749 transitions, 14764 flow [2024-06-21 21:32:27,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 749 transitions, 14712 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:32:27,743 INFO L231 Difference]: Finished difference. Result has 217 places, 695 transitions, 13804 flow [2024-06-21 21:32:27,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12767, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13804, PETRI_PLACES=217, PETRI_TRANSITIONS=695} [2024-06-21 21:32:27,744 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 176 predicate places. [2024-06-21 21:32:27,744 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 695 transitions, 13804 flow [2024-06-21 21:32:27,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 21:32:27,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:27,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:27,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:32:27,745 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 21:32:27,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:27,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1103055795, now seen corresponding path program 2 times [2024-06-21 21:32:27,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:27,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143450307] [2024-06-21 21:32:27,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:27,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:28,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:28,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143450307] [2024-06-21 21:32:28,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143450307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:28,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:28,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:28,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160276639] [2024-06-21 21:32:28,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:28,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:28,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:28,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:28,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:28,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 21:32:28,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 695 transitions, 13804 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 21:32:28,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:28,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 21:32:28,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:30,024 INFO L124 PetriNetUnfolderBase]: 4668/7065 cut-off events. [2024-06-21 21:32:30,024 INFO L125 PetriNetUnfolderBase]: For 253923/254207 co-relation queries the response was YES. [2024-06-21 21:32:30,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62302 conditions, 7065 events. 4668/7065 cut-off events. For 253923/254207 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 40810 event pairs, 1099 based on Foata normal form. 102/7089 useless extension candidates. Maximal degree in co-relation 62202. Up to 4241 conditions per place. [2024-06-21 21:32:30,113 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 276 selfloop transitions, 394 changer transitions 0/764 dead transitions. [2024-06-21 21:32:30,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 764 transitions, 16043 flow [2024-06-21 21:32:30,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:32:30,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:32:30,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 21:32:30,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-21 21:32:30,114 INFO L175 Difference]: Start difference. First operand has 217 places, 695 transitions, 13804 flow. Second operand 9 states and 176 transitions. [2024-06-21 21:32:30,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 764 transitions, 16043 flow [2024-06-21 21:32:30,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 764 transitions, 15569 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 21:32:30,781 INFO L231 Difference]: Finished difference. Result has 222 places, 704 transitions, 14400 flow [2024-06-21 21:32:30,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13368, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14400, PETRI_PLACES=222, PETRI_TRANSITIONS=704} [2024-06-21 21:32:30,782 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-21 21:32:30,782 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 704 transitions, 14400 flow [2024-06-21 21:32:30,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 21:32:30,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:30,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:30,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:32:30,782 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 21:32:30,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:30,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1072522035, now seen corresponding path program 3 times [2024-06-21 21:32:30,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:30,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102255722] [2024-06-21 21:32:30,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:30,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:31,369 INFO 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 21:32:31,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:31,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102255722] [2024-06-21 21:32:31,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102255722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:31,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:31,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:31,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560852401] [2024-06-21 21:32:31,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:31,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:31,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:31,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:31,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:31,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 21:32:31,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 704 transitions, 14400 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 21:32:31,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:31,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 21:32:31,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:33,266 INFO L124 PetriNetUnfolderBase]: 4653/7055 cut-off events. [2024-06-21 21:32:33,266 INFO L125 PetriNetUnfolderBase]: For 255274/255500 co-relation queries the response was YES. [2024-06-21 21:32:33,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62865 conditions, 7055 events. 4653/7055 cut-off events. For 255274/255500 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 40815 event pairs, 1088 based on Foata normal form. 104/7092 useless extension candidates. Maximal degree in co-relation 62763. Up to 4784 conditions per place. [2024-06-21 21:32:33,338 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 268 selfloop transitions, 396 changer transitions 0/758 dead transitions. [2024-06-21 21:32:33,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 758 transitions, 16296 flow [2024-06-21 21:32:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:32:33,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:32:33,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 21:32:33,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2024-06-21 21:32:33,339 INFO L175 Difference]: Start difference. First operand has 222 places, 704 transitions, 14400 flow. Second operand 9 states and 173 transitions. [2024-06-21 21:32:33,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 758 transitions, 16296 flow [2024-06-21 21:32:33,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 758 transitions, 15813 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 21:32:33,979 INFO L231 Difference]: Finished difference. Result has 227 places, 705 transitions, 14825 flow [2024-06-21 21:32:33,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13917, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14825, PETRI_PLACES=227, PETRI_TRANSITIONS=705} [2024-06-21 21:32:33,980 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-21 21:32:33,980 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 705 transitions, 14825 flow [2024-06-21 21:32:33,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 21:32:33,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:33,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:33,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:32:33,981 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 21:32:33,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:33,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1993434607, now seen corresponding path program 4 times [2024-06-21 21:32:33,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:33,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028615685] [2024-06-21 21:32:33,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:33,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:34,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:34,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028615685] [2024-06-21 21:32:34,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028615685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:34,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:34,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:32:34,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831907901] [2024-06-21 21:32:34,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:34,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:32:34,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:34,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:32:34,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:32:34,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:32:34,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 705 transitions, 14825 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 21:32:34,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:34,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:32:34,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:36,892 INFO L124 PetriNetUnfolderBase]: 5417/8147 cut-off events. [2024-06-21 21:32:36,892 INFO L125 PetriNetUnfolderBase]: For 281991/282004 co-relation queries the response was YES. [2024-06-21 21:32:36,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73409 conditions, 8147 events. 5417/8147 cut-off events. For 281991/282004 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 47162 event pairs, 1304 based on Foata normal form. 16/8163 useless extension candidates. Maximal degree in co-relation 73304. Up to 6375 conditions per place. [2024-06-21 21:32:36,991 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 493 selfloop transitions, 280 changer transitions 0/776 dead transitions. [2024-06-21 21:32:36,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 776 transitions, 17465 flow [2024-06-21 21:32:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:32:36,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:32:36,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 21:32:36,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-06-21 21:32:36,993 INFO L175 Difference]: Start difference. First operand has 227 places, 705 transitions, 14825 flow. Second operand 10 states and 188 transitions. [2024-06-21 21:32:36,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 776 transitions, 17465 flow [2024-06-21 21:32:37,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 776 transitions, 16795 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 21:32:37,811 INFO L231 Difference]: Finished difference. Result has 232 places, 721 transitions, 15098 flow [2024-06-21 21:32:37,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14170, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15098, PETRI_PLACES=232, PETRI_TRANSITIONS=721} [2024-06-21 21:32:37,812 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-21 21:32:37,812 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 721 transitions, 15098 flow [2024-06-21 21:32:37,813 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 21:32:37,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:37,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:37,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:32:37,813 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 21:32:37,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:37,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1993495057, now seen corresponding path program 5 times [2024-06-21 21:32:37,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:37,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308327950] [2024-06-21 21:32:37,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:37,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:38,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:38,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308327950] [2024-06-21 21:32:38,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308327950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:38,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:38,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:32:38,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778620745] [2024-06-21 21:32:38,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:38,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:32:38,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:38,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:32:38,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:32:38,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:32:38,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 721 transitions, 15098 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 21:32:38,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:38,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:32:38,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:40,662 INFO L124 PetriNetUnfolderBase]: 5467/8229 cut-off events. [2024-06-21 21:32:40,662 INFO L125 PetriNetUnfolderBase]: For 298283/298296 co-relation queries the response was YES. [2024-06-21 21:32:40,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74744 conditions, 8229 events. 5467/8229 cut-off events. For 298283/298296 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 47867 event pairs, 1356 based on Foata normal form. 18/8247 useless extension candidates. Maximal degree in co-relation 74637. Up to 7099 conditions per place. [2024-06-21 21:32:40,908 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 497 selfloop transitions, 273 changer transitions 0/773 dead transitions. [2024-06-21 21:32:40,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 773 transitions, 17418 flow [2024-06-21 21:32:40,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:32:40,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:32:40,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-21 21:32:40,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:32:40,909 INFO L175 Difference]: Start difference. First operand has 232 places, 721 transitions, 15098 flow. Second operand 10 states and 180 transitions. [2024-06-21 21:32:40,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 773 transitions, 17418 flow [2024-06-21 21:32:41,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 773 transitions, 17038 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 21:32:41,643 INFO L231 Difference]: Finished difference. Result has 236 places, 726 transitions, 15421 flow [2024-06-21 21:32:41,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14720, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15421, PETRI_PLACES=236, PETRI_TRANSITIONS=726} [2024-06-21 21:32:41,644 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-21 21:32:41,644 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 726 transitions, 15421 flow [2024-06-21 21:32:41,644 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 21:32:41,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:41,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:41,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:32:41,644 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 21:32:41,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:41,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1996291567, now seen corresponding path program 6 times [2024-06-21 21:32:41,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:41,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965292129] [2024-06-21 21:32:41,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:41,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:42,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:42,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965292129] [2024-06-21 21:32:42,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965292129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:42,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:42,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:32:42,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166685520] [2024-06-21 21:32:42,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:42,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:32:42,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:42,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:32:42,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:32:42,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:32:42,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 726 transitions, 15421 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 21:32:42,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:42,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:32:42,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:44,907 INFO L124 PetriNetUnfolderBase]: 5558/8371 cut-off events. [2024-06-21 21:32:44,908 INFO L125 PetriNetUnfolderBase]: For 319784/319799 co-relation queries the response was YES. [2024-06-21 21:32:44,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76918 conditions, 8371 events. 5558/8371 cut-off events. For 319784/319799 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 48967 event pairs, 1478 based on Foata normal form. 36/8407 useless extension candidates. Maximal degree in co-relation 76809. Up to 7581 conditions per place. [2024-06-21 21:32:45,012 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 619 selfloop transitions, 161 changer transitions 0/783 dead transitions. [2024-06-21 21:32:45,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 783 transitions, 17580 flow [2024-06-21 21:32:45,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:32:45,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:32:45,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 21:32:45,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-21 21:32:45,014 INFO L175 Difference]: Start difference. First operand has 236 places, 726 transitions, 15421 flow. Second operand 10 states and 185 transitions. [2024-06-21 21:32:45,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 783 transitions, 17580 flow [2024-06-21 21:32:45,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 783 transitions, 17061 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 21:32:45,994 INFO L231 Difference]: Finished difference. Result has 239 places, 733 transitions, 15442 flow [2024-06-21 21:32:45,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14904, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15442, PETRI_PLACES=239, PETRI_TRANSITIONS=733} [2024-06-21 21:32:45,995 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-21 21:32:45,995 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 733 transitions, 15442 flow [2024-06-21 21:32:45,995 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 21:32:45,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:45,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:45,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:32:45,996 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 21:32:45,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:45,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1996296341, now seen corresponding path program 1 times [2024-06-21 21:32:45,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:45,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190902598] [2024-06-21 21:32:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:45,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:46,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:46,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190902598] [2024-06-21 21:32:46,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190902598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:46,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:46,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:32:46,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484323116] [2024-06-21 21:32:46,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:46,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:32:46,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:46,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:32:46,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:32:46,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:32:46,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 733 transitions, 15442 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 21:32:46,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:46,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:32:46,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:49,161 INFO L124 PetriNetUnfolderBase]: 5536/8364 cut-off events. [2024-06-21 21:32:49,161 INFO L125 PetriNetUnfolderBase]: For 319178/319192 co-relation queries the response was YES. [2024-06-21 21:32:49,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76631 conditions, 8364 events. 5536/8364 cut-off events. For 319178/319192 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 49054 event pairs, 1238 based on Foata normal form. 16/8380 useless extension candidates. Maximal degree in co-relation 76521. Up to 6478 conditions per place. [2024-06-21 21:32:49,260 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 380 selfloop transitions, 402 changer transitions 0/785 dead transitions. [2024-06-21 21:32:49,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 785 transitions, 17687 flow [2024-06-21 21:32:49,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:32:49,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:32:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 21:32:49,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-06-21 21:32:49,262 INFO L175 Difference]: Start difference. First operand has 239 places, 733 transitions, 15442 flow. Second operand 10 states and 182 transitions. [2024-06-21 21:32:49,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 785 transitions, 17687 flow [2024-06-21 21:32:50,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 785 transitions, 17290 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-21 21:32:50,162 INFO L231 Difference]: Finished difference. Result has 241 places, 733 transitions, 15868 flow [2024-06-21 21:32:50,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15045, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15868, PETRI_PLACES=241, PETRI_TRANSITIONS=733} [2024-06-21 21:32:50,163 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-21 21:32:50,163 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 733 transitions, 15868 flow [2024-06-21 21:32:50,163 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 21:32:50,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:50,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:50,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:32:50,164 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 21:32:50,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:50,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1331840329, now seen corresponding path program 2 times [2024-06-21 21:32:50,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:50,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354153639] [2024-06-21 21:32:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:50,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:50,940 INFO 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 21:32:50,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:50,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354153639] [2024-06-21 21:32:50,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354153639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:50,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:50,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:32:50,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148025025] [2024-06-21 21:32:50,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:50,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:32:50,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:50,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:32:50,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:32:51,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:32:51,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 733 transitions, 15868 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 21:32:51,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:51,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:32:51,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:53,361 INFO L124 PetriNetUnfolderBase]: 5586/8415 cut-off events. [2024-06-21 21:32:53,361 INFO L125 PetriNetUnfolderBase]: For 342346/342351 co-relation queries the response was YES. [2024-06-21 21:32:53,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78633 conditions, 8415 events. 5586/8415 cut-off events. For 342346/342351 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 49125 event pairs, 1629 based on Foata normal form. 10/8425 useless extension candidates. Maximal degree in co-relation 78522. Up to 7820 conditions per place. [2024-06-21 21:32:53,466 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 654 selfloop transitions, 136 changer transitions 0/793 dead transitions. [2024-06-21 21:32:53,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 793 transitions, 18168 flow [2024-06-21 21:32:53,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:32:53,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:32:53,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 202 transitions. [2024-06-21 21:32:53,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-21 21:32:53,467 INFO L175 Difference]: Start difference. First operand has 241 places, 733 transitions, 15868 flow. Second operand 12 states and 202 transitions. [2024-06-21 21:32:53,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 793 transitions, 18168 flow [2024-06-21 21:32:54,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 793 transitions, 17308 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 21:32:54,579 INFO L231 Difference]: Finished difference. Result has 245 places, 742 transitions, 15596 flow [2024-06-21 21:32:54,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15026, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15596, PETRI_PLACES=245, PETRI_TRANSITIONS=742} [2024-06-21 21:32:54,580 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 204 predicate places. [2024-06-21 21:32:54,580 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 742 transitions, 15596 flow [2024-06-21 21:32:54,580 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 21:32:54,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:54,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:54,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:32:54,580 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 21:32:54,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:54,581 INFO L85 PathProgramCache]: Analyzing trace with hash 389675929, now seen corresponding path program 3 times [2024-06-21 21:32:54,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:54,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129716060] [2024-06-21 21:32:54,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:54,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:55,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:55,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129716060] [2024-06-21 21:32:55,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129716060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:55,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:55,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:32:55,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324745002] [2024-06-21 21:32:55,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:55,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:32:55,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:55,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:32:55,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:32:55,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:32:55,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 742 transitions, 15596 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 21:32:55,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:55,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:32:55,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:57,683 INFO L124 PetriNetUnfolderBase]: 5564/8389 cut-off events. [2024-06-21 21:32:57,683 INFO L125 PetriNetUnfolderBase]: For 340649/340654 co-relation queries the response was YES. [2024-06-21 21:32:57,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77261 conditions, 8389 events. 5564/8389 cut-off events. For 340649/340654 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 49125 event pairs, 1629 based on Foata normal form. 10/8399 useless extension candidates. Maximal degree in co-relation 77149. Up to 7802 conditions per place. [2024-06-21 21:32:57,786 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 645 selfloop transitions, 134 changer transitions 0/782 dead transitions. [2024-06-21 21:32:57,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 782 transitions, 17377 flow [2024-06-21 21:32:57,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:32:57,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:32:57,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 21:32:57,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-21 21:32:57,787 INFO L175 Difference]: Start difference. First operand has 245 places, 742 transitions, 15596 flow. Second operand 10 states and 172 transitions. [2024-06-21 21:32:57,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 782 transitions, 17377 flow [2024-06-21 21:32:58,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 782 transitions, 16995 flow, removed 58 selfloop flow, removed 9 redundant places. [2024-06-21 21:32:58,801 INFO L231 Difference]: Finished difference. Result has 246 places, 742 transitions, 15496 flow [2024-06-21 21:32:58,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15214, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15496, PETRI_PLACES=246, PETRI_TRANSITIONS=742} [2024-06-21 21:32:58,802 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 205 predicate places. [2024-06-21 21:32:58,802 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 742 transitions, 15496 flow [2024-06-21 21:32:58,802 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 21:32:58,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:58,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:58,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:32:58,802 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 21:32:58,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:58,803 INFO L85 PathProgramCache]: Analyzing trace with hash 389671155, now seen corresponding path program 7 times [2024-06-21 21:32:58,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:58,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110333436] [2024-06-21 21:32:58,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:58,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:59,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:59,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110333436] [2024-06-21 21:32:59,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110333436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:59,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:59,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:32:59,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112285261] [2024-06-21 21:32:59,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:59,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:32:59,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:59,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:32:59,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:32:59,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:32:59,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 742 transitions, 15496 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 21:32:59,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:59,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:32:59,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:02,248 INFO L124 PetriNetUnfolderBase]: 5614/8466 cut-off events. [2024-06-21 21:33:02,248 INFO L125 PetriNetUnfolderBase]: For 356952/356959 co-relation queries the response was YES. [2024-06-21 21:33:02,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77707 conditions, 8466 events. 5614/8466 cut-off events. For 356952/356959 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 49665 event pairs, 1684 based on Foata normal form. 28/8494 useless extension candidates. Maximal degree in co-relation 77594. Up to 8003 conditions per place. [2024-06-21 21:33:02,354 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 713 selfloop transitions, 81 changer transitions 0/797 dead transitions. [2024-06-21 21:33:02,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 797 transitions, 17656 flow [2024-06-21 21:33:02,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:33:02,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:33:02,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 21:33:02,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525 [2024-06-21 21:33:02,356 INFO L175 Difference]: Start difference. First operand has 246 places, 742 transitions, 15496 flow. Second operand 10 states and 181 transitions. [2024-06-21 21:33:02,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 797 transitions, 17656 flow [2024-06-21 21:33:03,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 797 transitions, 17409 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 21:33:03,404 INFO L231 Difference]: Finished difference. Result has 249 places, 748 transitions, 15605 flow [2024-06-21 21:33:03,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15249, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15605, PETRI_PLACES=249, PETRI_TRANSITIONS=748} [2024-06-21 21:33:03,405 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-21 21:33:03,405 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 748 transitions, 15605 flow [2024-06-21 21:33:03,405 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 21:33:03,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:03,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:03,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:33:03,405 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 21:33:03,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:03,405 INFO L85 PathProgramCache]: Analyzing trace with hash 389855853, now seen corresponding path program 1 times [2024-06-21 21:33:03,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:03,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728171751] [2024-06-21 21:33:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:03,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:04,192 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 21:33:04,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:04,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728171751] [2024-06-21 21:33:04,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728171751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:04,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:04,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:04,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070116292] [2024-06-21 21:33:04,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:04,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:04,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:04,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:04,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:04,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:04,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 748 transitions, 15605 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 21:33:04,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:04,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:04,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:06,349 INFO L124 PetriNetUnfolderBase]: 5631/8488 cut-off events. [2024-06-21 21:33:06,349 INFO L125 PetriNetUnfolderBase]: For 360758/360763 co-relation queries the response was YES. [2024-06-21 21:33:06,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78470 conditions, 8488 events. 5631/8488 cut-off events. For 360758/360763 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 49674 event pairs, 1646 based on Foata normal form. 6/8494 useless extension candidates. Maximal degree in co-relation 78356. Up to 8143 conditions per place. [2024-06-21 21:33:06,462 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 698 selfloop transitions, 81 changer transitions 0/782 dead transitions. [2024-06-21 21:33:06,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 782 transitions, 17351 flow [2024-06-21 21:33:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:33:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:33:06,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 21:33:06,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-21 21:33:06,463 INFO L175 Difference]: Start difference. First operand has 249 places, 748 transitions, 15605 flow. Second operand 9 states and 151 transitions. [2024-06-21 21:33:06,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 782 transitions, 17351 flow [2024-06-21 21:33:07,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 782 transitions, 17172 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 21:33:07,523 INFO L231 Difference]: Finished difference. Result has 251 places, 750 transitions, 15634 flow [2024-06-21 21:33:07,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15426, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15634, PETRI_PLACES=251, PETRI_TRANSITIONS=750} [2024-06-21 21:33:07,524 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 210 predicate places. [2024-06-21 21:33:07,524 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 750 transitions, 15634 flow [2024-06-21 21:33:07,525 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 21:33:07,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:07,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:07,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:33:07,525 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:07,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:07,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1670274089, now seen corresponding path program 8 times [2024-06-21 21:33:07,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:07,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276734010] [2024-06-21 21:33:07,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:07,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:08,348 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 21:33:08,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:08,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276734010] [2024-06-21 21:33:08,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276734010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:08,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:08,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:08,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262663268] [2024-06-21 21:33:08,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:08,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:08,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:08,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:08,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:08,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:08,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 750 transitions, 15634 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 21:33:08,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:08,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:08,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:10,612 INFO L124 PetriNetUnfolderBase]: 6038/9150 cut-off events. [2024-06-21 21:33:10,612 INFO L125 PetriNetUnfolderBase]: For 409301/409323 co-relation queries the response was YES. [2024-06-21 21:33:10,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84387 conditions, 9150 events. 6038/9150 cut-off events. For 409301/409323 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 54731 event pairs, 1056 based on Foata normal form. 22/9172 useless extension candidates. Maximal degree in co-relation 84272. Up to 5852 conditions per place. [2024-06-21 21:33:10,739 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 346 selfloop transitions, 468 changer transitions 0/817 dead transitions. [2024-06-21 21:33:10,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 817 transitions, 18357 flow [2024-06-21 21:33:10,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:33:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:33:10,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 21:33:10,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-21 21:33:10,741 INFO L175 Difference]: Start difference. First operand has 251 places, 750 transitions, 15634 flow. Second operand 9 states and 169 transitions. [2024-06-21 21:33:10,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 817 transitions, 18357 flow [2024-06-21 21:33:11,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 817 transitions, 18205 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:12,169 INFO L231 Difference]: Finished difference. Result has 255 places, 763 transitions, 16902 flow [2024-06-21 21:33:12,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15482, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=458, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16902, PETRI_PLACES=255, PETRI_TRANSITIONS=763} [2024-06-21 21:33:12,171 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 214 predicate places. [2024-06-21 21:33:12,172 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 763 transitions, 16902 flow [2024-06-21 21:33:12,172 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 21:33:12,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:12,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:12,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:33:12,172 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:12,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:12,173 INFO L85 PathProgramCache]: Analyzing trace with hash -832322855, now seen corresponding path program 9 times [2024-06-21 21:33:12,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:12,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681212861] [2024-06-21 21:33:12,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:12,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:13,008 INFO 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 21:33:13,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:13,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681212861] [2024-06-21 21:33:13,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681212861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:13,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:13,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:13,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979986314] [2024-06-21 21:33:13,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:13,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:13,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:13,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:13,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:13,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:13,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 763 transitions, 16902 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 21:33:13,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:13,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:13,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:15,505 INFO L124 PetriNetUnfolderBase]: 6105/9267 cut-off events. [2024-06-21 21:33:15,505 INFO L125 PetriNetUnfolderBase]: For 448505/448529 co-relation queries the response was YES. [2024-06-21 21:33:15,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88717 conditions, 9267 events. 6105/9267 cut-off events. For 448505/448529 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 55960 event pairs, 1475 based on Foata normal form. 26/9293 useless extension candidates. Maximal degree in co-relation 88600. Up to 7520 conditions per place. [2024-06-21 21:33:15,601 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 376 selfloop transitions, 437 changer transitions 0/816 dead transitions. [2024-06-21 21:33:15,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 816 transitions, 19299 flow [2024-06-21 21:33:15,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:33:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:33:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:33:15,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:33:15,602 INFO L175 Difference]: Start difference. First operand has 255 places, 763 transitions, 16902 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:33:15,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 816 transitions, 19299 flow [2024-06-21 21:33:16,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 816 transitions, 18870 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-21 21:33:16,792 INFO L231 Difference]: Finished difference. Result has 260 places, 769 transitions, 17565 flow [2024-06-21 21:33:16,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16483, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=431, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17565, PETRI_PLACES=260, PETRI_TRANSITIONS=769} [2024-06-21 21:33:16,792 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-21 21:33:16,792 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 769 transitions, 17565 flow [2024-06-21 21:33:16,793 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 21:33:16,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:16,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:16,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:33:16,793 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:16,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:16,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1077047185, now seen corresponding path program 10 times [2024-06-21 21:33:16,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:16,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074027799] [2024-06-21 21:33:16,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:16,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:17,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:17,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074027799] [2024-06-21 21:33:17,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074027799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:17,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:17,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:17,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366142367] [2024-06-21 21:33:17,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:17,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:17,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:17,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:17,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:17,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:17,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 769 transitions, 17565 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 21:33:17,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:17,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:17,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:20,189 INFO L124 PetriNetUnfolderBase]: 6474/9882 cut-off events. [2024-06-21 21:33:20,189 INFO L125 PetriNetUnfolderBase]: For 533120/533133 co-relation queries the response was YES. [2024-06-21 21:33:20,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93913 conditions, 9882 events. 6474/9882 cut-off events. For 533120/533133 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 60782 event pairs, 1663 based on Foata normal form. 104/9986 useless extension candidates. Maximal degree in co-relation 93794. Up to 7887 conditions per place. [2024-06-21 21:33:20,306 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 518 selfloop transitions, 309 changer transitions 0/830 dead transitions. [2024-06-21 21:33:20,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 830 transitions, 20016 flow [2024-06-21 21:33:20,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:33:20,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:33:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 21:33:20,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-21 21:33:20,307 INFO L175 Difference]: Start difference. First operand has 260 places, 769 transitions, 17565 flow. Second operand 9 states and 164 transitions. [2024-06-21 21:33:20,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 830 transitions, 20016 flow [2024-06-21 21:33:21,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 830 transitions, 19038 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-21 21:33:21,720 INFO L231 Difference]: Finished difference. Result has 263 places, 776 transitions, 17576 flow [2024-06-21 21:33:21,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16587, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17576, PETRI_PLACES=263, PETRI_TRANSITIONS=776} [2024-06-21 21:33:21,720 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 222 predicate places. [2024-06-21 21:33:21,721 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 776 transitions, 17576 flow [2024-06-21 21:33:21,721 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 21:33:21,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:21,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:21,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:33:21,721 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 21:33:21,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:21,722 INFO L85 PathProgramCache]: Analyzing trace with hash -714230401, now seen corresponding path program 4 times [2024-06-21 21:33:21,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:21,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665269520] [2024-06-21 21:33:21,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:21,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:22,469 INFO 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 21:33:22,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:22,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665269520] [2024-06-21 21:33:22,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665269520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:22,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:22,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:22,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685229603] [2024-06-21 21:33:22,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:22,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:22,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:22,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:22,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:22,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:22,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 776 transitions, 17576 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 21:33:22,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:22,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:22,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:25,004 INFO L124 PetriNetUnfolderBase]: 6449/9870 cut-off events. [2024-06-21 21:33:25,004 INFO L125 PetriNetUnfolderBase]: For 488478/488483 co-relation queries the response was YES. [2024-06-21 21:33:25,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93734 conditions, 9870 events. 6449/9870 cut-off events. For 488478/488483 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 61207 event pairs, 1970 based on Foata normal form. 11/9881 useless extension candidates. Maximal degree in co-relation 93613. Up to 9068 conditions per place. [2024-06-21 21:33:25,142 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 633 selfloop transitions, 181 changer transitions 0/817 dead transitions. [2024-06-21 21:33:25,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 817 transitions, 19530 flow [2024-06-21 21:33:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:25,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 21:33:25,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 21:33:25,143 INFO L175 Difference]: Start difference. First operand has 263 places, 776 transitions, 17576 flow. Second operand 8 states and 138 transitions. [2024-06-21 21:33:25,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 817 transitions, 19530 flow [2024-06-21 21:33:26,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 817 transitions, 18680 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-21 21:33:26,953 INFO L231 Difference]: Finished difference. Result has 264 places, 776 transitions, 17160 flow [2024-06-21 21:33:26,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16726, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17160, PETRI_PLACES=264, PETRI_TRANSITIONS=776} [2024-06-21 21:33:26,954 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 223 predicate places. [2024-06-21 21:33:26,954 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 776 transitions, 17160 flow [2024-06-21 21:33:26,954 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 21:33:26,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:26,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:26,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:33:26,954 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 21:33:26,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:26,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1552125959, now seen corresponding path program 11 times [2024-06-21 21:33:26,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:26,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918342055] [2024-06-21 21:33:26,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:26,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:27,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:27,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918342055] [2024-06-21 21:33:27,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918342055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:27,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:27,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:27,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969842541] [2024-06-21 21:33:27,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:27,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:27,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:27,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:27,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:28,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:28,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 776 transitions, 17160 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 21:33:28,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:28,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:28,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:30,689 INFO L124 PetriNetUnfolderBase]: 6684/10215 cut-off events. [2024-06-21 21:33:30,690 INFO L125 PetriNetUnfolderBase]: For 501671/501678 co-relation queries the response was YES. [2024-06-21 21:33:30,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95399 conditions, 10215 events. 6684/10215 cut-off events. For 501671/501678 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 63286 event pairs, 2064 based on Foata normal form. 44/10259 useless extension candidates. Maximal degree in co-relation 95278. Up to 9316 conditions per place. [2024-06-21 21:33:30,825 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 705 selfloop transitions, 150 changer transitions 0/858 dead transitions. [2024-06-21 21:33:30,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 858 transitions, 19983 flow [2024-06-21 21:33:30,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:33:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:33:30,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 21:33:30,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-21 21:33:30,828 INFO L175 Difference]: Start difference. First operand has 264 places, 776 transitions, 17160 flow. Second operand 9 states and 166 transitions. [2024-06-21 21:33:30,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 858 transitions, 19983 flow [2024-06-21 21:33:32,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 858 transitions, 19360 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 21:33:32,289 INFO L231 Difference]: Finished difference. Result has 268 places, 808 transitions, 17721 flow [2024-06-21 21:33:32,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16541, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17721, PETRI_PLACES=268, PETRI_TRANSITIONS=808} [2024-06-21 21:33:32,290 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 227 predicate places. [2024-06-21 21:33:32,290 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 808 transitions, 17721 flow [2024-06-21 21:33:32,290 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 21:33:32,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:32,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:32,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:33:32,291 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 21:33:32,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:32,291 INFO L85 PathProgramCache]: Analyzing trace with hash -714050477, now seen corresponding path program 2 times [2024-06-21 21:33:32,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:32,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712309200] [2024-06-21 21:33:32,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:32,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:33,151 INFO 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 21:33:33,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:33,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712309200] [2024-06-21 21:33:33,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712309200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:33,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:33,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:33,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445858157] [2024-06-21 21:33:33,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:33,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:33,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:33,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:33,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:33,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:33,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 808 transitions, 17721 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 21:33:33,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:33,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:33,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:36,157 INFO L124 PetriNetUnfolderBase]: 6701/10235 cut-off events. [2024-06-21 21:33:36,157 INFO L125 PetriNetUnfolderBase]: For 506389/506394 co-relation queries the response was YES. [2024-06-21 21:33:36,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97757 conditions, 10235 events. 6701/10235 cut-off events. For 506389/506394 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 63458 event pairs, 2099 based on Foata normal form. 6/10241 useless extension candidates. Maximal degree in co-relation 97633. Up to 9828 conditions per place. [2024-06-21 21:33:36,314 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 757 selfloop transitions, 82 changer transitions 0/842 dead transitions. [2024-06-21 21:33:36,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 842 transitions, 19633 flow [2024-06-21 21:33:36,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:36,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:36,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 21:33:36,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-21 21:33:36,317 INFO L175 Difference]: Start difference. First operand has 268 places, 808 transitions, 17721 flow. Second operand 8 states and 133 transitions. [2024-06-21 21:33:36,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 842 transitions, 19633 flow [2024-06-21 21:33:37,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 842 transitions, 19433 flow, removed 95 selfloop flow, removed 2 redundant places. [2024-06-21 21:33:37,728 INFO L231 Difference]: Finished difference. Result has 274 places, 810 transitions, 17742 flow [2024-06-21 21:33:37,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17521, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17742, PETRI_PLACES=274, PETRI_TRANSITIONS=810} [2024-06-21 21:33:37,729 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-21 21:33:37,729 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 810 transitions, 17742 flow [2024-06-21 21:33:37,729 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 21:33:37,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:37,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:37,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:33:37,729 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 21:33:37,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:37,729 INFO L85 PathProgramCache]: Analyzing trace with hash -173350479, now seen corresponding path program 3 times [2024-06-21 21:33:37,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:37,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690123897] [2024-06-21 21:33:37,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:37,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:38,629 INFO 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 21:33:38,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:38,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690123897] [2024-06-21 21:33:38,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690123897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:38,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:38,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:38,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950900110] [2024-06-21 21:33:38,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:38,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:38,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:38,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:38,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:38,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:38,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 810 transitions, 17742 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 21:33:38,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:38,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:38,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:41,237 INFO L124 PetriNetUnfolderBase]: 6718/10262 cut-off events. [2024-06-21 21:33:41,237 INFO L125 PetriNetUnfolderBase]: For 519584/519589 co-relation queries the response was YES. [2024-06-21 21:33:41,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98036 conditions, 10262 events. 6718/10262 cut-off events. For 519584/519589 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 63713 event pairs, 2041 based on Foata normal form. 6/10268 useless extension candidates. Maximal degree in co-relation 97910. Up to 9831 conditions per place. [2024-06-21 21:33:41,377 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 752 selfloop transitions, 84 changer transitions 0/839 dead transitions. [2024-06-21 21:33:41,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 839 transitions, 19610 flow [2024-06-21 21:33:41,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:33:41,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:33:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 21:33:41,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 21:33:41,378 INFO L175 Difference]: Start difference. First operand has 274 places, 810 transitions, 17742 flow. Second operand 7 states and 119 transitions. [2024-06-21 21:33:41,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 839 transitions, 19610 flow [2024-06-21 21:33:42,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 839 transitions, 19457 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 21:33:42,781 INFO L231 Difference]: Finished difference. Result has 277 places, 812 transitions, 17823 flow [2024-06-21 21:33:42,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17589, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17823, PETRI_PLACES=277, PETRI_TRANSITIONS=812} [2024-06-21 21:33:42,781 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-21 21:33:42,782 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 812 transitions, 17823 flow [2024-06-21 21:33:42,782 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 21:33:42,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:42,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:42,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:33:42,782 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 21:33:42,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:42,782 INFO L85 PathProgramCache]: Analyzing trace with hash -173535177, now seen corresponding path program 12 times [2024-06-21 21:33:42,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:42,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606025284] [2024-06-21 21:33:42,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:42,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:43,590 INFO 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 21:33:43,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:43,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606025284] [2024-06-21 21:33:43,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606025284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:43,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:43,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:43,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100965863] [2024-06-21 21:33:43,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:43,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:43,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:43,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:43,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:43,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:43,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 812 transitions, 17823 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 21:33:43,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:43,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:43,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:46,472 INFO L124 PetriNetUnfolderBase]: 6949/10682 cut-off events. [2024-06-21 21:33:46,472 INFO L125 PetriNetUnfolderBase]: For 592964/592988 co-relation queries the response was YES. [2024-06-21 21:33:46,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101205 conditions, 10682 events. 6949/10682 cut-off events. For 592964/592988 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 67412 event pairs, 1712 based on Foata normal form. 78/10760 useless extension candidates. Maximal degree in co-relation 101078. Up to 9404 conditions per place. [2024-06-21 21:33:46,617 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 668 selfloop transitions, 196 changer transitions 0/867 dead transitions. [2024-06-21 21:33:46,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 867 transitions, 20257 flow [2024-06-21 21:33:46,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:46,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:46,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 21:33:46,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-21 21:33:46,618 INFO L175 Difference]: Start difference. First operand has 277 places, 812 transitions, 17823 flow. Second operand 8 states and 151 transitions. [2024-06-21 21:33:46,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 867 transitions, 20257 flow [2024-06-21 21:33:48,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 867 transitions, 20106 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 21:33:48,123 INFO L231 Difference]: Finished difference. Result has 281 places, 816 transitions, 18274 flow [2024-06-21 21:33:48,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17676, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18274, PETRI_PLACES=281, PETRI_TRANSITIONS=816} [2024-06-21 21:33:48,124 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-21 21:33:48,124 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 816 transitions, 18274 flow [2024-06-21 21:33:48,124 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 21:33:48,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:48,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:48,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:33:48,125 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:48,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:48,125 INFO L85 PathProgramCache]: Analyzing trace with hash 54550671, now seen corresponding path program 4 times [2024-06-21 21:33:48,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:48,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403777537] [2024-06-21 21:33:48,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:48,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:48,905 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 21:33:48,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:48,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403777537] [2024-06-21 21:33:48,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403777537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:48,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:48,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:48,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196720255] [2024-06-21 21:33:48,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:48,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:48,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:48,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:48,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:48,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:48,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 816 transitions, 18274 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 21:33:48,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:48,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:48,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:51,839 INFO L124 PetriNetUnfolderBase]: 6966/10691 cut-off events. [2024-06-21 21:33:51,840 INFO L125 PetriNetUnfolderBase]: For 549779/549783 co-relation queries the response was YES. [2024-06-21 21:33:51,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102150 conditions, 10691 events. 6966/10691 cut-off events. For 549779/549783 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 67273 event pairs, 2708 based on Foata normal form. 8/10699 useless extension candidates. Maximal degree in co-relation 102022. Up to 10453 conditions per place. [2024-06-21 21:33:52,027 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 811 selfloop transitions, 26 changer transitions 0/840 dead transitions. [2024-06-21 21:33:52,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 840 transitions, 20112 flow [2024-06-21 21:33:52,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:33:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:33:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 21:33:52,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:33:52,028 INFO L175 Difference]: Start difference. First operand has 281 places, 816 transitions, 18274 flow. Second operand 7 states and 112 transitions. [2024-06-21 21:33:52,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 840 transitions, 20112 flow [2024-06-21 21:33:53,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 840 transitions, 19679 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 21:33:53,483 INFO L231 Difference]: Finished difference. Result has 281 places, 818 transitions, 17950 flow [2024-06-21 21:33:53,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17841, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=790, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17950, PETRI_PLACES=281, PETRI_TRANSITIONS=818} [2024-06-21 21:33:53,483 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-21 21:33:53,484 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 818 transitions, 17950 flow [2024-06-21 21:33:53,484 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 21:33:53,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:53,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:53,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 21:33:53,484 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:53,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash 63121551, now seen corresponding path program 5 times [2024-06-21 21:33:53,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:53,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9670399] [2024-06-21 21:33:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:53,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:54,199 INFO 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 21:33:54,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:54,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9670399] [2024-06-21 21:33:54,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9670399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:54,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:54,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:54,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816840765] [2024-06-21 21:33:54,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:54,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:54,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:54,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:54,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:54,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:33:54,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 818 transitions, 17950 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 21:33:54,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:54,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:33:54,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:57,252 INFO L124 PetriNetUnfolderBase]: 6983/10706 cut-off events. [2024-06-21 21:33:57,252 INFO L125 PetriNetUnfolderBase]: For 551805/551809 co-relation queries the response was YES. [2024-06-21 21:33:57,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101224 conditions, 10706 events. 6983/10706 cut-off events. For 551805/551809 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 67093 event pairs, 2660 based on Foata normal form. 8/10714 useless extension candidates. Maximal degree in co-relation 101095. Up to 10490 conditions per place. [2024-06-21 21:33:57,415 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 820 selfloop transitions, 17 changer transitions 0/840 dead transitions. [2024-06-21 21:33:57,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 840 transitions, 19770 flow [2024-06-21 21:33:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:33:57,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:33:57,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 21:33:57,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-21 21:33:57,416 INFO L175 Difference]: Start difference. First operand has 281 places, 818 transitions, 17950 flow. Second operand 7 states and 111 transitions. [2024-06-21 21:33:57,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 840 transitions, 19770 flow [2024-06-21 21:33:59,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 840 transitions, 19685 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 21:33:59,219 INFO L231 Difference]: Finished difference. Result has 283 places, 820 transitions, 17958 flow [2024-06-21 21:33:59,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17865, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17958, PETRI_PLACES=283, PETRI_TRANSITIONS=820} [2024-06-21 21:33:59,220 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-21 21:33:59,220 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 820 transitions, 17958 flow [2024-06-21 21:33:59,220 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 21:33:59,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:59,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:59,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 21:33:59,220 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:59,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:59,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1423878337, now seen corresponding path program 6 times [2024-06-21 21:33:59,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:59,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828622867] [2024-06-21 21:33:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:59,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:00,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:00,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828622867] [2024-06-21 21:34:00,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828622867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:00,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:00,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:00,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312631469] [2024-06-21 21:34:00,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:00,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:00,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:00,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:00,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:00,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:00,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 820 transitions, 17958 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 21:34:00,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:00,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:00,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:03,114 INFO L124 PetriNetUnfolderBase]: 6975/10705 cut-off events. [2024-06-21 21:34:03,114 INFO L125 PetriNetUnfolderBase]: For 563805/563805 co-relation queries the response was YES. [2024-06-21 21:34:03,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101312 conditions, 10705 events. 6975/10705 cut-off events. For 563805/563805 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 67368 event pairs, 2696 based on Foata normal form. 4/10709 useless extension candidates. Maximal degree in co-relation 101182. Up to 10436 conditions per place. [2024-06-21 21:34:03,269 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 810 selfloop transitions, 35 changer transitions 0/848 dead transitions. [2024-06-21 21:34:03,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 848 transitions, 19842 flow [2024-06-21 21:34:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:34:03,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:34:03,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-21 21:34:03,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36944444444444446 [2024-06-21 21:34:03,271 INFO L175 Difference]: Start difference. First operand has 283 places, 820 transitions, 17958 flow. Second operand 9 states and 133 transitions. [2024-06-21 21:34:03,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 848 transitions, 19842 flow [2024-06-21 21:34:04,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 848 transitions, 19769 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 21:34:04,845 INFO L231 Difference]: Finished difference. Result has 287 places, 822 transitions, 18024 flow [2024-06-21 21:34:04,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17885, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=785, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18024, PETRI_PLACES=287, PETRI_TRANSITIONS=822} [2024-06-21 21:34:04,846 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-21 21:34:04,846 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 822 transitions, 18024 flow [2024-06-21 21:34:04,846 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 21:34:04,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:04,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:04,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 21:34:04,847 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:04,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:04,847 INFO L85 PathProgramCache]: Analyzing trace with hash -560841533, now seen corresponding path program 1 times [2024-06-21 21:34:04,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:04,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488808021] [2024-06-21 21:34:04,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:04,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:05,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:05,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488808021] [2024-06-21 21:34:05,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488808021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:05,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:05,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:05,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609074287] [2024-06-21 21:34:05,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:05,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:05,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:05,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:05,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:06,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:06,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 822 transitions, 18024 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 21:34:06,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:06,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:06,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:08,989 INFO L124 PetriNetUnfolderBase]: 6925/10613 cut-off events. [2024-06-21 21:34:08,989 INFO L125 PetriNetUnfolderBase]: For 573301/573305 co-relation queries the response was YES. [2024-06-21 21:34:09,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100591 conditions, 10613 events. 6925/10613 cut-off events. For 573301/573305 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 66548 event pairs, 2690 based on Foata normal form. 8/10621 useless extension candidates. Maximal degree in co-relation 100460. Up to 10325 conditions per place. [2024-06-21 21:34:09,131 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 791 selfloop transitions, 53 changer transitions 0/847 dead transitions. [2024-06-21 21:34:09,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 847 transitions, 19896 flow [2024-06-21 21:34:09,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:34:09,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:34:09,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 21:34:09,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 21:34:09,133 INFO L175 Difference]: Start difference. First operand has 287 places, 822 transitions, 18024 flow. Second operand 7 states and 113 transitions. [2024-06-21 21:34:09,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 847 transitions, 19896 flow [2024-06-21 21:34:10,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 847 transitions, 19691 flow, removed 67 selfloop flow, removed 8 redundant places. [2024-06-21 21:34:10,768 INFO L231 Difference]: Finished difference. Result has 286 places, 823 transitions, 17996 flow [2024-06-21 21:34:10,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17827, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=769, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17996, PETRI_PLACES=286, PETRI_TRANSITIONS=823} [2024-06-21 21:34:10,768 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 245 predicate places. [2024-06-21 21:34:10,768 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 823 transitions, 17996 flow [2024-06-21 21:34:10,768 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 21:34:10,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:10,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:10,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 21:34:10,769 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 21:34:10,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:10,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1319749297, now seen corresponding path program 1 times [2024-06-21 21:34:10,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:10,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167811187] [2024-06-21 21:34:10,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:10,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:11,506 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 21:34:11,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:11,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167811187] [2024-06-21 21:34:11,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167811187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:11,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:11,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:34:11,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473214579] [2024-06-21 21:34:11,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:11,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:34:11,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:11,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:34:11,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:34:11,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 21:34:11,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 823 transitions, 17996 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 21:34:11,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:11,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 21:34:11,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:14,252 INFO L124 PetriNetUnfolderBase]: 6637/10216 cut-off events. [2024-06-21 21:34:14,252 INFO L125 PetriNetUnfolderBase]: For 569051/569439 co-relation queries the response was YES. [2024-06-21 21:34:14,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97087 conditions, 10216 events. 6637/10216 cut-off events. For 569051/569439 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 64412 event pairs, 2116 based on Foata normal form. 288/10439 useless extension candidates. Maximal degree in co-relation 96957. Up to 9769 conditions per place. [2024-06-21 21:34:14,637 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 746 selfloop transitions, 58 changer transitions 0/841 dead transitions. [2024-06-21 21:34:14,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 841 transitions, 19778 flow [2024-06-21 21:34:14,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:34:14,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:34:14,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-21 21:34:14,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2024-06-21 21:34:14,638 INFO L175 Difference]: Start difference. First operand has 286 places, 823 transitions, 17996 flow. Second operand 5 states and 93 transitions. [2024-06-21 21:34:14,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 841 transitions, 19778 flow [2024-06-21 21:34:16,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 841 transitions, 19653 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 21:34:16,022 INFO L231 Difference]: Finished difference. Result has 286 places, 826 transitions, 18113 flow [2024-06-21 21:34:16,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17871, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=765, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=18113, PETRI_PLACES=286, PETRI_TRANSITIONS=826} [2024-06-21 21:34:16,023 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 245 predicate places. [2024-06-21 21:34:16,023 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 826 transitions, 18113 flow [2024-06-21 21:34:16,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 21:34:16,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:16,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:16,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 21:34:16,024 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:16,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:16,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1666932139, now seen corresponding path program 1 times [2024-06-21 21:34:16,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:16,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969716633] [2024-06-21 21:34:16,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:16,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:16,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:16,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969716633] [2024-06-21 21:34:16,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969716633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:16,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:16,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:16,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916218209] [2024-06-21 21:34:16,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:16,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:16,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:16,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:16,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:16,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:16,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 826 transitions, 18113 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 21:34:16,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:16,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:16,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:20,376 INFO L124 PetriNetUnfolderBase]: 7486/11523 cut-off events. [2024-06-21 21:34:20,376 INFO L125 PetriNetUnfolderBase]: For 650248/650266 co-relation queries the response was YES. [2024-06-21 21:34:20,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108762 conditions, 11523 events. 7486/11523 cut-off events. For 650248/650266 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 73733 event pairs, 1584 based on Foata normal form. 36/11559 useless extension candidates. Maximal degree in co-relation 108631. Up to 7510 conditions per place. [2024-06-21 21:34:20,522 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 462 selfloop transitions, 429 changer transitions 0/894 dead transitions. [2024-06-21 21:34:20,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 894 transitions, 20729 flow [2024-06-21 21:34:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:34:20,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:34:20,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 21:34:20,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-21 21:34:20,523 INFO L175 Difference]: Start difference. First operand has 286 places, 826 transitions, 18113 flow. Second operand 10 states and 184 transitions. [2024-06-21 21:34:20,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 894 transitions, 20729 flow [2024-06-21 21:34:22,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 894 transitions, 20593 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 21:34:22,256 INFO L231 Difference]: Finished difference. Result has 293 places, 836 transitions, 19262 flow [2024-06-21 21:34:22,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17987, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=421, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19262, PETRI_PLACES=293, PETRI_TRANSITIONS=836} [2024-06-21 21:34:22,257 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-21 21:34:22,257 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 836 transitions, 19262 flow [2024-06-21 21:34:22,257 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 21:34:22,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:22,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:22,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 21:34:22,257 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 21:34:22,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:22,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1668809809, now seen corresponding path program 2 times [2024-06-21 21:34:22,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:22,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914665196] [2024-06-21 21:34:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:22,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:22,885 INFO 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 21:34:22,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:22,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914665196] [2024-06-21 21:34:22,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914665196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:22,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:22,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:22,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69023540] [2024-06-21 21:34:22,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:22,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:22,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:22,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:22,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:22,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:22,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 836 transitions, 19262 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 21:34:22,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:22,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:22,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:26,804 INFO L124 PetriNetUnfolderBase]: 7747/11977 cut-off events. [2024-06-21 21:34:26,804 INFO L125 PetriNetUnfolderBase]: For 671925/671943 co-relation queries the response was YES. [2024-06-21 21:34:26,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113291 conditions, 11977 events. 7747/11977 cut-off events. For 671925/671943 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 77955 event pairs, 1815 based on Foata normal form. 60/12037 useless extension candidates. Maximal degree in co-relation 113159. Up to 9679 conditions per place. [2024-06-21 21:34:26,950 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 474 selfloop transitions, 417 changer transitions 0/894 dead transitions. [2024-06-21 21:34:26,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 894 transitions, 21559 flow [2024-06-21 21:34:26,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:34:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:34:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 21:34:26,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-06-21 21:34:26,951 INFO L175 Difference]: Start difference. First operand has 293 places, 836 transitions, 19262 flow. Second operand 10 states and 182 transitions. [2024-06-21 21:34:26,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 894 transitions, 21559 flow [2024-06-21 21:34:28,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 894 transitions, 21250 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 21:34:28,545 INFO L231 Difference]: Finished difference. Result has 298 places, 841 transitions, 19956 flow [2024-06-21 21:34:28,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18953, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=412, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19956, PETRI_PLACES=298, PETRI_TRANSITIONS=841} [2024-06-21 21:34:28,545 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 257 predicate places. [2024-06-21 21:34:28,546 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 841 transitions, 19956 flow [2024-06-21 21:34:28,546 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 21:34:28,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:28,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:28,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 21:34:28,546 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 21:34:28,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:28,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1358704029, now seen corresponding path program 3 times [2024-06-21 21:34:28,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:28,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449969191] [2024-06-21 21:34:28,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:28,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:29,170 INFO 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 21:34:29,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:29,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449969191] [2024-06-21 21:34:29,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449969191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:29,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:29,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:29,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779486491] [2024-06-21 21:34:29,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:29,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:29,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:29,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:29,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:29,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:29,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 841 transitions, 19956 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 21:34:29,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:29,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:29,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:33,203 INFO L124 PetriNetUnfolderBase]: 8038/12444 cut-off events. [2024-06-21 21:34:33,203 INFO L125 PetriNetUnfolderBase]: For 712486/712504 co-relation queries the response was YES. [2024-06-21 21:34:33,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119895 conditions, 12444 events. 8038/12444 cut-off events. For 712486/712504 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 81611 event pairs, 1877 based on Foata normal form. 44/12488 useless extension candidates. Maximal degree in co-relation 119761. Up to 9220 conditions per place. [2024-06-21 21:34:33,354 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 482 selfloop transitions, 421 changer transitions 0/906 dead transitions. [2024-06-21 21:34:33,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 906 transitions, 22573 flow [2024-06-21 21:34:33,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:34:33,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:34:33,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 21:34:33,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-21 21:34:33,355 INFO L175 Difference]: Start difference. First operand has 298 places, 841 transitions, 19956 flow. Second operand 10 states and 185 transitions. [2024-06-21 21:34:33,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 906 transitions, 22573 flow [2024-06-21 21:34:35,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 906 transitions, 21824 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-21 21:34:35,188 INFO L231 Difference]: Finished difference. Result has 299 places, 848 transitions, 20300 flow [2024-06-21 21:34:35,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19207, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20300, PETRI_PLACES=299, PETRI_TRANSITIONS=848} [2024-06-21 21:34:35,189 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 258 predicate places. [2024-06-21 21:34:35,189 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 848 transitions, 20300 flow [2024-06-21 21:34:35,189 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 21:34:35,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:35,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:35,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 21:34:35,190 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 21:34:35,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:35,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1662413657, now seen corresponding path program 1 times [2024-06-21 21:34:35,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:35,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121066278] [2024-06-21 21:34:35,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:35,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:36,226 INFO 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 21:34:36,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:36,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121066278] [2024-06-21 21:34:36,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121066278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:36,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:36,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:34:36,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889709378] [2024-06-21 21:34:36,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:36,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:34:36,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:36,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:34:36,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:34:36,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:36,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 848 transitions, 20300 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:36,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:36,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:36,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:40,315 INFO L124 PetriNetUnfolderBase]: 8077/12503 cut-off events. [2024-06-21 21:34:40,315 INFO L125 PetriNetUnfolderBase]: For 719996/720001 co-relation queries the response was YES. [2024-06-21 21:34:40,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120816 conditions, 12503 events. 8077/12503 cut-off events. For 719996/720001 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 82467 event pairs, 2718 based on Foata normal form. 10/12513 useless extension candidates. Maximal degree in co-relation 120681. Up to 11822 conditions per place. [2024-06-21 21:34:40,473 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 758 selfloop transitions, 140 changer transitions 0/901 dead transitions. [2024-06-21 21:34:40,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 901 transitions, 22486 flow [2024-06-21 21:34:40,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:34:40,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:34:40,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 199 transitions. [2024-06-21 21:34:40,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41458333333333336 [2024-06-21 21:34:40,475 INFO L175 Difference]: Start difference. First operand has 299 places, 848 transitions, 20300 flow. Second operand 12 states and 199 transitions. [2024-06-21 21:34:40,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 901 transitions, 22486 flow [2024-06-21 21:34:42,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 901 transitions, 22089 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 21:34:42,450 INFO L231 Difference]: Finished difference. Result has 306 places, 852 transitions, 20327 flow [2024-06-21 21:34:42,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19903, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=848, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=20327, PETRI_PLACES=306, PETRI_TRANSITIONS=852} [2024-06-21 21:34:42,451 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-21 21:34:42,451 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 852 transitions, 20327 flow [2024-06-21 21:34:42,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:42,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:42,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:42,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 21:34:42,452 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:42,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:42,453 INFO L85 PathProgramCache]: Analyzing trace with hash -805094617, now seen corresponding path program 4 times [2024-06-21 21:34:42,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:42,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319480231] [2024-06-21 21:34:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:42,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:43,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:43,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319480231] [2024-06-21 21:34:43,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319480231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:43,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:43,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:43,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649143339] [2024-06-21 21:34:43,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:43,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:43,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:43,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:43,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:43,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 21:34:43,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 852 transitions, 20327 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 21:34:43,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:43,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 21:34:43,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:47,251 INFO L124 PetriNetUnfolderBase]: 8371/12974 cut-off events. [2024-06-21 21:34:47,251 INFO L125 PetriNetUnfolderBase]: For 799476/799481 co-relation queries the response was YES. [2024-06-21 21:34:47,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126574 conditions, 12974 events. 8371/12974 cut-off events. For 799476/799481 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 86228 event pairs, 2710 based on Foata normal form. 34/13008 useless extension candidates. Maximal degree in co-relation 126437. Up to 11224 conditions per place. [2024-06-21 21:34:47,435 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 760 selfloop transitions, 144 changer transitions 0/907 dead transitions. [2024-06-21 21:34:47,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 907 transitions, 22809 flow [2024-06-21 21:34:47,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:34:47,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:34:47,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 21:34:47,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2024-06-21 21:34:47,436 INFO L175 Difference]: Start difference. First operand has 306 places, 852 transitions, 20327 flow. Second operand 10 states and 178 transitions. [2024-06-21 21:34:47,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 907 transitions, 22809 flow