./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix053_power.oepc_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/mix053_power.oepc_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/mix053_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix053_power.oepc_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 [2024-06-04 15:21:36,541 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 15:21:36,583 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 15:21:36,587 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 15:21:36,587 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 15:21:36,603 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 15:21:36,604 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 15:21:36,605 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 15:21:36,605 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 15:21:36,606 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 15:21:36,606 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 15:21:36,607 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 15:21:36,607 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 15:21:36,608 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 15:21:36,608 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 15:21:36,609 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 15:21:36,609 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 15:21:36,609 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 15:21:36,610 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 15:21:36,610 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 15:21:36,610 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 15:21:36,611 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 15:21:36,611 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 15:21:36,611 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 15:21:36,612 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 15:21:36,612 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 15:21:36,612 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 15:21:36,613 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 15:21:36,613 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 15:21:36,613 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 15:21:36,614 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 15:21:36,614 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 15:21:36,614 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:21:36,614 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 15:21:36,615 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 15:21:36,615 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 15:21:36,615 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 15:21:36,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 15:21:36,616 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 15:21:36,616 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 15:21:36,617 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 15:21:36,617 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 15:21:36,617 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 15:21:36,618 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 15:21:36,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 15:21:36,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 15:21:36,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 15:21:36,872 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 15:21:36,873 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 15:21:36,873 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix053_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-04 15:21:37,107 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 15:21:37,107 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 15:21:37,109 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix053_power.oepc_pso.oepc_rmo.oepc.i [2024-06-04 15:21:38,264 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 15:21:38,493 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 15:21:38,494 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix053_power.oepc_pso.oepc_rmo.oepc.i [2024-06-04 15:21:38,507 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6041e29a/bc61989c9e274c20b456e2103e3bdb12/FLAG3f55f2c08 [2024-06-04 15:21:38,519 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6041e29a/bc61989c9e274c20b456e2103e3bdb12 [2024-06-04 15:21:38,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 15:21:38,521 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 15:21:38,521 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 15:21:38,522 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 15:21:38,525 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 15:21:38,526 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:21:37" (1/2) ... [2024-06-04 15:21:38,526 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37888cd6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:21:38, skipping insertion in model container [2024-06-04 15:21:38,527 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:21:37" (1/2) ... [2024-06-04 15:21:38,527 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@9b732c6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:21:38, skipping insertion in model container [2024-06-04 15:21:38,528 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:21:38" (2/2) ... [2024-06-04 15:21:38,528 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37888cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:21:38, skipping insertion in model container [2024-06-04 15:21:38,528 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:21:38" (2/2) ... [2024-06-04 15:21:38,528 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 15:21:38,620 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 15:21:38,621 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] ((((((((((((((((((((! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0) [2024-06-04 15:21:38,621 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] ((((((((((((((((((((! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0) [2024-06-04 15:21:38,622 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] ((((((((((((((((((((! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0) [2024-06-04 15:21:38,622 INFO L97 edCorrectnessWitness]: Location invariant before [L862-L862] ((((((((((((((((((((! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0) [2024-06-04 15:21:38,622 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 15:21:38,622 INFO L106 edCorrectnessWitness]: ghost_update [L860-L860] multithreaded = 1; [2024-06-04 15:21:38,661 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 15:21:38,958 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:21:38,969 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 15:21:39,130 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:21:39,188 INFO L206 MainTranslator]: Completed translation [2024-06-04 15:21:39,190 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:21:39 WrapperNode [2024-06-04 15:21:39,190 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 15:21:39,192 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 15:21:39,192 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 15:21:39,192 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 15:21:39,199 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:21:39" (1/1) ... [2024-06-04 15:21:39,214 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:21:39" (1/1) ... [2024-06-04 15:21:39,251 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 137 [2024-06-04 15:21:39,256 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 15:21:39,257 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 15:21:39,257 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 15:21:39,257 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 15:21:39,265 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:21:39" (1/1) ... [2024-06-04 15:21:39,266 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:21:39" (1/1) ... [2024-06-04 15:21:39,270 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:21:39" (1/1) ... [2024-06-04 15:21:39,284 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]. [2024-06-04 15:21:39,285 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:21:39" (1/1) ... [2024-06-04 15:21:39,285 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:21:39" (1/1) ... [2024-06-04 15:21:39,305 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:21:39" (1/1) ... [2024-06-04 15:21:39,307 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:21:39" (1/1) ... [2024-06-04 15:21:39,308 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:21:39" (1/1) ... [2024-06-04 15:21:39,310 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:21:39" (1/1) ... [2024-06-04 15:21:39,313 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 15:21:39,326 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 15:21:39,326 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 15:21:39,326 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 15:21:39,327 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:21:39" (1/1) ... [2024-06-04 15:21:39,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:21:39,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 15:21:39,367 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) [2024-06-04 15:21:39,416 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 [2024-06-04 15:21:39,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 15:21:39,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 15:21:39,432 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 15:21:39,432 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 15:21:39,432 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 15:21:39,433 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 15:21:39,433 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 15:21:39,433 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 15:21:39,433 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-04 15:21:39,433 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-04 15:21:39,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 15:21:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 15:21:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 15:21:39,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 15:21:39,436 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 15:21:39,556 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 15:21:39,562 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 15:21:39,935 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 15:21:39,935 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 15:21:40,072 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 15:21:40,073 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 15:21:40,073 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:21:40 BoogieIcfgContainer [2024-06-04 15:21:40,073 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 15:21:40,075 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 15:21:40,075 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 15:21:40,078 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 15:21:40,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:21:37" (1/4) ... [2024-06-04 15:21:40,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3912f5e8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:21:40, skipping insertion in model container [2024-06-04 15:21:40,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 03:21:38" (2/4) ... [2024-06-04 15:21:40,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3912f5e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:21:40, skipping insertion in model container [2024-06-04 15:21:40,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:21:39" (3/4) ... [2024-06-04 15:21:40,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3912f5e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:21:40, skipping insertion in model container [2024-06-04 15:21:40,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:21:40" (4/4) ... [2024-06-04 15:21:40,081 INFO L112 eAbstractionObserver]: Analyzing ICFG mix053_power.oepc_pso.oepc_rmo.oepc.i [2024-06-04 15:21:40,096 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 15:21:40,097 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-04 15:21:40,097 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 15:21:40,163 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 15:21:40,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-04 15:21:40,217 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-04 15:21:40,217 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:21:40,220 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 89 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. [2024-06-04 15:21:40,220 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-04 15:21:40,224 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-04 15:21:40,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 15:21:40,243 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;@2417a401, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 15:21:40,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-04 15:21:40,246 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 15:21:40,246 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 15:21:40,246 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:21:40,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:40,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 15:21:40,247 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)] === [2024-06-04 15:21:40,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:40,252 INFO L85 PathProgramCache]: Analyzing trace with hash -686363886, now seen corresponding path program 1 times [2024-06-04 15:21:40,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:40,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895535319] [2024-06-04 15:21:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:40,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:21:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:21:41,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:21:41,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895535319] [2024-06-04 15:21:41,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895535319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:21:41,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:21:41,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 15:21:41,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514708314] [2024-06-04 15:21:41,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:21:41,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 15:21:41,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:21:41,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 15:21:41,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 15:21:41,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:21:41,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:41,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:21:41,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:21:41,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:21:43,363 INFO L124 PetriNetUnfolderBase]: 11639/15920 cut-off events. [2024-06-04 15:21:43,364 INFO L125 PetriNetUnfolderBase]: For 219/219 co-relation queries the response was YES. [2024-06-04 15:21:43,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32138 conditions, 15920 events. 11639/15920 cut-off events. For 219/219 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 83829 event pairs, 9112 based on Foata normal form. 1/15700 useless extension candidates. Maximal degree in co-relation 32122. Up to 15753 conditions per place. [2024-06-04 15:21:43,529 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 46 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-04 15:21:43,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 235 flow [2024-06-04 15:21:43,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 15:21:43,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 15:21:43,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-06-04 15:21:43,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 15:21:43,542 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 91 transitions. [2024-06-04 15:21:43,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 235 flow [2024-06-04 15:21:43,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 228 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 15:21:43,551 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-04 15:21:43,553 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} [2024-06-04 15:21:43,556 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-04 15:21:43,556 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-04 15:21:43,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:43,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:43,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:21:43,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 15:21:43,557 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)] === [2024-06-04 15:21:43,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:43,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1829322609, now seen corresponding path program 1 times [2024-06-04 15:21:43,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:43,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318215859] [2024-06-04 15:21:43,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:43,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:21:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:21:44,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:21:44,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318215859] [2024-06-04 15:21:44,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318215859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:21:44,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:21:44,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 15:21:44,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453015418] [2024-06-04 15:21:44,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:21:44,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 15:21:44,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:21:44,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 15:21:44,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 15:21:44,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:21:44,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:44,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:21:44,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:21:44,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:21:45,835 INFO L124 PetriNetUnfolderBase]: 11629/15906 cut-off events. [2024-06-04 15:21:45,835 INFO L125 PetriNetUnfolderBase]: For 2878/2878 co-relation queries the response was YES. [2024-06-04 15:21:45,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36117 conditions, 15906 events. 11629/15906 cut-off events. For 2878/2878 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 83854 event pairs, 8311 based on Foata normal form. 4/15908 useless extension candidates. Maximal degree in co-relation 36102. Up to 15718 conditions per place. [2024-06-04 15:21:45,929 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 56 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-04 15:21:45,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 327 flow [2024-06-04 15:21:45,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 15:21:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 15:21:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-04 15:21:45,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-04 15:21:45,931 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 117 transitions. [2024-06-04 15:21:45,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 327 flow [2024-06-04 15:21:45,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 15:21:45,933 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-04 15:21:45,933 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} [2024-06-04 15:21:45,934 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-04 15:21:45,934 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-04 15:21:45,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:45,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:45,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:21:45,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 15:21:45,935 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)] === [2024-06-04 15:21:45,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:45,936 INFO L85 PathProgramCache]: Analyzing trace with hash 874427763, now seen corresponding path program 1 times [2024-06-04 15:21:45,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:45,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652050421] [2024-06-04 15:21:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:45,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:21:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:21:46,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:21:46,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652050421] [2024-06-04 15:21:46,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652050421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:21:46,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:21:46,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 15:21:46,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424926997] [2024-06-04 15:21:46,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:21:46,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 15:21:46,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:21:46,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 15:21:46,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 15:21:46,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:21:46,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:46,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:21:46,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:21:46,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:21:48,234 INFO L124 PetriNetUnfolderBase]: 11647/15980 cut-off events. [2024-06-04 15:21:48,234 INFO L125 PetriNetUnfolderBase]: For 8303/8303 co-relation queries the response was YES. [2024-06-04 15:21:48,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40215 conditions, 15980 events. 11647/15980 cut-off events. For 8303/8303 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 84600 event pairs, 6983 based on Foata normal form. 7/15985 useless extension candidates. Maximal degree in co-relation 40198. Up to 15639 conditions per place. [2024-06-04 15:21:48,327 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 74 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-04 15:21:48,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 100 transitions, 543 flow [2024-06-04 15:21:48,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:21:48,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:21:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-04 15:21:48,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884615384615385 [2024-06-04 15:21:48,332 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 5 states and 153 transitions. [2024-06-04 15:21:48,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 100 transitions, 543 flow [2024-06-04 15:21:48,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 100 transitions, 524 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-04 15:21:48,339 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 310 flow [2024-06-04 15:21:48,339 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=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-04 15:21:48,340 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-04 15:21:48,341 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 310 flow [2024-06-04 15:21:48,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:48,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:48,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:21:48,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 15:21:48,342 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)] === [2024-06-04 15:21:48,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:48,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1337458640, now seen corresponding path program 1 times [2024-06-04 15:21:48,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:48,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777345937] [2024-06-04 15:21:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:48,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:21:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:21:49,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:21:49,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777345937] [2024-06-04 15:21:49,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777345937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:21:49,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:21:49,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:21:49,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793414566] [2024-06-04 15:21:49,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:21:49,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:21:49,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:21:49,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:21:49,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:21:49,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:21:49,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:49,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:21:49,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:21:49,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:21:51,234 INFO L124 PetriNetUnfolderBase]: 11665/16007 cut-off events. [2024-06-04 15:21:51,235 INFO L125 PetriNetUnfolderBase]: For 19473/19477 co-relation queries the response was YES. [2024-06-04 15:21:51,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46459 conditions, 16007 events. 11665/16007 cut-off events. For 19473/19477 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 84654 event pairs, 6185 based on Foata normal form. 11/16016 useless extension candidates. Maximal degree in co-relation 46439. Up to 15625 conditions per place. [2024-06-04 15:21:51,336 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 84 selfloop transitions, 26 changer transitions 0/115 dead transitions. [2024-06-04 15:21:51,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 115 transitions, 712 flow [2024-06-04 15:21:51,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:21:51,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:21:51,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-04 15:21:51,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-04 15:21:51,337 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 310 flow. Second operand 6 states and 180 transitions. [2024-06-04 15:21:51,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 115 transitions, 712 flow [2024-06-04 15:21:51,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 115 transitions, 700 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-04 15:21:51,344 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 404 flow [2024-06-04 15:21:51,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=298, 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=404, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-04 15:21:51,345 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-04 15:21:51,345 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 404 flow [2024-06-04 15:21:51,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:51,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:51,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:21:51,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 15:21:51,346 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)] === [2024-06-04 15:21:51,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:51,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1488453326, now seen corresponding path program 1 times [2024-06-04 15:21:51,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:51,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883938926] [2024-06-04 15:21:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:51,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:21:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:21:52,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:21:52,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883938926] [2024-06-04 15:21:52,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883938926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:21:52,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:21:52,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:21:52,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589676599] [2024-06-04 15:21:52,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:21:52,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:21:52,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:21:52,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:21:52,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:21:52,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-04 15:21:52,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 404 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:52,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:21:52,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-04 15:21:52,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:21:54,032 INFO L124 PetriNetUnfolderBase]: 11694/16051 cut-off events. [2024-06-04 15:21:54,033 INFO L125 PetriNetUnfolderBase]: For 30865/30869 co-relation queries the response was YES. [2024-06-04 15:21:54,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51369 conditions, 16051 events. 11694/16051 cut-off events. For 30865/30869 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 85002 event pairs, 5263 based on Foata normal form. 18/16067 useless extension candidates. Maximal degree in co-relation 51346. Up to 15590 conditions per place. [2024-06-04 15:21:54,115 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 91 selfloop transitions, 30 changer transitions 0/126 dead transitions. [2024-06-04 15:21:54,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 126 transitions, 856 flow [2024-06-04 15:21:54,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:21:54,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:21:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-04 15:21:54,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-04 15:21:54,117 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 404 flow. Second operand 7 states and 203 transitions. [2024-06-04 15:21:54,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 126 transitions, 856 flow [2024-06-04 15:21:54,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 126 transitions, 790 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 15:21:54,127 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 443 flow [2024-06-04 15:21:54,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=443, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2024-06-04 15:21:54,128 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-04 15:21:54,128 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 443 flow [2024-06-04 15:21:54,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:54,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:54,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:21:54,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 15:21:54,129 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)] === [2024-06-04 15:21:54,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:54,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1655005422, now seen corresponding path program 1 times [2024-06-04 15:21:54,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:54,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718374923] [2024-06-04 15:21:54,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:54,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:21:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:21:54,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:21:54,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718374923] [2024-06-04 15:21:54,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718374923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:21:54,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:21:54,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:21:54,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651049275] [2024-06-04 15:21:54,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:21:54,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:21:54,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:21:54,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:21:54,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:21:54,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:21:54,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 443 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:54,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:21:54,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:21:54,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:21:56,329 INFO L124 PetriNetUnfolderBase]: 11685/16031 cut-off events. [2024-06-04 15:21:56,329 INFO L125 PetriNetUnfolderBase]: For 43610/43610 co-relation queries the response was YES. [2024-06-04 15:21:56,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55156 conditions, 16031 events. 11685/16031 cut-off events. For 43610/43610 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 84867 event pairs, 6112 based on Foata normal form. 3/16032 useless extension candidates. Maximal degree in co-relation 55132. Up to 15805 conditions per place. [2024-06-04 15:21:56,433 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 74 selfloop transitions, 10 changer transitions 0/89 dead transitions. [2024-06-04 15:21:56,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 89 transitions, 655 flow [2024-06-04 15:21:56,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:21:56,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:21:56,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-04 15:21:56,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576923076923077 [2024-06-04 15:21:56,435 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 443 flow. Second operand 5 states and 119 transitions. [2024-06-04 15:21:56,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 89 transitions, 655 flow [2024-06-04 15:21:56,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 89 transitions, 568 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 15:21:56,447 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 387 flow [2024-06-04 15:21:56,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=387, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2024-06-04 15:21:56,448 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-04 15:21:56,448 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 387 flow [2024-06-04 15:21:56,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:56,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:56,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:21:56,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 15:21:56,448 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)] === [2024-06-04 15:21:56,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:56,449 INFO L85 PathProgramCache]: Analyzing trace with hash -263066642, now seen corresponding path program 1 times [2024-06-04 15:21:56,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:56,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130835666] [2024-06-04 15:21:56,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:56,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:56,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:21:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:21:57,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:21:57,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130835666] [2024-06-04 15:21:57,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130835666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:21:57,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:21:57,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:21:57,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655310682] [2024-06-04 15:21:57,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:21:57,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:21:57,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:21:57,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:21:57,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:21:57,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:21:57,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 387 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:57,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:21:57,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:21:57,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:21:59,515 INFO L124 PetriNetUnfolderBase]: 11751/16128 cut-off events. [2024-06-04 15:21:59,515 INFO L125 PetriNetUnfolderBase]: For 50290/50290 co-relation queries the response was YES. [2024-06-04 15:21:59,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56196 conditions, 16128 events. 11751/16128 cut-off events. For 50290/50290 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 85079 event pairs, 5767 based on Foata normal form. 14/16139 useless extension candidates. Maximal degree in co-relation 56170. Up to 15681 conditions per place. [2024-06-04 15:21:59,655 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 92 selfloop transitions, 22 changer transitions 0/119 dead transitions. [2024-06-04 15:21:59,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 119 transitions, 839 flow [2024-06-04 15:21:59,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:21:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:21:59,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-04 15:21:59,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-06-04 15:21:59,656 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 387 flow. Second operand 6 states and 154 transitions. [2024-06-04 15:21:59,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 119 transitions, 839 flow [2024-06-04 15:21:59,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 119 transitions, 810 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 15:21:59,672 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 544 flow [2024-06-04 15:21:59,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=544, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2024-06-04 15:21:59,672 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-06-04 15:21:59,673 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 544 flow [2024-06-04 15:21:59,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:21:59,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:59,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:21:59,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 15:21:59,673 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)] === [2024-06-04 15:21:59,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:59,674 INFO L85 PathProgramCache]: Analyzing trace with hash 291479583, now seen corresponding path program 1 times [2024-06-04 15:21:59,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:59,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765597272] [2024-06-04 15:21:59,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:59,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:00,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:00,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765597272] [2024-06-04 15:22:00,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765597272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:00,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:00,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:22:00,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469861685] [2024-06-04 15:22:00,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:00,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:22:00,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:00,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:22:00,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:22:00,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:22:00,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 544 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:22:00,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:00,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:22:00,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:02,046 INFO L124 PetriNetUnfolderBase]: 11764/16150 cut-off events. [2024-06-04 15:22:02,046 INFO L125 PetriNetUnfolderBase]: For 70581/70589 co-relation queries the response was YES. [2024-06-04 15:22:02,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62514 conditions, 16150 events. 11764/16150 cut-off events. For 70581/70589 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 85346 event pairs, 5928 based on Foata normal form. 14/16162 useless extension candidates. Maximal degree in co-relation 62486. Up to 15795 conditions per place. [2024-06-04 15:22:02,159 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 90 selfloop transitions, 25 changer transitions 0/120 dead transitions. [2024-06-04 15:22:02,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 120 transitions, 923 flow [2024-06-04 15:22:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:22:02,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:22:02,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-04 15:22:02,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2024-06-04 15:22:02,161 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 544 flow. Second operand 6 states and 151 transitions. [2024-06-04 15:22:02,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 120 transitions, 923 flow [2024-06-04 15:22:02,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 120 transitions, 895 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-04 15:22:02,203 INFO L231 Difference]: Finished difference. Result has 79 places, 90 transitions, 612 flow [2024-06-04 15:22:02,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=612, PETRI_PLACES=79, PETRI_TRANSITIONS=90} [2024-06-04 15:22:02,203 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-04 15:22:02,203 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 90 transitions, 612 flow [2024-06-04 15:22:02,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:22:02,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:02,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:22:02,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 15:22:02,204 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)] === [2024-06-04 15:22:02,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:02,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1322335693, now seen corresponding path program 2 times [2024-06-04 15:22:02,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:02,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265424357] [2024-06-04 15:22:02,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:02,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:02,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:02,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265424357] [2024-06-04 15:22:02,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265424357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:02,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:02,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:22:02,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735532767] [2024-06-04 15:22:02,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:02,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:22:02,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:02,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:22:02,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:22:02,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:22:02,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 90 transitions, 612 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:22:02,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:02,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:22:02,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:04,771 INFO L124 PetriNetUnfolderBase]: 11734/16103 cut-off events. [2024-06-04 15:22:04,772 INFO L125 PetriNetUnfolderBase]: For 77749/77749 co-relation queries the response was YES. [2024-06-04 15:22:04,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63013 conditions, 16103 events. 11734/16103 cut-off events. For 77749/77749 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 85091 event pairs, 5921 based on Foata normal form. 3/16104 useless extension candidates. Maximal degree in co-relation 62982. Up to 15851 conditions per place. [2024-06-04 15:22:04,896 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 95 selfloop transitions, 14 changer transitions 0/114 dead transitions. [2024-06-04 15:22:04,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 114 transitions, 892 flow [2024-06-04 15:22:04,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:22:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:22:04,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-04 15:22:04,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-04 15:22:04,898 INFO L175 Difference]: Start difference. First operand has 79 places, 90 transitions, 612 flow. Second operand 6 states and 141 transitions. [2024-06-04 15:22:04,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 114 transitions, 892 flow [2024-06-04 15:22:04,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 114 transitions, 849 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 15:22:04,936 INFO L231 Difference]: Finished difference. Result has 82 places, 90 transitions, 608 flow [2024-06-04 15:22:04,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=608, PETRI_PLACES=82, PETRI_TRANSITIONS=90} [2024-06-04 15:22:04,937 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2024-06-04 15:22:04,938 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 90 transitions, 608 flow [2024-06-04 15:22:04,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:22:04,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:04,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:22:04,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 15:22:04,938 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:22:04,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:04,939 INFO L85 PathProgramCache]: Analyzing trace with hash 418683503, now seen corresponding path program 1 times [2024-06-04 15:22:04,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:04,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373414548] [2024-06-04 15:22:04,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:04,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:05,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:05,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373414548] [2024-06-04 15:22:05,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373414548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:05,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:05,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:22:05,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202358006] [2024-06-04 15:22:05,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:05,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:22:05,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:05,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:22:05,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:22:05,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:22:05,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 90 transitions, 608 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:22:05,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:05,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:22:05,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:08,023 INFO L124 PetriNetUnfolderBase]: 12558/17201 cut-off events. [2024-06-04 15:22:08,023 INFO L125 PetriNetUnfolderBase]: For 94681/94685 co-relation queries the response was YES. [2024-06-04 15:22:08,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68650 conditions, 17201 events. 12558/17201 cut-off events. For 94681/94685 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 91084 event pairs, 5109 based on Foata normal form. 29/17226 useless extension candidates. Maximal degree in co-relation 68618. Up to 15868 conditions per place. [2024-06-04 15:22:08,115 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 122 selfloop transitions, 41 changer transitions 0/168 dead transitions. [2024-06-04 15:22:08,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 168 transitions, 1428 flow [2024-06-04 15:22:08,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:22:08,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:22:08,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-04 15:22:08,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247252747252747 [2024-06-04 15:22:08,117 INFO L175 Difference]: Start difference. First operand has 82 places, 90 transitions, 608 flow. Second operand 7 states and 191 transitions. [2024-06-04 15:22:08,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 168 transitions, 1428 flow [2024-06-04 15:22:08,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 168 transitions, 1368 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 15:22:08,152 INFO L231 Difference]: Finished difference. Result has 86 places, 115 transitions, 914 flow [2024-06-04 15:22:08,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=914, PETRI_PLACES=86, PETRI_TRANSITIONS=115} [2024-06-04 15:22:08,152 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-04 15:22:08,152 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 115 transitions, 914 flow [2024-06-04 15:22:08,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:22:08,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:08,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:22:08,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 15:22:08,153 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)] === [2024-06-04 15:22:08,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:08,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1934922209, now seen corresponding path program 2 times [2024-06-04 15:22:08,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:08,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812401489] [2024-06-04 15:22:08,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:08,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:08,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:08,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812401489] [2024-06-04 15:22:08,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812401489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:08,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:08,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:22:08,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473670866] [2024-06-04 15:22:08,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:08,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:22:08,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:08,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:22:08,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:22:08,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:22:08,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 115 transitions, 914 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:22:08,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:08,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:22:08,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:10,811 INFO L124 PetriNetUnfolderBase]: 12686/17395 cut-off events. [2024-06-04 15:22:10,812 INFO L125 PetriNetUnfolderBase]: For 129703/129713 co-relation queries the response was YES. [2024-06-04 15:22:10,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80143 conditions, 17395 events. 12686/17395 cut-off events. For 129703/129713 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 92313 event pairs, 5504 based on Foata normal form. 24/17416 useless extension candidates. Maximal degree in co-relation 80107. Up to 16797 conditions per place. [2024-06-04 15:22:10,955 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 137 selfloop transitions, 30 changer transitions 0/172 dead transitions. [2024-06-04 15:22:10,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 172 transitions, 1663 flow [2024-06-04 15:22:10,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:22:10,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:22:10,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-04 15:22:10,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-06-04 15:22:10,957 INFO L175 Difference]: Start difference. First operand has 86 places, 115 transitions, 914 flow. Second operand 7 states and 180 transitions. [2024-06-04 15:22:10,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 172 transitions, 1663 flow [2024-06-04 15:22:11,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 172 transitions, 1599 flow, removed 31 selfloop flow, removed 1 redundant places. [2024-06-04 15:22:11,048 INFO L231 Difference]: Finished difference. Result has 94 places, 127 transitions, 1088 flow [2024-06-04 15:22:11,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1088, PETRI_PLACES=94, PETRI_TRANSITIONS=127} [2024-06-04 15:22:11,049 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 39 predicate places. [2024-06-04 15:22:11,049 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 127 transitions, 1088 flow [2024-06-04 15:22:11,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:22:11,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:11,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:22:11,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 15:22:11,049 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)] === [2024-06-04 15:22:11,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:11,050 INFO L85 PathProgramCache]: Analyzing trace with hash 596052173, now seen corresponding path program 3 times [2024-06-04 15:22:11,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:11,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842817520] [2024-06-04 15:22:11,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:11,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:11,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:11,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842817520] [2024-06-04 15:22:11,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842817520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:11,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:11,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:22:11,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080905108] [2024-06-04 15:22:11,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:11,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:22:11,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:11,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:22:11,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:22:11,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:22:11,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 127 transitions, 1088 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:22:11,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:11,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:22:11,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:13,719 INFO L124 PetriNetUnfolderBase]: 12752/17488 cut-off events. [2024-06-04 15:22:13,719 INFO L125 PetriNetUnfolderBase]: For 154540/154540 co-relation queries the response was YES. [2024-06-04 15:22:13,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83843 conditions, 17488 events. 12752/17488 cut-off events. For 154540/154540 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 92906 event pairs, 5536 based on Foata normal form. 14/17499 useless extension candidates. Maximal degree in co-relation 83802. Up to 17067 conditions per place. [2024-06-04 15:22:13,872 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 141 selfloop transitions, 27 changer transitions 0/173 dead transitions. [2024-06-04 15:22:13,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 173 transitions, 1705 flow [2024-06-04 15:22:13,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:22:13,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:22:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-04 15:22:13,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2024-06-04 15:22:13,877 INFO L175 Difference]: Start difference. First operand has 94 places, 127 transitions, 1088 flow. Second operand 7 states and 174 transitions. [2024-06-04 15:22:13,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 173 transitions, 1705 flow [2024-06-04 15:22:13,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 173 transitions, 1647 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-04 15:22:13,983 INFO L231 Difference]: Finished difference. Result has 101 places, 136 transitions, 1225 flow [2024-06-04 15:22:13,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1225, PETRI_PLACES=101, PETRI_TRANSITIONS=136} [2024-06-04 15:22:13,984 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-06-04 15:22:13,984 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 136 transitions, 1225 flow [2024-06-04 15:22:13,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:22:13,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:13,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:22:13,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 15:22:13,985 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)] === [2024-06-04 15:22:13,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:13,985 INFO L85 PathProgramCache]: Analyzing trace with hash 596061101, now seen corresponding path program 1 times [2024-06-04 15:22:13,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:13,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802465995] [2024-06-04 15:22:13,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:13,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:15,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:15,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802465995] [2024-06-04 15:22:15,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802465995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:15,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:15,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:22:15,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665692334] [2024-06-04 15:22:15,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:15,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:22:15,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:15,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:22:15,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:22:15,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:22:15,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 136 transitions, 1225 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) [2024-06-04 15:22:15,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:15,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:22:15,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:17,491 INFO L124 PetriNetUnfolderBase]: 12933/17746 cut-off events. [2024-06-04 15:22:17,491 INFO L125 PetriNetUnfolderBase]: For 175319/175319 co-relation queries the response was YES. [2024-06-04 15:22:17,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86930 conditions, 17746 events. 12933/17746 cut-off events. For 175319/175319 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 94552 event pairs, 5404 based on Foata normal form. 30/17773 useless extension candidates. Maximal degree in co-relation 86885. Up to 17043 conditions per place. [2024-06-04 15:22:17,641 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 145 selfloop transitions, 34 changer transitions 0/184 dead transitions. [2024-06-04 15:22:17,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 184 transitions, 1849 flow [2024-06-04 15:22:17,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:22:17,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:22:17,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 15:22:17,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49725274725274726 [2024-06-04 15:22:17,643 INFO L175 Difference]: Start difference. First operand has 101 places, 136 transitions, 1225 flow. Second operand 7 states and 181 transitions. [2024-06-04 15:22:17,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 184 transitions, 1849 flow [2024-06-04 15:22:17,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 184 transitions, 1775 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 15:22:17,749 INFO L231 Difference]: Finished difference. Result has 104 places, 139 transitions, 1278 flow [2024-06-04 15:22:17,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1278, PETRI_PLACES=104, PETRI_TRANSITIONS=139} [2024-06-04 15:22:17,750 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-04 15:22:17,750 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 139 transitions, 1278 flow [2024-06-04 15:22:17,750 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) [2024-06-04 15:22:17,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:17,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:22:17,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 15:22:17,750 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:22:17,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:17,751 INFO L85 PathProgramCache]: Analyzing trace with hash 131651903, now seen corresponding path program 1 times [2024-06-04 15:22:17,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:17,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175301288] [2024-06-04 15:22:17,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:17,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:18,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:18,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175301288] [2024-06-04 15:22:18,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175301288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:18,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:18,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:22:18,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234612313] [2024-06-04 15:22:18,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:18,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:22:18,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:18,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:22:18,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:22:18,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:22:18,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 139 transitions, 1278 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) [2024-06-04 15:22:18,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:18,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:22:18,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:20,358 INFO L124 PetriNetUnfolderBase]: 12919/17730 cut-off events. [2024-06-04 15:22:20,359 INFO L125 PetriNetUnfolderBase]: For 196007/196007 co-relation queries the response was YES. [2024-06-04 15:22:20,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89833 conditions, 17730 events. 12919/17730 cut-off events. For 196007/196007 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 94360 event pairs, 5549 based on Foata normal form. 4/17732 useless extension candidates. Maximal degree in co-relation 89787. Up to 17452 conditions per place. [2024-06-04 15:22:20,503 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 135 selfloop transitions, 13 changer transitions 0/153 dead transitions. [2024-06-04 15:22:20,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 153 transitions, 1610 flow [2024-06-04 15:22:20,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:22:20,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:22:20,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-04 15:22:20,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461538461538462 [2024-06-04 15:22:20,505 INFO L175 Difference]: Start difference. First operand has 104 places, 139 transitions, 1278 flow. Second operand 5 states and 116 transitions. [2024-06-04 15:22:20,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 153 transitions, 1610 flow [2024-06-04 15:22:20,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 153 transitions, 1489 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-04 15:22:20,600 INFO L231 Difference]: Finished difference. Result has 104 places, 139 transitions, 1195 flow [2024-06-04 15:22:20,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1195, PETRI_PLACES=104, PETRI_TRANSITIONS=139} [2024-06-04 15:22:20,600 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-04 15:22:20,600 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 139 transitions, 1195 flow [2024-06-04 15:22:20,601 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) [2024-06-04 15:22:20,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:20,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:22:20,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 15:22:20,601 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)] === [2024-06-04 15:22:20,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:20,601 INFO L85 PathProgramCache]: Analyzing trace with hash 935222398, now seen corresponding path program 1 times [2024-06-04 15:22:20,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:20,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800996197] [2024-06-04 15:22:20,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:20,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:21,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:21,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800996197] [2024-06-04 15:22:21,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800996197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:21,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:21,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:22:21,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678312189] [2024-06-04 15:22:21,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:21,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:22:21,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:21,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:22:21,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:22:21,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:22:21,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 139 transitions, 1195 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 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) [2024-06-04 15:22:21,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:21,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:22:21,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:24,275 INFO L124 PetriNetUnfolderBase]: 12941/17765 cut-off events. [2024-06-04 15:22:24,276 INFO L125 PetriNetUnfolderBase]: For 211249/211259 co-relation queries the response was YES. [2024-06-04 15:22:24,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90544 conditions, 17765 events. 12941/17765 cut-off events. For 211249/211259 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 94703 event pairs, 5435 based on Foata normal form. 13/17776 useless extension candidates. Maximal degree in co-relation 90497. Up to 17306 conditions per place. [2024-06-04 15:22:24,486 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 147 selfloop transitions, 35 changer transitions 0/187 dead transitions. [2024-06-04 15:22:24,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 187 transitions, 1859 flow [2024-06-04 15:22:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:22:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:22:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 15:22:24,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-04 15:22:24,488 INFO L175 Difference]: Start difference. First operand has 104 places, 139 transitions, 1195 flow. Second operand 7 states and 176 transitions. [2024-06-04 15:22:24,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 187 transitions, 1859 flow [2024-06-04 15:22:24,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 187 transitions, 1810 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 15:22:24,609 INFO L231 Difference]: Finished difference. Result has 107 places, 147 transitions, 1351 flow [2024-06-04 15:22:24,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1351, PETRI_PLACES=107, PETRI_TRANSITIONS=147} [2024-06-04 15:22:24,610 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-04 15:22:24,610 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 147 transitions, 1351 flow [2024-06-04 15:22:24,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 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) [2024-06-04 15:22:24,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:24,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:22:24,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 15:22:24,611 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:22:24,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:24,612 INFO L85 PathProgramCache]: Analyzing trace with hash 935312608, now seen corresponding path program 2 times [2024-06-04 15:22:24,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:24,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845024095] [2024-06-04 15:22:24,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:24,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:25,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:25,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845024095] [2024-06-04 15:22:25,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845024095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:25,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:25,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:22:25,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182357219] [2024-06-04 15:22:25,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:25,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:22:25,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:25,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:22:25,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:22:25,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:22:25,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 147 transitions, 1351 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 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) [2024-06-04 15:22:25,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:25,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:22:25,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:27,885 INFO L124 PetriNetUnfolderBase]: 12932/17751 cut-off events. [2024-06-04 15:22:27,886 INFO L125 PetriNetUnfolderBase]: For 242660/242670 co-relation queries the response was YES. [2024-06-04 15:22:27,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94326 conditions, 17751 events. 12932/17751 cut-off events. For 242660/242670 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 94568 event pairs, 5435 based on Foata normal form. 13/17762 useless extension candidates. Maximal degree in co-relation 94279. Up to 17348 conditions per place. [2024-06-04 15:22:28,026 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 147 selfloop transitions, 29 changer transitions 0/181 dead transitions. [2024-06-04 15:22:28,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 181 transitions, 1791 flow [2024-06-04 15:22:28,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:22:28,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:22:28,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 15:22:28,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-04 15:22:28,028 INFO L175 Difference]: Start difference. First operand has 107 places, 147 transitions, 1351 flow. Second operand 7 states and 170 transitions. [2024-06-04 15:22:28,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 181 transitions, 1791 flow [2024-06-04 15:22:28,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 181 transitions, 1674 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-04 15:22:28,164 INFO L231 Difference]: Finished difference. Result has 111 places, 147 transitions, 1303 flow [2024-06-04 15:22:28,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1303, PETRI_PLACES=111, PETRI_TRANSITIONS=147} [2024-06-04 15:22:28,165 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 56 predicate places. [2024-06-04 15:22:28,165 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 147 transitions, 1303 flow [2024-06-04 15:22:28,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 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) [2024-06-04 15:22:28,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:28,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:22:28,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 15:22:28,168 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)] === [2024-06-04 15:22:28,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:28,169 INFO L85 PathProgramCache]: Analyzing trace with hash 939037413, now seen corresponding path program 1 times [2024-06-04 15:22:28,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:28,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391904963] [2024-06-04 15:22:28,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:28,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:28,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:28,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391904963] [2024-06-04 15:22:28,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391904963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:28,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:28,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:22:28,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906996108] [2024-06-04 15:22:28,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:28,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:22:28,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:28,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:22:28,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:22:29,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:22:29,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 147 transitions, 1303 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 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) [2024-06-04 15:22:29,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:29,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:22:29,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:31,467 INFO L124 PetriNetUnfolderBase]: 13214/18099 cut-off events. [2024-06-04 15:22:31,468 INFO L125 PetriNetUnfolderBase]: For 266243/266251 co-relation queries the response was YES. [2024-06-04 15:22:31,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97690 conditions, 18099 events. 13214/18099 cut-off events. For 266243/266251 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 96213 event pairs, 4997 based on Foata normal form. 18/18113 useless extension candidates. Maximal degree in co-relation 97641. Up to 16423 conditions per place. [2024-06-04 15:22:31,622 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 139 selfloop transitions, 64 changer transitions 0/208 dead transitions. [2024-06-04 15:22:31,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 208 transitions, 2265 flow [2024-06-04 15:22:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:22:31,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:22:31,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-04 15:22:31,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521978021978022 [2024-06-04 15:22:31,624 INFO L175 Difference]: Start difference. First operand has 111 places, 147 transitions, 1303 flow. Second operand 7 states and 190 transitions. [2024-06-04 15:22:31,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 208 transitions, 2265 flow [2024-06-04 15:22:31,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 208 transitions, 2193 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 15:22:31,758 INFO L231 Difference]: Finished difference. Result has 114 places, 158 transitions, 1575 flow [2024-06-04 15:22:31,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1231, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1575, PETRI_PLACES=114, PETRI_TRANSITIONS=158} [2024-06-04 15:22:31,759 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 59 predicate places. [2024-06-04 15:22:31,759 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 158 transitions, 1575 flow [2024-06-04 15:22:31,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 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) [2024-06-04 15:22:31,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:31,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:22:31,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 15:22:31,760 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)] === [2024-06-04 15:22:31,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:31,760 INFO L85 PathProgramCache]: Analyzing trace with hash 939031833, now seen corresponding path program 2 times [2024-06-04 15:22:31,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:31,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193643599] [2024-06-04 15:22:31,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:31,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:32,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:32,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193643599] [2024-06-04 15:22:32,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193643599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:32,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:32,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:22:32,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367300912] [2024-06-04 15:22:32,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:32,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:22:32,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:32,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:22:32,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:22:32,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:22:32,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 158 transitions, 1575 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 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) [2024-06-04 15:22:32,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:32,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:22:32,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:34,834 INFO L124 PetriNetUnfolderBase]: 13188/18067 cut-off events. [2024-06-04 15:22:34,835 INFO L125 PetriNetUnfolderBase]: For 307633/307641 co-relation queries the response was YES. [2024-06-04 15:22:34,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102666 conditions, 18067 events. 13188/18067 cut-off events. For 307633/307641 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 95975 event pairs, 5062 based on Foata normal form. 18/18081 useless extension candidates. Maximal degree in co-relation 102614. Up to 16412 conditions per place. [2024-06-04 15:22:35,033 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 140 selfloop transitions, 68 changer transitions 0/213 dead transitions. [2024-06-04 15:22:35,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 213 transitions, 2447 flow [2024-06-04 15:22:35,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:22:35,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:22:35,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-04 15:22:35,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5302197802197802 [2024-06-04 15:22:35,042 INFO L175 Difference]: Start difference. First operand has 114 places, 158 transitions, 1575 flow. Second operand 7 states and 193 transitions. [2024-06-04 15:22:35,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 213 transitions, 2447 flow [2024-06-04 15:22:35,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 213 transitions, 2307 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-04 15:22:35,433 INFO L231 Difference]: Finished difference. Result has 120 places, 162 transitions, 1709 flow [2024-06-04 15:22:35,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1437, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1709, PETRI_PLACES=120, PETRI_TRANSITIONS=162} [2024-06-04 15:22:35,434 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2024-06-04 15:22:35,435 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 162 transitions, 1709 flow [2024-06-04 15:22:35,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 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) [2024-06-04 15:22:35,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:35,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:22:35,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 15:22:35,436 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)] === [2024-06-04 15:22:35,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:35,436 INFO L85 PathProgramCache]: Analyzing trace with hash -538334603, now seen corresponding path program 3 times [2024-06-04 15:22:35,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:35,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852356759] [2024-06-04 15:22:35,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:35,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:36,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:36,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852356759] [2024-06-04 15:22:36,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852356759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:36,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:36,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:22:36,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570583735] [2024-06-04 15:22:36,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:36,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:22:36,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:36,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:22:36,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:22:36,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:22:36,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 162 transitions, 1709 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 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) [2024-06-04 15:22:36,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:36,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:22:36,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:38,550 INFO L124 PetriNetUnfolderBase]: 13254/18167 cut-off events. [2024-06-04 15:22:38,550 INFO L125 PetriNetUnfolderBase]: For 333026/333046 co-relation queries the response was YES. [2024-06-04 15:22:38,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105469 conditions, 18167 events. 13254/18167 cut-off events. For 333026/333046 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 96825 event pairs, 5480 based on Foata normal form. 24/18181 useless extension candidates. Maximal degree in co-relation 105414. Up to 17652 conditions per place. [2024-06-04 15:22:38,725 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 169 selfloop transitions, 30 changer transitions 0/204 dead transitions. [2024-06-04 15:22:38,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 204 transitions, 2365 flow [2024-06-04 15:22:38,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:22:38,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:22:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-04 15:22:38,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-04 15:22:38,727 INFO L175 Difference]: Start difference. First operand has 120 places, 162 transitions, 1709 flow. Second operand 7 states and 175 transitions. [2024-06-04 15:22:38,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 204 transitions, 2365 flow [2024-06-04 15:22:38,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 204 transitions, 2229 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 15:22:38,982 INFO L231 Difference]: Finished difference. Result has 122 places, 167 transitions, 1741 flow [2024-06-04 15:22:38,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1583, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1741, PETRI_PLACES=122, PETRI_TRANSITIONS=167} [2024-06-04 15:22:38,983 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 67 predicate places. [2024-06-04 15:22:38,983 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 167 transitions, 1741 flow [2024-06-04 15:22:38,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 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) [2024-06-04 15:22:38,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:38,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:22:38,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 15:22:38,984 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)] === [2024-06-04 15:22:38,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:38,984 INFO L85 PathProgramCache]: Analyzing trace with hash -538067476, now seen corresponding path program 1 times [2024-06-04 15:22:38,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:38,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792548113] [2024-06-04 15:22:38,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:38,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:39,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:39,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792548113] [2024-06-04 15:22:39,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792548113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:39,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:39,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:22:39,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894407664] [2024-06-04 15:22:39,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:39,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:22:39,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:39,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:22:39,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:22:40,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:22:40,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 167 transitions, 1741 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) [2024-06-04 15:22:40,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:40,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:22:40,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:43,041 INFO L124 PetriNetUnfolderBase]: 13287/18219 cut-off events. [2024-06-04 15:22:43,041 INFO L125 PetriNetUnfolderBase]: For 358708/358708 co-relation queries the response was YES. [2024-06-04 15:22:43,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106035 conditions, 18219 events. 13287/18219 cut-off events. For 358708/358708 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 97097 event pairs, 5445 based on Foata normal form. 7/18223 useless extension candidates. Maximal degree in co-relation 105980. Up to 17725 conditions per place. [2024-06-04 15:22:43,390 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 171 selfloop transitions, 39 changer transitions 0/215 dead transitions. [2024-06-04 15:22:43,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 215 transitions, 2465 flow [2024-06-04 15:22:43,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:22:43,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:22:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-04 15:22:43,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2024-06-04 15:22:43,394 INFO L175 Difference]: Start difference. First operand has 122 places, 167 transitions, 1741 flow. Second operand 7 states and 174 transitions. [2024-06-04 15:22:43,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 215 transitions, 2465 flow [2024-06-04 15:22:43,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 215 transitions, 2373 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-04 15:22:43,588 INFO L231 Difference]: Finished difference. Result has 126 places, 180 transitions, 1933 flow [2024-06-04 15:22:43,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1649, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1933, PETRI_PLACES=126, PETRI_TRANSITIONS=180} [2024-06-04 15:22:43,589 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-04 15:22:43,589 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 180 transitions, 1933 flow [2024-06-04 15:22:43,589 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) [2024-06-04 15:22:43,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:43,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:22:43,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 15:22:43,592 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:22:43,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:43,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1072936290, now seen corresponding path program 1 times [2024-06-04 15:22:43,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:43,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650514405] [2024-06-04 15:22:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:43,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:44,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:44,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650514405] [2024-06-04 15:22:44,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650514405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:44,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:44,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:22:44,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114135273] [2024-06-04 15:22:44,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:44,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:22:44,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:44,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:22:44,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:22:44,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:22:44,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 180 transitions, 1933 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) [2024-06-04 15:22:44,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:44,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:22:44,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:47,265 INFO L124 PetriNetUnfolderBase]: 13323/18278 cut-off events. [2024-06-04 15:22:47,266 INFO L125 PetriNetUnfolderBase]: For 400968/400978 co-relation queries the response was YES. [2024-06-04 15:22:47,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113007 conditions, 18278 events. 13323/18278 cut-off events. For 400968/400978 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 97671 event pairs, 4574 based on Foata normal form. 16/18292 useless extension candidates. Maximal degree in co-relation 112949. Up to 17668 conditions per place. [2024-06-04 15:22:47,436 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 186 selfloop transitions, 44 changer transitions 0/235 dead transitions. [2024-06-04 15:22:47,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 235 transitions, 2775 flow [2024-06-04 15:22:47,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:22:47,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:22:47,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 15:22:47,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-06-04 15:22:47,438 INFO L175 Difference]: Start difference. First operand has 126 places, 180 transitions, 1933 flow. Second operand 8 states and 199 transitions. [2024-06-04 15:22:47,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 235 transitions, 2775 flow [2024-06-04 15:22:47,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 235 transitions, 2683 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-04 15:22:47,946 INFO L231 Difference]: Finished difference. Result has 131 places, 186 transitions, 2085 flow [2024-06-04 15:22:47,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1841, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2085, PETRI_PLACES=131, PETRI_TRANSITIONS=186} [2024-06-04 15:22:47,947 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 76 predicate places. [2024-06-04 15:22:47,947 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 186 transitions, 2085 flow [2024-06-04 15:22:47,947 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) [2024-06-04 15:22:47,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:47,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:22:47,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 15:22:47,947 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:22:47,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:47,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1490318096, now seen corresponding path program 1 times [2024-06-04 15:22:47,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:47,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697877785] [2024-06-04 15:22:47,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:47,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:48,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:48,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697877785] [2024-06-04 15:22:48,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697877785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:48,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:48,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:22:48,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886874254] [2024-06-04 15:22:48,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:48,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:22:48,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:48,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:22:48,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:22:49,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:22:49,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 186 transitions, 2085 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) [2024-06-04 15:22:49,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:49,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:22:49,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:51,846 INFO L124 PetriNetUnfolderBase]: 13735/18827 cut-off events. [2024-06-04 15:22:51,847 INFO L125 PetriNetUnfolderBase]: For 453242/453250 co-relation queries the response was YES. [2024-06-04 15:22:52,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119373 conditions, 18827 events. 13735/18827 cut-off events. For 453242/453250 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 101037 event pairs, 4686 based on Foata normal form. 18/18841 useless extension candidates. Maximal degree in co-relation 119314. Up to 16401 conditions per place. [2024-06-04 15:22:52,234 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 178 selfloop transitions, 81 changer transitions 0/264 dead transitions. [2024-06-04 15:22:52,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 264 transitions, 3417 flow [2024-06-04 15:22:52,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:22:52,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:22:52,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-04 15:22:52,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-04 15:22:52,237 INFO L175 Difference]: Start difference. First operand has 131 places, 186 transitions, 2085 flow. Second operand 8 states and 221 transitions. [2024-06-04 15:22:52,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 264 transitions, 3417 flow [2024-06-04 15:22:52,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 264 transitions, 3290 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-04 15:22:52,590 INFO L231 Difference]: Finished difference. Result has 137 places, 201 transitions, 2382 flow [2024-06-04 15:22:52,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1958, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2382, PETRI_PLACES=137, PETRI_TRANSITIONS=201} [2024-06-04 15:22:52,591 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 82 predicate places. [2024-06-04 15:22:52,591 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 201 transitions, 2382 flow [2024-06-04 15:22:52,591 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) [2024-06-04 15:22:52,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:52,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:22:52,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 15:22:52,592 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:22:52,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:52,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1072875840, now seen corresponding path program 2 times [2024-06-04 15:22:52,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:52,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892470820] [2024-06-04 15:22:52,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:52,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:53,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:53,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892470820] [2024-06-04 15:22:53,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892470820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:53,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:53,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:22:53,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784079219] [2024-06-04 15:22:53,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:53,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:22:53,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:53,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:22:53,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:22:53,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:22:53,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 201 transitions, 2382 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) [2024-06-04 15:22:53,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:53,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:22:53,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:56,429 INFO L124 PetriNetUnfolderBase]: 13771/18917 cut-off events. [2024-06-04 15:22:56,430 INFO L125 PetriNetUnfolderBase]: For 514098/514108 co-relation queries the response was YES. [2024-06-04 15:22:56,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126795 conditions, 18917 events. 13771/18917 cut-off events. For 514098/514108 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 102089 event pairs, 5220 based on Foata normal form. 16/18931 useless extension candidates. Maximal degree in co-relation 126732. Up to 18391 conditions per place. [2024-06-04 15:22:56,625 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 206 selfloop transitions, 38 changer transitions 0/249 dead transitions. [2024-06-04 15:22:56,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 249 transitions, 3038 flow [2024-06-04 15:22:56,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:22:56,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:22:56,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 15:22:56,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-04 15:22:56,627 INFO L175 Difference]: Start difference. First operand has 137 places, 201 transitions, 2382 flow. Second operand 8 states and 195 transitions. [2024-06-04 15:22:56,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 249 transitions, 3038 flow [2024-06-04 15:22:57,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 249 transitions, 2866 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-04 15:22:57,199 INFO L231 Difference]: Finished difference. Result has 142 places, 204 transitions, 2354 flow [2024-06-04 15:22:57,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2210, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2354, PETRI_PLACES=142, PETRI_TRANSITIONS=204} [2024-06-04 15:22:57,200 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 87 predicate places. [2024-06-04 15:22:57,200 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 204 transitions, 2354 flow [2024-06-04 15:22:57,200 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) [2024-06-04 15:22:57,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:57,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:22:57,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 15:22:57,200 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:22:57,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:57,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1070074556, now seen corresponding path program 2 times [2024-06-04 15:22:57,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:57,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109928194] [2024-06-04 15:22:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:57,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:58,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:58,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109928194] [2024-06-04 15:22:58,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109928194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:58,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:58,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:22:58,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121963846] [2024-06-04 15:22:58,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:58,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:22:58,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:58,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:22:58,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:22:58,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:22:58,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 204 transitions, 2354 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) [2024-06-04 15:22:58,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:58,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:22:58,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:23:01,585 INFO L124 PetriNetUnfolderBase]: 14079/19298 cut-off events. [2024-06-04 15:23:01,585 INFO L125 PetriNetUnfolderBase]: For 547001/547013 co-relation queries the response was YES. [2024-06-04 15:23:01,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130231 conditions, 19298 events. 14079/19298 cut-off events. For 547001/547013 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 104105 event pairs, 4752 based on Foata normal form. 26/19320 useless extension candidates. Maximal degree in co-relation 130166. Up to 16926 conditions per place. [2024-06-04 15:23:01,819 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 178 selfloop transitions, 107 changer transitions 0/290 dead transitions. [2024-06-04 15:23:01,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 290 transitions, 3930 flow [2024-06-04 15:23:01,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:23:01,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:23:01,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-04 15:23:01,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288461538461539 [2024-06-04 15:23:01,821 INFO L175 Difference]: Start difference. First operand has 142 places, 204 transitions, 2354 flow. Second operand 8 states and 220 transitions. [2024-06-04 15:23:01,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 290 transitions, 3930 flow [2024-06-04 15:23:02,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 290 transitions, 3818 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 15:23:02,416 INFO L231 Difference]: Finished difference. Result has 147 places, 228 transitions, 2942 flow [2024-06-04 15:23:02,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2942, PETRI_PLACES=147, PETRI_TRANSITIONS=228} [2024-06-04 15:23:02,416 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2024-06-04 15:23:02,417 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 228 transitions, 2942 flow [2024-06-04 15:23:02,417 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) [2024-06-04 15:23:02,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:23:02,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:23:02,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 15:23:02,417 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)] === [2024-06-04 15:23:02,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:23:02,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1070079330, now seen corresponding path program 3 times [2024-06-04 15:23:02,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:23:02,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860042239] [2024-06-04 15:23:02,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:23:02,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:23:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:23:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:23:03,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:23:03,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860042239] [2024-06-04 15:23:03,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860042239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:23:03,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:23:03,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:23:03,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233693332] [2024-06-04 15:23:03,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:23:03,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:23:03,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:23:03,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:23:03,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:23:03,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:23:03,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 228 transitions, 2942 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) [2024-06-04 15:23:03,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:23:03,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:23:03,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:23:06,995 INFO L124 PetriNetUnfolderBase]: 14064/19294 cut-off events. [2024-06-04 15:23:06,995 INFO L125 PetriNetUnfolderBase]: For 618535/618545 co-relation queries the response was YES. [2024-06-04 15:23:07,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140516 conditions, 19294 events. 14064/19294 cut-off events. For 618535/618545 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 104277 event pairs, 5143 based on Foata normal form. 16/19308 useless extension candidates. Maximal degree in co-relation 140447. Up to 18829 conditions per place. [2024-06-04 15:23:07,213 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 233 selfloop transitions, 32 changer transitions 0/270 dead transitions. [2024-06-04 15:23:07,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 270 transitions, 3580 flow [2024-06-04 15:23:07,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:23:07,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:23:07,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 15:23:07,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-04 15:23:07,215 INFO L175 Difference]: Start difference. First operand has 147 places, 228 transitions, 2942 flow. Second operand 8 states and 192 transitions. [2024-06-04 15:23:07,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 270 transitions, 3580 flow [2024-06-04 15:23:07,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 270 transitions, 3378 flow, removed 86 selfloop flow, removed 2 redundant places. [2024-06-04 15:23:07,822 INFO L231 Difference]: Finished difference. Result has 153 places, 228 transitions, 2814 flow [2024-06-04 15:23:07,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2740, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2814, PETRI_PLACES=153, PETRI_TRANSITIONS=228} [2024-06-04 15:23:07,823 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 98 predicate places. [2024-06-04 15:23:07,823 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 228 transitions, 2814 flow [2024-06-04 15:23:07,823 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) [2024-06-04 15:23:07,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:23:07,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:23:07,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 15:23:07,824 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)] === [2024-06-04 15:23:07,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:23:07,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1070079206, now seen corresponding path program 3 times [2024-06-04 15:23:07,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:23:07,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360538907] [2024-06-04 15:23:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:23:07,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:23:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:23:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:23:08,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:23:08,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360538907] [2024-06-04 15:23:08,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360538907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:23:08,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:23:08,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:23:08,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499771350] [2024-06-04 15:23:08,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:23:08,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:23:08,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:23:08,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:23:08,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:23:09,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-04 15:23:09,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 228 transitions, 2814 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) [2024-06-04 15:23:09,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:23:09,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-04 15:23:09,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand