./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix051_power.oepc_power.opt_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix051_power.oepc_power.opt_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix051_power.oepc_power.opt_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix051_power.oepc_power.opt_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 19:52:04,611 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:52:04,674 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:52:04,678 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:52:04,679 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:52:04,702 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:52:04,703 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:52:04,703 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:52:04,704 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:52:04,707 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:52:04,707 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:52:04,707 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:52:04,708 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:52:04,709 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:52:04,709 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:52:04,709 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:52:04,710 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:52:04,710 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:52:04,710 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:52:04,710 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:52:04,710 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:52:04,711 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:52:04,711 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:52:04,711 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:52:04,711 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:52:04,712 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:52:04,712 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:52:04,712 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:52:04,713 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:52:04,713 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:52:04,713 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:52:04,714 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:52:04,714 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:52:04,714 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:52:04,714 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:52:04,714 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:52:04,714 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:52:04,715 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:52:04,716 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:52:04,716 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:52:04,726 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:52:04,727 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:52:04,727 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:52:04,727 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:52:04,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:52:04,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:52:04,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:52:04,948 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:52:04,949 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:52:04,950 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix051_power.oepc_power.opt_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-03 19:52:05,134 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:52:05,134 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:52:05,135 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix051_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-03 19:52:06,161 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:52:06,350 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:52:06,350 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix051_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-03 19:52:06,366 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d88f94665/4ee1646589bc4bed96c3571efa6bb99e/FLAG116718c1f [2024-06-03 19:52:06,376 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d88f94665/4ee1646589bc4bed96c3571efa6bb99e [2024-06-03 19:52:06,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:52:06,377 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:52:06,378 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:52:06,378 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:52:06,382 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:52:06,383 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:52:05" (1/2) ... [2024-06-03 19:52:06,383 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@789a3e05 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:52:06, skipping insertion in model container [2024-06-03 19:52:06,383 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:52:05" (1/2) ... [2024-06-03 19:52:06,384 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@40352395 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:52:06, skipping insertion in model container [2024-06-03 19:52:06,384 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:52:06" (2/2) ... [2024-06-03 19:52:06,385 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@789a3e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:06, skipping insertion in model container [2024-06-03 19:52:06,385 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:52:06" (2/2) ... [2024-06-03 19:52:06,385 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:52:06,499 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:52:06,499 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] (((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-03 19:52:06,500 INFO L97 edCorrectnessWitness]: Location invariant before [L868-L868] (((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-03 19:52:06,500 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] (((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-03 19:52:06,500 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] (((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-03 19:52:06,500 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:52:06,500 INFO L106 edCorrectnessWitness]: ghost_update [L862-L862] multithreaded = 1; [2024-06-03 19:52:06,538 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:52:06,876 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:52:06,893 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:52:07,003 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:52:07,029 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:52:07,030 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:07 WrapperNode [2024-06-03 19:52:07,030 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:52:07,030 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:52:07,030 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:52:07,030 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:52:07,035 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:07" (1/1) ... [2024-06-03 19:52:07,056 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:07" (1/1) ... [2024-06-03 19:52:07,085 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 138 [2024-06-03 19:52:07,085 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:52:07,086 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:52:07,091 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:52:07,092 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:52:07,100 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:07" (1/1) ... [2024-06-03 19:52:07,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:07" (1/1) ... [2024-06-03 19:52:07,108 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:07" (1/1) ... [2024-06-03 19:52:07,125 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 19:52:07,125 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:07" (1/1) ... [2024-06-03 19:52:07,125 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:07" (1/1) ... [2024-06-03 19:52:07,134 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:07" (1/1) ... [2024-06-03 19:52:07,139 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:07" (1/1) ... [2024-06-03 19:52:07,142 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:07" (1/1) ... [2024-06-03 19:52:07,144 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:07" (1/1) ... [2024-06-03 19:52:07,147 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:52:07,148 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:52:07,148 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:52:07,148 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:52:07,149 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:07" (1/1) ... [2024-06-03 19:52:07,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:52:07,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:52:07,171 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 19:52:07,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 19:52:07,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:52:07,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:52:07,201 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:52:07,201 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:52:07,202 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:52:07,202 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:52:07,202 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:52:07,202 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:52:07,202 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-03 19:52:07,203 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-03 19:52:07,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:52:07,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:52:07,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:52:07,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:52:07,205 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:52:07,354 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:52:07,358 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:52:07,734 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:52:07,734 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:52:07,877 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:52:07,877 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:52:07,878 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:52:07 BoogieIcfgContainer [2024-06-03 19:52:07,878 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:52:07,881 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:52:07,881 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:52:07,883 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:52:07,883 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:52:05" (1/4) ... [2024-06-03 19:52:07,884 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570daa60 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:52:07, skipping insertion in model container [2024-06-03 19:52:07,884 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:52:06" (2/4) ... [2024-06-03 19:52:07,884 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570daa60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:52:07, skipping insertion in model container [2024-06-03 19:52:07,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:07" (3/4) ... [2024-06-03 19:52:07,885 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570daa60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:52:07, skipping insertion in model container [2024-06-03 19:52:07,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:52:07" (4/4) ... [2024-06-03 19:52:07,886 INFO L112 eAbstractionObserver]: Analyzing ICFG mix051_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-03 19:52:07,898 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:52:07,899 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-03 19:52:07,899 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:52:07,939 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:52:07,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-03 19:52:07,995 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-03 19:52:07,995 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:52:07,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:52:07,997 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-03 19:52:08,000 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-03 19:52:08,011 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:52:08,017 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;@51a828bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:52:08,018 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-03 19:52:08,022 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:52:08,022 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:52:08,022 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:52:08,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:08,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:52:08,023 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:08,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:08,028 INFO L85 PathProgramCache]: Analyzing trace with hash -565529638, now seen corresponding path program 1 times [2024-06-03 19:52:08,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:08,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860508079] [2024-06-03 19:52:08,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:08,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:09,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:09,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860508079] [2024-06-03 19:52:09,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860508079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:09,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:09,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:52:09,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925963296] [2024-06-03 19:52:09,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:09,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:52:09,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:09,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:52:09,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:52:09,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:52:09,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 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) [2024-06-03 19:52:09,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:09,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:52:09,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:10,613 INFO L124 PetriNetUnfolderBase]: 9587/13194 cut-off events. [2024-06-03 19:52:10,613 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-06-03 19:52:10,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26604 conditions, 13194 events. 9587/13194 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70125 event pairs, 7462 based on Foata normal form. 1/13009 useless extension candidates. Maximal degree in co-relation 26588. Up to 13017 conditions per place. [2024-06-03 19:52:10,698 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 45 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-03 19:52:10,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 233 flow [2024-06-03 19:52:10,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:52:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:52:10,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-03 19:52:10,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-03 19:52:10,718 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 93 transitions. [2024-06-03 19:52:10,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 233 flow [2024-06-03 19:52:10,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 19:52:10,725 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-03 19:52:10,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-03 19:52:10,730 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-03 19:52:10,730 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-03 19:52:10,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 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) [2024-06-03 19:52:10,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:10,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:10,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:52:10,731 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:10,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:10,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1986891129, now seen corresponding path program 1 times [2024-06-03 19:52:10,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:10,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49124550] [2024-06-03 19:52:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:10,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:11,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:11,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49124550] [2024-06-03 19:52:11,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49124550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:11,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:11,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:52:11,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339695186] [2024-06-03 19:52:11,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:11,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:52:11,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:11,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:52:11,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:52:11,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:52:11,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 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) [2024-06-03 19:52:11,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:11,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:52:11,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:12,955 INFO L124 PetriNetUnfolderBase]: 9577/13188 cut-off events. [2024-06-03 19:52:12,956 INFO L125 PetriNetUnfolderBase]: For 2471/2471 co-relation queries the response was YES. [2024-06-03 19:52:12,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30039 conditions, 13188 events. 9577/13188 cut-off events. For 2471/2471 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70075 event pairs, 6775 based on Foata normal form. 4/13189 useless extension candidates. Maximal degree in co-relation 30024. Up to 12982 conditions per place. [2024-06-03 19:52:13,038 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 55 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-03 19:52:13,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 325 flow [2024-06-03 19:52:13,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:52:13,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:52:13,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-03 19:52:13,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-03 19:52:13,040 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 120 transitions. [2024-06-03 19:52:13,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 325 flow [2024-06-03 19:52:13,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:52:13,043 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-03 19:52:13,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-03 19:52:13,043 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-03 19:52:13,044 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-03 19:52:13,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 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) [2024-06-03 19:52:13,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:13,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:13,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:52:13,045 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:13,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:13,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1464083749, now seen corresponding path program 1 times [2024-06-03 19:52:13,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:13,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588008567] [2024-06-03 19:52:13,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:13,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:13,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:13,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588008567] [2024-06-03 19:52:13,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588008567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:13,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:13,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:52:13,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272895383] [2024-06-03 19:52:13,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:13,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:52:13,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:13,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:52:13,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:52:14,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:52:14,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:14,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:14,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:52:14,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:15,240 INFO L124 PetriNetUnfolderBase]: 9685/13380 cut-off events. [2024-06-03 19:52:15,240 INFO L125 PetriNetUnfolderBase]: For 7314/7314 co-relation queries the response was YES. [2024-06-03 19:52:15,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33921 conditions, 13380 events. 9685/13380 cut-off events. For 7314/7314 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 71673 event pairs, 5476 based on Foata normal form. 10/13375 useless extension candidates. Maximal degree in co-relation 33904. Up to 12955 conditions per place. [2024-06-03 19:52:15,306 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 75 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-03 19:52:15,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 102 transitions, 549 flow [2024-06-03 19:52:15,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:52:15,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:52:15,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-03 19:52:15,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6115384615384616 [2024-06-03 19:52:15,308 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 5 states and 159 transitions. [2024-06-03 19:52:15,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 102 transitions, 549 flow [2024-06-03 19:52:15,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 102 transitions, 530 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 19:52:15,312 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 312 flow [2024-06-03 19:52:15,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-03 19:52:15,313 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-03 19:52:15,313 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 312 flow [2024-06-03 19:52:15,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:15,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:15,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:15,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:52:15,314 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:15,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:15,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1858043112, now seen corresponding path program 1 times [2024-06-03 19:52:15,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:15,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163874375] [2024-06-03 19:52:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:15,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:16,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:16,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163874375] [2024-06-03 19:52:16,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163874375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:16,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:16,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:52:16,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808351693] [2024-06-03 19:52:16,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:16,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:52:16,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:16,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:52:16,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:52:16,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:52:16,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:16,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:16,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:52:16,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:17,789 INFO L124 PetriNetUnfolderBase]: 9731/13427 cut-off events. [2024-06-03 19:52:17,790 INFO L125 PetriNetUnfolderBase]: For 17604/17604 co-relation queries the response was YES. [2024-06-03 19:52:17,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40338 conditions, 13427 events. 9731/13427 cut-off events. For 17604/17604 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 71515 event pairs, 4763 based on Foata normal form. 10/13422 useless extension candidates. Maximal degree in co-relation 40318. Up to 12951 conditions per place. [2024-06-03 19:52:17,874 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 86 selfloop transitions, 26 changer transitions 0/118 dead transitions. [2024-06-03 19:52:17,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 118 transitions, 730 flow [2024-06-03 19:52:17,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:52:17,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:52:17,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-03 19:52:17,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-06-03 19:52:17,877 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 312 flow. Second operand 6 states and 188 transitions. [2024-06-03 19:52:17,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 118 transitions, 730 flow [2024-06-03 19:52:17,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 118 transitions, 718 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-03 19:52:17,889 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 406 flow [2024-06-03 19:52:17,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=406, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-03 19:52:17,891 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-03 19:52:17,891 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 406 flow [2024-06-03 19:52:17,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:17,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:17,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:17,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:52:17,892 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:17,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:17,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1764760668, now seen corresponding path program 1 times [2024-06-03 19:52:17,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:17,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892714982] [2024-06-03 19:52:17,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:17,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:19,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:19,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892714982] [2024-06-03 19:52:19,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892714982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:19,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:19,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:52:19,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137274589] [2024-06-03 19:52:19,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:19,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:52:19,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:19,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:52:19,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:52:19,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:52:19,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 406 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:19,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:19,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:52:19,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:20,661 INFO L124 PetriNetUnfolderBase]: 9946/13779 cut-off events. [2024-06-03 19:52:20,662 INFO L125 PetriNetUnfolderBase]: For 28410/28414 co-relation queries the response was YES. [2024-06-03 19:52:20,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45886 conditions, 13779 events. 9946/13779 cut-off events. For 28410/28414 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 74041 event pairs, 3760 based on Foata normal form. 41/13814 useless extension candidates. Maximal degree in co-relation 45863. Up to 12888 conditions per place. [2024-06-03 19:52:20,772 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 101 selfloop transitions, 44 changer transitions 0/151 dead transitions. [2024-06-03 19:52:20,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 151 transitions, 1082 flow [2024-06-03 19:52:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:52:20,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:52:20,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-03 19:52:20,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098901098901099 [2024-06-03 19:52:20,774 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 406 flow. Second operand 7 states and 222 transitions. [2024-06-03 19:52:20,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 151 transitions, 1082 flow [2024-06-03 19:52:20,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 151 transitions, 1016 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:52:20,790 INFO L231 Difference]: Finished difference. Result has 74 places, 88 transitions, 665 flow [2024-06-03 19:52:20,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=665, PETRI_PLACES=74, PETRI_TRANSITIONS=88} [2024-06-03 19:52:20,791 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-06-03 19:52:20,791 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 88 transitions, 665 flow [2024-06-03 19:52:20,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:20,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:20,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:20,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:52:20,792 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:20,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:20,792 INFO L85 PathProgramCache]: Analyzing trace with hash -2114653015, now seen corresponding path program 1 times [2024-06-03 19:52:20,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:20,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580355438] [2024-06-03 19:52:20,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:20,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:21,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:21,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580355438] [2024-06-03 19:52:21,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580355438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:21,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:21,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:52:21,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837977534] [2024-06-03 19:52:21,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:21,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:52:21,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:21,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:52:21,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:52:21,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-03 19:52:21,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 88 transitions, 665 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:21,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:21,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-03 19:52:21,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:22,929 INFO L124 PetriNetUnfolderBase]: 9928/13756 cut-off events. [2024-06-03 19:52:22,929 INFO L125 PetriNetUnfolderBase]: For 51028/51028 co-relation queries the response was YES. [2024-06-03 19:52:22,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53079 conditions, 13756 events. 9928/13756 cut-off events. For 51028/51028 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 73994 event pairs, 4704 based on Foata normal form. 6/13759 useless extension candidates. Maximal degree in co-relation 53051. Up to 13489 conditions per place. [2024-06-03 19:52:23,027 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 86 selfloop transitions, 13 changer transitions 0/105 dead transitions. [2024-06-03 19:52:23,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 105 transitions, 907 flow [2024-06-03 19:52:23,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:52:23,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:52:23,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-03 19:52:23,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2024-06-03 19:52:23,029 INFO L175 Difference]: Start difference. First operand has 74 places, 88 transitions, 665 flow. Second operand 5 states and 124 transitions. [2024-06-03 19:52:23,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 105 transitions, 907 flow [2024-06-03 19:52:23,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 105 transitions, 857 flow, removed 25 selfloop flow, removed 0 redundant places. [2024-06-03 19:52:23,079 INFO L231 Difference]: Finished difference. Result has 79 places, 88 transitions, 655 flow [2024-06-03 19:52:23,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=655, PETRI_PLACES=79, PETRI_TRANSITIONS=88} [2024-06-03 19:52:23,082 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-03 19:52:23,082 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 88 transitions, 655 flow [2024-06-03 19:52:23,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:23,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:23,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:23,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:52:23,083 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:23,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:23,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1526551322, now seen corresponding path program 1 times [2024-06-03 19:52:23,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:23,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640413306] [2024-06-03 19:52:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:23,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:23,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:23,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640413306] [2024-06-03 19:52:23,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640413306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:23,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:23,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:52:23,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881040477] [2024-06-03 19:52:23,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:23,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:52:23,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:23,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:52:23,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:52:24,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-03 19:52:24,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 88 transitions, 655 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:24,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:24,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-03 19:52:24,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:25,387 INFO L124 PetriNetUnfolderBase]: 9954/13783 cut-off events. [2024-06-03 19:52:25,387 INFO L125 PetriNetUnfolderBase]: For 56172/56172 co-relation queries the response was YES. [2024-06-03 19:52:25,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53386 conditions, 13783 events. 9954/13783 cut-off events. For 56172/56172 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 73865 event pairs, 4443 based on Foata normal form. 12/13790 useless extension candidates. Maximal degree in co-relation 53354. Up to 13336 conditions per place. [2024-06-03 19:52:25,483 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 93 selfloop transitions, 25 changer transitions 0/124 dead transitions. [2024-06-03 19:52:25,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 124 transitions, 1061 flow [2024-06-03 19:52:25,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:52:25,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:52:25,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-03 19:52:25,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064102564102564 [2024-06-03 19:52:25,485 INFO L175 Difference]: Start difference. First operand has 79 places, 88 transitions, 655 flow. Second operand 6 states and 158 transitions. [2024-06-03 19:52:25,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 124 transitions, 1061 flow [2024-06-03 19:52:25,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 124 transitions, 1020 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 19:52:25,527 INFO L231 Difference]: Finished difference. Result has 81 places, 92 transitions, 723 flow [2024-06-03 19:52:25,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=723, PETRI_PLACES=81, PETRI_TRANSITIONS=92} [2024-06-03 19:52:25,528 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2024-06-03 19:52:25,528 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 92 transitions, 723 flow [2024-06-03 19:52:25,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:25,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:25,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:25,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:52:25,529 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:25,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:25,529 INFO L85 PathProgramCache]: Analyzing trace with hash -661270952, now seen corresponding path program 2 times [2024-06-03 19:52:25,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:25,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038975175] [2024-06-03 19:52:25,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:25,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:26,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:26,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038975175] [2024-06-03 19:52:26,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038975175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:26,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:26,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:52:26,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024918506] [2024-06-03 19:52:26,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:26,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:52:26,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:26,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:52:26,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:52:26,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-03 19:52:26,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 92 transitions, 723 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:26,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:26,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-03 19:52:26,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:27,894 INFO L124 PetriNetUnfolderBase]: 9903/13713 cut-off events. [2024-06-03 19:52:27,894 INFO L125 PetriNetUnfolderBase]: For 63666/63666 co-relation queries the response was YES. [2024-06-03 19:52:27,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54251 conditions, 13713 events. 9903/13713 cut-off events. For 63666/63666 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 73647 event pairs, 4668 based on Foata normal form. 6/13716 useless extension candidates. Maximal degree in co-relation 54219. Up to 13435 conditions per place. [2024-06-03 19:52:27,993 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 97 selfloop transitions, 14 changer transitions 0/117 dead transitions. [2024-06-03 19:52:27,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 1011 flow [2024-06-03 19:52:27,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:52:27,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:52:27,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-03 19:52:27,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-03 19:52:27,995 INFO L175 Difference]: Start difference. First operand has 81 places, 92 transitions, 723 flow. Second operand 6 states and 147 transitions. [2024-06-03 19:52:27,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 1011 flow [2024-06-03 19:52:28,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 117 transitions, 968 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 19:52:28,049 INFO L231 Difference]: Finished difference. Result has 84 places, 92 transitions, 719 flow [2024-06-03 19:52:28,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=719, PETRI_PLACES=84, PETRI_TRANSITIONS=92} [2024-06-03 19:52:28,049 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 29 predicate places. [2024-06-03 19:52:28,049 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 92 transitions, 719 flow [2024-06-03 19:52:28,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:28,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:28,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:28,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:52:28,050 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:28,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:28,050 INFO L85 PathProgramCache]: Analyzing trace with hash 98928792, now seen corresponding path program 1 times [2024-06-03 19:52:28,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:28,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365616514] [2024-06-03 19:52:28,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:28,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:29,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:29,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365616514] [2024-06-03 19:52:29,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365616514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:29,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:29,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:52:29,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853711678] [2024-06-03 19:52:29,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:29,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:52:29,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:29,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:52:29,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:52:29,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-03 19:52:29,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 92 transitions, 719 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:29,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:29,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-03 19:52:29,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:31,252 INFO L124 PetriNetUnfolderBase]: 12015/16593 cut-off events. [2024-06-03 19:52:31,252 INFO L125 PetriNetUnfolderBase]: For 85965/85965 co-relation queries the response was YES. [2024-06-03 19:52:31,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65161 conditions, 16593 events. 12015/16593 cut-off events. For 85965/85965 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 89301 event pairs, 5700 based on Foata normal form. 6/16596 useless extension candidates. Maximal degree in co-relation 65128. Up to 16226 conditions per place. [2024-06-03 19:52:31,373 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 106 selfloop transitions, 20 changer transitions 0/131 dead transitions. [2024-06-03 19:52:31,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 131 transitions, 1124 flow [2024-06-03 19:52:31,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:52:31,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:52:31,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 19:52:31,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-06-03 19:52:31,375 INFO L175 Difference]: Start difference. First operand has 84 places, 92 transitions, 719 flow. Second operand 7 states and 164 transitions. [2024-06-03 19:52:31,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 131 transitions, 1124 flow [2024-06-03 19:52:31,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 131 transitions, 1054 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 19:52:31,454 INFO L231 Difference]: Finished difference. Result has 86 places, 99 transitions, 783 flow [2024-06-03 19:52:31,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=783, PETRI_PLACES=86, PETRI_TRANSITIONS=99} [2024-06-03 19:52:31,455 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-03 19:52:31,455 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 99 transitions, 783 flow [2024-06-03 19:52:31,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:31,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:31,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:31,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:52:31,455 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:31,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:31,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1225873988, now seen corresponding path program 1 times [2024-06-03 19:52:31,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:31,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131720109] [2024-06-03 19:52:31,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:31,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:32,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:32,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:32,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131720109] [2024-06-03 19:52:32,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131720109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:32,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:32,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:52:32,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658906281] [2024-06-03 19:52:32,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:32,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:52:32,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:32,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:52:32,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:52:32,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-03 19:52:32,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 99 transitions, 783 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:32,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:32,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-03 19:52:32,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:33,865 INFO L124 PetriNetUnfolderBase]: 12001/16499 cut-off events. [2024-06-03 19:52:33,865 INFO L125 PetriNetUnfolderBase]: For 101418/101418 co-relation queries the response was YES. [2024-06-03 19:52:33,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68622 conditions, 16499 events. 12001/16499 cut-off events. For 101418/101418 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 87579 event pairs, 5767 based on Foata normal form. 4/16500 useless extension candidates. Maximal degree in co-relation 68588. Up to 16265 conditions per place. [2024-06-03 19:52:33,952 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 103 selfloop transitions, 10 changer transitions 0/118 dead transitions. [2024-06-03 19:52:33,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 118 transitions, 1085 flow [2024-06-03 19:52:33,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:52:33,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:52:33,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-03 19:52:33,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461538461538462 [2024-06-03 19:52:33,954 INFO L175 Difference]: Start difference. First operand has 86 places, 99 transitions, 783 flow. Second operand 5 states and 116 transitions. [2024-06-03 19:52:33,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 118 transitions, 1085 flow [2024-06-03 19:52:34,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 118 transitions, 1025 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-03 19:52:34,009 INFO L231 Difference]: Finished difference. Result has 87 places, 103 transitions, 798 flow [2024-06-03 19:52:34,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=798, PETRI_PLACES=87, PETRI_TRANSITIONS=103} [2024-06-03 19:52:34,010 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 32 predicate places. [2024-06-03 19:52:34,010 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 103 transitions, 798 flow [2024-06-03 19:52:34,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:34,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:34,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:34,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:52:34,011 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:34,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:34,011 INFO L85 PathProgramCache]: Analyzing trace with hash 786101975, now seen corresponding path program 1 times [2024-06-03 19:52:34,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:34,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084278168] [2024-06-03 19:52:34,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:34,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:35,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:35,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084278168] [2024-06-03 19:52:35,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084278168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:35,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:35,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:52:35,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951048163] [2024-06-03 19:52:35,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:35,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:52:35,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:35,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:52:35,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:52:35,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-03 19:52:35,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 103 transitions, 798 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:35,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:35,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-03 19:52:35,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:36,998 INFO L124 PetriNetUnfolderBase]: 11652/16052 cut-off events. [2024-06-03 19:52:36,998 INFO L125 PetriNetUnfolderBase]: For 117644/117644 co-relation queries the response was YES. [2024-06-03 19:52:37,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70276 conditions, 16052 events. 11652/16052 cut-off events. For 117644/117644 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 87368 event pairs, 5065 based on Foata normal form. 6/16051 useless extension candidates. Maximal degree in co-relation 70241. Up to 15510 conditions per place. [2024-06-03 19:52:37,103 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 111 selfloop transitions, 37 changer transitions 0/155 dead transitions. [2024-06-03 19:52:37,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 155 transitions, 1268 flow [2024-06-03 19:52:37,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:52:37,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:52:37,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-03 19:52:37,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49759615384615385 [2024-06-03 19:52:37,105 INFO L175 Difference]: Start difference. First operand has 87 places, 103 transitions, 798 flow. Second operand 8 states and 207 transitions. [2024-06-03 19:52:37,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 155 transitions, 1268 flow [2024-06-03 19:52:37,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 155 transitions, 1223 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-03 19:52:37,174 INFO L231 Difference]: Finished difference. Result has 92 places, 107 transitions, 891 flow [2024-06-03 19:52:37,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=891, PETRI_PLACES=92, PETRI_TRANSITIONS=107} [2024-06-03 19:52:37,175 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 37 predicate places. [2024-06-03 19:52:37,175 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 107 transitions, 891 flow [2024-06-03 19:52:37,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:37,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:37,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:37,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:52:37,175 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:37,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:37,176 INFO L85 PathProgramCache]: Analyzing trace with hash -483480153, now seen corresponding path program 1 times [2024-06-03 19:52:37,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:37,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657179722] [2024-06-03 19:52:37,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:37,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:38,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:38,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657179722] [2024-06-03 19:52:38,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657179722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:38,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:38,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:52:38,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455689510] [2024-06-03 19:52:38,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:38,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:52:38,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:38,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:52:38,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:52:38,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-03 19:52:38,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 107 transitions, 891 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:38,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:38,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-03 19:52:38,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:40,125 INFO L124 PetriNetUnfolderBase]: 12009/16496 cut-off events. [2024-06-03 19:52:40,125 INFO L125 PetriNetUnfolderBase]: For 140353/140353 co-relation queries the response was YES. [2024-06-03 19:52:40,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76137 conditions, 16496 events. 12009/16496 cut-off events. For 140353/140353 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 87636 event pairs, 5622 based on Foata normal form. 3/16496 useless extension candidates. Maximal degree in co-relation 76101. Up to 16205 conditions per place. [2024-06-03 19:52:40,267 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 113 selfloop transitions, 25 changer transitions 0/143 dead transitions. [2024-06-03 19:52:40,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 143 transitions, 1295 flow [2024-06-03 19:52:40,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:52:40,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:52:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 19:52:40,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532967032967033 [2024-06-03 19:52:40,274 INFO L175 Difference]: Start difference. First operand has 92 places, 107 transitions, 891 flow. Second operand 7 states and 165 transitions. [2024-06-03 19:52:40,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 143 transitions, 1295 flow [2024-06-03 19:52:40,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 143 transitions, 1175 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 19:52:40,372 INFO L231 Difference]: Finished difference. Result has 93 places, 111 transitions, 889 flow [2024-06-03 19:52:40,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=889, PETRI_PLACES=93, PETRI_TRANSITIONS=111} [2024-06-03 19:52:40,372 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 38 predicate places. [2024-06-03 19:52:40,372 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 111 transitions, 889 flow [2024-06-03 19:52:40,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:40,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:40,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:40,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:52:40,373 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:40,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:40,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1400701205, now seen corresponding path program 1 times [2024-06-03 19:52:40,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:40,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218723257] [2024-06-03 19:52:40,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:40,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:41,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:41,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218723257] [2024-06-03 19:52:41,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218723257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:41,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:41,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:52:41,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445064056] [2024-06-03 19:52:41,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:41,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:52:41,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:41,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:52:41,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:52:41,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-03 19:52:41,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 111 transitions, 889 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:41,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:41,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-03 19:52:41,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:43,777 INFO L124 PetriNetUnfolderBase]: 12256/17005 cut-off events. [2024-06-03 19:52:43,777 INFO L125 PetriNetUnfolderBase]: For 163747/163747 co-relation queries the response was YES. [2024-06-03 19:52:43,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79395 conditions, 17005 events. 12256/17005 cut-off events. For 163747/163747 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 93941 event pairs, 3491 based on Foata normal form. 24/17014 useless extension candidates. Maximal degree in co-relation 79358. Up to 15470 conditions per place. [2024-06-03 19:52:43,869 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 128 selfloop transitions, 43 changer transitions 0/178 dead transitions. [2024-06-03 19:52:43,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 178 transitions, 1579 flow [2024-06-03 19:52:43,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:52:43,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:52:43,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-03 19:52:43,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168269230769231 [2024-06-03 19:52:43,871 INFO L175 Difference]: Start difference. First operand has 93 places, 111 transitions, 889 flow. Second operand 8 states and 215 transitions. [2024-06-03 19:52:43,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 178 transitions, 1579 flow [2024-06-03 19:52:43,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 178 transitions, 1508 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:52:43,962 INFO L231 Difference]: Finished difference. Result has 96 places, 117 transitions, 1016 flow [2024-06-03 19:52:43,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1016, PETRI_PLACES=96, PETRI_TRANSITIONS=117} [2024-06-03 19:52:43,963 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2024-06-03 19:52:43,963 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 117 transitions, 1016 flow [2024-06-03 19:52:43,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:43,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:43,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:43,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:52:43,963 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:43,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:43,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1400640755, now seen corresponding path program 2 times [2024-06-03 19:52:43,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:43,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625888374] [2024-06-03 19:52:43,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:43,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:45,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:45,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:45,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625888374] [2024-06-03 19:52:45,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625888374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:45,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:45,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:52:45,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006298470] [2024-06-03 19:52:45,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:45,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:52:45,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:45,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:52:45,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:52:45,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-03 19:52:45,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 117 transitions, 1016 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:45,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:45,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-03 19:52:45,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:47,354 INFO L124 PetriNetUnfolderBase]: 12464/17347 cut-off events. [2024-06-03 19:52:47,354 INFO L125 PetriNetUnfolderBase]: For 190640/190645 co-relation queries the response was YES. [2024-06-03 19:52:47,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84142 conditions, 17347 events. 12464/17347 cut-off events. For 190640/190645 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 96644 event pairs, 4608 based on Foata normal form. 34/17365 useless extension candidates. Maximal degree in co-relation 84103. Up to 16339 conditions per place. [2024-06-03 19:52:47,484 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 114 selfloop transitions, 57 changer transitions 0/178 dead transitions. [2024-06-03 19:52:47,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 178 transitions, 1664 flow [2024-06-03 19:52:47,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:52:47,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:52:47,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-03 19:52:47,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-03 19:52:47,486 INFO L175 Difference]: Start difference. First operand has 96 places, 117 transitions, 1016 flow. Second operand 8 states and 212 transitions. [2024-06-03 19:52:47,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 178 transitions, 1664 flow [2024-06-03 19:52:47,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 178 transitions, 1604 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 19:52:47,638 INFO L231 Difference]: Finished difference. Result has 100 places, 123 transitions, 1150 flow [2024-06-03 19:52:47,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1150, PETRI_PLACES=100, PETRI_TRANSITIONS=123} [2024-06-03 19:52:47,638 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 45 predicate places. [2024-06-03 19:52:47,638 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 123 transitions, 1150 flow [2024-06-03 19:52:47,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:47,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:47,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:47,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:52:47,639 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:47,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:47,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1804695357, now seen corresponding path program 3 times [2024-06-03 19:52:47,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:47,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725365895] [2024-06-03 19:52:47,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:47,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:48,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:48,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725365895] [2024-06-03 19:52:48,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725365895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:48,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:48,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:52:48,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319693058] [2024-06-03 19:52:48,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:48,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:52:48,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:48,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:52:48,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:52:48,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-03 19:52:48,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 123 transitions, 1150 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:48,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:48,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-03 19:52:48,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:50,981 INFO L124 PetriNetUnfolderBase]: 12598/17526 cut-off events. [2024-06-03 19:52:50,981 INFO L125 PetriNetUnfolderBase]: For 212523/212523 co-relation queries the response was YES. [2024-06-03 19:52:51,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86831 conditions, 17526 events. 12598/17526 cut-off events. For 212523/212523 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 97681 event pairs, 4717 based on Foata normal form. 42/17561 useless extension candidates. Maximal degree in co-relation 86790. Up to 16643 conditions per place. [2024-06-03 19:52:51,130 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 131 selfloop transitions, 38 changer transitions 0/176 dead transitions. [2024-06-03 19:52:51,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 176 transitions, 1688 flow [2024-06-03 19:52:51,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:52:51,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:52:51,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-03 19:52:51,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49759615384615385 [2024-06-03 19:52:51,131 INFO L175 Difference]: Start difference. First operand has 100 places, 123 transitions, 1150 flow. Second operand 8 states and 207 transitions. [2024-06-03 19:52:51,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 176 transitions, 1688 flow [2024-06-03 19:52:51,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 176 transitions, 1585 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 19:52:51,585 INFO L231 Difference]: Finished difference. Result has 104 places, 126 transitions, 1191 flow [2024-06-03 19:52:51,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1047, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1191, PETRI_PLACES=104, PETRI_TRANSITIONS=126} [2024-06-03 19:52:51,585 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-03 19:52:51,586 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 126 transitions, 1191 flow [2024-06-03 19:52:51,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:51,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:51,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:51,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:52:51,586 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:51,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:51,587 INFO L85 PathProgramCache]: Analyzing trace with hash 168777911, now seen corresponding path program 1 times [2024-06-03 19:52:51,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:51,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972416223] [2024-06-03 19:52:51,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:51,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:52,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:52,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972416223] [2024-06-03 19:52:52,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972416223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:52,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:52,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:52:52,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092884500] [2024-06-03 19:52:52,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:52,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:52:52,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:52,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:52:52,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:52:52,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-03 19:52:52,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 126 transitions, 1191 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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) [2024-06-03 19:52:52,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:52,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-03 19:52:52,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:54,371 INFO L124 PetriNetUnfolderBase]: 12974/17983 cut-off events. [2024-06-03 19:52:54,371 INFO L125 PetriNetUnfolderBase]: For 231407/231407 co-relation queries the response was YES. [2024-06-03 19:52:54,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90852 conditions, 17983 events. 12974/17983 cut-off events. For 231407/231407 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 97825 event pairs, 5545 based on Foata normal form. 4/17983 useless extension candidates. Maximal degree in co-relation 90810. Up to 17641 conditions per place. [2024-06-03 19:52:54,496 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 140 selfloop transitions, 21 changer transitions 0/166 dead transitions. [2024-06-03 19:52:54,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 166 transitions, 1753 flow [2024-06-03 19:52:54,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:52:54,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:52:54,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-03 19:52:54,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-03 19:52:54,498 INFO L175 Difference]: Start difference. First operand has 104 places, 126 transitions, 1191 flow. Second operand 6 states and 146 transitions. [2024-06-03 19:52:54,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 166 transitions, 1753 flow [2024-06-03 19:52:54,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 166 transitions, 1640 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 19:52:54,701 INFO L231 Difference]: Finished difference. Result has 104 places, 138 transitions, 1259 flow [2024-06-03 19:52:54,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1259, PETRI_PLACES=104, PETRI_TRANSITIONS=138} [2024-06-03 19:52:54,702 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-03 19:52:54,702 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 138 transitions, 1259 flow [2024-06-03 19:52:54,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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) [2024-06-03 19:52:54,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:54,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:54,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:52:54,703 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:54,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:54,703 INFO L85 PathProgramCache]: Analyzing trace with hash 344870105, now seen corresponding path program 1 times [2024-06-03 19:52:54,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:54,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893368005] [2024-06-03 19:52:54,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:54,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:55,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:55,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893368005] [2024-06-03 19:52:55,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893368005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:55,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:55,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:52:55,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268994067] [2024-06-03 19:52:55,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:55,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:52:55,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:55,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:52:55,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:52:56,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-03 19:52:56,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 138 transitions, 1259 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:56,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:56,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-03 19:52:56,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:58,524 INFO L124 PetriNetUnfolderBase]: 13010/18038 cut-off events. [2024-06-03 19:52:58,525 INFO L125 PetriNetUnfolderBase]: For 258447/258447 co-relation queries the response was YES. [2024-06-03 19:52:58,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94882 conditions, 18038 events. 13010/18038 cut-off events. For 258447/258447 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 98241 event pairs, 5556 based on Foata normal form. 6/18041 useless extension candidates. Maximal degree in co-relation 94838. Up to 17630 conditions per place. [2024-06-03 19:52:58,686 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 153 selfloop transitions, 28 changer transitions 0/186 dead transitions. [2024-06-03 19:52:58,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 186 transitions, 1825 flow [2024-06-03 19:52:58,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:52:58,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:52:58,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-03 19:52:58,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543269230769231 [2024-06-03 19:52:58,688 INFO L175 Difference]: Start difference. First operand has 104 places, 138 transitions, 1259 flow. Second operand 8 states and 189 transitions. [2024-06-03 19:52:58,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 186 transitions, 1825 flow [2024-06-03 19:52:58,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 186 transitions, 1785 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-03 19:52:58,950 INFO L231 Difference]: Finished difference. Result has 112 places, 145 transitions, 1399 flow [2024-06-03 19:52:58,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1399, PETRI_PLACES=112, PETRI_TRANSITIONS=145} [2024-06-03 19:52:58,951 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2024-06-03 19:52:58,951 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 145 transitions, 1399 flow [2024-06-03 19:52:58,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:58,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:58,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:58,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:52:58,951 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:58,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:58,952 INFO L85 PathProgramCache]: Analyzing trace with hash 581045465, now seen corresponding path program 2 times [2024-06-03 19:52:58,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:58,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231183550] [2024-06-03 19:52:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:58,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:00,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:00,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231183550] [2024-06-03 19:53:00,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231183550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:00,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:00,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:53:00,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811099993] [2024-06-03 19:53:00,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:00,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:53:00,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:00,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:53:00,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:53:00,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-03 19:53:00,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 145 transitions, 1399 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:00,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:00,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-03 19:53:00,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:02,408 INFO L124 PetriNetUnfolderBase]: 13031/18069 cut-off events. [2024-06-03 19:53:02,408 INFO L125 PetriNetUnfolderBase]: For 286102/286102 co-relation queries the response was YES. [2024-06-03 19:53:02,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97835 conditions, 18069 events. 13031/18069 cut-off events. For 286102/286102 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 98271 event pairs, 5547 based on Foata normal form. 12/18078 useless extension candidates. Maximal degree in co-relation 97787. Up to 17646 conditions per place. [2024-06-03 19:53:02,574 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 155 selfloop transitions, 30 changer transitions 0/190 dead transitions. [2024-06-03 19:53:02,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 190 transitions, 1977 flow [2024-06-03 19:53:02,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:02,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:02,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-03 19:53:02,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495192307692308 [2024-06-03 19:53:02,576 INFO L175 Difference]: Start difference. First operand has 112 places, 145 transitions, 1399 flow. Second operand 8 states and 187 transitions. [2024-06-03 19:53:02,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 190 transitions, 1977 flow [2024-06-03 19:53:02,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 190 transitions, 1871 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-03 19:53:02,871 INFO L231 Difference]: Finished difference. Result has 115 places, 150 transitions, 1480 flow [2024-06-03 19:53:02,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1480, PETRI_PLACES=115, PETRI_TRANSITIONS=150} [2024-06-03 19:53:02,872 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-03 19:53:02,872 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 150 transitions, 1480 flow [2024-06-03 19:53:02,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:02,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:02,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:02,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:53:02,873 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:02,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1447283677, now seen corresponding path program 1 times [2024-06-03 19:53:02,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:02,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788053577] [2024-06-03 19:53:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:02,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:03,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:03,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788053577] [2024-06-03 19:53:03,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788053577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:03,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:03,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:53:03,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129657457] [2024-06-03 19:53:03,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:03,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:53:03,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:03,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:53:03,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:53:04,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-03 19:53:04,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 150 transitions, 1480 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:04,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:04,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-03 19:53:04,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:06,027 INFO L124 PetriNetUnfolderBase]: 12986/17998 cut-off events. [2024-06-03 19:53:06,027 INFO L125 PetriNetUnfolderBase]: For 315083/315091 co-relation queries the response was YES. [2024-06-03 19:53:06,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100313 conditions, 17998 events. 12986/17998 cut-off events. For 315083/315091 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 97853 event pairs, 5046 based on Foata normal form. 7/18001 useless extension candidates. Maximal degree in co-relation 100264. Up to 17338 conditions per place. [2024-06-03 19:53:06,231 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 132 selfloop transitions, 47 changer transitions 0/184 dead transitions. [2024-06-03 19:53:06,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 184 transitions, 1936 flow [2024-06-03 19:53:06,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:53:06,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:53:06,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-03 19:53:06,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032051282051282 [2024-06-03 19:53:06,234 INFO L175 Difference]: Start difference. First operand has 115 places, 150 transitions, 1480 flow. Second operand 6 states and 157 transitions. [2024-06-03 19:53:06,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 184 transitions, 1936 flow [2024-06-03 19:53:06,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 184 transitions, 1785 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-03 19:53:06,656 INFO L231 Difference]: Finished difference. Result has 115 places, 150 transitions, 1444 flow [2024-06-03 19:53:06,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1444, PETRI_PLACES=115, PETRI_TRANSITIONS=150} [2024-06-03 19:53:06,657 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-03 19:53:06,657 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 150 transitions, 1444 flow [2024-06-03 19:53:06,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:06,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:06,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:06,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:53:06,658 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:06,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:06,658 INFO L85 PathProgramCache]: Analyzing trace with hash -2102684203, now seen corresponding path program 3 times [2024-06-03 19:53:06,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:06,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449721753] [2024-06-03 19:53:06,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:06,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:07,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:07,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449721753] [2024-06-03 19:53:07,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449721753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:07,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:07,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:53:07,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015390185] [2024-06-03 19:53:07,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:07,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:53:07,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:07,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:53:07,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:53:07,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-03 19:53:07,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 150 transitions, 1444 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:07,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:07,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-03 19:53:07,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:10,229 INFO L124 PetriNetUnfolderBase]: 12971/17973 cut-off events. [2024-06-03 19:53:10,229 INFO L125 PetriNetUnfolderBase]: For 336856/336856 co-relation queries the response was YES. [2024-06-03 19:53:10,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101180 conditions, 17973 events. 12971/17973 cut-off events. For 336856/336856 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 97534 event pairs, 5391 based on Foata normal form. 6/17976 useless extension candidates. Maximal degree in co-relation 101130. Up to 17587 conditions per place. [2024-06-03 19:53:10,399 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 165 selfloop transitions, 23 changer transitions 0/193 dead transitions. [2024-06-03 19:53:10,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 193 transitions, 1980 flow [2024-06-03 19:53:10,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:10,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:10,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-03 19:53:10,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44711538461538464 [2024-06-03 19:53:10,400 INFO L175 Difference]: Start difference. First operand has 115 places, 150 transitions, 1444 flow. Second operand 8 states and 186 transitions. [2024-06-03 19:53:10,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 193 transitions, 1980 flow [2024-06-03 19:53:10,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 193 transitions, 1886 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 19:53:10,852 INFO L231 Difference]: Finished difference. Result has 118 places, 153 transitions, 1470 flow [2024-06-03 19:53:10,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1470, PETRI_PLACES=118, PETRI_TRANSITIONS=153} [2024-06-03 19:53:10,852 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-03 19:53:10,852 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 153 transitions, 1470 flow [2024-06-03 19:53:10,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:10,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:10,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:10,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:53:10,853 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:10,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:10,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1243823269, now seen corresponding path program 2 times [2024-06-03 19:53:10,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:10,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580317455] [2024-06-03 19:53:10,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:10,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:11,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:11,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580317455] [2024-06-03 19:53:11,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580317455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:11,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:11,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:53:11,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961679238] [2024-06-03 19:53:11,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:11,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:53:11,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:11,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:53:11,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:53:11,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-03 19:53:11,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 153 transitions, 1470 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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) [2024-06-03 19:53:11,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:11,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-03 19:53:11,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:13,882 INFO L124 PetriNetUnfolderBase]: 12957/17955 cut-off events. [2024-06-03 19:53:13,882 INFO L125 PetriNetUnfolderBase]: For 369808/369808 co-relation queries the response was YES. [2024-06-03 19:53:13,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103645 conditions, 17955 events. 12957/17955 cut-off events. For 369808/369808 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 97499 event pairs, 5544 based on Foata normal form. 4/17956 useless extension candidates. Maximal degree in co-relation 103594. Up to 17655 conditions per place. [2024-06-03 19:53:14,046 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 153 selfloop transitions, 14 changer transitions 0/172 dead transitions. [2024-06-03 19:53:14,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 172 transitions, 1854 flow [2024-06-03 19:53:14,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:53:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:53:14,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-03 19:53:14,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326923076923077 [2024-06-03 19:53:14,047 INFO L175 Difference]: Start difference. First operand has 118 places, 153 transitions, 1470 flow. Second operand 6 states and 135 transitions. [2024-06-03 19:53:14,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 172 transitions, 1854 flow [2024-06-03 19:53:14,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 172 transitions, 1736 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-03 19:53:14,444 INFO L231 Difference]: Finished difference. Result has 118 places, 153 transitions, 1389 flow [2024-06-03 19:53:14,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1389, PETRI_PLACES=118, PETRI_TRANSITIONS=153} [2024-06-03 19:53:14,445 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-03 19:53:14,445 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 153 transitions, 1389 flow [2024-06-03 19:53:14,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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) [2024-06-03 19:53:14,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:14,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:14,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:53:14,445 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:14,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:14,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1249531237, now seen corresponding path program 1 times [2024-06-03 19:53:14,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:14,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926529240] [2024-06-03 19:53:14,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:14,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:15,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:15,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926529240] [2024-06-03 19:53:15,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926529240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:15,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:15,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:53:15,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767064764] [2024-06-03 19:53:15,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:15,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:53:15,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:15,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:53:15,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:53:15,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-03 19:53:15,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 153 transitions, 1389 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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) [2024-06-03 19:53:15,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:15,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-03 19:53:15,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:18,161 INFO L124 PetriNetUnfolderBase]: 12989/17995 cut-off events. [2024-06-03 19:53:18,161 INFO L125 PetriNetUnfolderBase]: For 395365/395365 co-relation queries the response was YES. [2024-06-03 19:53:18,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104734 conditions, 17995 events. 12989/17995 cut-off events. For 395365/395365 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 97812 event pairs, 5540 based on Foata normal form. 4/17995 useless extension candidates. Maximal degree in co-relation 104682. Up to 17644 conditions per place. [2024-06-03 19:53:18,322 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 157 selfloop transitions, 24 changer transitions 0/186 dead transitions. [2024-06-03 19:53:18,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 186 transitions, 2005 flow [2024-06-03 19:53:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:53:18,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:53:18,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-03 19:53:18,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-03 19:53:18,323 INFO L175 Difference]: Start difference. First operand has 118 places, 153 transitions, 1389 flow. Second operand 6 states and 144 transitions. [2024-06-03 19:53:18,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 186 transitions, 2005 flow [2024-06-03 19:53:18,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 186 transitions, 1955 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 19:53:18,705 INFO L231 Difference]: Finished difference. Result has 119 places, 161 transitions, 1504 flow [2024-06-03 19:53:18,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1504, PETRI_PLACES=119, PETRI_TRANSITIONS=161} [2024-06-03 19:53:18,706 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-03 19:53:18,706 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 161 transitions, 1504 flow [2024-06-03 19:53:18,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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) [2024-06-03 19:53:18,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:18,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:18,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:53:18,707 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:18,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:18,707 INFO L85 PathProgramCache]: Analyzing trace with hash 215643773, now seen corresponding path program 2 times [2024-06-03 19:53:18,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:18,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447396289] [2024-06-03 19:53:18,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:18,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:19,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:19,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447396289] [2024-06-03 19:53:19,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447396289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:19,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:19,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:53:19,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012356335] [2024-06-03 19:53:19,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:19,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:53:19,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:19,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:53:19,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:53:19,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-03 19:53:19,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 161 transitions, 1504 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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) [2024-06-03 19:53:19,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:19,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-03 19:53:19,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:22,236 INFO L124 PetriNetUnfolderBase]: 12975/17981 cut-off events. [2024-06-03 19:53:22,236 INFO L125 PetriNetUnfolderBase]: For 430919/430924 co-relation queries the response was YES. [2024-06-03 19:53:22,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108327 conditions, 17981 events. 12975/17981 cut-off events. For 430919/430924 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 97699 event pairs, 5537 based on Foata normal form. 8/17985 useless extension candidates. Maximal degree in co-relation 108275. Up to 17632 conditions per place. [2024-06-03 19:53:22,365 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 152 selfloop transitions, 24 changer transitions 0/181 dead transitions. [2024-06-03 19:53:22,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 181 transitions, 1910 flow [2024-06-03 19:53:22,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:53:22,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:53:22,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-03 19:53:22,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-03 19:53:22,366 INFO L175 Difference]: Start difference. First operand has 119 places, 161 transitions, 1504 flow. Second operand 6 states and 138 transitions. [2024-06-03 19:53:22,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 181 transitions, 1910 flow [2024-06-03 19:53:22,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 181 transitions, 1823 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-03 19:53:22,732 INFO L231 Difference]: Finished difference. Result has 123 places, 161 transitions, 1475 flow [2024-06-03 19:53:22,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1475, PETRI_PLACES=123, PETRI_TRANSITIONS=161} [2024-06-03 19:53:22,732 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-06-03 19:53:22,733 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 161 transitions, 1475 flow [2024-06-03 19:53:22,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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) [2024-06-03 19:53:22,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:22,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:22,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:53:22,733 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:22,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:22,733 INFO L85 PathProgramCache]: Analyzing trace with hash -258375931, now seen corresponding path program 1 times [2024-06-03 19:53:22,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:22,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488864111] [2024-06-03 19:53:22,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:22,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:23,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:23,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488864111] [2024-06-03 19:53:23,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488864111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:23,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:23,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:23,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865301525] [2024-06-03 19:53:23,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:23,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:23,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:23,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:23,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:23,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-03 19:53:23,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 161 transitions, 1475 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:23,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:23,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-03 19:53:23,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:26,352 INFO L124 PetriNetUnfolderBase]: 13154/18194 cut-off events. [2024-06-03 19:53:26,353 INFO L125 PetriNetUnfolderBase]: For 462410/462415 co-relation queries the response was YES. [2024-06-03 19:53:26,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110241 conditions, 18194 events. 13154/18194 cut-off events. For 462410/462415 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 98533 event pairs, 5098 based on Foata normal form. 12/18200 useless extension candidates. Maximal degree in co-relation 110187. Up to 17537 conditions per place. [2024-06-03 19:53:26,500 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 176 selfloop transitions, 50 changer transitions 0/231 dead transitions. [2024-06-03 19:53:26,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 231 transitions, 2548 flow [2024-06-03 19:53:26,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:26,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:26,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-03 19:53:26,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-06-03 19:53:26,502 INFO L175 Difference]: Start difference. First operand has 123 places, 161 transitions, 1475 flow. Second operand 7 states and 180 transitions. [2024-06-03 19:53:26,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 231 transitions, 2548 flow [2024-06-03 19:53:27,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 231 transitions, 2454 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 19:53:27,049 INFO L231 Difference]: Finished difference. Result has 127 places, 189 transitions, 1899 flow [2024-06-03 19:53:27,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1899, PETRI_PLACES=127, PETRI_TRANSITIONS=189} [2024-06-03 19:53:27,050 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-03 19:53:27,050 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 189 transitions, 1899 flow [2024-06-03 19:53:27,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:27,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:27,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:27,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:53:27,051 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:27,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:27,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1104283919, now seen corresponding path program 1 times [2024-06-03 19:53:27,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:27,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013478807] [2024-06-03 19:53:27,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:27,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:28,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:28,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013478807] [2024-06-03 19:53:28,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013478807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:28,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:28,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:53:28,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922414452] [2024-06-03 19:53:28,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:28,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:53:28,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:28,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:53:28,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:53:28,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-03 19:53:28,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 189 transitions, 1899 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:28,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:28,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-03 19:53:28,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:31,415 INFO L124 PetriNetUnfolderBase]: 13234/18333 cut-off events. [2024-06-03 19:53:31,416 INFO L125 PetriNetUnfolderBase]: For 512315/512320 co-relation queries the response was YES. [2024-06-03 19:53:31,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117574 conditions, 18333 events. 13234/18333 cut-off events. For 512315/512320 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 99628 event pairs, 5036 based on Foata normal form. 8/18337 useless extension candidates. Maximal degree in co-relation 117517. Up to 17662 conditions per place. [2024-06-03 19:53:31,552 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 191 selfloop transitions, 50 changer transitions 0/246 dead transitions. [2024-06-03 19:53:31,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 246 transitions, 2640 flow [2024-06-03 19:53:31,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-03 19:53:31,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4831730769230769 [2024-06-03 19:53:31,553 INFO L175 Difference]: Start difference. First operand has 127 places, 189 transitions, 1899 flow. Second operand 8 states and 201 transitions. [2024-06-03 19:53:31,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 246 transitions, 2640 flow [2024-06-03 19:53:31,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 246 transitions, 2556 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-03 19:53:31,984 INFO L231 Difference]: Finished difference. Result has 135 places, 197 transitions, 2072 flow [2024-06-03 19:53:31,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2072, PETRI_PLACES=135, PETRI_TRANSITIONS=197} [2024-06-03 19:53:31,984 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 80 predicate places. [2024-06-03 19:53:31,984 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 197 transitions, 2072 flow [2024-06-03 19:53:31,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:31,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:31,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:31,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:53:31,985 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:31,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:31,985 INFO L85 PathProgramCache]: Analyzing trace with hash -604239875, now seen corresponding path program 2 times [2024-06-03 19:53:31,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:31,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119039070] [2024-06-03 19:53:31,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:31,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:33,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:33,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119039070] [2024-06-03 19:53:33,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119039070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:33,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:33,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:53:33,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900555839] [2024-06-03 19:53:33,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:33,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:53:33,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:33,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:53:33,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:53:33,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-03 19:53:33,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 197 transitions, 2072 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:33,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:33,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-03 19:53:33,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:36,298 INFO L124 PetriNetUnfolderBase]: 13314/18445 cut-off events. [2024-06-03 19:53:36,298 INFO L125 PetriNetUnfolderBase]: For 547749/547754 co-relation queries the response was YES. [2024-06-03 19:53:36,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120503 conditions, 18445 events. 13314/18445 cut-off events. For 547749/547754 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 100191 event pairs, 5060 based on Foata normal form. 8/18449 useless extension candidates. Maximal degree in co-relation 120442. Up to 17752 conditions per place. [2024-06-03 19:53:36,516 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 194 selfloop transitions, 52 changer transitions 0/251 dead transitions. [2024-06-03 19:53:36,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 251 transitions, 2833 flow [2024-06-03 19:53:36,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:36,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-03 19:53:36,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-03 19:53:36,518 INFO L175 Difference]: Start difference. First operand has 135 places, 197 transitions, 2072 flow. Second operand 8 states and 197 transitions. [2024-06-03 19:53:36,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 251 transitions, 2833 flow [2024-06-03 19:53:37,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 251 transitions, 2671 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-03 19:53:37,174 INFO L231 Difference]: Finished difference. Result has 139 places, 206 transitions, 2204 flow [2024-06-03 19:53:37,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1920, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2204, PETRI_PLACES=139, PETRI_TRANSITIONS=206} [2024-06-03 19:53:37,338 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 84 predicate places. [2024-06-03 19:53:37,338 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 206 transitions, 2204 flow [2024-06-03 19:53:37,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:37,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:37,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:37,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:53:37,339 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:37,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:37,339 INFO L85 PathProgramCache]: Analyzing trace with hash -604232435, now seen corresponding path program 3 times [2024-06-03 19:53:37,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:37,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5161012] [2024-06-03 19:53:37,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:37,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:38,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:38,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5161012] [2024-06-03 19:53:38,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5161012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:38,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:38,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:53:38,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783291012] [2024-06-03 19:53:38,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:38,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:53:38,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:38,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:53:38,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:53:38,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-03 19:53:38,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 206 transitions, 2204 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:38,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:38,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-03 19:53:38,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:41,547 INFO L124 PetriNetUnfolderBase]: 13350/18487 cut-off events. [2024-06-03 19:53:41,547 INFO L125 PetriNetUnfolderBase]: For 584866/584871 co-relation queries the response was YES. [2024-06-03 19:53:41,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122853 conditions, 18487 events. 13350/18487 cut-off events. For 584866/584871 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 100363 event pairs, 5038 based on Foata normal form. 8/18491 useless extension candidates. Maximal degree in co-relation 122790. Up to 17630 conditions per place. [2024-06-03 19:53:41,703 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 189 selfloop transitions, 63 changer transitions 0/257 dead transitions. [2024-06-03 19:53:41,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 257 transitions, 2944 flow [2024-06-03 19:53:41,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:41,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-03 19:53:41,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-03 19:53:41,705 INFO L175 Difference]: Start difference. First operand has 139 places, 206 transitions, 2204 flow. Second operand 8 states and 197 transitions. [2024-06-03 19:53:41,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 257 transitions, 2944 flow [2024-06-03 19:53:42,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 257 transitions, 2819 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-03 19:53:42,303 INFO L231 Difference]: Finished difference. Result has 145 places, 212 transitions, 2361 flow [2024-06-03 19:53:42,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2079, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2361, PETRI_PLACES=145, PETRI_TRANSITIONS=212} [2024-06-03 19:53:42,304 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 90 predicate places. [2024-06-03 19:53:42,304 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 212 transitions, 2361 flow [2024-06-03 19:53:42,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:42,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:42,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:42,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:53:42,305 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:42,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:42,305 INFO L85 PathProgramCache]: Analyzing trace with hash -258077401, now seen corresponding path program 2 times [2024-06-03 19:53:42,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:42,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509199175] [2024-06-03 19:53:42,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:42,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:43,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:43,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509199175] [2024-06-03 19:53:43,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509199175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:43,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:43,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:43,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147001648] [2024-06-03 19:53:43,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:43,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:43,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:43,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:43,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:43,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-03 19:53:43,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 212 transitions, 2361 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:43,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:43,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-03 19:53:43,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand