./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:32:56,873 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:32:56,936 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:32:56,940 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:32:56,940 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:32:56,963 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:32:56,964 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:32:56,965 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:32:56,965 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:32:56,968 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:32:56,969 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:32:56,969 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:32:56,970 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:32:56,971 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:32:56,971 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:32:56,971 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:32:56,971 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:32:56,971 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:32:56,972 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:32:56,972 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:32:56,972 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:32:56,972 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:32:56,973 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:32:56,973 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:32:56,973 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:32:56,973 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:32:56,973 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:32:56,974 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:32:56,974 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:32:56,974 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:32:56,974 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:32:56,975 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:32:56,975 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:32:56,975 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:32:56,975 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:32:56,976 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:32:56,976 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:32:56,976 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:32:56,976 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:32:56,976 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:32:56,976 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:32:56,977 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:32:56,977 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:32:56,977 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:32:57,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:32:57,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:32:57,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:32:57,196 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:32:57,197 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:32:57,198 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-20 16:32:58,235 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:32:58,399 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:32:58,399 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-20 16:32:58,424 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7faa80b5/446eb4a2b9444c14955d764cd8a102f1/FLAGa3dcd0bab [2024-06-20 16:32:58,433 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7faa80b5/446eb4a2b9444c14955d764cd8a102f1 [2024-06-20 16:32:58,435 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:32:58,436 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:32:58,436 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-20 16:32:58,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:32:58,605 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:32:58,607 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:32:58,607 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:32:58,611 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:32:58,612 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:32:58" (1/2) ... [2024-06-20 16:32:58,612 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a97dc23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:32:58, skipping insertion in model container [2024-06-20 16:32:58,613 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:32:58" (1/2) ... [2024-06-20 16:32:58,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5c5d8016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:32:58, skipping insertion in model container [2024-06-20 16:32:58,614 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:32:58" (2/2) ... [2024-06-20 16:32:58,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a97dc23 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:58, skipping insertion in model container [2024-06-20 16:32:58,614 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:32:58" (2/2) ... [2024-06-20 16:32:58,614 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:32:58,718 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:32:58,720 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] (((((((((((((((((((! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0) [2024-06-20 16:32:58,720 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0) [2024-06-20 16:32:58,720 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((((! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0) [2024-06-20 16:32:58,720 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((((! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0) [2024-06-20 16:32:58,720 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:32:58,721 INFO L106 edCorrectnessWitness]: ghost_update [L835-L835] multithreaded = 1; [2024-06-20 16:32:58,758 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:32:59,013 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:32:59,020 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:32:59,157 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:32:59,194 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:32:59,195 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:59 WrapperNode [2024-06-20 16:32:59,195 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:32:59,196 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:32:59,196 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:32:59,196 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:32:59,201 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:59" (1/1) ... [2024-06-20 16:32:59,218 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:59" (1/1) ... [2024-06-20 16:32:59,246 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 155 [2024-06-20 16:32:59,246 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:32:59,247 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:32:59,247 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:32:59,247 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:32:59,255 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:59" (1/1) ... [2024-06-20 16:32:59,256 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:59" (1/1) ... [2024-06-20 16:32:59,258 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:59" (1/1) ... [2024-06-20 16:32:59,276 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]. [2024-06-20 16:32:59,276 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:59" (1/1) ... [2024-06-20 16:32:59,276 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:59" (1/1) ... [2024-06-20 16:32:59,283 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:59" (1/1) ... [2024-06-20 16:32:59,285 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:59" (1/1) ... [2024-06-20 16:32:59,286 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:59" (1/1) ... [2024-06-20 16:32:59,288 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:59" (1/1) ... [2024-06-20 16:32:59,311 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:32:59,312 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:32:59,312 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:32:59,312 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:32:59,313 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:59" (1/1) ... [2024-06-20 16:32:59,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:32:59,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:32:59,336 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) [2024-06-20 16:32:59,356 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 [2024-06-20 16:32:59,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:32:59,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:32:59,373 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:32:59,373 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:32:59,373 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:32:59,374 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:32:59,374 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:32:59,374 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:32:59,374 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 16:32:59,374 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 16:32:59,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:32:59,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:32:59,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:32:59,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:32:59,377 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:32:59,490 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:32:59,492 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:32:59,902 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:32:59,903 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:33:00,056 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:33:00,056 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:33:00,056 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:33:00 BoogieIcfgContainer [2024-06-20 16:33:00,057 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:33:00,059 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:33:00,059 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:33:00,062 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:33:00,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:32:58" (1/4) ... [2024-06-20 16:33:00,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729642b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:33:00, skipping insertion in model container [2024-06-20 16:33:00,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:32:58" (2/4) ... [2024-06-20 16:33:00,063 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729642b4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:33:00, skipping insertion in model container [2024-06-20 16:33:00,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:59" (3/4) ... [2024-06-20 16:33:00,063 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729642b4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:33:00, skipping insertion in model container [2024-06-20 16:33:00,064 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:33:00" (4/4) ... [2024-06-20 16:33:00,065 INFO L112 eAbstractionObserver]: Analyzing ICFG mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-20 16:33:00,093 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:33:00,094 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 16:33:00,094 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:33:00,142 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:33:00,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-20 16:33:00,207 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-20 16:33:00,207 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:33:00,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:33:00,209 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-20 16:33:00,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-20 16:33:00,221 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:33:00,228 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;@c6187ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:33:00,229 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 16:33:00,233 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:33:00,233 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-20 16:33:00,233 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:33:00,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:00,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:33:00,235 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)] === [2024-06-20 16:33:00,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:00,261 INFO L85 PathProgramCache]: Analyzing trace with hash 375576810, now seen corresponding path program 1 times [2024-06-20 16:33:00,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:00,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344302284] [2024-06-20 16:33:00,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:00,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:01,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:01,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344302284] [2024-06-20 16:33:01,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344302284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:01,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:01,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:33:01,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837889308] [2024-06-20 16:33:01,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:01,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:33:01,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:01,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:33:01,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:33:01,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-20 16:33:01,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:01,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:01,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-20 16:33:01,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:02,620 INFO L124 PetriNetUnfolderBase]: 8152/11425 cut-off events. [2024-06-20 16:33:02,620 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-06-20 16:33:02,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22912 conditions, 11425 events. 8152/11425 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 62217 event pairs, 6174 based on Foata normal form. 1/11241 useless extension candidates. Maximal degree in co-relation 22899. Up to 11108 conditions per place. [2024-06-20 16:33:02,680 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 42 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-20 16:33:02,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 225 flow [2024-06-20 16:33:02,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:33:02,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:33:02,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-20 16:33:02,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-06-20 16:33:02,691 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 93 transitions. [2024-06-20 16:33:02,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 225 flow [2024-06-20 16:33:02,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 218 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:02,698 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-20 16:33:02,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-20 16:33:02,702 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-20 16:33:02,702 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-20 16:33:02,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:02,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:02,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:02,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:33:02,703 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)] === [2024-06-20 16:33:02,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:02,704 INFO L85 PathProgramCache]: Analyzing trace with hash 152353751, now seen corresponding path program 1 times [2024-06-20 16:33:02,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:02,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482684293] [2024-06-20 16:33:02,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:02,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:03,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:03,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482684293] [2024-06-20 16:33:03,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482684293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:03,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:03,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:33:03,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826374871] [2024-06-20 16:33:03,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:03,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:33:03,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:03,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:33:03,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:33:03,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:33:03,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:03,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:03,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:33:03,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:04,736 INFO L124 PetriNetUnfolderBase]: 9537/13006 cut-off events. [2024-06-20 16:33:04,737 INFO L125 PetriNetUnfolderBase]: For 2493/2493 co-relation queries the response was YES. [2024-06-20 16:33:04,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29769 conditions, 13006 events. 9537/13006 cut-off events. For 2493/2493 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 68184 event pairs, 6489 based on Foata normal form. 4/13003 useless extension candidates. Maximal degree in co-relation 29757. Up to 12918 conditions per place. [2024-06-20 16:33:04,798 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 53 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-20 16:33:04,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 319 flow [2024-06-20 16:33:04,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:33:04,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:33:04,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-06-20 16:33:04,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5784313725490197 [2024-06-20 16:33:04,800 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 118 transitions. [2024-06-20 16:33:04,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 319 flow [2024-06-20 16:33:04,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:33:04,802 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 177 flow [2024-06-20 16:33:04,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-20 16:33:04,803 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-06-20 16:33:04,803 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 177 flow [2024-06-20 16:33:04,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:04,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:04,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:04,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:33:04,804 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)] === [2024-06-20 16:33:04,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:04,804 INFO L85 PathProgramCache]: Analyzing trace with hash 428000069, now seen corresponding path program 1 times [2024-06-20 16:33:04,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:04,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325550711] [2024-06-20 16:33:04,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:04,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:05,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:05,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325550711] [2024-06-20 16:33:05,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325550711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:05,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:05,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:33:05,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951104690] [2024-06-20 16:33:05,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:05,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:33:05,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:05,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:33:05,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:33:05,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:33:05,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:05,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:05,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:33:05,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:06,772 INFO L124 PetriNetUnfolderBase]: 9555/13087 cut-off events. [2024-06-20 16:33:06,772 INFO L125 PetriNetUnfolderBase]: For 7234/7234 co-relation queries the response was YES. [2024-06-20 16:33:06,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33312 conditions, 13087 events. 9555/13087 cut-off events. For 7234/7234 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 69174 event pairs, 5076 based on Foata normal form. 7/13091 useless extension candidates. Maximal degree in co-relation 33298. Up to 12839 conditions per place. [2024-06-20 16:33:06,829 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 71 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-20 16:33:06,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 99 transitions, 535 flow [2024-06-20 16:33:06,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:33:06,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:33:06,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-20 16:33:06,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-06-20 16:33:06,834 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 177 flow. Second operand 5 states and 155 transitions. [2024-06-20 16:33:06,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 99 transitions, 535 flow [2024-06-20 16:33:06,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 516 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 16:33:06,839 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 308 flow [2024-06-20 16:33:06,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-06-20 16:33:06,840 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-20 16:33:06,840 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 308 flow [2024-06-20 16:33:06,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:06,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:06,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:06,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:33:06,842 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)] === [2024-06-20 16:33:06,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:06,842 INFO L85 PathProgramCache]: Analyzing trace with hash -148694574, now seen corresponding path program 1 times [2024-06-20 16:33:06,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:06,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923356] [2024-06-20 16:33:06,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:06,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:07,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:07,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923356] [2024-06-20 16:33:07,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:07,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:07,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:33:07,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539433098] [2024-06-20 16:33:07,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:07,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:33:07,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:07,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:33:07,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:33:07,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:33:07,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:07,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:07,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:33:07,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:08,826 INFO L124 PetriNetUnfolderBase]: 9584/13130 cut-off events. [2024-06-20 16:33:08,827 INFO L125 PetriNetUnfolderBase]: For 17340/17345 co-relation queries the response was YES. [2024-06-20 16:33:08,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39031 conditions, 13130 events. 9584/13130 cut-off events. For 17340/17345 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 69441 event pairs, 4111 based on Foata normal form. 18/13145 useless extension candidates. Maximal degree in co-relation 39014. Up to 12804 conditions per place. [2024-06-20 16:33:08,904 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 78 selfloop transitions, 25 changer transitions 0/110 dead transitions. [2024-06-20 16:33:08,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 110 transitions, 680 flow [2024-06-20 16:33:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:33:08,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:33:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-20 16:33:08,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5849673202614379 [2024-06-20 16:33:08,906 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 308 flow. Second operand 6 states and 179 transitions. [2024-06-20 16:33:08,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 110 transitions, 680 flow [2024-06-20 16:33:08,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 110 transitions, 668 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-20 16:33:08,915 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 385 flow [2024-06-20 16:33:08,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-20 16:33:08,916 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2024-06-20 16:33:08,916 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 385 flow [2024-06-20 16:33:08,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:08,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:08,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:08,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:33:08,917 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:33:08,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:08,918 INFO L85 PathProgramCache]: Analyzing trace with hash -697143758, now seen corresponding path program 1 times [2024-06-20 16:33:08,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:08,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619188707] [2024-06-20 16:33:08,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:08,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:09,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:09,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619188707] [2024-06-20 16:33:09,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619188707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:09,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:09,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:33:09,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286633071] [2024-06-20 16:33:09,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:09,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:33:09,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:09,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:33:09,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:33:09,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:33:09,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 385 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) [2024-06-20 16:33:09,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:09,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:33:09,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:10,806 INFO L124 PetriNetUnfolderBase]: 8180/11488 cut-off events. [2024-06-20 16:33:10,807 INFO L125 PetriNetUnfolderBase]: For 22164/22164 co-relation queries the response was YES. [2024-06-20 16:33:10,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37134 conditions, 11488 events. 8180/11488 cut-off events. For 22164/22164 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 63023 event pairs, 4129 based on Foata normal form. 3/11489 useless extension candidates. Maximal degree in co-relation 37113. Up to 11135 conditions per place. [2024-06-20 16:33:10,864 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 66 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-06-20 16:33:10,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 581 flow [2024-06-20 16:33:10,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:33:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:33:10,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-20 16:33:10,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4745098039215686 [2024-06-20 16:33:10,866 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 385 flow. Second operand 5 states and 121 transitions. [2024-06-20 16:33:10,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 581 flow [2024-06-20 16:33:10,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 512 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:10,876 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 347 flow [2024-06-20 16:33:10,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-20 16:33:10,883 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2024-06-20 16:33:10,883 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 347 flow [2024-06-20 16:33:10,883 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) [2024-06-20 16:33:10,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:10,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:10,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:33:10,884 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)] === [2024-06-20 16:33:10,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:10,885 INFO L85 PathProgramCache]: Analyzing trace with hash -159711428, now seen corresponding path program 1 times [2024-06-20 16:33:10,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:10,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720678248] [2024-06-20 16:33:10,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:10,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:11,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:11,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720678248] [2024-06-20 16:33:11,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720678248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:11,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:11,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:33:11,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091274502] [2024-06-20 16:33:11,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:11,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:33:11,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:11,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:33:11,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:33:11,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:33:11,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 347 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) [2024-06-20 16:33:11,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:11,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:33:11,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:12,974 INFO L124 PetriNetUnfolderBase]: 8192/11545 cut-off events. [2024-06-20 16:33:12,975 INFO L125 PetriNetUnfolderBase]: For 25442/25442 co-relation queries the response was YES. [2024-06-20 16:33:12,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37773 conditions, 11545 events. 8192/11545 cut-off events. For 25442/25442 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63333 event pairs, 3950 based on Foata normal form. 5/11544 useless extension candidates. Maximal degree in co-relation 37750. Up to 11085 conditions per place. [2024-06-20 16:33:13,041 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 79 selfloop transitions, 22 changer transitions 0/108 dead transitions. [2024-06-20 16:33:13,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 108 transitions, 743 flow [2024-06-20 16:33:13,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:33:13,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:33:13,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 16:33:13,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49673202614379086 [2024-06-20 16:33:13,043 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 347 flow. Second operand 6 states and 152 transitions. [2024-06-20 16:33:13,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 108 transitions, 743 flow [2024-06-20 16:33:13,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 108 transitions, 714 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:13,057 INFO L231 Difference]: Finished difference. Result has 71 places, 80 transitions, 492 flow [2024-06-20 16:33:13,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=492, PETRI_PLACES=71, PETRI_TRANSITIONS=80} [2024-06-20 16:33:13,060 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2024-06-20 16:33:13,061 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 80 transitions, 492 flow [2024-06-20 16:33:13,061 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) [2024-06-20 16:33:13,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:13,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:13,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:33:13,061 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)] === [2024-06-20 16:33:13,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:13,062 INFO L85 PathProgramCache]: Analyzing trace with hash 483442845, now seen corresponding path program 1 times [2024-06-20 16:33:13,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:13,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613656250] [2024-06-20 16:33:13,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:13,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:13,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:13,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613656250] [2024-06-20 16:33:13,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613656250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:13,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:13,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:33:13,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555723544] [2024-06-20 16:33:13,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:13,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:33:13,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:13,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:33:13,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:33:13,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:13,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 492 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:13,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:13,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:13,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:15,275 INFO L124 PetriNetUnfolderBase]: 9600/13120 cut-off events. [2024-06-20 16:33:15,275 INFO L125 PetriNetUnfolderBase]: For 45763/45773 co-relation queries the response was YES. [2024-06-20 16:33:15,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48573 conditions, 13120 events. 9600/13120 cut-off events. For 45763/45773 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 68824 event pairs, 4758 based on Foata normal form. 14/13131 useless extension candidates. Maximal degree in co-relation 48548. Up to 12898 conditions per place. [2024-06-20 16:33:15,339 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 83 selfloop transitions, 25 changer transitions 0/114 dead transitions. [2024-06-20 16:33:15,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 114 transitions, 851 flow [2024-06-20 16:33:15,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:33:15,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:33:15,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 16:33:15,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869281045751634 [2024-06-20 16:33:15,341 INFO L175 Difference]: Start difference. First operand has 71 places, 80 transitions, 492 flow. Second operand 6 states and 149 transitions. [2024-06-20 16:33:15,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 114 transitions, 851 flow [2024-06-20 16:33:15,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 114 transitions, 827 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-20 16:33:15,364 INFO L231 Difference]: Finished difference. Result has 76 places, 84 transitions, 564 flow [2024-06-20 16:33:15,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=564, PETRI_PLACES=76, PETRI_TRANSITIONS=84} [2024-06-20 16:33:15,365 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 22 predicate places. [2024-06-20 16:33:15,365 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 84 transitions, 564 flow [2024-06-20 16:33:15,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:15,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:15,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:15,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:33:15,365 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)] === [2024-06-20 16:33:15,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:15,366 INFO L85 PathProgramCache]: Analyzing trace with hash 59784273, now seen corresponding path program 2 times [2024-06-20 16:33:15,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:15,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632502186] [2024-06-20 16:33:15,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:15,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:16,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:16,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632502186] [2024-06-20 16:33:16,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632502186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:16,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:16,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:33:16,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524267041] [2024-06-20 16:33:16,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:16,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:33:16,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:16,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:33:16,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:33:16,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:16,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 84 transitions, 564 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:16,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:16,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:16,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:17,521 INFO L124 PetriNetUnfolderBase]: 9576/13072 cut-off events. [2024-06-20 16:33:17,521 INFO L125 PetriNetUnfolderBase]: For 51024/51024 co-relation queries the response was YES. [2024-06-20 16:33:17,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48986 conditions, 13072 events. 9576/13072 cut-off events. For 51024/51024 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 68447 event pairs, 4778 based on Foata normal form. 3/13067 useless extension candidates. Maximal degree in co-relation 48958. Up to 12868 conditions per place. [2024-06-20 16:33:17,588 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 76 selfloop transitions, 26 changer transitions 0/108 dead transitions. [2024-06-20 16:33:17,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 108 transitions, 830 flow [2024-06-20 16:33:17,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:33:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:33:17,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-20 16:33:17,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-20 16:33:17,590 INFO L175 Difference]: Start difference. First operand has 76 places, 84 transitions, 564 flow. Second operand 6 states and 144 transitions. [2024-06-20 16:33:17,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 108 transitions, 830 flow [2024-06-20 16:33:17,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 108 transitions, 787 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:33:17,614 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 584 flow [2024-06-20 16:33:17,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=584, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-20 16:33:17,615 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 25 predicate places. [2024-06-20 16:33:17,615 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 584 flow [2024-06-20 16:33:17,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:17,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:17,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:17,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:33:17,616 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)] === [2024-06-20 16:33:17,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:17,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1461043215, now seen corresponding path program 1 times [2024-06-20 16:33:17,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:17,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528200985] [2024-06-20 16:33:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:17,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:17,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:18,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:18,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528200985] [2024-06-20 16:33:18,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528200985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:18,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:18,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:18,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239805110] [2024-06-20 16:33:18,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:18,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:18,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:18,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:18,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:18,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:18,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 584 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:18,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:18,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:18,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:19,818 INFO L124 PetriNetUnfolderBase]: 10114/13851 cut-off events. [2024-06-20 16:33:19,818 INFO L125 PetriNetUnfolderBase]: For 65313/65321 co-relation queries the response was YES. [2024-06-20 16:33:19,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53367 conditions, 13851 events. 10114/13851 cut-off events. For 65313/65321 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 74157 event pairs, 4210 based on Foata normal form. 13/13860 useless extension candidates. Maximal degree in co-relation 53338. Up to 12889 conditions per place. [2024-06-20 16:33:19,918 INFO L140 encePairwiseOnDemand]: 34/51 looper letters, 122 selfloop transitions, 59 changer transitions 0/187 dead transitions. [2024-06-20 16:33:19,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 187 transitions, 1660 flow [2024-06-20 16:33:19,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:19,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:19,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-20 16:33:19,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5220588235294118 [2024-06-20 16:33:19,919 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 584 flow. Second operand 8 states and 213 transitions. [2024-06-20 16:33:19,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 187 transitions, 1660 flow [2024-06-20 16:33:19,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 187 transitions, 1497 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:19,961 INFO L231 Difference]: Finished difference. Result has 84 places, 120 transitions, 935 flow [2024-06-20 16:33:19,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=935, PETRI_PLACES=84, PETRI_TRANSITIONS=120} [2024-06-20 16:33:19,962 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2024-06-20 16:33:19,962 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 120 transitions, 935 flow [2024-06-20 16:33:19,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:19,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:19,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:19,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:33:19,963 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)] === [2024-06-20 16:33:19,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:19,963 INFO L85 PathProgramCache]: Analyzing trace with hash 958809213, now seen corresponding path program 2 times [2024-06-20 16:33:19,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:19,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675864065] [2024-06-20 16:33:19,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:19,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:20,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:20,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675864065] [2024-06-20 16:33:20,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675864065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:20,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:20,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:20,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712914320] [2024-06-20 16:33:20,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:20,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:20,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:20,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:20,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:20,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:20,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 120 transitions, 935 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:20,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:20,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:20,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:22,869 INFO L124 PetriNetUnfolderBase]: 10462/14372 cut-off events. [2024-06-20 16:33:22,869 INFO L125 PetriNetUnfolderBase]: For 93880/93894 co-relation queries the response was YES. [2024-06-20 16:33:22,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63519 conditions, 14372 events. 10462/14372 cut-off events. For 93880/93894 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 77183 event pairs, 4347 based on Foata normal form. 25/14393 useless extension candidates. Maximal degree in co-relation 63486. Up to 13157 conditions per place. [2024-06-20 16:33:22,997 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 101 selfloop transitions, 81 changer transitions 0/188 dead transitions. [2024-06-20 16:33:22,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 188 transitions, 1803 flow [2024-06-20 16:33:22,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:22,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:22,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-20 16:33:22,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126050420168067 [2024-06-20 16:33:22,999 INFO L175 Difference]: Start difference. First operand has 84 places, 120 transitions, 935 flow. Second operand 7 states and 183 transitions. [2024-06-20 16:33:22,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 188 transitions, 1803 flow [2024-06-20 16:33:23,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 188 transitions, 1709 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-20 16:33:23,092 INFO L231 Difference]: Finished difference. Result has 91 places, 141 transitions, 1308 flow [2024-06-20 16:33:23,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1308, PETRI_PLACES=91, PETRI_TRANSITIONS=141} [2024-06-20 16:33:23,092 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 37 predicate places. [2024-06-20 16:33:23,093 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 141 transitions, 1308 flow [2024-06-20 16:33:23,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:23,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:23,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:23,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:33:23,093 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)] === [2024-06-20 16:33:23,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:23,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1472620209, now seen corresponding path program 3 times [2024-06-20 16:33:23,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:23,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630028779] [2024-06-20 16:33:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:23,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:23,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:23,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630028779] [2024-06-20 16:33:23,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630028779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:23,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:23,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:23,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779352311] [2024-06-20 16:33:23,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:23,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:23,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:23,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:23,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:24,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:24,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 141 transitions, 1308 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:24,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:24,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:24,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:25,786 INFO L124 PetriNetUnfolderBase]: 10544/14484 cut-off events. [2024-06-20 16:33:25,786 INFO L125 PetriNetUnfolderBase]: For 123345/123351 co-relation queries the response was YES. [2024-06-20 16:33:25,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69990 conditions, 14484 events. 10544/14484 cut-off events. For 123345/123351 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 77625 event pairs, 4361 based on Foata normal form. 13/14484 useless extension candidates. Maximal degree in co-relation 69953. Up to 13209 conditions per place. [2024-06-20 16:33:25,885 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 105 selfloop transitions, 93 changer transitions 0/204 dead transitions. [2024-06-20 16:33:25,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 204 transitions, 2248 flow [2024-06-20 16:33:25,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:25,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:25,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 16:33:25,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2024-06-20 16:33:25,886 INFO L175 Difference]: Start difference. First operand has 91 places, 141 transitions, 1308 flow. Second operand 7 states and 181 transitions. [2024-06-20 16:33:25,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 204 transitions, 2248 flow [2024-06-20 16:33:25,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 204 transitions, 2121 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-20 16:33:25,979 INFO L231 Difference]: Finished difference. Result has 96 places, 157 transitions, 1591 flow [2024-06-20 16:33:25,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1591, PETRI_PLACES=96, PETRI_TRANSITIONS=157} [2024-06-20 16:33:25,980 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 42 predicate places. [2024-06-20 16:33:25,980 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 157 transitions, 1591 flow [2024-06-20 16:33:25,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:25,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:25,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:25,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:33:25,981 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)] === [2024-06-20 16:33:25,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:25,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1516238939, now seen corresponding path program 4 times [2024-06-20 16:33:25,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:25,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806588030] [2024-06-20 16:33:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:25,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:26,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:26,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806588030] [2024-06-20 16:33:26,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806588030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:26,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:26,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:26,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497180895] [2024-06-20 16:33:26,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:26,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:26,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:26,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:26,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:26,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:26,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 157 transitions, 1591 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:26,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:26,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:26,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:28,505 INFO L124 PetriNetUnfolderBase]: 10559/14515 cut-off events. [2024-06-20 16:33:28,506 INFO L125 PetriNetUnfolderBase]: For 152869/152885 co-relation queries the response was YES. [2024-06-20 16:33:28,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73888 conditions, 14515 events. 10559/14515 cut-off events. For 152869/152885 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 78105 event pairs, 4341 based on Foata normal form. 22/14524 useless extension candidates. Maximal degree in co-relation 73849. Up to 13227 conditions per place. [2024-06-20 16:33:28,640 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 95 selfloop transitions, 108 changer transitions 0/209 dead transitions. [2024-06-20 16:33:28,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 209 transitions, 2408 flow [2024-06-20 16:33:28,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:28,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:28,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 16:33:28,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014005602240896 [2024-06-20 16:33:28,642 INFO L175 Difference]: Start difference. First operand has 96 places, 157 transitions, 1591 flow. Second operand 7 states and 179 transitions. [2024-06-20 16:33:28,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 209 transitions, 2408 flow [2024-06-20 16:33:28,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 209 transitions, 2213 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-20 16:33:28,789 INFO L231 Difference]: Finished difference. Result has 100 places, 165 transitions, 1744 flow [2024-06-20 16:33:28,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1744, PETRI_PLACES=100, PETRI_TRANSITIONS=165} [2024-06-20 16:33:28,790 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 46 predicate places. [2024-06-20 16:33:28,790 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 165 transitions, 1744 flow [2024-06-20 16:33:28,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:28,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:28,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:28,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:33:28,791 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)] === [2024-06-20 16:33:28,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:28,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1136186811, now seen corresponding path program 1 times [2024-06-20 16:33:28,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:28,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883719570] [2024-06-20 16:33:28,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:28,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:29,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:29,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883719570] [2024-06-20 16:33:29,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883719570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:29,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:29,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:29,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959603477] [2024-06-20 16:33:29,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:29,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:29,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:29,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:29,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:29,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:33:29,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 165 transitions, 1744 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:29,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:29,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:33:29,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:31,235 INFO L124 PetriNetUnfolderBase]: 9184/12878 cut-off events. [2024-06-20 16:33:31,236 INFO L125 PetriNetUnfolderBase]: For 137708/137712 co-relation queries the response was YES. [2024-06-20 16:33:31,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65871 conditions, 12878 events. 9184/12878 cut-off events. For 137708/137712 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 70572 event pairs, 3611 based on Foata normal form. 12/12888 useless extension candidates. Maximal degree in co-relation 65830. Up to 12350 conditions per place. [2024-06-20 16:33:31,340 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 172 selfloop transitions, 26 changer transitions 0/205 dead transitions. [2024-06-20 16:33:31,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 205 transitions, 2390 flow [2024-06-20 16:33:31,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:31,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:31,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 16:33:31,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49299719887955185 [2024-06-20 16:33:31,341 INFO L175 Difference]: Start difference. First operand has 100 places, 165 transitions, 1744 flow. Second operand 7 states and 176 transitions. [2024-06-20 16:33:31,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 205 transitions, 2390 flow [2024-06-20 16:33:31,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 205 transitions, 2200 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:31,469 INFO L231 Difference]: Finished difference. Result has 103 places, 169 transitions, 1671 flow [2024-06-20 16:33:31,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1671, PETRI_PLACES=103, PETRI_TRANSITIONS=169} [2024-06-20 16:33:31,470 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2024-06-20 16:33:31,470 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 169 transitions, 1671 flow [2024-06-20 16:33:31,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:31,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:31,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:31,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:33:31,470 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)] === [2024-06-20 16:33:31,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:31,470 INFO L85 PathProgramCache]: Analyzing trace with hash 265428354, now seen corresponding path program 1 times [2024-06-20 16:33:31,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:31,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944778226] [2024-06-20 16:33:31,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:31,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:32,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:32,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944778226] [2024-06-20 16:33:32,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944778226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:32,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:32,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:33:32,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578601654] [2024-06-20 16:33:32,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:32,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:33:32,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:32,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:33:32,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:33:32,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:33:32,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 169 transitions, 1671 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:32,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:32,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:33:32,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:33,453 INFO L124 PetriNetUnfolderBase]: 9177/12865 cut-off events. [2024-06-20 16:33:33,453 INFO L125 PetriNetUnfolderBase]: For 150643/150645 co-relation queries the response was YES. [2024-06-20 16:33:33,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67264 conditions, 12865 events. 9177/12865 cut-off events. For 150643/150645 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 70457 event pairs, 3745 based on Foata normal form. 2/12865 useless extension candidates. Maximal degree in co-relation 67222. Up to 12465 conditions per place. [2024-06-20 16:33:33,565 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 166 selfloop transitions, 10 changer transitions 0/183 dead transitions. [2024-06-20 16:33:33,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 183 transitions, 2067 flow [2024-06-20 16:33:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:33:33,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:33:33,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-20 16:33:33,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2024-06-20 16:33:33,566 INFO L175 Difference]: Start difference. First operand has 103 places, 169 transitions, 1671 flow. Second operand 5 states and 117 transitions. [2024-06-20 16:33:33,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 183 transitions, 2067 flow [2024-06-20 16:33:33,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 183 transitions, 1972 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 16:33:33,718 INFO L231 Difference]: Finished difference. Result has 103 places, 169 transitions, 1605 flow [2024-06-20 16:33:33,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1576, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1605, PETRI_PLACES=103, PETRI_TRANSITIONS=169} [2024-06-20 16:33:33,718 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2024-06-20 16:33:33,718 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 169 transitions, 1605 flow [2024-06-20 16:33:33,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:33,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:33,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:33,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:33:33,719 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)] === [2024-06-20 16:33:33,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:33,719 INFO L85 PathProgramCache]: Analyzing trace with hash 562953669, now seen corresponding path program 1 times [2024-06-20 16:33:33,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:33,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166828973] [2024-06-20 16:33:33,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:33,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:34,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:34,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166828973] [2024-06-20 16:33:34,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166828973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:34,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:34,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:34,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716904378] [2024-06-20 16:33:34,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:34,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:34,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:34,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:34,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:34,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:34,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 169 transitions, 1605 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) [2024-06-20 16:33:34,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:34,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:34,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:36,350 INFO L124 PetriNetUnfolderBase]: 10760/14859 cut-off events. [2024-06-20 16:33:36,350 INFO L125 PetriNetUnfolderBase]: For 193986/194018 co-relation queries the response was YES. [2024-06-20 16:33:36,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78370 conditions, 14859 events. 10760/14859 cut-off events. For 193986/194018 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 80811 event pairs, 4411 based on Foata normal form. 35/14890 useless extension candidates. Maximal degree in co-relation 78327. Up to 13428 conditions per place. [2024-06-20 16:33:36,491 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 116 selfloop transitions, 113 changer transitions 0/235 dead transitions. [2024-06-20 16:33:36,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 235 transitions, 2689 flow [2024-06-20 16:33:36,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:36,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:36,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 16:33:36,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-06-20 16:33:36,502 INFO L175 Difference]: Start difference. First operand has 103 places, 169 transitions, 1605 flow. Second operand 7 states and 182 transitions. [2024-06-20 16:33:36,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 235 transitions, 2689 flow [2024-06-20 16:33:36,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 235 transitions, 2656 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:36,673 INFO L231 Difference]: Finished difference. Result has 108 places, 188 transitions, 2151 flow [2024-06-20 16:33:36,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1572, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2151, PETRI_PLACES=108, PETRI_TRANSITIONS=188} [2024-06-20 16:33:36,673 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 54 predicate places. [2024-06-20 16:33:36,673 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 188 transitions, 2151 flow [2024-06-20 16:33:36,674 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) [2024-06-20 16:33:36,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:36,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:36,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:33:36,674 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)] === [2024-06-20 16:33:36,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:36,674 INFO L85 PathProgramCache]: Analyzing trace with hash 562948089, now seen corresponding path program 2 times [2024-06-20 16:33:36,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:36,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650047821] [2024-06-20 16:33:36,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:36,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:37,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:37,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650047821] [2024-06-20 16:33:37,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650047821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:37,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:37,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:37,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449704344] [2024-06-20 16:33:37,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:37,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:37,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:37,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:37,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:37,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:37,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 188 transitions, 2151 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) [2024-06-20 16:33:37,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:37,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:37,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:39,288 INFO L124 PetriNetUnfolderBase]: 10738/14822 cut-off events. [2024-06-20 16:33:39,288 INFO L125 PetriNetUnfolderBase]: For 224831/224855 co-relation queries the response was YES. [2024-06-20 16:33:39,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83307 conditions, 14822 events. 10738/14822 cut-off events. For 224831/224855 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 80215 event pairs, 4423 based on Foata normal form. 29/14847 useless extension candidates. Maximal degree in co-relation 83262. Up to 13414 conditions per place. [2024-06-20 16:33:39,589 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 117 selfloop transitions, 120 changer transitions 0/243 dead transitions. [2024-06-20 16:33:39,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 243 transitions, 3127 flow [2024-06-20 16:33:39,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:39,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-20 16:33:39,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182072829131653 [2024-06-20 16:33:39,591 INFO L175 Difference]: Start difference. First operand has 108 places, 188 transitions, 2151 flow. Second operand 7 states and 185 transitions. [2024-06-20 16:33:39,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 243 transitions, 3127 flow [2024-06-20 16:33:39,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 243 transitions, 2938 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-20 16:33:39,862 INFO L231 Difference]: Finished difference. Result has 114 places, 195 transitions, 2455 flow [2024-06-20 16:33:39,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1966, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2455, PETRI_PLACES=114, PETRI_TRANSITIONS=195} [2024-06-20 16:33:39,862 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 60 predicate places. [2024-06-20 16:33:39,862 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 195 transitions, 2455 flow [2024-06-20 16:33:39,863 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) [2024-06-20 16:33:39,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:39,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:39,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:33:39,863 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)] === [2024-06-20 16:33:39,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:39,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1625508409, now seen corresponding path program 3 times [2024-06-20 16:33:39,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:39,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109090706] [2024-06-20 16:33:39,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:39,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:40,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:40,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109090706] [2024-06-20 16:33:40,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109090706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:40,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:40,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:40,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329431420] [2024-06-20 16:33:40,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:40,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:40,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:40,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:40,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:40,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:40,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 195 transitions, 2455 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) [2024-06-20 16:33:40,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:40,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:40,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:42,531 INFO L124 PetriNetUnfolderBase]: 10753/14868 cut-off events. [2024-06-20 16:33:42,531 INFO L125 PetriNetUnfolderBase]: For 252838/252900 co-relation queries the response was YES. [2024-06-20 16:33:42,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86452 conditions, 14868 events. 10753/14868 cut-off events. For 252838/252900 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 80824 event pairs, 4458 based on Foata normal form. 66/14919 useless extension candidates. Maximal degree in co-relation 86404. Up to 13437 conditions per place. [2024-06-20 16:33:42,662 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 111 selfloop transitions, 124 changer transitions 0/241 dead transitions. [2024-06-20 16:33:42,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 241 transitions, 3269 flow [2024-06-20 16:33:42,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:42,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:42,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 16:33:42,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484593837535014 [2024-06-20 16:33:42,664 INFO L175 Difference]: Start difference. First operand has 114 places, 195 transitions, 2455 flow. Second operand 7 states and 173 transitions. [2024-06-20 16:33:42,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 241 transitions, 3269 flow [2024-06-20 16:33:43,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 241 transitions, 3095 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:43,015 INFO L231 Difference]: Finished difference. Result has 117 places, 204 transitions, 2697 flow [2024-06-20 16:33:43,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2289, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2697, PETRI_PLACES=117, PETRI_TRANSITIONS=204} [2024-06-20 16:33:43,015 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 63 predicate places. [2024-06-20 16:33:43,015 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 204 transitions, 2697 flow [2024-06-20 16:33:43,016 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) [2024-06-20 16:33:43,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:43,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:43,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:33:43,016 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:33:43,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:43,016 INFO L85 PathProgramCache]: Analyzing trace with hash -361653562, now seen corresponding path program 1 times [2024-06-20 16:33:43,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:43,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88216614] [2024-06-20 16:33:43,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:43,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:43,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:43,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88216614] [2024-06-20 16:33:43,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88216614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:43,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:43,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:33:43,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534340954] [2024-06-20 16:33:43,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:43,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:33:43,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:43,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:33:43,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:33:43,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:33:43,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 204 transitions, 2697 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:43,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:43,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:33:43,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:45,399 INFO L124 PetriNetUnfolderBase]: 9344/13406 cut-off events. [2024-06-20 16:33:45,399 INFO L125 PetriNetUnfolderBase]: For 231142/231144 co-relation queries the response was YES. [2024-06-20 16:33:45,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77887 conditions, 13406 events. 9344/13406 cut-off events. For 231142/231144 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 75671 event pairs, 3735 based on Foata normal form. 4/13408 useless extension candidates. Maximal degree in co-relation 77838. Up to 12672 conditions per place. [2024-06-20 16:33:45,525 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 206 selfloop transitions, 14 changer transitions 0/227 dead transitions. [2024-06-20 16:33:45,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 227 transitions, 3237 flow [2024-06-20 16:33:45,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:33:45,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:33:45,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-20 16:33:45,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2024-06-20 16:33:45,527 INFO L175 Difference]: Start difference. First operand has 117 places, 204 transitions, 2697 flow. Second operand 6 states and 138 transitions. [2024-06-20 16:33:45,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 227 transitions, 3237 flow [2024-06-20 16:33:45,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 227 transitions, 3025 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:45,782 INFO L231 Difference]: Finished difference. Result has 119 places, 208 transitions, 2572 flow [2024-06-20 16:33:45,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2485, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2572, PETRI_PLACES=119, PETRI_TRANSITIONS=208} [2024-06-20 16:33:45,783 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 65 predicate places. [2024-06-20 16:33:45,783 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 208 transitions, 2572 flow [2024-06-20 16:33:45,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:45,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:45,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:45,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:33:45,784 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)] === [2024-06-20 16:33:45,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:45,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1103530162, now seen corresponding path program 1 times [2024-06-20 16:33:45,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:45,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678142378] [2024-06-20 16:33:45,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:45,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:46,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:46,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678142378] [2024-06-20 16:33:46,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678142378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:46,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:46,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:46,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297181076] [2024-06-20 16:33:46,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:46,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:46,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:46,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:46,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:46,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:46,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 208 transitions, 2572 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) [2024-06-20 16:33:46,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:46,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:46,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:48,413 INFO L124 PetriNetUnfolderBase]: 10775/14879 cut-off events. [2024-06-20 16:33:48,414 INFO L125 PetriNetUnfolderBase]: For 290357/290393 co-relation queries the response was YES. [2024-06-20 16:33:48,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89535 conditions, 14879 events. 10775/14879 cut-off events. For 290357/290393 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 80126 event pairs, 3384 based on Foata normal form. 38/14914 useless extension candidates. Maximal degree in co-relation 89484. Up to 14194 conditions per place. [2024-06-20 16:33:48,561 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 207 selfloop transitions, 41 changer transitions 0/254 dead transitions. [2024-06-20 16:33:48,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 254 transitions, 3418 flow [2024-06-20 16:33:48,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:48,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 16:33:48,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789915966386555 [2024-06-20 16:33:48,563 INFO L175 Difference]: Start difference. First operand has 119 places, 208 transitions, 2572 flow. Second operand 7 states and 171 transitions. [2024-06-20 16:33:48,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 254 transitions, 3418 flow [2024-06-20 16:33:48,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 254 transitions, 3361 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:48,894 INFO L231 Difference]: Finished difference. Result has 122 places, 214 transitions, 2733 flow [2024-06-20 16:33:48,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2515, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2733, PETRI_PLACES=122, PETRI_TRANSITIONS=214} [2024-06-20 16:33:48,895 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 68 predicate places. [2024-06-20 16:33:48,895 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 214 transitions, 2733 flow [2024-06-20 16:33:48,895 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) [2024-06-20 16:33:48,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:48,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:48,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:33:48,896 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)] === [2024-06-20 16:33:48,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:48,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2006921832, now seen corresponding path program 2 times [2024-06-20 16:33:48,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:48,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328744931] [2024-06-20 16:33:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:48,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:49,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:49,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328744931] [2024-06-20 16:33:49,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328744931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:49,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:49,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:49,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056896813] [2024-06-20 16:33:49,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:49,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:49,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:49,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:49,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:49,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:49,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 214 transitions, 2733 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) [2024-06-20 16:33:49,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:49,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:49,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:51,580 INFO L124 PetriNetUnfolderBase]: 10760/14849 cut-off events. [2024-06-20 16:33:51,580 INFO L125 PetriNetUnfolderBase]: For 320750/320770 co-relation queries the response was YES. [2024-06-20 16:33:51,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91984 conditions, 14849 events. 10760/14849 cut-off events. For 320750/320770 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 79812 event pairs, 4052 based on Foata normal form. 22/14868 useless extension candidates. Maximal degree in co-relation 91932. Up to 14309 conditions per place. [2024-06-20 16:33:51,733 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 206 selfloop transitions, 40 changer transitions 0/252 dead transitions. [2024-06-20 16:33:51,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 252 transitions, 3355 flow [2024-06-20 16:33:51,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:51,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:51,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 16:33:51,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-20 16:33:51,734 INFO L175 Difference]: Start difference. First operand has 122 places, 214 transitions, 2733 flow. Second operand 7 states and 168 transitions. [2024-06-20 16:33:51,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 252 transitions, 3355 flow [2024-06-20 16:33:52,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 252 transitions, 3219 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-20 16:33:52,202 INFO L231 Difference]: Finished difference. Result has 126 places, 214 transitions, 2689 flow [2024-06-20 16:33:52,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2597, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2689, PETRI_PLACES=126, PETRI_TRANSITIONS=214} [2024-06-20 16:33:52,203 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 72 predicate places. [2024-06-20 16:33:52,203 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 214 transitions, 2689 flow [2024-06-20 16:33:52,203 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) [2024-06-20 16:33:52,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:52,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:52,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:33:52,204 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)] === [2024-06-20 16:33:52,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:52,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1221862990, now seen corresponding path program 1 times [2024-06-20 16:33:52,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:52,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382678947] [2024-06-20 16:33:52,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:52,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:53,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:53,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382678947] [2024-06-20 16:33:53,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382678947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:53,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:53,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:53,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264384547] [2024-06-20 16:33:53,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:53,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:53,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:53,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:53,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:53,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:53,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 214 transitions, 2689 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:53,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:53,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:53,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:55,300 INFO L124 PetriNetUnfolderBase]: 11085/15323 cut-off events. [2024-06-20 16:33:55,300 INFO L125 PetriNetUnfolderBase]: For 359849/359869 co-relation queries the response was YES. [2024-06-20 16:33:55,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95655 conditions, 15323 events. 11085/15323 cut-off events. For 359849/359869 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 83287 event pairs, 4024 based on Foata normal form. 63/15382 useless extension candidates. Maximal degree in co-relation 95601. Up to 13521 conditions per place. [2024-06-20 16:33:55,434 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 133 selfloop transitions, 133 changer transitions 0/272 dead transitions. [2024-06-20 16:33:55,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 272 transitions, 3713 flow [2024-06-20 16:33:55,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:55,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-20 16:33:55,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-06-20 16:33:55,435 INFO L175 Difference]: Start difference. First operand has 126 places, 214 transitions, 2689 flow. Second operand 8 states and 208 transitions. [2024-06-20 16:33:55,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 272 transitions, 3713 flow [2024-06-20 16:33:55,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 272 transitions, 3621 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:55,809 INFO L231 Difference]: Finished difference. Result has 128 places, 218 transitions, 2961 flow [2024-06-20 16:33:55,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2597, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2961, PETRI_PLACES=128, PETRI_TRANSITIONS=218} [2024-06-20 16:33:55,809 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 74 predicate places. [2024-06-20 16:33:55,809 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 218 transitions, 2961 flow [2024-06-20 16:33:55,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:55,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:55,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:55,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:33:55,811 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:33:55,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:55,812 INFO L85 PathProgramCache]: Analyzing trace with hash 545933055, now seen corresponding path program 1 times [2024-06-20 16:33:55,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:55,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686304552] [2024-06-20 16:33:55,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:55,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:56,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:56,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686304552] [2024-06-20 16:33:56,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686304552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:56,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:56,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:33:56,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131545394] [2024-06-20 16:33:56,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:56,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:33:56,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:56,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:33:56,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:33:56,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:56,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 218 transitions, 2961 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:56,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:56,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:56,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:58,488 INFO L124 PetriNetUnfolderBase]: 11108/15356 cut-off events. [2024-06-20 16:33:58,488 INFO L125 PetriNetUnfolderBase]: For 386618/386632 co-relation queries the response was YES. [2024-06-20 16:33:58,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100302 conditions, 15356 events. 11108/15356 cut-off events. For 386618/386632 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 83260 event pairs, 4061 based on Foata normal form. 18/15372 useless extension candidates. Maximal degree in co-relation 100247. Up to 15010 conditions per place. [2024-06-20 16:33:58,644 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 219 selfloop transitions, 29 changer transitions 0/254 dead transitions. [2024-06-20 16:33:58,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 254 transitions, 3783 flow [2024-06-20 16:33:58,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:33:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:33:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-20 16:33:58,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46405228758169936 [2024-06-20 16:33:58,645 INFO L175 Difference]: Start difference. First operand has 128 places, 218 transitions, 2961 flow. Second operand 6 states and 142 transitions. [2024-06-20 16:33:58,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 254 transitions, 3783 flow [2024-06-20 16:33:59,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 254 transitions, 3461 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:59,138 INFO L231 Difference]: Finished difference. Result has 128 places, 225 transitions, 2851 flow [2024-06-20 16:33:59,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2651, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2851, PETRI_PLACES=128, PETRI_TRANSITIONS=225} [2024-06-20 16:33:59,138 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 74 predicate places. [2024-06-20 16:33:59,138 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 225 transitions, 2851 flow [2024-06-20 16:33:59,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:59,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:59,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:59,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:33:59,139 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)] === [2024-06-20 16:33:59,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:59,139 INFO L85 PathProgramCache]: Analyzing trace with hash 717397692, now seen corresponding path program 2 times [2024-06-20 16:33:59,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:59,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749373855] [2024-06-20 16:33:59,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:59,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:00,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:00,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749373855] [2024-06-20 16:34:00,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749373855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:00,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:00,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:00,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050448805] [2024-06-20 16:34:00,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:00,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:00,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:00,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:00,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:00,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:34:00,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 225 transitions, 2851 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:00,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:00,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:34:00,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:02,369 INFO L124 PetriNetUnfolderBase]: 11179/15433 cut-off events. [2024-06-20 16:34:02,370 INFO L125 PetriNetUnfolderBase]: For 403442/403452 co-relation queries the response was YES. [2024-06-20 16:34:02,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99558 conditions, 15433 events. 11179/15433 cut-off events. For 403442/403452 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 83599 event pairs, 4063 based on Foata normal form. 18/15436 useless extension candidates. Maximal degree in co-relation 99502. Up to 13972 conditions per place. [2024-06-20 16:34:02,544 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 132 selfloop transitions, 140 changer transitions 0/278 dead transitions. [2024-06-20 16:34:02,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 278 transitions, 3903 flow [2024-06-20 16:34:02,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:02,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:02,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 16:34:02,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4950980392156863 [2024-06-20 16:34:02,546 INFO L175 Difference]: Start difference. First operand has 128 places, 225 transitions, 2851 flow. Second operand 8 states and 202 transitions. [2024-06-20 16:34:02,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 278 transitions, 3903 flow [2024-06-20 16:34:02,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 278 transitions, 3521 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:02,935 INFO L231 Difference]: Finished difference. Result has 129 places, 229 transitions, 2851 flow [2024-06-20 16:34:02,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2469, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2851, PETRI_PLACES=129, PETRI_TRANSITIONS=229} [2024-06-20 16:34:02,935 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 75 predicate places. [2024-06-20 16:34:02,935 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 229 transitions, 2851 flow [2024-06-20 16:34:02,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:02,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:02,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:02,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:34:02,936 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)] === [2024-06-20 16:34:02,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:02,936 INFO L85 PathProgramCache]: Analyzing trace with hash 945298842, now seen corresponding path program 3 times [2024-06-20 16:34:02,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:02,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623213401] [2024-06-20 16:34:02,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:02,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:02,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:03,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:03,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623213401] [2024-06-20 16:34:03,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623213401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:03,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:03,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:03,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130151322] [2024-06-20 16:34:03,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:03,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:03,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:03,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:03,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:03,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:34:03,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 229 transitions, 2851 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:03,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:03,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:34:03,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:06,220 INFO L124 PetriNetUnfolderBase]: 11250/15544 cut-off events. [2024-06-20 16:34:06,221 INFO L125 PetriNetUnfolderBase]: For 434929/434947 co-relation queries the response was YES. [2024-06-20 16:34:06,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103838 conditions, 15544 events. 11250/15544 cut-off events. For 434929/434947 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 84170 event pairs, 4047 based on Foata normal form. 26/15555 useless extension candidates. Maximal degree in co-relation 103783. Up to 14077 conditions per place. [2024-06-20 16:34:06,366 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 127 selfloop transitions, 148 changer transitions 0/281 dead transitions. [2024-06-20 16:34:06,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 281 transitions, 3837 flow [2024-06-20 16:34:06,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:06,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:06,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 16:34:06,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49264705882352944 [2024-06-20 16:34:06,367 INFO L175 Difference]: Start difference. First operand has 129 places, 229 transitions, 2851 flow. Second operand 8 states and 201 transitions. [2024-06-20 16:34:06,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 281 transitions, 3837 flow [2024-06-20 16:34:06,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 281 transitions, 3489 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:06,774 INFO L231 Difference]: Finished difference. Result has 131 places, 233 transitions, 2909 flow [2024-06-20 16:34:06,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2503, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2909, PETRI_PLACES=131, PETRI_TRANSITIONS=233} [2024-06-20 16:34:06,774 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 77 predicate places. [2024-06-20 16:34:06,774 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 233 transitions, 2909 flow [2024-06-20 16:34:06,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:06,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:06,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:06,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:34:06,774 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)] === [2024-06-20 16:34:06,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:06,775 INFO L85 PathProgramCache]: Analyzing trace with hash 953869722, now seen corresponding path program 4 times [2024-06-20 16:34:06,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:06,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321418520] [2024-06-20 16:34:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:06,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:07,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:07,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321418520] [2024-06-20 16:34:07,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321418520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:07,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:07,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:07,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466509549] [2024-06-20 16:34:07,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:07,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:07,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:07,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:07,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:07,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:34:07,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 233 transitions, 2909 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:07,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:07,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:34:07,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:10,078 INFO L124 PetriNetUnfolderBase]: 11270/15572 cut-off events. [2024-06-20 16:34:10,078 INFO L125 PetriNetUnfolderBase]: For 469194/469212 co-relation queries the response was YES. [2024-06-20 16:34:10,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106566 conditions, 15572 events. 11270/15572 cut-off events. For 469194/469212 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 84471 event pairs, 3661 based on Foata normal form. 26/15583 useless extension candidates. Maximal degree in co-relation 106510. Up to 13517 conditions per place. [2024-06-20 16:34:10,233 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 119 selfloop transitions, 163 changer transitions 0/288 dead transitions. [2024-06-20 16:34:10,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 288 transitions, 3933 flow [2024-06-20 16:34:10,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:10,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 16:34:10,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024509803921569 [2024-06-20 16:34:10,235 INFO L175 Difference]: Start difference. First operand has 131 places, 233 transitions, 2909 flow. Second operand 8 states and 205 transitions. [2024-06-20 16:34:10,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 288 transitions, 3933 flow [2024-06-20 16:34:10,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 288 transitions, 3561 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:10,795 INFO L231 Difference]: Finished difference. Result has 133 places, 237 transitions, 2980 flow [2024-06-20 16:34:10,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2537, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2980, PETRI_PLACES=133, PETRI_TRANSITIONS=237} [2024-06-20 16:34:10,795 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 79 predicate places. [2024-06-20 16:34:10,796 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 237 transitions, 2980 flow [2024-06-20 16:34:10,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:10,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:10,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:10,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:34:10,796 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:34:10,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:10,796 INFO L85 PathProgramCache]: Analyzing trace with hash 170289303, now seen corresponding path program 2 times [2024-06-20 16:34:10,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:10,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663958884] [2024-06-20 16:34:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:10,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:11,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:11,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663958884] [2024-06-20 16:34:11,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663958884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:11,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:11,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:34:11,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429989328] [2024-06-20 16:34:11,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:11,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:34:11,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:11,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:34:11,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:34:11,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:34:11,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 237 transitions, 2980 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:11,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:11,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:34:11,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:14,226 INFO L124 PetriNetUnfolderBase]: 11259/15577 cut-off events. [2024-06-20 16:34:14,227 INFO L125 PetriNetUnfolderBase]: For 502570/502598 co-relation queries the response was YES. [2024-06-20 16:34:14,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109192 conditions, 15577 events. 11259/15577 cut-off events. For 502570/502598 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 84635 event pairs, 4063 based on Foata normal form. 23/15594 useless extension candidates. Maximal degree in co-relation 109135. Up to 15229 conditions per place. [2024-06-20 16:34:14,364 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 224 selfloop transitions, 29 changer transitions 0/259 dead transitions. [2024-06-20 16:34:14,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 259 transitions, 3568 flow [2024-06-20 16:34:14,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:34:14,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:34:14,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-20 16:34:14,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43790849673202614 [2024-06-20 16:34:14,365 INFO L175 Difference]: Start difference. First operand has 133 places, 237 transitions, 2980 flow. Second operand 6 states and 134 transitions. [2024-06-20 16:34:14,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 259 transitions, 3568 flow [2024-06-20 16:34:14,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 259 transitions, 3131 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:14,941 INFO L231 Difference]: Finished difference. Result has 133 places, 237 transitions, 2613 flow [2024-06-20 16:34:14,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2543, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2613, PETRI_PLACES=133, PETRI_TRANSITIONS=237} [2024-06-20 16:34:14,941 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 79 predicate places. [2024-06-20 16:34:14,941 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 237 transitions, 2613 flow [2024-06-20 16:34:14,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:14,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:14,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:14,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:34:14,942 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:34:14,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:14,942 INFO L85 PathProgramCache]: Analyzing trace with hash 214620299, now seen corresponding path program 1 times [2024-06-20 16:34:14,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:14,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083742157] [2024-06-20 16:34:14,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:14,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:15,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:15,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083742157] [2024-06-20 16:34:15,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083742157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:15,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:15,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:34:15,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627369165] [2024-06-20 16:34:15,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:15,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:34:15,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:15,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:34:15,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:34:15,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:34:15,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 237 transitions, 2613 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:15,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:15,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:34:15,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:17,748 INFO L124 PetriNetUnfolderBase]: 9873/14073 cut-off events. [2024-06-20 16:34:17,749 INFO L125 PetriNetUnfolderBase]: For 439237/439243 co-relation queries the response was YES. [2024-06-20 16:34:17,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95462 conditions, 14073 events. 9873/14073 cut-off events. For 439237/439243 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 79319 event pairs, 3453 based on Foata normal form. 8/14079 useless extension candidates. Maximal degree in co-relation 95404. Up to 13379 conditions per place. [2024-06-20 16:34:17,865 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 232 selfloop transitions, 25 changer transitions 0/264 dead transitions. [2024-06-20 16:34:17,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 264 transitions, 3354 flow [2024-06-20 16:34:17,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:34:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:34:17,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 16:34:17,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477124183006536 [2024-06-20 16:34:17,866 INFO L175 Difference]: Start difference. First operand has 133 places, 237 transitions, 2613 flow. Second operand 6 states and 146 transitions. [2024-06-20 16:34:17,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 264 transitions, 3354 flow [2024-06-20 16:34:18,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 264 transitions, 3273 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 16:34:18,264 INFO L231 Difference]: Finished difference. Result has 134 places, 241 transitions, 2648 flow [2024-06-20 16:34:18,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2532, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2648, PETRI_PLACES=134, PETRI_TRANSITIONS=241} [2024-06-20 16:34:18,265 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 80 predicate places. [2024-06-20 16:34:18,265 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 241 transitions, 2648 flow [2024-06-20 16:34:18,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:18,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:18,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:18,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:34:18,266 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:34:18,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:18,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1674587007, now seen corresponding path program 2 times [2024-06-20 16:34:18,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:18,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89204328] [2024-06-20 16:34:18,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:18,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:19,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:19,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89204328] [2024-06-20 16:34:19,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89204328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:19,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:19,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:34:19,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72283616] [2024-06-20 16:34:19,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:19,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:34:19,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:19,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:34:19,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:34:19,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:34:19,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 241 transitions, 2648 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:19,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:19,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:34:19,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:21,185 INFO L124 PetriNetUnfolderBase]: 9827/13998 cut-off events. [2024-06-20 16:34:21,186 INFO L125 PetriNetUnfolderBase]: For 460155/460163 co-relation queries the response was YES. [2024-06-20 16:34:21,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95969 conditions, 13998 events. 9827/13998 cut-off events. For 460155/460163 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 78848 event pairs, 3465 based on Foata normal form. 3/13996 useless extension candidates. Maximal degree in co-relation 95910. Up to 13317 conditions per place. [2024-06-20 16:34:21,313 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 226 selfloop transitions, 26 changer transitions 0/259 dead transitions. [2024-06-20 16:34:21,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 259 transitions, 3208 flow [2024-06-20 16:34:21,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:34:21,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:34:21,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-20 16:34:21,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46405228758169936 [2024-06-20 16:34:21,314 INFO L175 Difference]: Start difference. First operand has 134 places, 241 transitions, 2648 flow. Second operand 6 states and 142 transitions. [2024-06-20 16:34:21,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 259 transitions, 3208 flow [2024-06-20 16:34:21,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 259 transitions, 3153 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 16:34:21,741 INFO L231 Difference]: Finished difference. Result has 137 places, 241 transitions, 2654 flow [2024-06-20 16:34:21,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2593, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2654, PETRI_PLACES=137, PETRI_TRANSITIONS=241} [2024-06-20 16:34:21,741 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 83 predicate places. [2024-06-20 16:34:21,741 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 241 transitions, 2654 flow [2024-06-20 16:34:21,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:21,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:21,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:21,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:34:21,742 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:34:21,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:21,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1314129812, now seen corresponding path program 1 times [2024-06-20 16:34:21,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:21,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091178272] [2024-06-20 16:34:21,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:21,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:22,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:22,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091178272] [2024-06-20 16:34:22,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091178272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:22,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:22,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:22,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051417371] [2024-06-20 16:34:22,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:22,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:22,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:22,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:22,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:22,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:34:22,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 241 transitions, 2654 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) [2024-06-20 16:34:22,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:22,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:34:22,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:25,498 INFO L124 PetriNetUnfolderBase]: 11820/16425 cut-off events. [2024-06-20 16:34:25,498 INFO L125 PetriNetUnfolderBase]: For 614071/614083 co-relation queries the response was YES. [2024-06-20 16:34:25,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116727 conditions, 16425 events. 11820/16425 cut-off events. For 614071/614083 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 91036 event pairs, 3206 based on Foata normal form. 35/16456 useless extension candidates. Maximal degree in co-relation 116667. Up to 12932 conditions per place. [2024-06-20 16:34:25,645 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 168 selfloop transitions, 136 changer transitions 0/310 dead transitions. [2024-06-20 16:34:25,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 310 transitions, 4100 flow [2024-06-20 16:34:25,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:25,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-20 16:34:25,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5171568627450981 [2024-06-20 16:34:25,646 INFO L175 Difference]: Start difference. First operand has 137 places, 241 transitions, 2654 flow. Second operand 8 states and 211 transitions. [2024-06-20 16:34:25,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 310 transitions, 4100 flow [2024-06-20 16:34:26,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 310 transitions, 4008 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:26,158 INFO L231 Difference]: Finished difference. Result has 140 places, 250 transitions, 3118 flow [2024-06-20 16:34:26,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2562, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3118, PETRI_PLACES=140, PETRI_TRANSITIONS=250} [2024-06-20 16:34:26,158 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 86 predicate places. [2024-06-20 16:34:26,159 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 250 transitions, 3118 flow [2024-06-20 16:34:26,159 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) [2024-06-20 16:34:26,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:26,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:26,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:34:26,159 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:34:26,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:26,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1225564052, now seen corresponding path program 2 times [2024-06-20 16:34:26,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:26,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544538737] [2024-06-20 16:34:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:26,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:27,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:27,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544538737] [2024-06-20 16:34:27,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544538737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:27,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:27,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:27,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22409652] [2024-06-20 16:34:27,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:27,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:27,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:27,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:27,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:27,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:34:27,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 250 transitions, 3118 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) [2024-06-20 16:34:27,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:27,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:34:27,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:30,001 INFO L124 PetriNetUnfolderBase]: 12223/17021 cut-off events. [2024-06-20 16:34:30,001 INFO L125 PetriNetUnfolderBase]: For 689802/689814 co-relation queries the response was YES. [2024-06-20 16:34:30,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127354 conditions, 17021 events. 12223/17021 cut-off events. For 689802/689814 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 95361 event pairs, 4221 based on Foata normal form. 35/17052 useless extension candidates. Maximal degree in co-relation 127292. Up to 14571 conditions per place. [2024-06-20 16:34:30,160 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 162 selfloop transitions, 144 changer transitions 0/312 dead transitions. [2024-06-20 16:34:30,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 312 transitions, 4436 flow [2024-06-20 16:34:30,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:30,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:30,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-20 16:34:30,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5122549019607843 [2024-06-20 16:34:30,161 INFO L175 Difference]: Start difference. First operand has 140 places, 250 transitions, 3118 flow. Second operand 8 states and 209 transitions. [2024-06-20 16:34:30,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 312 transitions, 4436 flow [2024-06-20 16:34:30,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 312 transitions, 4227 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-20 16:34:30,922 INFO L231 Difference]: Finished difference. Result has 146 places, 257 transitions, 3425 flow [2024-06-20 16:34:30,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2909, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3425, PETRI_PLACES=146, PETRI_TRANSITIONS=257} [2024-06-20 16:34:30,923 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 92 predicate places. [2024-06-20 16:34:30,923 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 257 transitions, 3425 flow [2024-06-20 16:34:30,923 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) [2024-06-20 16:34:30,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:30,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:30,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:34:30,923 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:34:30,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:30,924 INFO L85 PathProgramCache]: Analyzing trace with hash -256241325, now seen corresponding path program 1 times [2024-06-20 16:34:30,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:30,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76168089] [2024-06-20 16:34:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:30,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:31,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:31,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76168089] [2024-06-20 16:34:31,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76168089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:31,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:31,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:34:31,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676425670] [2024-06-20 16:34:31,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:31,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:34:31,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:31,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:34:31,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:34:31,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:34:31,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 257 transitions, 3425 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:31,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:31,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:34:31,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:34,534 INFO L124 PetriNetUnfolderBase]: 12319/17204 cut-off events. [2024-06-20 16:34:34,534 INFO L125 PetriNetUnfolderBase]: For 745805/745831 co-relation queries the response was YES. [2024-06-20 16:34:34,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132230 conditions, 17204 events. 12319/17204 cut-off events. For 745805/745831 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 96969 event pairs, 4286 based on Foata normal form. 33/17233 useless extension candidates. Maximal degree in co-relation 132165. Up to 15632 conditions per place. [2024-06-20 16:34:34,721 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 154 selfloop transitions, 148 changer transitions 0/308 dead transitions. [2024-06-20 16:34:34,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 308 transitions, 4584 flow [2024-06-20 16:34:34,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:34:34,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:34:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 16:34:34,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014005602240896 [2024-06-20 16:34:34,722 INFO L175 Difference]: Start difference. First operand has 146 places, 257 transitions, 3425 flow. Second operand 7 states and 179 transitions. [2024-06-20 16:34:34,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 308 transitions, 4584 flow [2024-06-20 16:34:35,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 308 transitions, 4331 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-20 16:34:35,662 INFO L231 Difference]: Finished difference. Result has 149 places, 268 transitions, 3672 flow [2024-06-20 16:34:35,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3184, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3672, PETRI_PLACES=149, PETRI_TRANSITIONS=268} [2024-06-20 16:34:35,662 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 95 predicate places. [2024-06-20 16:34:35,662 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 268 transitions, 3672 flow [2024-06-20 16:34:35,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:35,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:35,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:35,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:34:35,663 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:34:35,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:35,663 INFO L85 PathProgramCache]: Analyzing trace with hash -782677192, now seen corresponding path program 3 times [2024-06-20 16:34:35,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:35,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409091228] [2024-06-20 16:34:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:35,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:36,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:36,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409091228] [2024-06-20 16:34:36,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409091228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:36,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:36,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:36,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785310051] [2024-06-20 16:34:36,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:36,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:36,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:36,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:36,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:36,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:34:36,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 268 transitions, 3672 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) [2024-06-20 16:34:36,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:36,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:34:36,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand