./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi009_power.opt_pso.oepc_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/rfi009_power.opt_pso.oepc_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi009_power.opt_pso.oepc_pso.opt_rmo.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/rfi009_power.opt_pso.oepc_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-bcb38a6-m [2024-06-03 20:01:46,788 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:01:46,850 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:01:46,854 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:01:46,855 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:01:46,880 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:01:46,881 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:01:46,881 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:01:46,882 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:01:46,885 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:01:46,885 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:01:46,885 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:01:46,886 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:01:46,887 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:01:46,887 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:01:46,888 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:01:46,888 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:01:46,888 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:01:46,888 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:01:46,889 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:01:46,890 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:01:46,890 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:01:46,890 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:01:46,890 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:01:46,891 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:01:46,891 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:01:46,891 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:01:46,891 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:01:46,892 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:01:46,892 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:01:46,893 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:01:46,893 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:01:46,893 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:01:46,893 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:01:46,893 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:01:46,894 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:01:46,894 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:01:46,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:01:46,894 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:01:46,894 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:01:46,894 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:01:46,895 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:01:46,895 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:01:46,895 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:01:47,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:01:47,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:01:47,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:01:47,073 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:01:47,074 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:01:47,075 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi009_power.opt_pso.oepc_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-03 20:01:48,130 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:01:48,315 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:01:48,316 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi009_power.opt_pso.oepc_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-03 20:01:48,326 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea77d1094/45c081baa92d49b0aac333cde8bac566/FLAGd776ae726 [2024-06-03 20:01:48,336 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea77d1094/45c081baa92d49b0aac333cde8bac566 [2024-06-03 20:01:48,338 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:01:48,338 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:01:48,339 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/rfi009_power.opt_pso.oepc_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-03 20:01:48,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:01:48,544 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:01:48,546 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:01:48,547 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:01:48,550 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:01:48,551 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:01:48" (1/2) ... [2024-06-03 20:01:48,552 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25cd3af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:01:48, skipping insertion in model container [2024-06-03 20:01:48,552 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:01:48" (1/2) ... [2024-06-03 20:01:48,553 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@44e9c55c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:01:48, skipping insertion in model container [2024-06-03 20:01:48,553 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:01:48" (2/2) ... [2024-06-03 20:01:48,553 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25cd3af7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:01:48, skipping insertion in model container [2024-06-03 20:01:48,554 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:01:48" (2/2) ... [2024-06-03 20:01:48,554 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:01:48,628 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:01:48,629 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((((! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1))) [2024-06-03 20:01:48,630 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((((! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1))) [2024-06-03 20:01:48,630 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((((! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1))) [2024-06-03 20:01:48,630 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:01:48,630 INFO L106 edCorrectnessWitness]: ghost_update [L845-L845] multithreaded = 1; [2024-06-03 20:01:48,666 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:01:48,963 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:01:48,970 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:01:49,102 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:01:49,157 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:01:49,157 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:01:49 WrapperNode [2024-06-03 20:01:49,160 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:01:49,161 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:01:49,161 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:01:49,161 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:01:49,167 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 03.06 08:01:49" (1/1) ... [2024-06-03 20:01:49,181 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 03.06 08:01:49" (1/1) ... [2024-06-03 20:01:49,205 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 148 [2024-06-03 20:01:49,205 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:01:49,206 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:01:49,206 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:01:49,206 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:01:49,214 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:01:49" (1/1) ... [2024-06-03 20:01:49,214 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:01:49" (1/1) ... [2024-06-03 20:01:49,217 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:01:49" (1/1) ... [2024-06-03 20:01:49,230 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 20:01:49,230 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:01:49" (1/1) ... [2024-06-03 20:01:49,231 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:01:49" (1/1) ... [2024-06-03 20:01:49,241 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:01:49" (1/1) ... [2024-06-03 20:01:49,243 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:01:49" (1/1) ... [2024-06-03 20:01:49,244 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:01:49" (1/1) ... [2024-06-03 20:01:49,245 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:01:49" (1/1) ... [2024-06-03 20:01:49,248 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:01:49,249 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:01:49,249 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:01:49,249 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:01:49,250 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:01:49" (1/1) ... [2024-06-03 20:01:49,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:01:49,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:01:49,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 20:01:49,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 20:01:49,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:01:49,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:01:49,323 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:01:49,324 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:01:49,324 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:01:49,324 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:01:49,324 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:01:49,324 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:01:49,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:01:49,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:01:49,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:01:49,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:01:49,326 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:01:49,459 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:01:49,461 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:01:49,740 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:01:49,741 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:01:49,861 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:01:49,861 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:01:49,862 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:01:49 BoogieIcfgContainer [2024-06-03 20:01:49,862 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:01:49,863 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:01:49,863 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:01:49,865 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:01:49,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:01:48" (1/4) ... [2024-06-03 20:01:49,866 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346fc4ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:01:49, skipping insertion in model container [2024-06-03 20:01:49,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:01:48" (2/4) ... [2024-06-03 20:01:49,866 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346fc4ad and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:01:49, skipping insertion in model container [2024-06-03 20:01:49,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:01:49" (3/4) ... [2024-06-03 20:01:49,867 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346fc4ad and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:01:49, skipping insertion in model container [2024-06-03 20:01:49,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:01:49" (4/4) ... [2024-06-03 20:01:49,868 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi009_power.opt_pso.oepc_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-03 20:01:49,881 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:01:49,881 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:01:49,881 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:01:49,917 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:01:49,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 20:01:49,979 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-03 20:01:49,980 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:01:49,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 20:01:49,981 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 20:01:49,983 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-03 20:01:49,989 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:01:49,993 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;@2d4f0934, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:01:49,994 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:01:49,996 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:01:49,996 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:01:49,997 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:01:49,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:49,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:01:49,997 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:01:50,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:50,001 INFO L85 PathProgramCache]: Analyzing trace with hash -505467053, now seen corresponding path program 1 times [2024-06-03 20:01:50,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:50,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473813585] [2024-06-03 20:01:50,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:50,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:50,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:50,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473813585] [2024-06-03 20:01:50,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473813585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:50,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:50,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:01:50,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779428897] [2024-06-03 20:01:50,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:50,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:01:50,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:50,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:01:50,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:01:51,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 20:01:51,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:01:51,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:51,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 20:01:51,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:51,357 INFO L124 PetriNetUnfolderBase]: 891/1389 cut-off events. [2024-06-03 20:01:51,358 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-06-03 20:01:51,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2812 conditions, 1389 events. 891/1389 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6670 event pairs, 463 based on Foata normal form. 2/1363 useless extension candidates. Maximal degree in co-relation 2797. Up to 1335 conditions per place. [2024-06-03 20:01:51,371 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-03 20:01:51,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 175 flow [2024-06-03 20:01:51,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:01:51,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:01:51,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-03 20:01:51,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-03 20:01:51,383 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 76 transitions. [2024-06-03 20:01:51,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 175 flow [2024-06-03 20:01:51,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:01:51,388 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-03 20:01:51,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-03 20:01:51,392 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-03 20:01:51,392 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-03 20:01:51,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:01:51,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:51,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:51,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:01:51,393 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:01:51,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:51,396 INFO L85 PathProgramCache]: Analyzing trace with hash 596981969, now seen corresponding path program 1 times [2024-06-03 20:01:51,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:51,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497120633] [2024-06-03 20:01:51,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:51,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:52,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:52,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497120633] [2024-06-03 20:01:52,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497120633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:52,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:52,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:01:52,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942637712] [2024-06-03 20:01:52,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:52,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:01:52,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:52,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:01:52,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:01:52,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-03 20:01:52,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:01:52,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:52,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-03 20:01:52,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:52,960 INFO L124 PetriNetUnfolderBase]: 1131/1744 cut-off events. [2024-06-03 20:01:52,961 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2024-06-03 20:01:52,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4014 conditions, 1744 events. 1131/1744 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8192 event pairs, 409 based on Foata normal form. 6/1744 useless extension candidates. Maximal degree in co-relation 3999. Up to 1639 conditions per place. [2024-06-03 20:01:52,968 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 39 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2024-06-03 20:01:52,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 228 flow [2024-06-03 20:01:52,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:01:52,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:01:52,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-03 20:01:52,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:01:52,970 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 92 transitions. [2024-06-03 20:01:52,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 228 flow [2024-06-03 20:01:52,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:01:52,972 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 123 flow [2024-06-03 20:01:52,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-06-03 20:01:52,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-06-03 20:01:52,973 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 123 flow [2024-06-03 20:01:52,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:01:52,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:52,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:52,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:01:52,974 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:01:52,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:52,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1276442192, now seen corresponding path program 1 times [2024-06-03 20:01:52,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:52,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564400838] [2024-06-03 20:01:52,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:52,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:53,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:53,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564400838] [2024-06-03 20:01:53,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564400838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:53,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:53,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:01:53,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999635855] [2024-06-03 20:01:53,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:53,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:01:53,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:53,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:01:53,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:01:53,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-03 20:01:53,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:01:53,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:53,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-03 20:01:53,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:53,918 INFO L124 PetriNetUnfolderBase]: 888/1394 cut-off events. [2024-06-03 20:01:53,918 INFO L125 PetriNetUnfolderBase]: For 732/732 co-relation queries the response was YES. [2024-06-03 20:01:53,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3499 conditions, 1394 events. 888/1394 cut-off events. For 732/732 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6708 event pairs, 408 based on Foata normal form. 4/1397 useless extension candidates. Maximal degree in co-relation 3482. Up to 1326 conditions per place. [2024-06-03 20:01:53,924 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 40 selfloop transitions, 8 changer transitions 0/54 dead transitions. [2024-06-03 20:01:53,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 54 transitions, 275 flow [2024-06-03 20:01:53,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:01:53,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:01:53,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-03 20:01:53,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-03 20:01:53,926 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 123 flow. Second operand 5 states and 100 transitions. [2024-06-03 20:01:53,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 54 transitions, 275 flow [2024-06-03 20:01:53,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 258 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 20:01:53,928 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 172 flow [2024-06-03 20:01:53,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2024-06-03 20:01:53,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-03 20:01:53,929 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 172 flow [2024-06-03 20:01:53,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:01:53,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:53,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:53,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:01:53,930 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:01:53,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:53,930 INFO L85 PathProgramCache]: Analyzing trace with hash 907853390, now seen corresponding path program 1 times [2024-06-03 20:01:53,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:53,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565918048] [2024-06-03 20:01:53,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:53,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:54,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:54,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565918048] [2024-06-03 20:01:54,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565918048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:54,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:54,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:01:54,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223338957] [2024-06-03 20:01:54,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:54,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:01:54,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:54,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:01:54,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:01:54,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-03 20:01:54,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:01:54,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:54,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-03 20:01:54,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:55,280 INFO L124 PetriNetUnfolderBase]: 894/1405 cut-off events. [2024-06-03 20:01:55,281 INFO L125 PetriNetUnfolderBase]: For 1403/1403 co-relation queries the response was YES. [2024-06-03 20:01:55,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4034 conditions, 1405 events. 894/1405 cut-off events. For 1403/1403 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6786 event pairs, 393 based on Foata normal form. 4/1408 useless extension candidates. Maximal degree in co-relation 4014. Up to 1317 conditions per place. [2024-06-03 20:01:55,288 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 44 selfloop transitions, 12 changer transitions 0/62 dead transitions. [2024-06-03 20:01:55,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 62 transitions, 346 flow [2024-06-03 20:01:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:01:55,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:01:55,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-03 20:01:55,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483739837398374 [2024-06-03 20:01:55,289 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 172 flow. Second operand 6 states and 119 transitions. [2024-06-03 20:01:55,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 62 transitions, 346 flow [2024-06-03 20:01:55,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 62 transitions, 332 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 20:01:55,292 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 219 flow [2024-06-03 20:01:55,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=219, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-03 20:01:55,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-03 20:01:55,293 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 219 flow [2024-06-03 20:01:55,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:01:55,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:55,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:55,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:01:55,294 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:01:55,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:55,294 INFO L85 PathProgramCache]: Analyzing trace with hash 391280115, now seen corresponding path program 1 times [2024-06-03 20:01:55,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:55,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987281300] [2024-06-03 20:01:55,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:55,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:56,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:56,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:56,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987281300] [2024-06-03 20:01:56,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987281300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:56,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:56,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:01:56,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123675040] [2024-06-03 20:01:56,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:56,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:01:56,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:56,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:01:56,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:01:56,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 20:01:56,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 219 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:01:56,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:56,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 20:01:56,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:56,436 INFO L124 PetriNetUnfolderBase]: 1128/1755 cut-off events. [2024-06-03 20:01:56,436 INFO L125 PetriNetUnfolderBase]: For 2836/2836 co-relation queries the response was YES. [2024-06-03 20:01:56,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5487 conditions, 1755 events. 1128/1755 cut-off events. For 2836/2836 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8284 event pairs, 441 based on Foata normal form. 2/1756 useless extension candidates. Maximal degree in co-relation 5465. Up to 1625 conditions per place. [2024-06-03 20:01:56,446 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 45 selfloop transitions, 13 changer transitions 0/63 dead transitions. [2024-06-03 20:01:56,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 63 transitions, 395 flow [2024-06-03 20:01:56,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:01:56,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:01:56,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-03 20:01:56,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-03 20:01:56,448 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 219 flow. Second operand 5 states and 99 transitions. [2024-06-03 20:01:56,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 63 transitions, 395 flow [2024-06-03 20:01:56,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 63 transitions, 364 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 20:01:56,451 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 254 flow [2024-06-03 20:01:56,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2024-06-03 20:01:56,452 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-03 20:01:56,452 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 254 flow [2024-06-03 20:01:56,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:01:56,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:56,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:56,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:01:56,453 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:01:56,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:56,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1150160483, now seen corresponding path program 1 times [2024-06-03 20:01:56,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:56,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469282829] [2024-06-03 20:01:56,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:56,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:57,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:57,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469282829] [2024-06-03 20:01:57,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469282829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:57,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:57,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:01:57,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854612991] [2024-06-03 20:01:57,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:57,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:01:57,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:57,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:01:57,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:01:57,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 20:01:57,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 254 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:01:57,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:57,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 20:01:57,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:58,356 INFO L124 PetriNetUnfolderBase]: 1062/1628 cut-off events. [2024-06-03 20:01:58,357 INFO L125 PetriNetUnfolderBase]: For 4161/4161 co-relation queries the response was YES. [2024-06-03 20:01:58,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5632 conditions, 1628 events. 1062/1628 cut-off events. For 4161/4161 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7815 event pairs, 439 based on Foata normal form. 4/1631 useless extension candidates. Maximal degree in co-relation 5609. Up to 1529 conditions per place. [2024-06-03 20:01:58,366 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 56 selfloop transitions, 20 changer transitions 0/81 dead transitions. [2024-06-03 20:01:58,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 81 transitions, 514 flow [2024-06-03 20:01:58,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:01:58,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:01:58,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:01:58,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-03 20:01:58,368 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 254 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:01:58,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 81 transitions, 514 flow [2024-06-03 20:01:58,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 81 transitions, 476 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 20:01:58,373 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 324 flow [2024-06-03 20:01:58,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=324, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-03 20:01:58,376 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-03 20:01:58,376 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 324 flow [2024-06-03 20:01:58,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:01:58,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:58,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:58,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:01:58,377 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:01:58,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:58,377 INFO L85 PathProgramCache]: Analyzing trace with hash 153108005, now seen corresponding path program 1 times [2024-06-03 20:01:58,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:58,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316791162] [2024-06-03 20:01:58,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:58,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:01:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:01:58,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:01:58,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316791162] [2024-06-03 20:01:58,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316791162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:01:59,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:01:59,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:01:59,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202278109] [2024-06-03 20:01:59,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:01:59,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:01:59,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:01:59,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:01:59,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:01:59,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:01:59,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 324 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:01:59,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:01:59,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:01:59,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:01:59,415 INFO L124 PetriNetUnfolderBase]: 1330/2019 cut-off events. [2024-06-03 20:01:59,416 INFO L125 PetriNetUnfolderBase]: For 4745/4745 co-relation queries the response was YES. [2024-06-03 20:01:59,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7062 conditions, 2019 events. 1330/2019 cut-off events. For 4745/4745 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9378 event pairs, 474 based on Foata normal form. 2/2021 useless extension candidates. Maximal degree in co-relation 7037. Up to 1987 conditions per place. [2024-06-03 20:01:59,426 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 60 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2024-06-03 20:01:59,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 514 flow [2024-06-03 20:01:59,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:01:59,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:01:59,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-03 20:01:59,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-03 20:01:59,429 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 324 flow. Second operand 5 states and 88 transitions. [2024-06-03 20:01:59,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 514 flow [2024-06-03 20:01:59,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 459 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 20:01:59,433 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 337 flow [2024-06-03 20:01:59,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=337, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2024-06-03 20:01:59,434 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-03 20:01:59,435 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 337 flow [2024-06-03 20:01:59,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:01:59,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:01:59,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:01:59,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:01:59,435 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:01:59,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:01:59,436 INFO L85 PathProgramCache]: Analyzing trace with hash 215433273, now seen corresponding path program 1 times [2024-06-03 20:01:59,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:01:59,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825849707] [2024-06-03 20:01:59,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:01:59,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:01:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:00,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:00,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825849707] [2024-06-03 20:02:00,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825849707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:00,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:00,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:02:00,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045461065] [2024-06-03 20:02:00,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:00,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:02:00,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:00,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:02:00,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:02:00,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 20:02:00,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 337 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:00,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:00,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 20:02:00,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:01,311 INFO L124 PetriNetUnfolderBase]: 1281/1989 cut-off events. [2024-06-03 20:02:01,311 INFO L125 PetriNetUnfolderBase]: For 5428/5428 co-relation queries the response was YES. [2024-06-03 20:02:01,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7243 conditions, 1989 events. 1281/1989 cut-off events. For 5428/5428 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9673 event pairs, 429 based on Foata normal form. 2/1990 useless extension candidates. Maximal degree in co-relation 7216. Up to 1803 conditions per place. [2024-06-03 20:02:01,322 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 53 selfloop transitions, 25 changer transitions 0/84 dead transitions. [2024-06-03 20:02:01,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 84 transitions, 573 flow [2024-06-03 20:02:01,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:02:01,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:02:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-03 20:02:01,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-03 20:02:01,324 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 337 flow. Second operand 6 states and 118 transitions. [2024-06-03 20:02:01,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 84 transitions, 573 flow [2024-06-03 20:02:01,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 84 transitions, 567 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-03 20:02:01,327 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 429 flow [2024-06-03 20:02:01,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=429, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2024-06-03 20:02:01,328 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2024-06-03 20:02:01,328 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 429 flow [2024-06-03 20:02:01,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:01,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:01,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:01,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:02:01,329 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:01,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:01,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1161567413, now seen corresponding path program 2 times [2024-06-03 20:02:01,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:01,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157190005] [2024-06-03 20:02:01,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:01,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:02,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:02,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157190005] [2024-06-03 20:02:02,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157190005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:02,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:02,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:02:02,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971583018] [2024-06-03 20:02:02,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:02,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:02:02,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:02,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:02:02,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:02:02,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 20:02:02,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 429 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:02,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:02,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 20:02:02,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:03,450 INFO L124 PetriNetUnfolderBase]: 1394/2182 cut-off events. [2024-06-03 20:02:03,450 INFO L125 PetriNetUnfolderBase]: For 8144/8144 co-relation queries the response was YES. [2024-06-03 20:02:03,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8720 conditions, 2182 events. 1394/2182 cut-off events. For 8144/8144 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10797 event pairs, 427 based on Foata normal form. 4/2186 useless extension candidates. Maximal degree in co-relation 8690. Up to 1976 conditions per place. [2024-06-03 20:02:03,462 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 85 selfloop transitions, 34 changer transitions 0/125 dead transitions. [2024-06-03 20:02:03,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 125 transitions, 973 flow [2024-06-03 20:02:03,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:02:03,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:02:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-03 20:02:03,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434589800443459 [2024-06-03 20:02:03,480 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 429 flow. Second operand 11 states and 200 transitions. [2024-06-03 20:02:03,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 125 transitions, 973 flow [2024-06-03 20:02:03,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 125 transitions, 895 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 20:02:03,487 INFO L231 Difference]: Finished difference. Result has 76 places, 92 transitions, 700 flow [2024-06-03 20:02:03,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=700, PETRI_PLACES=76, PETRI_TRANSITIONS=92} [2024-06-03 20:02:03,488 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-03 20:02:03,488 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 92 transitions, 700 flow [2024-06-03 20:02:03,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:03,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:03,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:03,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:02:03,489 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:03,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:03,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1502166057, now seen corresponding path program 3 times [2024-06-03 20:02:03,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:03,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612545621] [2024-06-03 20:02:03,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:03,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:04,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:04,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612545621] [2024-06-03 20:02:04,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612545621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:04,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:04,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:02:04,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177063430] [2024-06-03 20:02:04,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:04,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:02:04,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:04,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:02:04,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:02:04,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 20:02:04,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 92 transitions, 700 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:04,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:04,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 20:02:04,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:05,271 INFO L124 PetriNetUnfolderBase]: 1382/2162 cut-off events. [2024-06-03 20:02:05,272 INFO L125 PetriNetUnfolderBase]: For 11004/11008 co-relation queries the response was YES. [2024-06-03 20:02:05,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9386 conditions, 2162 events. 1382/2162 cut-off events. For 11004/11008 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10657 event pairs, 422 based on Foata normal form. 8/2170 useless extension candidates. Maximal degree in co-relation 9351. Up to 1874 conditions per place. [2024-06-03 20:02:05,285 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 69 selfloop transitions, 42 changer transitions 0/117 dead transitions. [2024-06-03 20:02:05,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 117 transitions, 1044 flow [2024-06-03 20:02:05,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:02:05,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:02:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-03 20:02:05,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-03 20:02:05,287 INFO L175 Difference]: Start difference. First operand has 76 places, 92 transitions, 700 flow. Second operand 7 states and 134 transitions. [2024-06-03 20:02:05,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 117 transitions, 1044 flow [2024-06-03 20:02:05,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 117 transitions, 985 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 20:02:05,299 INFO L231 Difference]: Finished difference. Result has 79 places, 95 transitions, 783 flow [2024-06-03 20:02:05,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=783, PETRI_PLACES=79, PETRI_TRANSITIONS=95} [2024-06-03 20:02:05,300 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-03 20:02:05,300 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 95 transitions, 783 flow [2024-06-03 20:02:05,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:05,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:05,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:05,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:02:05,300 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:05,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:05,301 INFO L85 PathProgramCache]: Analyzing trace with hash 452245790, now seen corresponding path program 1 times [2024-06-03 20:02:05,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:05,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967211020] [2024-06-03 20:02:05,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:05,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:06,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:06,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:06,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967211020] [2024-06-03 20:02:06,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967211020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:06,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:06,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:02:06,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057300365] [2024-06-03 20:02:06,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:06,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:02:06,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:06,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:02:06,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:02:06,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 20:02:06,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 95 transitions, 783 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:06,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:06,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 20:02:06,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:06,827 INFO L124 PetriNetUnfolderBase]: 1414/2233 cut-off events. [2024-06-03 20:02:06,827 INFO L125 PetriNetUnfolderBase]: For 14896/14897 co-relation queries the response was YES. [2024-06-03 20:02:06,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10280 conditions, 2233 events. 1414/2233 cut-off events. For 14896/14897 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10989 event pairs, 436 based on Foata normal form. 28/2257 useless extension candidates. Maximal degree in co-relation 10245. Up to 1805 conditions per place. [2024-06-03 20:02:06,841 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 78 selfloop transitions, 41 changer transitions 0/126 dead transitions. [2024-06-03 20:02:06,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 126 transitions, 1173 flow [2024-06-03 20:02:06,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:02:06,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:02:06,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 20:02:06,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-03 20:02:06,843 INFO L175 Difference]: Start difference. First operand has 79 places, 95 transitions, 783 flow. Second operand 8 states and 154 transitions. [2024-06-03 20:02:06,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 126 transitions, 1173 flow [2024-06-03 20:02:06,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 126 transitions, 1057 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 20:02:06,863 INFO L231 Difference]: Finished difference. Result has 82 places, 97 transitions, 795 flow [2024-06-03 20:02:06,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=795, PETRI_PLACES=82, PETRI_TRANSITIONS=97} [2024-06-03 20:02:06,863 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-03 20:02:06,863 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 97 transitions, 795 flow [2024-06-03 20:02:06,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:06,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:06,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:06,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:02:06,864 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:06,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:06,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1939763278, now seen corresponding path program 1 times [2024-06-03 20:02:06,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:06,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229759794] [2024-06-03 20:02:06,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:06,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:07,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:07,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229759794] [2024-06-03 20:02:07,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229759794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:07,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:07,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:02:07,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127814832] [2024-06-03 20:02:07,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:07,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:02:07,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:07,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:02:07,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:02:07,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 20:02:07,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 97 transitions, 795 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:07,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:07,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 20:02:07,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:08,320 INFO L124 PetriNetUnfolderBase]: 1458/2288 cut-off events. [2024-06-03 20:02:08,320 INFO L125 PetriNetUnfolderBase]: For 13263/13263 co-relation queries the response was YES. [2024-06-03 20:02:08,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10305 conditions, 2288 events. 1458/2288 cut-off events. For 13263/13263 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11439 event pairs, 300 based on Foata normal form. 4/2291 useless extension candidates. Maximal degree in co-relation 10269. Up to 2082 conditions per place. [2024-06-03 20:02:08,331 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 95 selfloop transitions, 15 changer transitions 0/116 dead transitions. [2024-06-03 20:02:08,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 116 transitions, 1093 flow [2024-06-03 20:02:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:02:08,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:02:08,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-03 20:02:08,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-03 20:02:08,333 INFO L175 Difference]: Start difference. First operand has 82 places, 97 transitions, 795 flow. Second operand 6 states and 114 transitions. [2024-06-03 20:02:08,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 116 transitions, 1093 flow [2024-06-03 20:02:08,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 116 transitions, 1011 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 20:02:08,348 INFO L231 Difference]: Finished difference. Result has 82 places, 99 transitions, 776 flow [2024-06-03 20:02:08,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=776, PETRI_PLACES=82, PETRI_TRANSITIONS=99} [2024-06-03 20:02:08,349 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-03 20:02:08,349 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 99 transitions, 776 flow [2024-06-03 20:02:08,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:08,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:08,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:08,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:02:08,351 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:08,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:08,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1657723726, now seen corresponding path program 2 times [2024-06-03 20:02:08,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:08,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110387884] [2024-06-03 20:02:08,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:08,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:09,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:09,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110387884] [2024-06-03 20:02:09,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110387884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:09,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:09,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:02:09,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376533119] [2024-06-03 20:02:09,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:09,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:02:09,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:09,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:02:09,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:02:09,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 20:02:09,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 99 transitions, 776 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:09,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:09,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 20:02:09,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:09,747 INFO L124 PetriNetUnfolderBase]: 1475/2313 cut-off events. [2024-06-03 20:02:09,747 INFO L125 PetriNetUnfolderBase]: For 14650/14650 co-relation queries the response was YES. [2024-06-03 20:02:09,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10504 conditions, 2313 events. 1475/2313 cut-off events. For 14650/14650 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11646 event pairs, 399 based on Foata normal form. 4/2316 useless extension candidates. Maximal degree in co-relation 10467. Up to 2101 conditions per place. [2024-06-03 20:02:09,761 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 96 selfloop transitions, 24 changer transitions 0/126 dead transitions. [2024-06-03 20:02:09,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 126 transitions, 1187 flow [2024-06-03 20:02:09,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:02:09,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:02:09,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-03 20:02:09,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-03 20:02:09,763 INFO L175 Difference]: Start difference. First operand has 82 places, 99 transitions, 776 flow. Second operand 6 states and 116 transitions. [2024-06-03 20:02:09,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 126 transitions, 1187 flow [2024-06-03 20:02:09,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 126 transitions, 1142 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 20:02:09,780 INFO L231 Difference]: Finished difference. Result has 85 places, 108 transitions, 926 flow [2024-06-03 20:02:09,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=926, PETRI_PLACES=85, PETRI_TRANSITIONS=108} [2024-06-03 20:02:09,781 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-03 20:02:09,781 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 108 transitions, 926 flow [2024-06-03 20:02:09,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:09,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:09,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:09,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:02:09,782 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:09,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:09,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1170859604, now seen corresponding path program 3 times [2024-06-03 20:02:09,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:09,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733340310] [2024-06-03 20:02:09,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:09,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:10,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:10,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733340310] [2024-06-03 20:02:10,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733340310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:10,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:10,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:02:10,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194248360] [2024-06-03 20:02:10,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:10,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:02:10,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:10,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:02:10,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:02:10,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 20:02:10,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 108 transitions, 926 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:10,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:10,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 20:02:10,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:11,220 INFO L124 PetriNetUnfolderBase]: 1467/2305 cut-off events. [2024-06-03 20:02:11,220 INFO L125 PetriNetUnfolderBase]: For 17109/17113 co-relation queries the response was YES. [2024-06-03 20:02:11,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10862 conditions, 2305 events. 1467/2305 cut-off events. For 17109/17113 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11627 event pairs, 390 based on Foata normal form. 8/2313 useless extension candidates. Maximal degree in co-relation 10823. Up to 2083 conditions per place. [2024-06-03 20:02:11,236 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 94 selfloop transitions, 32 changer transitions 0/132 dead transitions. [2024-06-03 20:02:11,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 132 transitions, 1286 flow [2024-06-03 20:02:11,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:02:11,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:02:11,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-03 20:02:11,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-03 20:02:11,238 INFO L175 Difference]: Start difference. First operand has 85 places, 108 transitions, 926 flow. Second operand 7 states and 131 transitions. [2024-06-03 20:02:11,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 132 transitions, 1286 flow [2024-06-03 20:02:11,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 132 transitions, 1197 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-03 20:02:11,259 INFO L231 Difference]: Finished difference. Result has 88 places, 110 transitions, 945 flow [2024-06-03 20:02:11,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=945, PETRI_PLACES=88, PETRI_TRANSITIONS=110} [2024-06-03 20:02:11,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-03 20:02:11,259 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 110 transitions, 945 flow [2024-06-03 20:02:11,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:11,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:11,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:11,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:02:11,260 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:11,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:11,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1342611946, now seen corresponding path program 1 times [2024-06-03 20:02:11,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:11,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977156597] [2024-06-03 20:02:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:11,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:11,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:11,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977156597] [2024-06-03 20:02:11,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977156597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:11,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:11,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:02:11,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024777221] [2024-06-03 20:02:11,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:11,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:02:11,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:11,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:02:11,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:02:11,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:11,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 110 transitions, 945 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:11,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:11,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:11,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:12,387 INFO L124 PetriNetUnfolderBase]: 1568/2418 cut-off events. [2024-06-03 20:02:12,388 INFO L125 PetriNetUnfolderBase]: For 19564/19564 co-relation queries the response was YES. [2024-06-03 20:02:12,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11530 conditions, 2418 events. 1568/2418 cut-off events. For 19564/19564 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11824 event pairs, 438 based on Foata normal form. 4/2421 useless extension candidates. Maximal degree in co-relation 11490. Up to 2293 conditions per place. [2024-06-03 20:02:12,401 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 102 selfloop transitions, 17 changer transitions 0/123 dead transitions. [2024-06-03 20:02:12,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 123 transitions, 1251 flow [2024-06-03 20:02:12,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:02:12,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:02:12,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-03 20:02:12,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-03 20:02:12,403 INFO L175 Difference]: Start difference. First operand has 88 places, 110 transitions, 945 flow. Second operand 5 states and 92 transitions. [2024-06-03 20:02:12,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 123 transitions, 1251 flow [2024-06-03 20:02:12,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 123 transitions, 1159 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-03 20:02:12,427 INFO L231 Difference]: Finished difference. Result has 89 places, 113 transitions, 931 flow [2024-06-03 20:02:12,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=931, PETRI_PLACES=89, PETRI_TRANSITIONS=113} [2024-06-03 20:02:12,429 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-03 20:02:12,429 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 113 transitions, 931 flow [2024-06-03 20:02:12,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:12,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:12,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:12,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:02:12,430 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:12,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:12,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2106512106, now seen corresponding path program 2 times [2024-06-03 20:02:12,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:12,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454400576] [2024-06-03 20:02:12,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:12,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:12,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:12,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454400576] [2024-06-03 20:02:12,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454400576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:12,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:12,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:02:12,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854439544] [2024-06-03 20:02:12,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:12,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:02:12,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:12,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:02:12,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:02:13,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:13,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 113 transitions, 931 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:13,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:13,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:13,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:13,512 INFO L124 PetriNetUnfolderBase]: 1556/2402 cut-off events. [2024-06-03 20:02:13,512 INFO L125 PetriNetUnfolderBase]: For 20782/20782 co-relation queries the response was YES. [2024-06-03 20:02:13,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11723 conditions, 2402 events. 1556/2402 cut-off events. For 20782/20782 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11728 event pairs, 436 based on Foata normal form. 4/2405 useless extension candidates. Maximal degree in co-relation 11682. Up to 2261 conditions per place. [2024-06-03 20:02:13,526 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 105 selfloop transitions, 20 changer transitions 0/129 dead transitions. [2024-06-03 20:02:13,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 129 transitions, 1273 flow [2024-06-03 20:02:13,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:02:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:02:13,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-03 20:02:13,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-03 20:02:13,528 INFO L175 Difference]: Start difference. First operand has 89 places, 113 transitions, 931 flow. Second operand 6 states and 107 transitions. [2024-06-03 20:02:13,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 129 transitions, 1273 flow [2024-06-03 20:02:13,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 129 transitions, 1227 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-03 20:02:13,551 INFO L231 Difference]: Finished difference. Result has 92 places, 116 transitions, 969 flow [2024-06-03 20:02:13,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=969, PETRI_PLACES=92, PETRI_TRANSITIONS=116} [2024-06-03 20:02:13,551 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-03 20:02:13,552 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 116 transitions, 969 flow [2024-06-03 20:02:13,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:13,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:13,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:13,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:02:13,554 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:13,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:13,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1879240980, now seen corresponding path program 1 times [2024-06-03 20:02:13,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:13,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163381614] [2024-06-03 20:02:13,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:13,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:14,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:14,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163381614] [2024-06-03 20:02:14,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163381614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:14,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:14,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:02:14,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159983012] [2024-06-03 20:02:14,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:14,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:02:14,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:14,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:02:14,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:02:14,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:14,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 116 transitions, 969 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:14,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:14,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:14,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:14,577 INFO L124 PetriNetUnfolderBase]: 1574/2429 cut-off events. [2024-06-03 20:02:14,577 INFO L125 PetriNetUnfolderBase]: For 20981/20981 co-relation queries the response was YES. [2024-06-03 20:02:14,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11939 conditions, 2429 events. 1574/2429 cut-off events. For 20981/20981 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11833 event pairs, 448 based on Foata normal form. 2/2431 useless extension candidates. Maximal degree in co-relation 11897. Up to 2340 conditions per place. [2024-06-03 20:02:14,591 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 123 selfloop transitions, 15 changer transitions 0/142 dead transitions. [2024-06-03 20:02:14,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 142 transitions, 1401 flow [2024-06-03 20:02:14,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:02:14,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:02:14,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-03 20:02:14,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 20:02:14,592 INFO L175 Difference]: Start difference. First operand has 92 places, 116 transitions, 969 flow. Second operand 6 states and 108 transitions. [2024-06-03 20:02:14,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 142 transitions, 1401 flow [2024-06-03 20:02:14,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 142 transitions, 1344 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 20:02:14,616 INFO L231 Difference]: Finished difference. Result has 96 places, 127 transitions, 1061 flow [2024-06-03 20:02:14,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1061, PETRI_PLACES=96, PETRI_TRANSITIONS=127} [2024-06-03 20:02:14,617 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-03 20:02:14,617 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 127 transitions, 1061 flow [2024-06-03 20:02:14,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:14,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:14,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:14,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:02:14,618 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:14,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:14,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1915429140, now seen corresponding path program 2 times [2024-06-03 20:02:14,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:14,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713329252] [2024-06-03 20:02:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:14,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:15,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:15,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713329252] [2024-06-03 20:02:15,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713329252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:15,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:15,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:02:15,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720503610] [2024-06-03 20:02:15,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:15,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:02:15,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:15,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:02:15,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:02:15,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:15,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 127 transitions, 1061 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:15,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:15,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:15,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:15,681 INFO L124 PetriNetUnfolderBase]: 1568/2419 cut-off events. [2024-06-03 20:02:15,681 INFO L125 PetriNetUnfolderBase]: For 22870/22870 co-relation queries the response was YES. [2024-06-03 20:02:15,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12381 conditions, 2419 events. 1568/2419 cut-off events. For 22870/22870 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11790 event pairs, 448 based on Foata normal form. 2/2421 useless extension candidates. Maximal degree in co-relation 12336. Up to 2350 conditions per place. [2024-06-03 20:02:15,694 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 123 selfloop transitions, 11 changer transitions 0/138 dead transitions. [2024-06-03 20:02:15,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 138 transitions, 1368 flow [2024-06-03 20:02:15,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:02:15,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:02:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-03 20:02:15,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-03 20:02:15,697 INFO L175 Difference]: Start difference. First operand has 96 places, 127 transitions, 1061 flow. Second operand 6 states and 101 transitions. [2024-06-03 20:02:15,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 138 transitions, 1368 flow [2024-06-03 20:02:15,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 138 transitions, 1334 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-03 20:02:15,724 INFO L231 Difference]: Finished difference. Result has 101 places, 128 transitions, 1064 flow [2024-06-03 20:02:15,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1064, PETRI_PLACES=101, PETRI_TRANSITIONS=128} [2024-06-03 20:02:15,725 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-03 20:02:15,725 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 128 transitions, 1064 flow [2024-06-03 20:02:15,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:15,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:15,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:15,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:02:15,725 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:15,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:15,726 INFO L85 PathProgramCache]: Analyzing trace with hash -2106497226, now seen corresponding path program 1 times [2024-06-03 20:02:15,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:15,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979882104] [2024-06-03 20:02:15,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:15,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:16,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:16,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979882104] [2024-06-03 20:02:16,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979882104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:16,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:16,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:02:16,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681488069] [2024-06-03 20:02:16,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:16,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:02:16,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:16,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:02:16,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:02:16,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:16,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 128 transitions, 1064 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:16,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:16,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:16,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:16,911 INFO L124 PetriNetUnfolderBase]: 1563/2412 cut-off events. [2024-06-03 20:02:16,911 INFO L125 PetriNetUnfolderBase]: For 24303/24303 co-relation queries the response was YES. [2024-06-03 20:02:16,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12464 conditions, 2412 events. 1563/2412 cut-off events. For 24303/24303 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11696 event pairs, 447 based on Foata normal form. 2/2414 useless extension candidates. Maximal degree in co-relation 12416. Up to 2340 conditions per place. [2024-06-03 20:02:16,923 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 124 selfloop transitions, 12 changer transitions 0/140 dead transitions. [2024-06-03 20:02:16,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 140 transitions, 1382 flow [2024-06-03 20:02:16,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:02:16,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:02:16,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-03 20:02:16,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-03 20:02:16,925 INFO L175 Difference]: Start difference. First operand has 101 places, 128 transitions, 1064 flow. Second operand 6 states and 101 transitions. [2024-06-03 20:02:16,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 140 transitions, 1382 flow [2024-06-03 20:02:16,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 140 transitions, 1360 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-03 20:02:16,953 INFO L231 Difference]: Finished difference. Result has 103 places, 130 transitions, 1091 flow [2024-06-03 20:02:16,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1091, PETRI_PLACES=103, PETRI_TRANSITIONS=130} [2024-06-03 20:02:16,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 61 predicate places. [2024-06-03 20:02:16,953 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 130 transitions, 1091 flow [2024-06-03 20:02:16,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:16,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:16,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:16,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:02:16,954 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:16,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:16,954 INFO L85 PathProgramCache]: Analyzing trace with hash -306647890, now seen corresponding path program 1 times [2024-06-03 20:02:16,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:16,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187817539] [2024-06-03 20:02:16,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:16,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:18,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:18,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187817539] [2024-06-03 20:02:18,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187817539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:18,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:18,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:02:18,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705885822] [2024-06-03 20:02:18,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:18,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:02:18,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:18,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:02:18,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:02:18,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 20:02:18,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 130 transitions, 1091 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:18,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:18,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 20:02:18,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:18,622 INFO L124 PetriNetUnfolderBase]: 1565/2464 cut-off events. [2024-06-03 20:02:18,623 INFO L125 PetriNetUnfolderBase]: For 29287/29287 co-relation queries the response was YES. [2024-06-03 20:02:18,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13083 conditions, 2464 events. 1565/2464 cut-off events. For 29287/29287 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12391 event pairs, 286 based on Foata normal form. 16/2479 useless extension candidates. Maximal degree in co-relation 13035. Up to 2164 conditions per place. [2024-06-03 20:02:18,638 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 134 selfloop transitions, 16 changer transitions 0/156 dead transitions. [2024-06-03 20:02:18,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 156 transitions, 1501 flow [2024-06-03 20:02:18,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:02:18,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:02:18,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 20:02:18,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-03 20:02:18,640 INFO L175 Difference]: Start difference. First operand has 103 places, 130 transitions, 1091 flow. Second operand 7 states and 133 transitions. [2024-06-03 20:02:18,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 156 transitions, 1501 flow [2024-06-03 20:02:18,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 156 transitions, 1468 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 20:02:18,671 INFO L231 Difference]: Finished difference. Result has 106 places, 131 transitions, 1122 flow [2024-06-03 20:02:18,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1122, PETRI_PLACES=106, PETRI_TRANSITIONS=131} [2024-06-03 20:02:18,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-03 20:02:18,672 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 131 transitions, 1122 flow [2024-06-03 20:02:18,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:18,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:18,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:18,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:02:18,673 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:18,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:18,674 INFO L85 PathProgramCache]: Analyzing trace with hash -746576760, now seen corresponding path program 2 times [2024-06-03 20:02:18,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:18,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232194690] [2024-06-03 20:02:18,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:18,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:19,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:19,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232194690] [2024-06-03 20:02:19,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232194690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:19,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:19,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:02:19,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170796648] [2024-06-03 20:02:19,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:19,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:02:19,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:19,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:02:19,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:02:19,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 20:02:19,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 131 transitions, 1122 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:19,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:19,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 20:02:19,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:20,429 INFO L124 PetriNetUnfolderBase]: 1626/2591 cut-off events. [2024-06-03 20:02:20,429 INFO L125 PetriNetUnfolderBase]: For 32943/32943 co-relation queries the response was YES. [2024-06-03 20:02:20,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13853 conditions, 2591 events. 1626/2591 cut-off events. For 32943/32943 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13422 event pairs, 364 based on Foata normal form. 22/2612 useless extension candidates. Maximal degree in co-relation 13804. Up to 1923 conditions per place. [2024-06-03 20:02:20,446 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 97 selfloop transitions, 58 changer transitions 0/161 dead transitions. [2024-06-03 20:02:20,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 161 transitions, 1622 flow [2024-06-03 20:02:20,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:02:20,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:02:20,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-03 20:02:20,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49825783972125437 [2024-06-03 20:02:20,448 INFO L175 Difference]: Start difference. First operand has 106 places, 131 transitions, 1122 flow. Second operand 7 states and 143 transitions. [2024-06-03 20:02:20,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 161 transitions, 1622 flow [2024-06-03 20:02:20,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 161 transitions, 1578 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 20:02:20,486 INFO L231 Difference]: Finished difference. Result has 109 places, 135 transitions, 1324 flow [2024-06-03 20:02:20,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1324, PETRI_PLACES=109, PETRI_TRANSITIONS=135} [2024-06-03 20:02:20,487 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-03 20:02:20,487 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 135 transitions, 1324 flow [2024-06-03 20:02:20,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:20,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:20,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:20,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:02:20,488 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:20,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:20,488 INFO L85 PathProgramCache]: Analyzing trace with hash -746724630, now seen corresponding path program 3 times [2024-06-03 20:02:20,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:20,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361009240] [2024-06-03 20:02:20,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:20,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:21,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:21,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361009240] [2024-06-03 20:02:21,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361009240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:21,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:21,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:02:21,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266858150] [2024-06-03 20:02:21,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:21,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:02:21,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:21,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:02:21,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:02:21,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 20:02:21,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 135 transitions, 1324 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:21,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:21,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 20:02:21,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:22,363 INFO L124 PetriNetUnfolderBase]: 1695/2714 cut-off events. [2024-06-03 20:02:22,363 INFO L125 PetriNetUnfolderBase]: For 41047/41047 co-relation queries the response was YES. [2024-06-03 20:02:22,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15380 conditions, 2714 events. 1695/2714 cut-off events. For 41047/41047 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14287 event pairs, 389 based on Foata normal form. 16/2729 useless extension candidates. Maximal degree in co-relation 15329. Up to 2317 conditions per place. [2024-06-03 20:02:22,383 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 115 selfloop transitions, 39 changer transitions 0/160 dead transitions. [2024-06-03 20:02:22,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 160 transitions, 1746 flow [2024-06-03 20:02:22,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:02:22,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:02:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-03 20:02:22,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-03 20:02:22,384 INFO L175 Difference]: Start difference. First operand has 109 places, 135 transitions, 1324 flow. Second operand 7 states and 135 transitions. [2024-06-03 20:02:22,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 160 transitions, 1746 flow [2024-06-03 20:02:22,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 160 transitions, 1669 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-03 20:02:22,453 INFO L231 Difference]: Finished difference. Result has 113 places, 136 transitions, 1362 flow [2024-06-03 20:02:22,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1362, PETRI_PLACES=113, PETRI_TRANSITIONS=136} [2024-06-03 20:02:22,453 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-03 20:02:22,453 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 136 transitions, 1362 flow [2024-06-03 20:02:22,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:22,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:22,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:22,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:02:22,454 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:22,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:22,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1942420548, now seen corresponding path program 4 times [2024-06-03 20:02:22,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:22,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249999784] [2024-06-03 20:02:22,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:22,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:23,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:23,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249999784] [2024-06-03 20:02:23,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249999784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:23,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:23,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:02:23,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143006119] [2024-06-03 20:02:23,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:23,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:02:23,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:23,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:02:23,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:02:23,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-03 20:02:23,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 136 transitions, 1362 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:23,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:23,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-03 20:02:23,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:24,462 INFO L124 PetriNetUnfolderBase]: 1752/2812 cut-off events. [2024-06-03 20:02:24,462 INFO L125 PetriNetUnfolderBase]: For 45896/45900 co-relation queries the response was YES. [2024-06-03 20:02:24,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16026 conditions, 2812 events. 1752/2812 cut-off events. For 45896/45900 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15059 event pairs, 404 based on Foata normal form. 30/2842 useless extension candidates. Maximal degree in co-relation 15973. Up to 2290 conditions per place. [2024-06-03 20:02:24,482 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 108 selfloop transitions, 60 changer transitions 0/174 dead transitions. [2024-06-03 20:02:24,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 174 transitions, 2040 flow [2024-06-03 20:02:24,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:02:24,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:02:24,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-03 20:02:24,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-03 20:02:24,486 INFO L175 Difference]: Start difference. First operand has 113 places, 136 transitions, 1362 flow. Second operand 8 states and 160 transitions. [2024-06-03 20:02:24,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 174 transitions, 2040 flow [2024-06-03 20:02:24,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 174 transitions, 1947 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 20:02:24,539 INFO L231 Difference]: Finished difference. Result has 118 places, 144 transitions, 1608 flow [2024-06-03 20:02:24,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1608, PETRI_PLACES=118, PETRI_TRANSITIONS=144} [2024-06-03 20:02:24,540 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-03 20:02:24,540 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 144 transitions, 1608 flow [2024-06-03 20:02:24,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:24,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:24,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:24,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:02:24,540 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:24,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:24,541 INFO L85 PathProgramCache]: Analyzing trace with hash 195146950, now seen corresponding path program 1 times [2024-06-03 20:02:24,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:24,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558052042] [2024-06-03 20:02:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:24,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:25,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:25,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558052042] [2024-06-03 20:02:25,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558052042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:25,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:25,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:02:25,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194060093] [2024-06-03 20:02:25,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:25,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:02:25,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:25,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:02:25,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:02:26,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:26,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 144 transitions, 1608 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:26,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:26,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:26,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:26,709 INFO L124 PetriNetUnfolderBase]: 1902/2987 cut-off events. [2024-06-03 20:02:26,710 INFO L125 PetriNetUnfolderBase]: For 51306/51310 co-relation queries the response was YES. [2024-06-03 20:02:26,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17922 conditions, 2987 events. 1902/2987 cut-off events. For 51306/51310 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15566 event pairs, 462 based on Foata normal form. 6/2993 useless extension candidates. Maximal degree in co-relation 17866. Up to 2652 conditions per place. [2024-06-03 20:02:26,730 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 120 selfloop transitions, 63 changer transitions 0/187 dead transitions. [2024-06-03 20:02:26,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 187 transitions, 2254 flow [2024-06-03 20:02:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:02:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:02:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 20:02:26,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 20:02:26,732 INFO L175 Difference]: Start difference. First operand has 118 places, 144 transitions, 1608 flow. Second operand 9 states and 162 transitions. [2024-06-03 20:02:26,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 187 transitions, 2254 flow [2024-06-03 20:02:26,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 187 transitions, 2158 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-03 20:02:26,808 INFO L231 Difference]: Finished difference. Result has 125 places, 158 transitions, 1843 flow [2024-06-03 20:02:26,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1512, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1843, PETRI_PLACES=125, PETRI_TRANSITIONS=158} [2024-06-03 20:02:26,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-03 20:02:26,814 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 158 transitions, 1843 flow [2024-06-03 20:02:26,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:26,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:26,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:26,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:02:26,815 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:26,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:26,816 INFO L85 PathProgramCache]: Analyzing trace with hash 194945140, now seen corresponding path program 2 times [2024-06-03 20:02:26,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:26,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985704557] [2024-06-03 20:02:26,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:26,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:28,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:28,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985704557] [2024-06-03 20:02:28,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985704557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:28,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:28,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:02:28,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442373510] [2024-06-03 20:02:28,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:28,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:02:28,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:28,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:02:28,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:02:28,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:28,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 158 transitions, 1843 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:28,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:28,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:28,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:29,099 INFO L124 PetriNetUnfolderBase]: 1897/2980 cut-off events. [2024-06-03 20:02:29,099 INFO L125 PetriNetUnfolderBase]: For 52589/52593 co-relation queries the response was YES. [2024-06-03 20:02:29,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18173 conditions, 2980 events. 1897/2980 cut-off events. For 52589/52593 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15516 event pairs, 462 based on Foata normal form. 6/2986 useless extension candidates. Maximal degree in co-relation 18114. Up to 2645 conditions per place. [2024-06-03 20:02:29,120 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 118 selfloop transitions, 64 changer transitions 0/186 dead transitions. [2024-06-03 20:02:29,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 186 transitions, 2309 flow [2024-06-03 20:02:29,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:02:29,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:02:29,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 20:02:29,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 20:02:29,121 INFO L175 Difference]: Start difference. First operand has 125 places, 158 transitions, 1843 flow. Second operand 9 states and 162 transitions. [2024-06-03 20:02:29,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 186 transitions, 2309 flow [2024-06-03 20:02:29,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 186 transitions, 2148 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-03 20:02:29,205 INFO L231 Difference]: Finished difference. Result has 130 places, 158 transitions, 1819 flow [2024-06-03 20:02:29,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1819, PETRI_PLACES=130, PETRI_TRANSITIONS=158} [2024-06-03 20:02:29,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-03 20:02:29,207 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 158 transitions, 1819 flow [2024-06-03 20:02:29,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:29,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:29,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:29,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:02:29,214 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:29,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:29,214 INFO L85 PathProgramCache]: Analyzing trace with hash -220351594, now seen corresponding path program 1 times [2024-06-03 20:02:29,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:29,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709413642] [2024-06-03 20:02:29,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:29,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:30,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:30,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709413642] [2024-06-03 20:02:30,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709413642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:30,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:30,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:02:30,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058166654] [2024-06-03 20:02:30,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:30,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:02:30,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:30,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:02:30,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:02:30,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:30,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 158 transitions, 1819 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:30,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:30,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:30,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:30,626 INFO L124 PetriNetUnfolderBase]: 1915/3003 cut-off events. [2024-06-03 20:02:30,627 INFO L125 PetriNetUnfolderBase]: For 56056/56056 co-relation queries the response was YES. [2024-06-03 20:02:30,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18291 conditions, 3003 events. 1915/3003 cut-off events. For 56056/56056 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15569 event pairs, 494 based on Foata normal form. 2/3005 useless extension candidates. Maximal degree in co-relation 18231. Up to 2872 conditions per place. [2024-06-03 20:02:30,649 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 23 changer transitions 0/186 dead transitions. [2024-06-03 20:02:30,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 186 transitions, 2366 flow [2024-06-03 20:02:30,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:02:30,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:02:30,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 20:02:30,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 20:02:30,651 INFO L175 Difference]: Start difference. First operand has 130 places, 158 transitions, 1819 flow. Second operand 7 states and 126 transitions. [2024-06-03 20:02:30,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 186 transitions, 2366 flow [2024-06-03 20:02:30,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 186 transitions, 2146 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-03 20:02:30,724 INFO L231 Difference]: Finished difference. Result has 129 places, 166 transitions, 1736 flow [2024-06-03 20:02:30,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1736, PETRI_PLACES=129, PETRI_TRANSITIONS=166} [2024-06-03 20:02:30,725 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-03 20:02:30,725 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 166 transitions, 1736 flow [2024-06-03 20:02:30,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:30,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:30,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:30,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:02:30,725 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:30,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:30,726 INFO L85 PathProgramCache]: Analyzing trace with hash -220201864, now seen corresponding path program 2 times [2024-06-03 20:02:30,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:30,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686454685] [2024-06-03 20:02:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:30,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:31,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:31,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686454685] [2024-06-03 20:02:31,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686454685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:31,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:31,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:02:31,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873982774] [2024-06-03 20:02:31,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:31,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:02:31,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:31,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:02:31,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:02:31,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:31,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 166 transitions, 1736 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:31,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:31,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:31,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:32,111 INFO L124 PetriNetUnfolderBase]: 1925/3017 cut-off events. [2024-06-03 20:02:32,112 INFO L125 PetriNetUnfolderBase]: For 59158/59158 co-relation queries the response was YES. [2024-06-03 20:02:32,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18481 conditions, 3017 events. 1925/3017 cut-off events. For 59158/59158 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15655 event pairs, 485 based on Foata normal form. 2/3019 useless extension candidates. Maximal degree in co-relation 18420. Up to 2908 conditions per place. [2024-06-03 20:02:32,135 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 162 selfloop transitions, 19 changer transitions 0/185 dead transitions. [2024-06-03 20:02:32,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 185 transitions, 2181 flow [2024-06-03 20:02:32,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:02:32,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:02:32,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-03 20:02:32,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-03 20:02:32,136 INFO L175 Difference]: Start difference. First operand has 129 places, 166 transitions, 1736 flow. Second operand 7 states and 121 transitions. [2024-06-03 20:02:32,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 185 transitions, 2181 flow [2024-06-03 20:02:32,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 185 transitions, 2135 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-03 20:02:32,231 INFO L231 Difference]: Finished difference. Result has 133 places, 169 transitions, 1769 flow [2024-06-03 20:02:32,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1696, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1769, PETRI_PLACES=133, PETRI_TRANSITIONS=169} [2024-06-03 20:02:32,232 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-03 20:02:32,232 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 169 transitions, 1769 flow [2024-06-03 20:02:32,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:32,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:32,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:32,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:02:32,233 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:32,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:32,233 INFO L85 PathProgramCache]: Analyzing trace with hash 231052735, now seen corresponding path program 1 times [2024-06-03 20:02:32,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:32,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468005503] [2024-06-03 20:02:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:32,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:32,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:32,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468005503] [2024-06-03 20:02:32,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468005503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:32,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:32,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:02:32,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638999588] [2024-06-03 20:02:32,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:32,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:02:32,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:32,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:02:32,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:02:33,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:33,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 169 transitions, 1769 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:33,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:33,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:33,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:33,530 INFO L124 PetriNetUnfolderBase]: 1922/3013 cut-off events. [2024-06-03 20:02:33,530 INFO L125 PetriNetUnfolderBase]: For 63075/63075 co-relation queries the response was YES. [2024-06-03 20:02:33,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18601 conditions, 3013 events. 1922/3013 cut-off events. For 63075/63075 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15696 event pairs, 485 based on Foata normal form. 1/3014 useless extension candidates. Maximal degree in co-relation 18538. Up to 2921 conditions per place. [2024-06-03 20:02:33,555 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 162 selfloop transitions, 16 changer transitions 0/182 dead transitions. [2024-06-03 20:02:33,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 182 transitions, 2189 flow [2024-06-03 20:02:33,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:02:33,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:02:33,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-03 20:02:33,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:02:33,557 INFO L175 Difference]: Start difference. First operand has 133 places, 169 transitions, 1769 flow. Second operand 6 states and 102 transitions. [2024-06-03 20:02:33,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 182 transitions, 2189 flow [2024-06-03 20:02:33,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 182 transitions, 2147 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:02:33,627 INFO L231 Difference]: Finished difference. Result has 134 places, 172 transitions, 1807 flow [2024-06-03 20:02:33,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1727, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1807, PETRI_PLACES=134, PETRI_TRANSITIONS=172} [2024-06-03 20:02:33,628 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-03 20:02:33,628 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 172 transitions, 1807 flow [2024-06-03 20:02:33,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:33,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:33,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:33,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:02:33,629 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:33,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:33,629 INFO L85 PathProgramCache]: Analyzing trace with hash -877180122, now seen corresponding path program 3 times [2024-06-03 20:02:33,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:33,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053522120] [2024-06-03 20:02:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:33,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:34,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:34,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053522120] [2024-06-03 20:02:34,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053522120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:34,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:34,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:02:34,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757377022] [2024-06-03 20:02:34,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:34,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:02:34,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:34,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:02:34,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:02:34,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:34,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 172 transitions, 1807 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:34,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:34,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:34,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:34,981 INFO L124 PetriNetUnfolderBase]: 1916/3005 cut-off events. [2024-06-03 20:02:34,981 INFO L125 PetriNetUnfolderBase]: For 64903/64903 co-relation queries the response was YES. [2024-06-03 20:02:34,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18867 conditions, 3005 events. 1916/3005 cut-off events. For 64903/64903 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15591 event pairs, 484 based on Foata normal form. 2/3007 useless extension candidates. Maximal degree in co-relation 18803. Up to 2911 conditions per place. [2024-06-03 20:02:35,004 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 14 changer transitions 0/185 dead transitions. [2024-06-03 20:02:35,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 185 transitions, 2216 flow [2024-06-03 20:02:35,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:02:35,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:02:35,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-03 20:02:35,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-03 20:02:35,006 INFO L175 Difference]: Start difference. First operand has 134 places, 172 transitions, 1807 flow. Second operand 7 states and 115 transitions. [2024-06-03 20:02:35,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 185 transitions, 2216 flow [2024-06-03 20:02:35,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 185 transitions, 2168 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 20:02:35,125 INFO L231 Difference]: Finished difference. Result has 137 places, 173 transitions, 1804 flow [2024-06-03 20:02:35,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1761, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1804, PETRI_PLACES=137, PETRI_TRANSITIONS=173} [2024-06-03 20:02:35,126 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-03 20:02:35,126 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 173 transitions, 1804 flow [2024-06-03 20:02:35,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:35,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:35,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:35,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:02:35,127 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:35,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:35,127 INFO L85 PathProgramCache]: Analyzing trace with hash -2130847683, now seen corresponding path program 1 times [2024-06-03 20:02:35,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:35,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649065810] [2024-06-03 20:02:35,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:35,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:35,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:35,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:35,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649065810] [2024-06-03 20:02:35,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649065810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:35,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:35,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:02:35,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991820473] [2024-06-03 20:02:35,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:35,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:02:35,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:35,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:02:35,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:02:35,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:35,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 173 transitions, 1804 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:35,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:35,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:35,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:36,436 INFO L124 PetriNetUnfolderBase]: 1990/3120 cut-off events. [2024-06-03 20:02:36,436 INFO L125 PetriNetUnfolderBase]: For 72191/72195 co-relation queries the response was YES. [2024-06-03 20:02:36,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19833 conditions, 3120 events. 1990/3120 cut-off events. For 72191/72195 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16283 event pairs, 464 based on Foata normal form. 8/3128 useless extension candidates. Maximal degree in co-relation 19768. Up to 2890 conditions per place. [2024-06-03 20:02:36,461 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 153 selfloop transitions, 49 changer transitions 0/206 dead transitions. [2024-06-03 20:02:36,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 206 transitions, 2545 flow [2024-06-03 20:02:36,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:02:36,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:02:36,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 20:02:36,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 20:02:36,463 INFO L175 Difference]: Start difference. First operand has 137 places, 173 transitions, 1804 flow. Second operand 7 states and 126 transitions. [2024-06-03 20:02:36,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 206 transitions, 2545 flow [2024-06-03 20:02:36,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 206 transitions, 2513 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:02:36,567 INFO L231 Difference]: Finished difference. Result has 141 places, 187 transitions, 2142 flow [2024-06-03 20:02:36,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2142, PETRI_PLACES=141, PETRI_TRANSITIONS=187} [2024-06-03 20:02:36,568 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-03 20:02:36,568 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 187 transitions, 2142 flow [2024-06-03 20:02:36,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:36,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:36,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:36,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:02:36,568 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:36,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:36,569 INFO L85 PathProgramCache]: Analyzing trace with hash -750755145, now seen corresponding path program 2 times [2024-06-03 20:02:36,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:36,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482691734] [2024-06-03 20:02:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:36,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:37,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:37,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482691734] [2024-06-03 20:02:37,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482691734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:37,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:37,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:02:37,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004655791] [2024-06-03 20:02:37,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:37,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:02:37,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:37,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:02:37,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:02:37,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:37,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 187 transitions, 2142 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:37,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:37,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:37,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:37,947 INFO L124 PetriNetUnfolderBase]: 1978/3104 cut-off events. [2024-06-03 20:02:37,948 INFO L125 PetriNetUnfolderBase]: For 77183/77187 co-relation queries the response was YES. [2024-06-03 20:02:37,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20513 conditions, 3104 events. 1978/3104 cut-off events. For 77183/77187 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16150 event pairs, 462 based on Foata normal form. 8/3112 useless extension candidates. Maximal degree in co-relation 20445. Up to 2968 conditions per place. [2024-06-03 20:02:37,972 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 172 selfloop transitions, 22 changer transitions 0/198 dead transitions. [2024-06-03 20:02:37,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 198 transitions, 2580 flow [2024-06-03 20:02:37,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:02:37,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:02:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-03 20:02:37,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-03 20:02:37,973 INFO L175 Difference]: Start difference. First operand has 141 places, 187 transitions, 2142 flow. Second operand 6 states and 105 transitions. [2024-06-03 20:02:37,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 198 transitions, 2580 flow [2024-06-03 20:02:38,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 2487 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-03 20:02:38,132 INFO L231 Difference]: Finished difference. Result has 144 places, 187 transitions, 2103 flow [2024-06-03 20:02:38,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2103, PETRI_PLACES=144, PETRI_TRANSITIONS=187} [2024-06-03 20:02:38,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-03 20:02:38,133 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 187 transitions, 2103 flow [2024-06-03 20:02:38,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:38,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:38,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:38,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:02:38,133 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:38,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:38,134 INFO L85 PathProgramCache]: Analyzing trace with hash 92175511, now seen corresponding path program 1 times [2024-06-03 20:02:38,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:38,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5650890] [2024-06-03 20:02:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:38,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:39,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:39,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5650890] [2024-06-03 20:02:39,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5650890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:39,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:39,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:02:39,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419580703] [2024-06-03 20:02:39,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:39,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:02:39,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:39,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:02:39,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:02:39,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:39,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 187 transitions, 2103 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:39,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:39,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:39,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:40,342 INFO L124 PetriNetUnfolderBase]: 2162/3412 cut-off events. [2024-06-03 20:02:40,342 INFO L125 PetriNetUnfolderBase]: For 86456/86456 co-relation queries the response was YES. [2024-06-03 20:02:40,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22362 conditions, 3412 events. 2162/3412 cut-off events. For 86456/86456 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18236 event pairs, 469 based on Foata normal form. 12/3423 useless extension candidates. Maximal degree in co-relation 22293. Up to 2402 conditions per place. [2024-06-03 20:02:40,368 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 138 selfloop transitions, 96 changer transitions 0/238 dead transitions. [2024-06-03 20:02:40,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 238 transitions, 3029 flow [2024-06-03 20:02:40,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:02:40,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:02:40,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-03 20:02:40,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-03 20:02:40,370 INFO L175 Difference]: Start difference. First operand has 144 places, 187 transitions, 2103 flow. Second operand 10 states and 188 transitions. [2024-06-03 20:02:40,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 238 transitions, 3029 flow [2024-06-03 20:02:40,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 238 transitions, 2989 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 20:02:40,489 INFO L231 Difference]: Finished difference. Result has 152 places, 195 transitions, 2456 flow [2024-06-03 20:02:40,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2456, PETRI_PLACES=152, PETRI_TRANSITIONS=195} [2024-06-03 20:02:40,490 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-03 20:02:40,490 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 195 transitions, 2456 flow [2024-06-03 20:02:40,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:40,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:40,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:40,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:02:40,491 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:40,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:40,491 INFO L85 PathProgramCache]: Analyzing trace with hash 413278521, now seen corresponding path program 2 times [2024-06-03 20:02:40,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:40,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151014063] [2024-06-03 20:02:40,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:40,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:41,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:41,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151014063] [2024-06-03 20:02:41,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151014063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:41,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:41,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:02:41,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346660086] [2024-06-03 20:02:41,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:41,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:02:41,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:41,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:02:41,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:02:42,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:42,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 195 transitions, 2456 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:42,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:42,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:42,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:43,005 INFO L124 PetriNetUnfolderBase]: 2278/3614 cut-off events. [2024-06-03 20:02:43,006 INFO L125 PetriNetUnfolderBase]: For 102890/102894 co-relation queries the response was YES. [2024-06-03 20:02:43,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24490 conditions, 3614 events. 2278/3614 cut-off events. For 102890/102894 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19906 event pairs, 536 based on Foata normal form. 32/3646 useless extension candidates. Maximal degree in co-relation 24418. Up to 3065 conditions per place. [2024-06-03 20:02:43,033 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 158 selfloop transitions, 73 changer transitions 0/235 dead transitions. [2024-06-03 20:02:43,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 235 transitions, 3177 flow [2024-06-03 20:02:43,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:02:43,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:02:43,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-03 20:02:43,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44146341463414634 [2024-06-03 20:02:43,035 INFO L175 Difference]: Start difference. First operand has 152 places, 195 transitions, 2456 flow. Second operand 10 states and 181 transitions. [2024-06-03 20:02:43,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 235 transitions, 3177 flow [2024-06-03 20:02:43,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 235 transitions, 3101 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-03 20:02:43,180 INFO L231 Difference]: Finished difference. Result has 159 places, 198 transitions, 2631 flow [2024-06-03 20:02:43,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2631, PETRI_PLACES=159, PETRI_TRANSITIONS=198} [2024-06-03 20:02:43,181 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-03 20:02:43,181 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 198 transitions, 2631 flow [2024-06-03 20:02:43,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:43,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:43,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:43,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:02:43,182 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:43,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:43,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1748333079, now seen corresponding path program 3 times [2024-06-03 20:02:43,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:43,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960663696] [2024-06-03 20:02:43,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:43,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:45,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:45,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960663696] [2024-06-03 20:02:45,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960663696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:45,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:45,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:02:45,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205168164] [2024-06-03 20:02:45,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:45,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:02:45,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:45,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:02:45,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:02:45,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:45,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 198 transitions, 2631 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:45,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:45,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:45,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:46,512 INFO L124 PetriNetUnfolderBase]: 2308/3668 cut-off events. [2024-06-03 20:02:46,513 INFO L125 PetriNetUnfolderBase]: For 104269/104273 co-relation queries the response was YES. [2024-06-03 20:02:46,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24671 conditions, 3668 events. 2308/3668 cut-off events. For 104269/104273 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 20274 event pairs, 540 based on Foata normal form. 32/3700 useless extension candidates. Maximal degree in co-relation 24597. Up to 3119 conditions per place. [2024-06-03 20:02:46,544 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 160 selfloop transitions, 73 changer transitions 0/237 dead transitions. [2024-06-03 20:02:46,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 237 transitions, 3325 flow [2024-06-03 20:02:46,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:02:46,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:02:46,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-03 20:02:46,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44146341463414634 [2024-06-03 20:02:46,546 INFO L175 Difference]: Start difference. First operand has 159 places, 198 transitions, 2631 flow. Second operand 10 states and 181 transitions. [2024-06-03 20:02:46,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 237 transitions, 3325 flow [2024-06-03 20:02:46,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 237 transitions, 3142 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-03 20:02:46,754 INFO L231 Difference]: Finished difference. Result has 161 places, 200 transitions, 2666 flow [2024-06-03 20:02:46,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2448, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2666, PETRI_PLACES=161, PETRI_TRANSITIONS=200} [2024-06-03 20:02:46,755 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-03 20:02:46,755 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 200 transitions, 2666 flow [2024-06-03 20:02:46,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:46,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:46,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:46,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:02:46,756 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:46,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1759845547, now seen corresponding path program 1 times [2024-06-03 20:02:46,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:46,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901939387] [2024-06-03 20:02:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:46,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:47,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:47,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901939387] [2024-06-03 20:02:47,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901939387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:47,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:47,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:02:47,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577402412] [2024-06-03 20:02:47,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:47,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:02:47,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:47,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:02:47,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:02:47,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:47,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 200 transitions, 2666 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:47,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:47,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:47,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:48,312 INFO L124 PetriNetUnfolderBase]: 2352/3736 cut-off events. [2024-06-03 20:02:48,312 INFO L125 PetriNetUnfolderBase]: For 102521/102521 co-relation queries the response was YES. [2024-06-03 20:02:48,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24920 conditions, 3736 events. 2352/3736 cut-off events. For 102521/102521 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20730 event pairs, 551 based on Foata normal form. 12/3747 useless extension candidates. Maximal degree in co-relation 24845. Up to 3527 conditions per place. [2024-06-03 20:02:48,346 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 191 selfloop transitions, 23 changer transitions 0/218 dead transitions. [2024-06-03 20:02:48,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 218 transitions, 3222 flow [2024-06-03 20:02:48,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:02:48,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:02:48,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-03 20:02:48,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-03 20:02:48,348 INFO L175 Difference]: Start difference. First operand has 161 places, 200 transitions, 2666 flow. Second operand 6 states and 110 transitions. [2024-06-03 20:02:48,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 218 transitions, 3222 flow [2024-06-03 20:02:48,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 218 transitions, 3057 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-03 20:02:48,537 INFO L231 Difference]: Finished difference. Result has 159 places, 201 transitions, 2569 flow [2024-06-03 20:02:48,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2501, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2569, PETRI_PLACES=159, PETRI_TRANSITIONS=201} [2024-06-03 20:02:48,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-03 20:02:48,538 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 201 transitions, 2569 flow [2024-06-03 20:02:48,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:48,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:48,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:48,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:02:48,538 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:48,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:48,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2051968179, now seen corresponding path program 3 times [2024-06-03 20:02:48,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:48,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087544493] [2024-06-03 20:02:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:48,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:49,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:49,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087544493] [2024-06-03 20:02:49,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087544493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:49,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:49,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:02:49,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85221088] [2024-06-03 20:02:49,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:49,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:02:49,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:49,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:02:49,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:02:49,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:49,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 201 transitions, 2569 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:49,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:49,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:49,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:49,947 INFO L124 PetriNetUnfolderBase]: 2372/3764 cut-off events. [2024-06-03 20:02:49,947 INFO L125 PetriNetUnfolderBase]: For 101494/101498 co-relation queries the response was YES. [2024-06-03 20:02:49,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24977 conditions, 3764 events. 2372/3764 cut-off events. For 101494/101498 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20901 event pairs, 554 based on Foata normal form. 8/3772 useless extension candidates. Maximal degree in co-relation 24901. Up to 3570 conditions per place. [2024-06-03 20:02:49,983 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 180 selfloop transitions, 39 changer transitions 0/223 dead transitions. [2024-06-03 20:02:49,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 223 transitions, 3147 flow [2024-06-03 20:02:49,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:02:49,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:02:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-03 20:02:49,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-03 20:02:49,985 INFO L175 Difference]: Start difference. First operand has 159 places, 201 transitions, 2569 flow. Second operand 7 states and 125 transitions. [2024-06-03 20:02:49,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 223 transitions, 3147 flow [2024-06-03 20:02:50,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 223 transitions, 3105 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-03 20:02:50,204 INFO L231 Difference]: Finished difference. Result has 162 places, 204 transitions, 2674 flow [2024-06-03 20:02:50,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2527, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2674, PETRI_PLACES=162, PETRI_TRANSITIONS=204} [2024-06-03 20:02:50,205 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-03 20:02:50,205 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 204 transitions, 2674 flow [2024-06-03 20:02:50,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:50,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:50,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:50,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:02:50,206 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:50,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:50,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2064348339, now seen corresponding path program 4 times [2024-06-03 20:02:50,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:50,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022630579] [2024-06-03 20:02:50,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:50,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:50,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:50,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022630579] [2024-06-03 20:02:50,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022630579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:50,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:50,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:02:50,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067913044] [2024-06-03 20:02:50,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:50,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:02:50,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:50,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:02:50,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:02:50,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:50,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 204 transitions, 2674 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:50,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:50,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:50,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:51,709 INFO L124 PetriNetUnfolderBase]: 2416/3835 cut-off events. [2024-06-03 20:02:51,710 INFO L125 PetriNetUnfolderBase]: For 110250/110254 co-relation queries the response was YES. [2024-06-03 20:02:51,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26088 conditions, 3835 events. 2416/3835 cut-off events. For 110250/110254 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21411 event pairs, 559 based on Foata normal form. 8/3843 useless extension candidates. Maximal degree in co-relation 26011. Up to 3526 conditions per place. [2024-06-03 20:02:51,829 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 169 selfloop transitions, 60 changer transitions 0/233 dead transitions. [2024-06-03 20:02:51,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 233 transitions, 3460 flow [2024-06-03 20:02:51,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:02:51,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:02:51,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-03 20:02:51,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-03 20:02:51,831 INFO L175 Difference]: Start difference. First operand has 162 places, 204 transitions, 2674 flow. Second operand 7 states and 128 transitions. [2024-06-03 20:02:51,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 233 transitions, 3460 flow [2024-06-03 20:02:52,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 233 transitions, 3285 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-03 20:02:52,196 INFO L231 Difference]: Finished difference. Result has 165 places, 213 transitions, 2801 flow [2024-06-03 20:02:52,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2499, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2801, PETRI_PLACES=165, PETRI_TRANSITIONS=213} [2024-06-03 20:02:52,197 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-03 20:02:52,197 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 213 transitions, 2801 flow [2024-06-03 20:02:52,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:52,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:52,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:52,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:02:52,198 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:52,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:52,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1433257787, now seen corresponding path program 5 times [2024-06-03 20:02:52,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:52,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698827045] [2024-06-03 20:02:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:52,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:52,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:52,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698827045] [2024-06-03 20:02:52,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698827045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:52,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:52,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:02:52,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498619124] [2024-06-03 20:02:52,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:52,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:02:52,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:52,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:02:52,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:02:52,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:52,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 213 transitions, 2801 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:52,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:52,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:52,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:53,541 INFO L124 PetriNetUnfolderBase]: 2436/3867 cut-off events. [2024-06-03 20:02:53,541 INFO L125 PetriNetUnfolderBase]: For 118283/118287 co-relation queries the response was YES. [2024-06-03 20:02:53,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26918 conditions, 3867 events. 2436/3867 cut-off events. For 118283/118287 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21597 event pairs, 568 based on Foata normal form. 8/3875 useless extension candidates. Maximal degree in co-relation 26840. Up to 3722 conditions per place. [2024-06-03 20:02:53,571 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 202 selfloop transitions, 22 changer transitions 0/228 dead transitions. [2024-06-03 20:02:53,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 228 transitions, 3373 flow [2024-06-03 20:02:53,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:02:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:02:53,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-03 20:02:53,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-03 20:02:53,578 INFO L175 Difference]: Start difference. First operand has 165 places, 213 transitions, 2801 flow. Second operand 7 states and 117 transitions. [2024-06-03 20:02:53,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 228 transitions, 3373 flow [2024-06-03 20:02:53,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 228 transitions, 3274 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-03 20:02:53,783 INFO L231 Difference]: Finished difference. Result has 169 places, 216 transitions, 2826 flow [2024-06-03 20:02:53,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2704, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2826, PETRI_PLACES=169, PETRI_TRANSITIONS=216} [2024-06-03 20:02:53,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-03 20:02:53,783 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 216 transitions, 2826 flow [2024-06-03 20:02:53,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:53,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:53,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:53,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:02:53,784 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:53,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:53,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1422786699, now seen corresponding path program 6 times [2024-06-03 20:02:53,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:53,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10315243] [2024-06-03 20:02:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:53,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:54,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:54,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10315243] [2024-06-03 20:02:54,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10315243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:54,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:54,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:02:54,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947835131] [2024-06-03 20:02:54,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:54,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:02:54,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:54,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:02:54,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:02:54,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:54,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 216 transitions, 2826 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:54,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:54,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:54,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:55,089 INFO L124 PetriNetUnfolderBase]: 2424/3849 cut-off events. [2024-06-03 20:02:55,090 INFO L125 PetriNetUnfolderBase]: For 113187/113191 co-relation queries the response was YES. [2024-06-03 20:02:55,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26271 conditions, 3849 events. 2424/3849 cut-off events. For 113187/113191 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 21548 event pairs, 552 based on Foata normal form. 8/3857 useless extension candidates. Maximal degree in co-relation 26191. Up to 3670 conditions per place. [2024-06-03 20:02:55,127 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 30 changer transitions 0/230 dead transitions. [2024-06-03 20:02:55,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 230 transitions, 3360 flow [2024-06-03 20:02:55,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:02:55,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:02:55,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 20:02:55,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-03 20:02:55,129 INFO L175 Difference]: Start difference. First operand has 169 places, 216 transitions, 2826 flow. Second operand 7 states and 120 transitions. [2024-06-03 20:02:55,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 230 transitions, 3360 flow [2024-06-03 20:02:55,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 230 transitions, 3222 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-03 20:02:55,378 INFO L231 Difference]: Finished difference. Result has 171 places, 216 transitions, 2754 flow [2024-06-03 20:02:55,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2688, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2754, PETRI_PLACES=171, PETRI_TRANSITIONS=216} [2024-06-03 20:02:55,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-03 20:02:55,380 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 216 transitions, 2754 flow [2024-06-03 20:02:55,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:55,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:55,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:55,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:02:55,381 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:55,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:55,381 INFO L85 PathProgramCache]: Analyzing trace with hash 905941349, now seen corresponding path program 2 times [2024-06-03 20:02:55,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:55,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897886019] [2024-06-03 20:02:55,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:55,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:56,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:56,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897886019] [2024-06-03 20:02:56,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897886019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:56,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:56,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:02:56,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252427290] [2024-06-03 20:02:56,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:56,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:02:56,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:56,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:02:56,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:02:56,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:56,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 216 transitions, 2754 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:56,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:56,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:56,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:56,950 INFO L124 PetriNetUnfolderBase]: 2468/3919 cut-off events. [2024-06-03 20:02:56,950 INFO L125 PetriNetUnfolderBase]: For 121856/121856 co-relation queries the response was YES. [2024-06-03 20:02:56,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26655 conditions, 3919 events. 2468/3919 cut-off events. For 121856/121856 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 22012 event pairs, 573 based on Foata normal form. 12/3930 useless extension candidates. Maximal degree in co-relation 26575. Up to 3686 conditions per place. [2024-06-03 20:02:56,983 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 208 selfloop transitions, 25 changer transitions 0/237 dead transitions. [2024-06-03 20:02:56,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 237 transitions, 3390 flow [2024-06-03 20:02:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:02:56,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:02:56,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 20:02:56,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-03 20:02:56,986 INFO L175 Difference]: Start difference. First operand has 171 places, 216 transitions, 2754 flow. Second operand 7 states and 124 transitions. [2024-06-03 20:02:56,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 237 transitions, 3390 flow [2024-06-03 20:02:57,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 237 transitions, 3234 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-03 20:02:57,188 INFO L231 Difference]: Finished difference. Result has 171 places, 217 transitions, 2669 flow [2024-06-03 20:02:57,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2598, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2669, PETRI_PLACES=171, PETRI_TRANSITIONS=217} [2024-06-03 20:02:57,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-03 20:02:57,189 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 217 transitions, 2669 flow [2024-06-03 20:02:57,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:57,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:57,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:57,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:02:57,190 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:57,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:57,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1428074121, now seen corresponding path program 3 times [2024-06-03 20:02:57,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:57,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855539976] [2024-06-03 20:02:57,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:57,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:57,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:57,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855539976] [2024-06-03 20:02:57,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855539976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:57,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:57,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:02:57,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904553357] [2024-06-03 20:02:57,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:57,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:02:57,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:57,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:02:57,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:02:57,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:57,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 217 transitions, 2669 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:57,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:57,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:57,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:02:58,714 INFO L124 PetriNetUnfolderBase]: 2470/3925 cut-off events. [2024-06-03 20:02:58,715 INFO L125 PetriNetUnfolderBase]: For 121147/121147 co-relation queries the response was YES. [2024-06-03 20:02:58,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26474 conditions, 3925 events. 2470/3925 cut-off events. For 121147/121147 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22006 event pairs, 563 based on Foata normal form. 8/3932 useless extension candidates. Maximal degree in co-relation 26394. Up to 3602 conditions per place. [2024-06-03 20:02:58,745 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 209 selfloop transitions, 27 changer transitions 0/240 dead transitions. [2024-06-03 20:02:58,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 240 transitions, 3337 flow [2024-06-03 20:02:58,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:02:58,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:02:58,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-03 20:02:58,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-03 20:02:58,746 INFO L175 Difference]: Start difference. First operand has 171 places, 217 transitions, 2669 flow. Second operand 7 states and 125 transitions. [2024-06-03 20:02:58,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 240 transitions, 3337 flow [2024-06-03 20:02:58,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 240 transitions, 3284 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:02:58,984 INFO L231 Difference]: Finished difference. Result has 173 places, 218 transitions, 2692 flow [2024-06-03 20:02:58,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2616, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2692, PETRI_PLACES=173, PETRI_TRANSITIONS=218} [2024-06-03 20:02:58,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-03 20:02:58,985 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 218 transitions, 2692 flow [2024-06-03 20:02:58,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:02:58,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:02:58,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:02:58,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:02:58,986 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:02:58,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:02:58,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1650857543, now seen corresponding path program 1 times [2024-06-03 20:02:58,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:02:58,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790182174] [2024-06-03 20:02:58,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:02:58,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:02:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:02:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:02:59,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:02:59,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790182174] [2024-06-03 20:02:59,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790182174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:02:59,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:02:59,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:02:59,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602240754] [2024-06-03 20:02:59,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:02:59,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:02:59,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:02:59,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:02:59,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:02:59,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:02:59,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 218 transitions, 2692 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:02:59,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:02:59,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:02:59,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:00,792 INFO L124 PetriNetUnfolderBase]: 2530/4013 cut-off events. [2024-06-03 20:03:00,792 INFO L125 PetriNetUnfolderBase]: For 130806/130810 co-relation queries the response was YES. [2024-06-03 20:03:00,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27221 conditions, 4013 events. 2530/4013 cut-off events. For 130806/130810 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22609 event pairs, 582 based on Foata normal form. 16/4029 useless extension candidates. Maximal degree in co-relation 27140. Up to 3604 conditions per place. [2024-06-03 20:03:00,825 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 183 selfloop transitions, 59 changer transitions 0/246 dead transitions. [2024-06-03 20:03:00,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 246 transitions, 3358 flow [2024-06-03 20:03:00,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:03:00,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:03:00,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 20:03:00,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-03 20:03:00,827 INFO L175 Difference]: Start difference. First operand has 173 places, 218 transitions, 2692 flow. Second operand 8 states and 147 transitions. [2024-06-03 20:03:00,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 246 transitions, 3358 flow [2024-06-03 20:03:01,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 246 transitions, 3298 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:03:01,040 INFO L231 Difference]: Finished difference. Result has 176 places, 223 transitions, 2854 flow [2024-06-03 20:03:01,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2632, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2854, PETRI_PLACES=176, PETRI_TRANSITIONS=223} [2024-06-03 20:03:01,041 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-03 20:03:01,041 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 223 transitions, 2854 flow [2024-06-03 20:03:01,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:01,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:01,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:01,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:03:01,042 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:01,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:01,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1759036421, now seen corresponding path program 2 times [2024-06-03 20:03:01,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:01,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673996488] [2024-06-03 20:03:01,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:01,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:01,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:01,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673996488] [2024-06-03 20:03:01,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673996488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:01,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:01,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:01,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154194276] [2024-06-03 20:03:01,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:01,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:01,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:01,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:01,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:01,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:01,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 223 transitions, 2854 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:01,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:01,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:01,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:02,706 INFO L124 PetriNetUnfolderBase]: 2566/4061 cut-off events. [2024-06-03 20:03:02,706 INFO L125 PetriNetUnfolderBase]: For 134914/134914 co-relation queries the response was YES. [2024-06-03 20:03:02,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28514 conditions, 4061 events. 2566/4061 cut-off events. For 134914/134914 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22816 event pairs, 589 based on Foata normal form. 4/4065 useless extension candidates. Maximal degree in co-relation 28432. Up to 3826 conditions per place. [2024-06-03 20:03:02,746 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 220 selfloop transitions, 36 changer transitions 0/260 dead transitions. [2024-06-03 20:03:02,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 260 transitions, 3745 flow [2024-06-03 20:03:02,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:03:02,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:03:02,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 20:03:02,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-03 20:03:02,747 INFO L175 Difference]: Start difference. First operand has 176 places, 223 transitions, 2854 flow. Second operand 8 states and 145 transitions. [2024-06-03 20:03:02,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 260 transitions, 3745 flow [2024-06-03 20:03:03,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 260 transitions, 3545 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-03 20:03:03,051 INFO L231 Difference]: Finished difference. Result has 180 places, 234 transitions, 2941 flow [2024-06-03 20:03:03,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2682, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2941, PETRI_PLACES=180, PETRI_TRANSITIONS=234} [2024-06-03 20:03:03,051 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-03 20:03:03,052 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 234 transitions, 2941 flow [2024-06-03 20:03:03,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:03,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:03,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:03,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:03:03,052 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:03,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:03,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2064356275, now seen corresponding path program 3 times [2024-06-03 20:03:03,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:03,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161927571] [2024-06-03 20:03:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:03,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:03,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:03,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161927571] [2024-06-03 20:03:03,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161927571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:03,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:03,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:03,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095002234] [2024-06-03 20:03:03,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:03,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:03,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:03,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:03,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:04,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:04,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 234 transitions, 2941 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:04,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:04,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:04,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:04,740 INFO L124 PetriNetUnfolderBase]: 2586/4089 cut-off events. [2024-06-03 20:03:04,740 INFO L125 PetriNetUnfolderBase]: For 141531/141531 co-relation queries the response was YES. [2024-06-03 20:03:04,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28945 conditions, 4089 events. 2586/4089 cut-off events. For 141531/141531 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 22970 event pairs, 593 based on Foata normal form. 4/4093 useless extension candidates. Maximal degree in co-relation 28860. Up to 3939 conditions per place. [2024-06-03 20:03:04,840 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 230 selfloop transitions, 22 changer transitions 0/256 dead transitions. [2024-06-03 20:03:04,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 256 transitions, 3584 flow [2024-06-03 20:03:04,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:03:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:03:04,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 20:03:04,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:03:04,842 INFO L175 Difference]: Start difference. First operand has 180 places, 234 transitions, 2941 flow. Second operand 8 states and 136 transitions. [2024-06-03 20:03:04,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 256 transitions, 3584 flow [2024-06-03 20:03:05,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 256 transitions, 3512 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-03 20:03:05,155 INFO L231 Difference]: Finished difference. Result has 185 places, 237 transitions, 2978 flow [2024-06-03 20:03:05,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2978, PETRI_PLACES=185, PETRI_TRANSITIONS=237} [2024-06-03 20:03:05,155 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-03 20:03:05,156 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 237 transitions, 2978 flow [2024-06-03 20:03:05,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:05,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:05,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:05,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:03:05,156 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:05,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:05,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2064363219, now seen corresponding path program 1 times [2024-06-03 20:03:05,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:05,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771403530] [2024-06-03 20:03:05,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:05,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:06,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:06,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771403530] [2024-06-03 20:03:06,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771403530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:06,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:06,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:06,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513876744] [2024-06-03 20:03:06,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:06,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:06,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:06,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:06,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:06,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:06,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 237 transitions, 2978 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:06,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:06,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:06,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:06,937 INFO L124 PetriNetUnfolderBase]: 2594/4101 cut-off events. [2024-06-03 20:03:06,937 INFO L125 PetriNetUnfolderBase]: For 144987/144987 co-relation queries the response was YES. [2024-06-03 20:03:06,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29103 conditions, 4101 events. 2594/4101 cut-off events. For 144987/144987 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 23060 event pairs, 593 based on Foata normal form. 2/4103 useless extension candidates. Maximal degree in co-relation 29016. Up to 3969 conditions per place. [2024-06-03 20:03:06,976 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 233 selfloop transitions, 18 changer transitions 0/255 dead transitions. [2024-06-03 20:03:06,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 255 transitions, 3574 flow [2024-06-03 20:03:06,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:03:06,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:03:06,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 20:03:06,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-03 20:03:06,978 INFO L175 Difference]: Start difference. First operand has 185 places, 237 transitions, 2978 flow. Second operand 7 states and 120 transitions. [2024-06-03 20:03:06,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 255 transitions, 3574 flow [2024-06-03 20:03:07,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 255 transitions, 3504 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 20:03:07,319 INFO L231 Difference]: Finished difference. Result has 186 places, 239 transitions, 2987 flow [2024-06-03 20:03:07,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2908, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2987, PETRI_PLACES=186, PETRI_TRANSITIONS=239} [2024-06-03 20:03:07,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-03 20:03:07,319 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 239 transitions, 2987 flow [2024-06-03 20:03:07,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:07,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:07,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:07,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:03:07,320 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:07,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:07,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1419254777, now seen corresponding path program 2 times [2024-06-03 20:03:07,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:07,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350785072] [2024-06-03 20:03:07,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:07,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:08,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:08,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350785072] [2024-06-03 20:03:08,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350785072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:08,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:08,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:08,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008624502] [2024-06-03 20:03:08,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:08,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:08,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:08,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:08,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:08,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:08,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 239 transitions, 2987 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:08,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:08,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:08,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:08,833 INFO L124 PetriNetUnfolderBase]: 2602/4113 cut-off events. [2024-06-03 20:03:08,834 INFO L125 PetriNetUnfolderBase]: For 150861/150861 co-relation queries the response was YES. [2024-06-03 20:03:08,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29364 conditions, 4113 events. 2602/4113 cut-off events. For 150861/150861 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 23158 event pairs, 612 based on Foata normal form. 2/4115 useless extension candidates. Maximal degree in co-relation 29276. Up to 3988 conditions per place. [2024-06-03 20:03:08,876 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 231 selfloop transitions, 18 changer transitions 0/253 dead transitions. [2024-06-03 20:03:08,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 253 transitions, 3563 flow [2024-06-03 20:03:08,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:03:08,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:03:08,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-03 20:03:08,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-03 20:03:08,878 INFO L175 Difference]: Start difference. First operand has 186 places, 239 transitions, 2987 flow. Second operand 7 states and 115 transitions. [2024-06-03 20:03:08,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 253 transitions, 3563 flow [2024-06-03 20:03:09,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 253 transitions, 3500 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 20:03:09,230 INFO L231 Difference]: Finished difference. Result has 188 places, 241 transitions, 3008 flow [2024-06-03 20:03:09,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2924, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3008, PETRI_PLACES=188, PETRI_TRANSITIONS=241} [2024-06-03 20:03:09,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-03 20:03:09,231 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 241 transitions, 3008 flow [2024-06-03 20:03:09,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:09,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:09,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:09,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:03:09,232 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:09,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:09,232 INFO L85 PathProgramCache]: Analyzing trace with hash -419999901, now seen corresponding path program 4 times [2024-06-03 20:03:09,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:09,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883858270] [2024-06-03 20:03:09,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:09,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:10,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:10,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883858270] [2024-06-03 20:03:10,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883858270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:10,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:10,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:10,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107899515] [2024-06-03 20:03:10,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:10,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:10,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:10,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:10,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:10,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:10,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 241 transitions, 3008 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:10,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:10,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:10,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:10,895 INFO L124 PetriNetUnfolderBase]: 2590/4097 cut-off events. [2024-06-03 20:03:10,895 INFO L125 PetriNetUnfolderBase]: For 154996/154996 co-relation queries the response was YES. [2024-06-03 20:03:10,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29275 conditions, 4097 events. 2590/4097 cut-off events. For 154996/154996 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 23046 event pairs, 604 based on Foata normal form. 4/4101 useless extension candidates. Maximal degree in co-relation 29186. Up to 3962 conditions per place. [2024-06-03 20:03:10,945 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 236 selfloop transitions, 17 changer transitions 0/257 dead transitions. [2024-06-03 20:03:10,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 257 transitions, 3595 flow [2024-06-03 20:03:10,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:03:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:03:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-03 20:03:10,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-03 20:03:10,946 INFO L175 Difference]: Start difference. First operand has 188 places, 241 transitions, 3008 flow. Second operand 8 states and 130 transitions. [2024-06-03 20:03:10,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 257 transitions, 3595 flow [2024-06-03 20:03:11,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 257 transitions, 3503 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-03 20:03:11,305 INFO L231 Difference]: Finished difference. Result has 191 places, 242 transitions, 2973 flow [2024-06-03 20:03:11,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2922, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2973, PETRI_PLACES=191, PETRI_TRANSITIONS=242} [2024-06-03 20:03:11,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-03 20:03:11,306 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 242 transitions, 2973 flow [2024-06-03 20:03:11,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:11,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:11,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:11,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:03:11,323 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:11,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:11,324 INFO L85 PathProgramCache]: Analyzing trace with hash -411422077, now seen corresponding path program 3 times [2024-06-03 20:03:11,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:11,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288451783] [2024-06-03 20:03:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:11,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:12,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:12,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288451783] [2024-06-03 20:03:12,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288451783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:12,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:12,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:12,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25651915] [2024-06-03 20:03:12,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:12,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:12,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:12,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:12,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:12,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:12,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 242 transitions, 2973 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:12,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:12,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:12,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:12,997 INFO L124 PetriNetUnfolderBase]: 2585/4090 cut-off events. [2024-06-03 20:03:12,997 INFO L125 PetriNetUnfolderBase]: For 156216/156216 co-relation queries the response was YES. [2024-06-03 20:03:13,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29152 conditions, 4090 events. 2585/4090 cut-off events. For 156216/156216 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22944 event pairs, 601 based on Foata normal form. 2/4092 useless extension candidates. Maximal degree in co-relation 29062. Up to 3968 conditions per place. [2024-06-03 20:03:13,039 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 238 selfloop transitions, 14 changer transitions 0/256 dead transitions. [2024-06-03 20:03:13,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 256 transitions, 3553 flow [2024-06-03 20:03:13,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:03:13,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:03:13,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-03 20:03:13,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-03 20:03:13,041 INFO L175 Difference]: Start difference. First operand has 191 places, 242 transitions, 2973 flow. Second operand 7 states and 114 transitions. [2024-06-03 20:03:13,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 256 transitions, 3553 flow [2024-06-03 20:03:13,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 256 transitions, 3507 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 20:03:13,321 INFO L231 Difference]: Finished difference. Result has 192 places, 244 transitions, 3006 flow [2024-06-03 20:03:13,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2927, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3006, PETRI_PLACES=192, PETRI_TRANSITIONS=244} [2024-06-03 20:03:13,322 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-03 20:03:13,322 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 244 transitions, 3006 flow [2024-06-03 20:03:13,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:13,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:13,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:13,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:03:13,322 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:13,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:13,323 INFO L85 PathProgramCache]: Analyzing trace with hash -411718995, now seen corresponding path program 1 times [2024-06-03 20:03:13,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:13,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374364604] [2024-06-03 20:03:13,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:13,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:14,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:14,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374364604] [2024-06-03 20:03:14,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374364604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:14,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:14,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:14,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416074022] [2024-06-03 20:03:14,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:14,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:14,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:14,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:14,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:14,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:14,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 244 transitions, 3006 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:14,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:14,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:14,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:15,252 INFO L124 PetriNetUnfolderBase]: 2582/4086 cut-off events. [2024-06-03 20:03:15,252 INFO L125 PetriNetUnfolderBase]: For 160433/160433 co-relation queries the response was YES. [2024-06-03 20:03:15,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29267 conditions, 4086 events. 2582/4086 cut-off events. For 160433/160433 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22953 event pairs, 604 based on Foata normal form. 1/4087 useless extension candidates. Maximal degree in co-relation 29176. Up to 3958 conditions per place. [2024-06-03 20:03:15,296 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 233 selfloop transitions, 22 changer transitions 0/259 dead transitions. [2024-06-03 20:03:15,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 259 transitions, 3610 flow [2024-06-03 20:03:15,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:03:15,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:03:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-03 20:03:15,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-03 20:03:15,297 INFO L175 Difference]: Start difference. First operand has 192 places, 244 transitions, 3006 flow. Second operand 7 states and 116 transitions. [2024-06-03 20:03:15,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 259 transitions, 3610 flow [2024-06-03 20:03:15,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 259 transitions, 3547 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 20:03:15,687 INFO L231 Difference]: Finished difference. Result has 194 places, 247 transitions, 3051 flow [2024-06-03 20:03:15,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2943, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3051, PETRI_PLACES=194, PETRI_TRANSITIONS=247} [2024-06-03 20:03:15,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-03 20:03:15,688 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 247 transitions, 3051 flow [2024-06-03 20:03:15,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:15,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:15,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:15,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:03:15,689 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:15,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:15,689 INFO L85 PathProgramCache]: Analyzing trace with hash -87763493, now seen corresponding path program 1 times [2024-06-03 20:03:15,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:15,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90643392] [2024-06-03 20:03:15,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:15,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:16,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:16,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90643392] [2024-06-03 20:03:16,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90643392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:16,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:16,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:16,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373215584] [2024-06-03 20:03:16,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:16,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:16,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:16,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:16,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:16,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:16,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 247 transitions, 3051 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:16,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:16,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:16,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:17,415 INFO L124 PetriNetUnfolderBase]: 2564/4060 cut-off events. [2024-06-03 20:03:17,415 INFO L125 PetriNetUnfolderBase]: For 164331/164331 co-relation queries the response was YES. [2024-06-03 20:03:17,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29093 conditions, 4060 events. 2564/4060 cut-off events. For 164331/164331 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 22715 event pairs, 461 based on Foata normal form. 8/4067 useless extension candidates. Maximal degree in co-relation 29001. Up to 3773 conditions per place. [2024-06-03 20:03:17,451 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 242 selfloop transitions, 26 changer transitions 0/272 dead transitions. [2024-06-03 20:03:17,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 272 transitions, 3775 flow [2024-06-03 20:03:17,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:03:17,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:03:17,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 20:03:17,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-03 20:03:17,452 INFO L175 Difference]: Start difference. First operand has 194 places, 247 transitions, 3051 flow. Second operand 7 states and 129 transitions. [2024-06-03 20:03:17,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 272 transitions, 3775 flow [2024-06-03 20:03:17,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 272 transitions, 3707 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 20:03:17,865 INFO L231 Difference]: Finished difference. Result has 196 places, 247 transitions, 3039 flow [2024-06-03 20:03:17,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3039, PETRI_PLACES=196, PETRI_TRANSITIONS=247} [2024-06-03 20:03:17,866 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-03 20:03:17,866 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 247 transitions, 3039 flow [2024-06-03 20:03:17,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:17,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:17,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:17,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:03:17,867 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:17,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:17,867 INFO L85 PathProgramCache]: Analyzing trace with hash -228418241, now seen corresponding path program 1 times [2024-06-03 20:03:17,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:17,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769470285] [2024-06-03 20:03:17,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:17,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:18,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:18,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769470285] [2024-06-03 20:03:18,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769470285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:18,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:18,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:18,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259390400] [2024-06-03 20:03:18,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:18,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:18,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:18,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:18,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:18,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:18,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 247 transitions, 3039 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:18,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:18,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:18,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:19,732 INFO L124 PetriNetUnfolderBase]: 2598/4110 cut-off events. [2024-06-03 20:03:19,733 INFO L125 PetriNetUnfolderBase]: For 169087/169087 co-relation queries the response was YES. [2024-06-03 20:03:19,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29911 conditions, 4110 events. 2598/4110 cut-off events. For 169087/169087 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 23116 event pairs, 556 based on Foata normal form. 2/4111 useless extension candidates. Maximal degree in co-relation 29818. Up to 3850 conditions per place. [2024-06-03 20:03:19,767 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 220 selfloop transitions, 55 changer transitions 0/279 dead transitions. [2024-06-03 20:03:19,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 279 transitions, 4013 flow [2024-06-03 20:03:19,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:03:19,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:03:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 20:03:19,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-03 20:03:19,769 INFO L175 Difference]: Start difference. First operand has 196 places, 247 transitions, 3039 flow. Second operand 7 states and 129 transitions. [2024-06-03 20:03:19,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 279 transitions, 4013 flow [2024-06-03 20:03:20,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 279 transitions, 3951 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 20:03:20,147 INFO L231 Difference]: Finished difference. Result has 199 places, 260 transitions, 3393 flow [2024-06-03 20:03:20,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2977, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3393, PETRI_PLACES=199, PETRI_TRANSITIONS=260} [2024-06-03 20:03:20,147 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-03 20:03:20,148 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 260 transitions, 3393 flow [2024-06-03 20:03:20,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:20,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:20,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:20,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:03:20,148 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:20,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:20,149 INFO L85 PathProgramCache]: Analyzing trace with hash -221752001, now seen corresponding path program 2 times [2024-06-03 20:03:20,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:20,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080459044] [2024-06-03 20:03:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:20,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:20,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:20,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:20,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080459044] [2024-06-03 20:03:20,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080459044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:20,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:20,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:20,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581677362] [2024-06-03 20:03:20,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:20,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:20,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:20,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:20,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:20,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:20,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 260 transitions, 3393 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:20,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:20,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:20,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:21,715 INFO L124 PetriNetUnfolderBase]: 2594/4104 cut-off events. [2024-06-03 20:03:21,716 INFO L125 PetriNetUnfolderBase]: For 177539/177539 co-relation queries the response was YES. [2024-06-03 20:03:21,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30467 conditions, 4104 events. 2594/4104 cut-off events. For 177539/177539 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 23057 event pairs, 580 based on Foata normal form. 4/4107 useless extension candidates. Maximal degree in co-relation 30372. Up to 3898 conditions per place. [2024-06-03 20:03:21,759 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 234 selfloop transitions, 37 changer transitions 0/275 dead transitions. [2024-06-03 20:03:21,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 275 transitions, 4085 flow [2024-06-03 20:03:21,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:03:21,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:03:21,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-03 20:03:21,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 20:03:21,761 INFO L175 Difference]: Start difference. First operand has 199 places, 260 transitions, 3393 flow. Second operand 6 states and 108 transitions. [2024-06-03 20:03:21,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 275 transitions, 4085 flow [2024-06-03 20:03:22,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 275 transitions, 3932 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-03 20:03:22,331 INFO L231 Difference]: Finished difference. Result has 202 places, 263 transitions, 3425 flow [2024-06-03 20:03:22,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3240, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3425, PETRI_PLACES=202, PETRI_TRANSITIONS=263} [2024-06-03 20:03:22,341 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-03 20:03:22,342 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 263 transitions, 3425 flow [2024-06-03 20:03:22,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:22,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:22,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:22,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:03:22,342 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:22,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:22,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1641970189, now seen corresponding path program 1 times [2024-06-03 20:03:22,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:22,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952787603] [2024-06-03 20:03:22,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:22,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:23,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:23,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952787603] [2024-06-03 20:03:23,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952787603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:23,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:23,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 20:03:23,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255894661] [2024-06-03 20:03:23,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:23,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 20:03:23,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:23,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 20:03:23,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-03 20:03:24,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:24,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 263 transitions, 3425 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:03:24,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:24,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:24,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:25,230 INFO L124 PetriNetUnfolderBase]: 2574/4074 cut-off events. [2024-06-03 20:03:25,231 INFO L125 PetriNetUnfolderBase]: For 179243/179247 co-relation queries the response was YES. [2024-06-03 20:03:25,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30141 conditions, 4074 events. 2574/4074 cut-off events. For 179243/179247 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22919 event pairs, 537 based on Foata normal form. 16/4090 useless extension candidates. Maximal degree in co-relation 30044. Up to 3542 conditions per place. [2024-06-03 20:03:25,275 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 223 selfloop transitions, 75 changer transitions 0/302 dead transitions. [2024-06-03 20:03:25,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 302 transitions, 4158 flow [2024-06-03 20:03:25,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:03:25,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:03:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-03 20:03:25,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-03 20:03:25,277 INFO L175 Difference]: Start difference. First operand has 202 places, 263 transitions, 3425 flow. Second operand 10 states and 179 transitions. [2024-06-03 20:03:25,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 302 transitions, 4158 flow [2024-06-03 20:03:25,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 302 transitions, 4029 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-03 20:03:25,822 INFO L231 Difference]: Finished difference. Result has 207 places, 265 transitions, 3459 flow [2024-06-03 20:03:25,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3250, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3459, PETRI_PLACES=207, PETRI_TRANSITIONS=265} [2024-06-03 20:03:25,823 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-03 20:03:25,823 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 265 transitions, 3459 flow [2024-06-03 20:03:25,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:03:25,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:25,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:25,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:03:25,824 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:25,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:25,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1935915863, now seen corresponding path program 1 times [2024-06-03 20:03:25,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:25,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707480845] [2024-06-03 20:03:25,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:25,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:26,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:26,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707480845] [2024-06-03 20:03:26,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707480845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:26,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:26,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:26,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516899318] [2024-06-03 20:03:26,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:26,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:26,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:26,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:26,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:26,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:26,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 265 transitions, 3459 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:26,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:26,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:26,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:27,752 INFO L124 PetriNetUnfolderBase]: 2648/4178 cut-off events. [2024-06-03 20:03:27,752 INFO L125 PetriNetUnfolderBase]: For 183625/183629 co-relation queries the response was YES. [2024-06-03 20:03:27,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31519 conditions, 4178 events. 2648/4178 cut-off events. For 183625/183629 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 23426 event pairs, 539 based on Foata normal form. 8/4186 useless extension candidates. Maximal degree in co-relation 31421. Up to 3816 conditions per place. [2024-06-03 20:03:27,788 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 223 selfloop transitions, 72 changer transitions 0/299 dead transitions. [2024-06-03 20:03:27,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 299 transitions, 4502 flow [2024-06-03 20:03:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:03:27,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:03:27,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 20:03:27,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-03 20:03:27,790 INFO L175 Difference]: Start difference. First operand has 207 places, 265 transitions, 3459 flow. Second operand 8 states and 145 transitions. [2024-06-03 20:03:27,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 299 transitions, 4502 flow [2024-06-03 20:03:28,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 299 transitions, 4204 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-03 20:03:28,167 INFO L231 Difference]: Finished difference. Result has 209 places, 277 transitions, 3627 flow [2024-06-03 20:03:28,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3169, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3627, PETRI_PLACES=209, PETRI_TRANSITIONS=277} [2024-06-03 20:03:28,168 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-03 20:03:28,168 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 277 transitions, 3627 flow [2024-06-03 20:03:28,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:28,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:28,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:28,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:03:28,169 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:28,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:28,169 INFO L85 PathProgramCache]: Analyzing trace with hash 783089885, now seen corresponding path program 2 times [2024-06-03 20:03:28,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:28,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729054875] [2024-06-03 20:03:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:28,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:29,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:29,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729054875] [2024-06-03 20:03:29,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729054875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:29,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:29,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:29,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291029827] [2024-06-03 20:03:29,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:29,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:29,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:29,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:29,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:29,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:29,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 277 transitions, 3627 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:29,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:29,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:29,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:29,896 INFO L124 PetriNetUnfolderBase]: 2668/4206 cut-off events. [2024-06-03 20:03:29,896 INFO L125 PetriNetUnfolderBase]: For 191205/191209 co-relation queries the response was YES. [2024-06-03 20:03:29,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31855 conditions, 4206 events. 2668/4206 cut-off events. For 191205/191209 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23557 event pairs, 543 based on Foata normal form. 8/4214 useless extension candidates. Maximal degree in co-relation 31756. Up to 3942 conditions per place. [2024-06-03 20:03:29,938 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 235 selfloop transitions, 60 changer transitions 0/299 dead transitions. [2024-06-03 20:03:29,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 299 transitions, 4404 flow [2024-06-03 20:03:29,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:03:29,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:03:29,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 20:03:29,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-03 20:03:29,941 INFO L175 Difference]: Start difference. First operand has 209 places, 277 transitions, 3627 flow. Second operand 8 states and 140 transitions. [2024-06-03 20:03:29,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 299 transitions, 4404 flow [2024-06-03 20:03:30,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 299 transitions, 4224 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-03 20:03:30,325 INFO L231 Difference]: Finished difference. Result has 212 places, 281 transitions, 3693 flow [2024-06-03 20:03:30,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3467, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3693, PETRI_PLACES=212, PETRI_TRANSITIONS=281} [2024-06-03 20:03:30,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-03 20:03:30,330 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 281 transitions, 3693 flow [2024-06-03 20:03:30,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:30,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:30,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:30,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:03:30,331 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:30,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:30,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2142719033, now seen corresponding path program 3 times [2024-06-03 20:03:30,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:30,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764375612] [2024-06-03 20:03:30,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:30,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:31,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:31,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764375612] [2024-06-03 20:03:31,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764375612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:31,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:31,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:31,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020551420] [2024-06-03 20:03:31,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:31,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:31,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:31,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:31,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:31,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:31,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 281 transitions, 3693 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:31,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:31,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:31,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:32,171 INFO L124 PetriNetUnfolderBase]: 2656/4190 cut-off events. [2024-06-03 20:03:32,171 INFO L125 PetriNetUnfolderBase]: For 185500/185504 co-relation queries the response was YES. [2024-06-03 20:03:32,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31453 conditions, 4190 events. 2656/4190 cut-off events. For 185500/185504 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 23524 event pairs, 561 based on Foata normal form. 8/4198 useless extension candidates. Maximal degree in co-relation 31353. Up to 4012 conditions per place. [2024-06-03 20:03:32,213 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 259 selfloop transitions, 31 changer transitions 0/294 dead transitions. [2024-06-03 20:03:32,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 294 transitions, 4332 flow [2024-06-03 20:03:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:03:32,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:03:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 20:03:32,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-03 20:03:32,215 INFO L175 Difference]: Start difference. First operand has 212 places, 281 transitions, 3693 flow. Second operand 7 states and 120 transitions. [2024-06-03 20:03:32,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 294 transitions, 4332 flow [2024-06-03 20:03:32,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 294 transitions, 4126 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-03 20:03:32,667 INFO L231 Difference]: Finished difference. Result has 213 places, 281 transitions, 3561 flow [2024-06-03 20:03:32,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3487, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3561, PETRI_PLACES=213, PETRI_TRANSITIONS=281} [2024-06-03 20:03:32,667 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-03 20:03:32,668 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 281 transitions, 3561 flow [2024-06-03 20:03:32,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:32,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:32,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:32,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:03:32,668 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:32,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:32,669 INFO L85 PathProgramCache]: Analyzing trace with hash -813644409, now seen corresponding path program 4 times [2024-06-03 20:03:32,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:32,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320527780] [2024-06-03 20:03:32,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:32,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:33,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:33,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320527780] [2024-06-03 20:03:33,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320527780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:33,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:33,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:33,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320629885] [2024-06-03 20:03:33,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:33,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:33,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:33,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:33,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:33,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:33,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 281 transitions, 3561 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:33,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:33,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:33,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:34,514 INFO L124 PetriNetUnfolderBase]: 2719/4280 cut-off events. [2024-06-03 20:03:34,514 INFO L125 PetriNetUnfolderBase]: For 196914/196918 co-relation queries the response was YES. [2024-06-03 20:03:34,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32331 conditions, 4280 events. 2719/4280 cut-off events. For 196914/196918 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 24009 event pairs, 569 based on Foata normal form. 8/4288 useless extension candidates. Maximal degree in co-relation 32230. Up to 4012 conditions per place. [2024-06-03 20:03:34,559 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 263 selfloop transitions, 51 changer transitions 0/318 dead transitions. [2024-06-03 20:03:34,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 318 transitions, 4664 flow [2024-06-03 20:03:34,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:03:34,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:03:34,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 20:03:34,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-03 20:03:34,560 INFO L175 Difference]: Start difference. First operand has 213 places, 281 transitions, 3561 flow. Second operand 9 states and 159 transitions. [2024-06-03 20:03:34,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 318 transitions, 4664 flow [2024-06-03 20:03:34,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 318 transitions, 4592 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:03:34,996 INFO L231 Difference]: Finished difference. Result has 218 places, 292 transitions, 3876 flow [2024-06-03 20:03:34,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3489, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3876, PETRI_PLACES=218, PETRI_TRANSITIONS=292} [2024-06-03 20:03:34,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-03 20:03:34,997 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 292 transitions, 3876 flow [2024-06-03 20:03:34,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:34,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:34,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:34,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:03:34,997 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:34,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:34,998 INFO L85 PathProgramCache]: Analyzing trace with hash -585743259, now seen corresponding path program 5 times [2024-06-03 20:03:34,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:34,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024195379] [2024-06-03 20:03:34,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:34,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:35,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:35,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024195379] [2024-06-03 20:03:35,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024195379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:35,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:35,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:35,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486387447] [2024-06-03 20:03:35,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:35,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:35,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:35,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:35,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:36,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:36,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 292 transitions, 3876 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:36,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:36,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:36,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:36,940 INFO L124 PetriNetUnfolderBase]: 2771/4352 cut-off events. [2024-06-03 20:03:36,940 INFO L125 PetriNetUnfolderBase]: For 207744/207748 co-relation queries the response was YES. [2024-06-03 20:03:36,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33637 conditions, 4352 events. 2771/4352 cut-off events. For 207744/207748 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 24363 event pairs, 577 based on Foata normal form. 6/4358 useless extension candidates. Maximal degree in co-relation 33534. Up to 3931 conditions per place. [2024-06-03 20:03:36,984 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 249 selfloop transitions, 73 changer transitions 0/326 dead transitions. [2024-06-03 20:03:36,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 326 transitions, 4788 flow [2024-06-03 20:03:36,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:03:36,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:03:36,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 20:03:36,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-03 20:03:36,985 INFO L175 Difference]: Start difference. First operand has 218 places, 292 transitions, 3876 flow. Second operand 8 states and 146 transitions. [2024-06-03 20:03:36,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 326 transitions, 4788 flow [2024-06-03 20:03:37,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 326 transitions, 4628 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-03 20:03:37,521 INFO L231 Difference]: Finished difference. Result has 222 places, 303 transitions, 4055 flow [2024-06-03 20:03:37,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3716, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4055, PETRI_PLACES=222, PETRI_TRANSITIONS=303} [2024-06-03 20:03:37,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-03 20:03:37,522 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 303 transitions, 4055 flow [2024-06-03 20:03:37,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:37,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:37,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:37,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:03:37,523 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:37,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:37,523 INFO L85 PathProgramCache]: Analyzing trace with hash -573363099, now seen corresponding path program 6 times [2024-06-03 20:03:37,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:37,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549275489] [2024-06-03 20:03:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:37,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:38,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:38,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549275489] [2024-06-03 20:03:38,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549275489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:38,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:38,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:38,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607431696] [2024-06-03 20:03:38,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:38,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:38,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:38,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:38,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:38,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:38,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 303 transitions, 4055 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:38,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:38,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:38,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:39,416 INFO L124 PetriNetUnfolderBase]: 2805/4399 cut-off events. [2024-06-03 20:03:39,416 INFO L125 PetriNetUnfolderBase]: For 219989/219993 co-relation queries the response was YES. [2024-06-03 20:03:39,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34702 conditions, 4399 events. 2805/4399 cut-off events. For 219989/219993 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24655 event pairs, 550 based on Foata normal form. 6/4405 useless extension candidates. Maximal degree in co-relation 34597. Up to 3831 conditions per place. [2024-06-03 20:03:39,456 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 221 selfloop transitions, 109 changer transitions 0/334 dead transitions. [2024-06-03 20:03:39,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 334 transitions, 5154 flow [2024-06-03 20:03:39,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:03:39,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:03:39,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 20:03:39,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-03 20:03:39,458 INFO L175 Difference]: Start difference. First operand has 222 places, 303 transitions, 4055 flow. Second operand 8 states and 146 transitions. [2024-06-03 20:03:39,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 334 transitions, 5154 flow [2024-06-03 20:03:40,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 334 transitions, 4985 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-03 20:03:40,038 INFO L231 Difference]: Finished difference. Result has 227 places, 310 transitions, 4374 flow [2024-06-03 20:03:40,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3886, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4374, PETRI_PLACES=227, PETRI_TRANSITIONS=310} [2024-06-03 20:03:40,038 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-03 20:03:40,038 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 310 transitions, 4374 flow [2024-06-03 20:03:40,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:40,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:40,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:40,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:03:40,039 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:40,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:40,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1173687081, now seen corresponding path program 7 times [2024-06-03 20:03:40,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:40,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422372900] [2024-06-03 20:03:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:40,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:41,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:41,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422372900] [2024-06-03 20:03:41,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422372900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:41,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:41,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:41,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984834773] [2024-06-03 20:03:41,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:41,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:41,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:41,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:41,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:41,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:41,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 310 transitions, 4374 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:41,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:41,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:41,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:42,041 INFO L124 PetriNetUnfolderBase]: 2793/4381 cut-off events. [2024-06-03 20:03:42,041 INFO L125 PetriNetUnfolderBase]: For 230215/230219 co-relation queries the response was YES. [2024-06-03 20:03:42,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35319 conditions, 4381 events. 2793/4381 cut-off events. For 230215/230219 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24540 event pairs, 584 based on Foata normal form. 8/4389 useless extension candidates. Maximal degree in co-relation 35212. Up to 4153 conditions per place. [2024-06-03 20:03:42,093 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 283 selfloop transitions, 43 changer transitions 0/330 dead transitions. [2024-06-03 20:03:42,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 330 transitions, 5134 flow [2024-06-03 20:03:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:03:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:03:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:03:42,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-03 20:03:42,094 INFO L175 Difference]: Start difference. First operand has 227 places, 310 transitions, 4374 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:03:42,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 330 transitions, 5134 flow [2024-06-03 20:03:42,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 330 transitions, 4919 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-03 20:03:42,721 INFO L231 Difference]: Finished difference. Result has 230 places, 310 transitions, 4252 flow [2024-06-03 20:03:42,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4159, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4252, PETRI_PLACES=230, PETRI_TRANSITIONS=310} [2024-06-03 20:03:42,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-03 20:03:42,722 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 310 transitions, 4252 flow [2024-06-03 20:03:42,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:42,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:42,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:42,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:03:42,723 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:42,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:42,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1160562921, now seen corresponding path program 8 times [2024-06-03 20:03:42,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:42,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485313086] [2024-06-03 20:03:42,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:42,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:43,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:43,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485313086] [2024-06-03 20:03:43,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485313086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:43,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:43,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:43,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414518822] [2024-06-03 20:03:43,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:43,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:43,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:43,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:43,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:43,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 310 transitions, 4252 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:43,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:43,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:43,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:44,447 INFO L124 PetriNetUnfolderBase]: 2835/4441 cut-off events. [2024-06-03 20:03:44,447 INFO L125 PetriNetUnfolderBase]: For 226933/226937 co-relation queries the response was YES. [2024-06-03 20:03:44,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35899 conditions, 4441 events. 2835/4441 cut-off events. For 226933/226937 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24850 event pairs, 561 based on Foata normal form. 6/4447 useless extension candidates. Maximal degree in co-relation 35792. Up to 4048 conditions per place. [2024-06-03 20:03:44,498 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 251 selfloop transitions, 84 changer transitions 0/339 dead transitions. [2024-06-03 20:03:44,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 339 transitions, 5374 flow [2024-06-03 20:03:44,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:03:44,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:03:44,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 20:03:44,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-03 20:03:44,500 INFO L175 Difference]: Start difference. First operand has 230 places, 310 transitions, 4252 flow. Second operand 8 states and 142 transitions. [2024-06-03 20:03:44,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 339 transitions, 5374 flow [2024-06-03 20:03:45,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 339 transitions, 5251 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 20:03:45,164 INFO L231 Difference]: Finished difference. Result has 232 places, 317 transitions, 4518 flow [2024-06-03 20:03:45,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4133, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4518, PETRI_PLACES=232, PETRI_TRANSITIONS=317} [2024-06-03 20:03:45,164 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-03 20:03:45,164 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 317 transitions, 4518 flow [2024-06-03 20:03:45,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:45,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:45,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:45,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:03:45,165 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:45,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:45,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1160800071, now seen corresponding path program 9 times [2024-06-03 20:03:45,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:45,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984111630] [2024-06-03 20:03:45,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:45,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:46,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:46,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984111630] [2024-06-03 20:03:46,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984111630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:46,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:46,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:46,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925993767] [2024-06-03 20:03:46,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:46,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:46,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:46,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:46,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:46,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:46,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 317 transitions, 4518 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:46,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:46,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:46,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:47,011 INFO L124 PetriNetUnfolderBase]: 2823/4423 cut-off events. [2024-06-03 20:03:47,011 INFO L125 PetriNetUnfolderBase]: For 228879/228883 co-relation queries the response was YES. [2024-06-03 20:03:47,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35775 conditions, 4423 events. 2823/4423 cut-off events. For 228879/228883 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24756 event pairs, 557 based on Foata normal form. 8/4431 useless extension candidates. Maximal degree in co-relation 35666. Up to 4086 conditions per place. [2024-06-03 20:03:47,064 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 264 selfloop transitions, 71 changer transitions 0/339 dead transitions. [2024-06-03 20:03:47,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 339 transitions, 5379 flow [2024-06-03 20:03:47,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:03:47,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:03:47,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 20:03:47,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-03 20:03:47,066 INFO L175 Difference]: Start difference. First operand has 232 places, 317 transitions, 4518 flow. Second operand 8 states and 141 transitions. [2024-06-03 20:03:47,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 339 transitions, 5379 flow [2024-06-03 20:03:47,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 339 transitions, 5178 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-03 20:03:47,826 INFO L231 Difference]: Finished difference. Result has 236 places, 317 transitions, 4466 flow [2024-06-03 20:03:47,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4317, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4466, PETRI_PLACES=236, PETRI_TRANSITIONS=317} [2024-06-03 20:03:47,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-03 20:03:47,827 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 317 transitions, 4466 flow [2024-06-03 20:03:47,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:47,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:47,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:47,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:03:47,827 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:47,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:47,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1481437381, now seen corresponding path program 3 times [2024-06-03 20:03:47,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:47,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447927886] [2024-06-03 20:03:47,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:47,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:48,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:48,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447927886] [2024-06-03 20:03:48,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447927886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:48,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:48,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:48,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566709824] [2024-06-03 20:03:48,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:48,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:48,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:48,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:48,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:48,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:48,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 317 transitions, 4466 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:48,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:48,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:48,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:49,480 INFO L124 PetriNetUnfolderBase]: 2825/4422 cut-off events. [2024-06-03 20:03:49,480 INFO L125 PetriNetUnfolderBase]: For 229949/229949 co-relation queries the response was YES. [2024-06-03 20:03:49,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35916 conditions, 4422 events. 2825/4422 cut-off events. For 229949/229949 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24686 event pairs, 592 based on Foata normal form. 2/4423 useless extension candidates. Maximal degree in co-relation 35805. Up to 4256 conditions per place. [2024-06-03 20:03:49,527 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 306 selfloop transitions, 28 changer transitions 0/338 dead transitions. [2024-06-03 20:03:49,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 338 transitions, 5331 flow [2024-06-03 20:03:49,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:03:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:03:49,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-03 20:03:49,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-03 20:03:49,528 INFO L175 Difference]: Start difference. First operand has 236 places, 317 transitions, 4466 flow. Second operand 8 states and 130 transitions. [2024-06-03 20:03:49,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 338 transitions, 5331 flow [2024-06-03 20:03:50,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 338 transitions, 5152 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 20:03:50,112 INFO L231 Difference]: Finished difference. Result has 239 places, 326 transitions, 4540 flow [2024-06-03 20:03:50,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4287, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4540, PETRI_PLACES=239, PETRI_TRANSITIONS=326} [2024-06-03 20:03:50,113 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-03 20:03:50,113 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 326 transitions, 4540 flow [2024-06-03 20:03:50,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:50,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:50,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:50,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:03:50,114 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:50,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:50,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1333845017, now seen corresponding path program 10 times [2024-06-03 20:03:50,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:50,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403296555] [2024-06-03 20:03:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:50,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:50,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:50,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403296555] [2024-06-03 20:03:50,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403296555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:50,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:50,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:50,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741578574] [2024-06-03 20:03:50,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:50,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:50,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:50,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:50,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:50,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:50,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 326 transitions, 4540 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:50,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:50,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:50,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:51,942 INFO L124 PetriNetUnfolderBase]: 2845/4452 cut-off events. [2024-06-03 20:03:51,942 INFO L125 PetriNetUnfolderBase]: For 243550/243554 co-relation queries the response was YES. [2024-06-03 20:03:51,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36803 conditions, 4452 events. 2845/4452 cut-off events. For 243550/243554 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 24934 event pairs, 585 based on Foata normal form. 8/4460 useless extension candidates. Maximal degree in co-relation 36689. Up to 4289 conditions per place. [2024-06-03 20:03:51,991 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 314 selfloop transitions, 26 changer transitions 0/344 dead transitions. [2024-06-03 20:03:51,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 344 transitions, 5428 flow [2024-06-03 20:03:51,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:03:51,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:03:51,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 20:03:51,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-03 20:03:51,992 INFO L175 Difference]: Start difference. First operand has 239 places, 326 transitions, 4540 flow. Second operand 8 states and 131 transitions. [2024-06-03 20:03:51,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 344 transitions, 5428 flow [2024-06-03 20:03:52,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 344 transitions, 5280 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-03 20:03:52,707 INFO L231 Difference]: Finished difference. Result has 243 places, 330 transitions, 4577 flow [2024-06-03 20:03:52,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4392, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4577, PETRI_PLACES=243, PETRI_TRANSITIONS=330} [2024-06-03 20:03:52,708 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-03 20:03:52,708 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 330 transitions, 4577 flow [2024-06-03 20:03:52,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:52,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:52,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:52,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:03:52,708 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:52,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:52,709 INFO L85 PathProgramCache]: Analyzing trace with hash -312204240, now seen corresponding path program 1 times [2024-06-03 20:03:52,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:52,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105021952] [2024-06-03 20:03:52,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:52,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:53,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:53,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105021952] [2024-06-03 20:03:53,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105021952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:53,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:53,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:53,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469655640] [2024-06-03 20:03:53,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:53,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:53,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:53,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:53,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:53,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:53,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 330 transitions, 4577 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:53,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:53,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:53,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:54,412 INFO L124 PetriNetUnfolderBase]: 2855/4472 cut-off events. [2024-06-03 20:03:54,412 INFO L125 PetriNetUnfolderBase]: For 246379/246383 co-relation queries the response was YES. [2024-06-03 20:03:54,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37048 conditions, 4472 events. 2855/4472 cut-off events. For 246379/246383 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 25088 event pairs, 584 based on Foata normal form. 6/4478 useless extension candidates. Maximal degree in co-relation 36933. Up to 4302 conditions per place. [2024-06-03 20:03:54,464 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 316 selfloop transitions, 31 changer transitions 0/351 dead transitions. [2024-06-03 20:03:54,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 351 transitions, 5560 flow [2024-06-03 20:03:54,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:03:54,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:03:54,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-03 20:03:54,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-03 20:03:54,472 INFO L175 Difference]: Start difference. First operand has 243 places, 330 transitions, 4577 flow. Second operand 7 states and 118 transitions. [2024-06-03 20:03:54,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 351 transitions, 5560 flow [2024-06-03 20:03:55,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 351 transitions, 5419 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-03 20:03:55,144 INFO L231 Difference]: Finished difference. Result has 246 places, 339 transitions, 4759 flow [2024-06-03 20:03:55,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4436, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4759, PETRI_PLACES=246, PETRI_TRANSITIONS=339} [2024-06-03 20:03:55,145 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-03 20:03:55,145 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 339 transitions, 4759 flow [2024-06-03 20:03:55,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:55,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:55,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:55,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:03:55,146 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:55,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:55,146 INFO L85 PathProgramCache]: Analyzing trace with hash -899767300, now seen corresponding path program 2 times [2024-06-03 20:03:55,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:55,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465744642] [2024-06-03 20:03:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:55,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:55,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:55,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465744642] [2024-06-03 20:03:55,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465744642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:55,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:55,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:55,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205667610] [2024-06-03 20:03:55,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:55,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:55,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:55,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:55,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:55,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:55,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 339 transitions, 4759 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:55,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:55,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:55,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:56,873 INFO L124 PetriNetUnfolderBase]: 2857/4477 cut-off events. [2024-06-03 20:03:56,874 INFO L125 PetriNetUnfolderBase]: For 256820/256824 co-relation queries the response was YES. [2024-06-03 20:03:56,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37500 conditions, 4477 events. 2857/4477 cut-off events. For 256820/256824 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 25140 event pairs, 569 based on Foata normal form. 6/4483 useless extension candidates. Maximal degree in co-relation 37382. Up to 4254 conditions per place. [2024-06-03 20:03:56,931 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 303 selfloop transitions, 51 changer transitions 0/358 dead transitions. [2024-06-03 20:03:56,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 358 transitions, 5741 flow [2024-06-03 20:03:56,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:03:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:03:56,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 20:03:56,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-03 20:03:56,933 INFO L175 Difference]: Start difference. First operand has 246 places, 339 transitions, 4759 flow. Second operand 7 states and 120 transitions. [2024-06-03 20:03:56,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 358 transitions, 5741 flow [2024-06-03 20:03:57,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 358 transitions, 5565 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-03 20:03:57,897 INFO L231 Difference]: Finished difference. Result has 250 places, 344 transitions, 4877 flow [2024-06-03 20:03:57,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4583, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4877, PETRI_PLACES=250, PETRI_TRANSITIONS=344} [2024-06-03 20:03:57,898 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-03 20:03:57,898 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 344 transitions, 4877 flow [2024-06-03 20:03:57,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:57,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:03:57,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:03:57,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:03:57,898 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:03:57,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:03:57,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1156713497, now seen corresponding path program 11 times [2024-06-03 20:03:57,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:03:57,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743130317] [2024-06-03 20:03:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:03:57,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:03:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:03:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:03:58,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:03:58,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743130317] [2024-06-03 20:03:58,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743130317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:03:58,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:03:58,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:03:58,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125349997] [2024-06-03 20:03:58,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:03:58,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:03:58,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:03:58,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:03:58,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:03:58,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:03:58,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 344 transitions, 4877 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:03:58,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:03:58,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:03:58,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:03:59,744 INFO L124 PetriNetUnfolderBase]: 2861/4487 cut-off events. [2024-06-03 20:03:59,744 INFO L125 PetriNetUnfolderBase]: For 258715/258719 co-relation queries the response was YES. [2024-06-03 20:03:59,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37711 conditions, 4487 events. 2861/4487 cut-off events. For 258715/258719 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 25272 event pairs, 572 based on Foata normal form. 8/4495 useless extension candidates. Maximal degree in co-relation 37592. Up to 4276 conditions per place. [2024-06-03 20:03:59,798 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 324 selfloop transitions, 36 changer transitions 0/364 dead transitions. [2024-06-03 20:03:59,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 364 transitions, 5839 flow [2024-06-03 20:03:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:03:59,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:03:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 20:03:59,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-03 20:03:59,800 INFO L175 Difference]: Start difference. First operand has 250 places, 344 transitions, 4877 flow. Second operand 8 states and 134 transitions. [2024-06-03 20:03:59,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 364 transitions, 5839 flow [2024-06-03 20:04:00,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 364 transitions, 5675 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-03 20:04:00,543 INFO L231 Difference]: Finished difference. Result has 253 places, 347 transitions, 4883 flow [2024-06-03 20:04:00,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4713, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4883, PETRI_PLACES=253, PETRI_TRANSITIONS=347} [2024-06-03 20:04:00,544 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-03 20:04:00,544 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 347 transitions, 4883 flow [2024-06-03 20:04:00,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:04:00,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:00,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:00,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:04:00,545 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:04:00,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:00,545 INFO L85 PathProgramCache]: Analyzing trace with hash -135102697, now seen corresponding path program 12 times [2024-06-03 20:04:00,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:00,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595477647] [2024-06-03 20:04:00,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:00,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:01,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:01,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595477647] [2024-06-03 20:04:01,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595477647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:01,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:01,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:04:01,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672067410] [2024-06-03 20:04:01,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:01,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:04:01,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:01,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:04:01,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:04:01,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:04:01,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 347 transitions, 4883 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:04:01,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:01,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:04:01,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:02,367 INFO L124 PetriNetUnfolderBase]: 2855/4475 cut-off events. [2024-06-03 20:04:02,368 INFO L125 PetriNetUnfolderBase]: For 250957/250961 co-relation queries the response was YES. [2024-06-03 20:04:02,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37364 conditions, 4475 events. 2855/4475 cut-off events. For 250957/250961 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 25166 event pairs, 569 based on Foata normal form. 6/4481 useless extension candidates. Maximal degree in co-relation 37245. Up to 4220 conditions per place. [2024-06-03 20:04:02,417 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 310 selfloop transitions, 49 changer transitions 0/363 dead transitions. [2024-06-03 20:04:02,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 363 transitions, 5720 flow [2024-06-03 20:04:02,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:02,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:02,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 20:04:02,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-03 20:04:02,419 INFO L175 Difference]: Start difference. First operand has 253 places, 347 transitions, 4883 flow. Second operand 8 states and 134 transitions. [2024-06-03 20:04:02,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 363 transitions, 5720 flow [2024-06-03 20:04:03,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 363 transitions, 5503 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-03 20:04:03,264 INFO L231 Difference]: Finished difference. Result has 254 places, 347 transitions, 4770 flow [2024-06-03 20:04:03,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4666, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4770, PETRI_PLACES=254, PETRI_TRANSITIONS=347} [2024-06-03 20:04:03,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-03 20:04:03,265 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 347 transitions, 4770 flow [2024-06-03 20:04:03,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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) [2024-06-03 20:04:03,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:03,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:03,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:04:03,266 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:04:03,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:03,266 INFO L85 PathProgramCache]: Analyzing trace with hash -573348219, now seen corresponding path program 1 times [2024-06-03 20:04:03,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:03,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814348637] [2024-06-03 20:04:03,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:03,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:04,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:04,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814348637] [2024-06-03 20:04:04,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814348637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:04,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:04,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:04:04,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174991815] [2024-06-03 20:04:04,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:04,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:04:04,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:04:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:04:04,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:04:04,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 347 transitions, 4770 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:04:04,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:04,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:04:04,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:05,414 INFO L124 PetriNetUnfolderBase]: 2863/4485 cut-off events. [2024-06-03 20:04:05,414 INFO L125 PetriNetUnfolderBase]: For 255943/255943 co-relation queries the response was YES. [2024-06-03 20:04:05,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37296 conditions, 4485 events. 2863/4485 cut-off events. For 255943/255943 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 25164 event pairs, 570 based on Foata normal form. 2/4487 useless extension candidates. Maximal degree in co-relation 37177. Up to 4316 conditions per place. [2024-06-03 20:04:05,466 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 337 selfloop transitions, 29 changer transitions 0/370 dead transitions. [2024-06-03 20:04:05,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 370 transitions, 5638 flow [2024-06-03 20:04:05,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:05,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:05,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 20:04:05,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-03 20:04:05,467 INFO L175 Difference]: Start difference. First operand has 254 places, 347 transitions, 4770 flow. Second operand 8 states and 137 transitions. [2024-06-03 20:04:05,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 370 transitions, 5638 flow [2024-06-03 20:04:06,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 370 transitions, 5369 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-03 20:04:06,351 INFO L231 Difference]: Finished difference. Result has 254 places, 349 transitions, 4610 flow [2024-06-03 20:04:06,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4501, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4610, PETRI_PLACES=254, PETRI_TRANSITIONS=349} [2024-06-03 20:04:06,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-03 20:04:06,352 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 349 transitions, 4610 flow [2024-06-03 20:04:06,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:04:06,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:06,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:06,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:04:06,352 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:04:06,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:06,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1160346231, now seen corresponding path program 2 times [2024-06-03 20:04:06,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:06,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798291975] [2024-06-03 20:04:06,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:06,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:07,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:07,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798291975] [2024-06-03 20:04:07,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798291975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:07,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:07,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:04:07,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054710999] [2024-06-03 20:04:07,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:07,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:04:07,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:07,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:04:07,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:04:07,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:04:07,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 349 transitions, 4610 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:07,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:07,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:04:07,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:08,533 INFO L124 PetriNetUnfolderBase]: 2871/4497 cut-off events. [2024-06-03 20:04:08,535 INFO L125 PetriNetUnfolderBase]: For 262937/262937 co-relation queries the response was YES. [2024-06-03 20:04:08,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37160 conditions, 4497 events. 2871/4497 cut-off events. For 262937/262937 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 25255 event pairs, 578 based on Foata normal form. 2/4499 useless extension candidates. Maximal degree in co-relation 37041. Up to 4351 conditions per place. [2024-06-03 20:04:08,587 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 344 selfloop transitions, 21 changer transitions 0/369 dead transitions. [2024-06-03 20:04:08,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 369 transitions, 5468 flow [2024-06-03 20:04:08,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:08,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:08,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:04:08,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-03 20:04:08,588 INFO L175 Difference]: Start difference. First operand has 254 places, 349 transitions, 4610 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:04:08,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 369 transitions, 5468 flow [2024-06-03 20:04:09,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 369 transitions, 5375 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 20:04:09,366 INFO L231 Difference]: Finished difference. Result has 256 places, 351 transitions, 4614 flow [2024-06-03 20:04:09,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4517, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4614, PETRI_PLACES=256, PETRI_TRANSITIONS=351} [2024-06-03 20:04:09,367 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-03 20:04:09,367 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 351 transitions, 4614 flow [2024-06-03 20:04:09,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:09,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:09,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:09,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:04:09,367 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:04:09,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:09,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1160338791, now seen corresponding path program 3 times [2024-06-03 20:04:09,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:09,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107038680] [2024-06-03 20:04:09,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:09,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:10,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:10,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107038680] [2024-06-03 20:04:10,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107038680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:10,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:10,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:04:10,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275527016] [2024-06-03 20:04:10,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:10,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:04:10,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:10,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:04:10,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:04:10,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:04:10,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 351 transitions, 4614 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:04:10,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:10,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:04:10,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:11,484 INFO L124 PetriNetUnfolderBase]: 2879/4509 cut-off events. [2024-06-03 20:04:11,484 INFO L125 PetriNetUnfolderBase]: For 270477/270477 co-relation queries the response was YES. [2024-06-03 20:04:11,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37428 conditions, 4509 events. 2879/4509 cut-off events. For 270477/270477 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 25359 event pairs, 576 based on Foata normal form. 2/4511 useless extension candidates. Maximal degree in co-relation 37308. Up to 4363 conditions per place. [2024-06-03 20:04:11,540 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 347 selfloop transitions, 20 changer transitions 0/371 dead transitions. [2024-06-03 20:04:11,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 371 transitions, 5470 flow [2024-06-03 20:04:11,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:11,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 20:04:11,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-03 20:04:11,550 INFO L175 Difference]: Start difference. First operand has 256 places, 351 transitions, 4614 flow. Second operand 8 states and 132 transitions. [2024-06-03 20:04:11,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 371 transitions, 5470 flow [2024-06-03 20:04:12,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 371 transitions, 5389 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-03 20:04:12,318 INFO L231 Difference]: Finished difference. Result has 258 places, 353 transitions, 4632 flow [2024-06-03 20:04:12,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4533, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4632, PETRI_PLACES=258, PETRI_TRANSITIONS=353} [2024-06-03 20:04:12,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-03 20:04:12,319 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 353 transitions, 4632 flow [2024-06-03 20:04:12,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:04:12,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:12,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:12,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:04:12,320 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:04:12,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:12,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1047231572, now seen corresponding path program 1 times [2024-06-03 20:04:12,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:12,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204238513] [2024-06-03 20:04:12,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:12,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:13,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:13,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204238513] [2024-06-03 20:04:13,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204238513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:13,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:13,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:04:13,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240722703] [2024-06-03 20:04:13,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:13,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:04:13,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:13,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:04:13,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:04:13,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:04:13,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 353 transitions, 4632 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:13,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:13,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:04:13,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:14,482 INFO L124 PetriNetUnfolderBase]: 2873/4501 cut-off events. [2024-06-03 20:04:14,482 INFO L125 PetriNetUnfolderBase]: For 273785/273785 co-relation queries the response was YES. [2024-06-03 20:04:14,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37384 conditions, 4501 events. 2873/4501 cut-off events. For 273785/273785 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 25346 event pairs, 600 based on Foata normal form. 2/4503 useless extension candidates. Maximal degree in co-relation 37263. Up to 4345 conditions per place. [2024-06-03 20:04:14,529 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 339 selfloop transitions, 28 changer transitions 0/371 dead transitions. [2024-06-03 20:04:14,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 371 transitions, 5528 flow [2024-06-03 20:04:14,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:14,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:14,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-03 20:04:14,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-03 20:04:14,531 INFO L175 Difference]: Start difference. First operand has 258 places, 353 transitions, 4632 flow. Second operand 8 states and 130 transitions. [2024-06-03 20:04:14,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 371 transitions, 5528 flow [2024-06-03 20:04:15,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 371 transitions, 5445 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 20:04:15,191 INFO L231 Difference]: Finished difference. Result has 260 places, 356 transitions, 4705 flow [2024-06-03 20:04:15,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4705, PETRI_PLACES=260, PETRI_TRANSITIONS=356} [2024-06-03 20:04:15,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-03 20:04:15,192 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 356 transitions, 4705 flow [2024-06-03 20:04:15,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:15,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:15,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:15,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:04:15,192 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:04:15,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:15,193 INFO L85 PathProgramCache]: Analyzing trace with hash -134886007, now seen corresponding path program 4 times [2024-06-03 20:04:15,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:15,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631218424] [2024-06-03 20:04:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:15,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:16,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:16,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631218424] [2024-06-03 20:04:16,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631218424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:16,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:16,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:04:16,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277838799] [2024-06-03 20:04:16,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:16,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:04:16,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:16,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:04:16,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:04:16,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:04:16,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 356 transitions, 4705 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:16,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:16,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:04:16,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:17,355 INFO L124 PetriNetUnfolderBase]: 2881/4513 cut-off events. [2024-06-03 20:04:17,356 INFO L125 PetriNetUnfolderBase]: For 282168/282168 co-relation queries the response was YES. [2024-06-03 20:04:17,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37886 conditions, 4513 events. 2881/4513 cut-off events. For 282168/282168 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25403 event pairs, 604 based on Foata normal form. 2/4515 useless extension candidates. Maximal degree in co-relation 37764. Up to 4382 conditions per place. [2024-06-03 20:04:17,403 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 352 selfloop transitions, 16 changer transitions 0/372 dead transitions. [2024-06-03 20:04:17,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 372 transitions, 5555 flow [2024-06-03 20:04:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:17,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 20:04:17,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-03 20:04:17,405 INFO L175 Difference]: Start difference. First operand has 260 places, 356 transitions, 4705 flow. Second operand 8 states and 127 transitions. [2024-06-03 20:04:17,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 372 transitions, 5555 flow [2024-06-03 20:04:18,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 372 transitions, 5429 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-03 20:04:18,128 INFO L231 Difference]: Finished difference. Result has 261 places, 358 transitions, 4676 flow [2024-06-03 20:04:18,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4579, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4676, PETRI_PLACES=261, PETRI_TRANSITIONS=358} [2024-06-03 20:04:18,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-03 20:04:18,129 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 358 transitions, 4676 flow [2024-06-03 20:04:18,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:18,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:18,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:18,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:04:18,130 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:04:18,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:18,130 INFO L85 PathProgramCache]: Analyzing trace with hash -890554937, now seen corresponding path program 5 times [2024-06-03 20:04:18,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:18,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564918175] [2024-06-03 20:04:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:18,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:19,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:19,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564918175] [2024-06-03 20:04:19,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564918175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:19,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:19,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:04:19,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418572532] [2024-06-03 20:04:19,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:19,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:04:19,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:19,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:04:19,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:04:19,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:04:19,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 358 transitions, 4676 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:19,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:19,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:04:19,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:20,085 INFO L124 PetriNetUnfolderBase]: 2889/4525 cut-off events. [2024-06-03 20:04:20,085 INFO L125 PetriNetUnfolderBase]: For 282949/282949 co-relation queries the response was YES. [2024-06-03 20:04:20,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37985 conditions, 4525 events. 2889/4525 cut-off events. For 282949/282949 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 25395 event pairs, 602 based on Foata normal form. 2/4527 useless extension candidates. Maximal degree in co-relation 37863. Up to 4389 conditions per place. [2024-06-03 20:04:20,131 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 354 selfloop transitions, 16 changer transitions 0/374 dead transitions. [2024-06-03 20:04:20,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 374 transitions, 5514 flow [2024-06-03 20:04:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-03 20:04:20,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-03 20:04:20,133 INFO L175 Difference]: Start difference. First operand has 261 places, 358 transitions, 4676 flow. Second operand 8 states and 126 transitions. [2024-06-03 20:04:20,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 374 transitions, 5514 flow [2024-06-03 20:04:21,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 374 transitions, 5433 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 20:04:21,021 INFO L231 Difference]: Finished difference. Result has 263 places, 360 transitions, 4696 flow [2024-06-03 20:04:21,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4595, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4696, PETRI_PLACES=263, PETRI_TRANSITIONS=360} [2024-06-03 20:04:21,022 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-03 20:04:21,022 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 360 transitions, 4696 flow [2024-06-03 20:04:21,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:21,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:21,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:21,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:04:21,023 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:04:21,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:21,023 INFO L85 PathProgramCache]: Analyzing trace with hash -134878567, now seen corresponding path program 6 times [2024-06-03 20:04:21,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:21,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346639076] [2024-06-03 20:04:21,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:21,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:22,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:22,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346639076] [2024-06-03 20:04:22,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346639076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:22,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:22,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:04:22,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140983908] [2024-06-03 20:04:22,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:22,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:04:22,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:22,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:04:22,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:04:22,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:04:22,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 360 transitions, 4696 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:22,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:22,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:04:22,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:23,409 INFO L124 PetriNetUnfolderBase]: 2905/4549 cut-off events. [2024-06-03 20:04:23,409 INFO L125 PetriNetUnfolderBase]: For 291252/291252 co-relation queries the response was YES. [2024-06-03 20:04:23,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38307 conditions, 4549 events. 2905/4549 cut-off events. For 291252/291252 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 25634 event pairs, 608 based on Foata normal form. 2/4551 useless extension candidates. Maximal degree in co-relation 38184. Up to 4418 conditions per place. [2024-06-03 20:04:23,470 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 359 selfloop transitions, 15 changer transitions 0/378 dead transitions. [2024-06-03 20:04:23,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 378 transitions, 5564 flow [2024-06-03 20:04:23,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:23,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:23,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-03 20:04:23,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-03 20:04:23,471 INFO L175 Difference]: Start difference. First operand has 263 places, 360 transitions, 4696 flow. Second operand 8 states and 126 transitions. [2024-06-03 20:04:23,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 378 transitions, 5564 flow [2024-06-03 20:04:24,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 378 transitions, 5479 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-03 20:04:24,264 INFO L231 Difference]: Finished difference. Result has 266 places, 364 transitions, 4729 flow [2024-06-03 20:04:24,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4611, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4729, PETRI_PLACES=266, PETRI_TRANSITIONS=364} [2024-06-03 20:04:24,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-03 20:04:24,265 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 364 transitions, 4729 flow [2024-06-03 20:04:24,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:24,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:24,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:24,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:04:24,266 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:04:24,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:24,266 INFO L85 PathProgramCache]: Analyzing trace with hash 121614503, now seen corresponding path program 7 times [2024-06-03 20:04:24,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:24,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757023457] [2024-06-03 20:04:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:24,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:24,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:25,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:25,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757023457] [2024-06-03 20:04:25,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757023457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:25,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:25,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:04:25,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651603020] [2024-06-03 20:04:25,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:25,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:04:25,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:25,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:04:25,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:04:25,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:04:25,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 364 transitions, 4729 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:25,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:25,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:04:25,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:26,371 INFO L124 PetriNetUnfolderBase]: 2913/4561 cut-off events. [2024-06-03 20:04:26,371 INFO L125 PetriNetUnfolderBase]: For 299570/299570 co-relation queries the response was YES. [2024-06-03 20:04:26,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38614 conditions, 4561 events. 2913/4561 cut-off events. For 299570/299570 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 25717 event pairs, 608 based on Foata normal form. 2/4563 useless extension candidates. Maximal degree in co-relation 38489. Up to 4415 conditions per place. [2024-06-03 20:04:26,431 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 350 selfloop transitions, 26 changer transitions 0/380 dead transitions. [2024-06-03 20:04:26,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 380 transitions, 5607 flow [2024-06-03 20:04:26,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:26,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:26,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 20:04:26,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:04:26,432 INFO L175 Difference]: Start difference. First operand has 266 places, 364 transitions, 4729 flow. Second operand 8 states and 128 transitions. [2024-06-03 20:04:26,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 380 transitions, 5607 flow [2024-06-03 20:04:27,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 380 transitions, 5527 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-03 20:04:27,351 INFO L231 Difference]: Finished difference. Result has 270 places, 366 transitions, 4781 flow [2024-06-03 20:04:27,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4649, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4781, PETRI_PLACES=270, PETRI_TRANSITIONS=366} [2024-06-03 20:04:27,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-03 20:04:27,352 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 366 transitions, 4781 flow [2024-06-03 20:04:27,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:27,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:27,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:27,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:04:27,352 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:04:27,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:27,353 INFO L85 PathProgramCache]: Analyzing trace with hash -100969657, now seen corresponding path program 8 times [2024-06-03 20:04:27,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:27,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659294928] [2024-06-03 20:04:27,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:27,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:28,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:28,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659294928] [2024-06-03 20:04:28,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659294928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:28,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:28,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:04:28,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40600622] [2024-06-03 20:04:28,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:28,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:04:28,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:28,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:04:28,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:04:28,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:04:28,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 366 transitions, 4781 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:28,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:28,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:04:28,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:29,322 INFO L124 PetriNetUnfolderBase]: 2908/4554 cut-off events. [2024-06-03 20:04:29,322 INFO L125 PetriNetUnfolderBase]: For 302962/302962 co-relation queries the response was YES. [2024-06-03 20:04:29,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38570 conditions, 4554 events. 2908/4554 cut-off events. For 302962/302962 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 25657 event pairs, 607 based on Foata normal form. 2/4556 useless extension candidates. Maximal degree in co-relation 38444. Up to 4403 conditions per place. [2024-06-03 20:04:29,398 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 354 selfloop transitions, 24 changer transitions 0/382 dead transitions. [2024-06-03 20:04:29,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 382 transitions, 5657 flow [2024-06-03 20:04:29,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:29,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 20:04:29,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-03 20:04:29,400 INFO L175 Difference]: Start difference. First operand has 270 places, 366 transitions, 4781 flow. Second operand 8 states and 127 transitions. [2024-06-03 20:04:29,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 382 transitions, 5657 flow [2024-06-03 20:04:30,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 382 transitions, 5541 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-03 20:04:30,206 INFO L231 Difference]: Finished difference. Result has 272 places, 368 transitions, 4797 flow [2024-06-03 20:04:30,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4669, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4797, PETRI_PLACES=272, PETRI_TRANSITIONS=368} [2024-06-03 20:04:30,206 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-03 20:04:30,207 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 368 transitions, 4797 flow [2024-06-03 20:04:30,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:30,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:30,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:30,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:04:30,207 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:04:30,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:30,208 INFO L85 PathProgramCache]: Analyzing trace with hash 2147117433, now seen corresponding path program 1 times [2024-06-03 20:04:30,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:30,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53460612] [2024-06-03 20:04:30,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:30,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:31,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:31,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53460612] [2024-06-03 20:04:31,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53460612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:31,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:31,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:04:31,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038889021] [2024-06-03 20:04:31,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:31,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:04:31,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:31,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:04:31,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:04:31,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:04:31,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 368 transitions, 4797 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:31,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:31,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:04:31,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:32,349 INFO L124 PetriNetUnfolderBase]: 2939/4593 cut-off events. [2024-06-03 20:04:32,350 INFO L125 PetriNetUnfolderBase]: For 308540/308540 co-relation queries the response was YES. [2024-06-03 20:04:32,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39212 conditions, 4593 events. 2939/4593 cut-off events. For 308540/308540 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 25818 event pairs, 544 based on Foata normal form. 2/4594 useless extension candidates. Maximal degree in co-relation 39085. Up to 4154 conditions per place. [2024-06-03 20:04:32,410 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 299 selfloop transitions, 96 changer transitions 0/399 dead transitions. [2024-06-03 20:04:32,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 399 transitions, 6109 flow [2024-06-03 20:04:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:32,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 20:04:32,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-03 20:04:32,411 INFO L175 Difference]: Start difference. First operand has 272 places, 368 transitions, 4797 flow. Second operand 8 states and 147 transitions. [2024-06-03 20:04:32,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 399 transitions, 6109 flow [2024-06-03 20:04:33,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 399 transitions, 5995 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-03 20:04:33,287 INFO L231 Difference]: Finished difference. Result has 275 places, 377 transitions, 5232 flow [2024-06-03 20:04:33,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4689, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5232, PETRI_PLACES=275, PETRI_TRANSITIONS=377} [2024-06-03 20:04:33,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-03 20:04:33,291 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 377 transitions, 5232 flow [2024-06-03 20:04:33,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:33,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:33,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:33,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:04:33,291 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:04:33,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:33,292 INFO L85 PathProgramCache]: Analyzing trace with hash -143898355, now seen corresponding path program 2 times [2024-06-03 20:04:33,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:33,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029266979] [2024-06-03 20:04:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:33,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:34,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:34,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029266979] [2024-06-03 20:04:34,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029266979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:34,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:34,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:04:34,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157454741] [2024-06-03 20:04:34,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:34,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:04:34,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:34,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:04:34,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:04:34,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:04:34,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 377 transitions, 5232 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:34,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:34,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:04:34,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:35,592 INFO L124 PetriNetUnfolderBase]: 2949/4609 cut-off events. [2024-06-03 20:04:35,592 INFO L125 PetriNetUnfolderBase]: For 313006/313006 co-relation queries the response was YES. [2024-06-03 20:04:35,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39994 conditions, 4609 events. 2949/4609 cut-off events. For 313006/313006 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25968 event pairs, 558 based on Foata normal form. 2/4610 useless extension candidates. Maximal degree in co-relation 39865. Up to 4267 conditions per place. [2024-06-03 20:04:35,653 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 302 selfloop transitions, 91 changer transitions 0/397 dead transitions. [2024-06-03 20:04:35,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 397 transitions, 6222 flow [2024-06-03 20:04:35,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:35,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:35,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 20:04:35,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-03 20:04:35,655 INFO L175 Difference]: Start difference. First operand has 275 places, 377 transitions, 5232 flow. Second operand 8 states and 143 transitions. [2024-06-03 20:04:35,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 397 transitions, 6222 flow [2024-06-03 20:04:36,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 397 transitions, 6054 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-03 20:04:36,618 INFO L231 Difference]: Finished difference. Result has 279 places, 380 transitions, 5392 flow [2024-06-03 20:04:36,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5082, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5392, PETRI_PLACES=279, PETRI_TRANSITIONS=380} [2024-06-03 20:04:36,619 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-03 20:04:36,619 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 380 transitions, 5392 flow [2024-06-03 20:04:36,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:36,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:36,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:36,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:04:36,620 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:04:36,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:36,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1514534523, now seen corresponding path program 3 times [2024-06-03 20:04:36,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:36,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499175260] [2024-06-03 20:04:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:36,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:37,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:37,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:37,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499175260] [2024-06-03 20:04:37,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499175260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:37,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:37,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:04:37,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536592644] [2024-06-03 20:04:37,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:37,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:04:37,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:37,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:04:37,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:04:37,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:04:37,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 380 transitions, 5392 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:04:37,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:37,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:04:37,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:39,087 INFO L124 PetriNetUnfolderBase]: 2953/4615 cut-off events. [2024-06-03 20:04:39,087 INFO L125 PetriNetUnfolderBase]: For 315579/315579 co-relation queries the response was YES. [2024-06-03 20:04:39,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40074 conditions, 4615 events. 2953/4615 cut-off events. For 315579/315579 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 26026 event pairs, 589 based on Foata normal form. 4/4618 useless extension candidates. Maximal degree in co-relation 39944. Up to 4363 conditions per place. [2024-06-03 20:04:39,149 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 329 selfloop transitions, 63 changer transitions 0/396 dead transitions. [2024-06-03 20:04:39,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 396 transitions, 6392 flow [2024-06-03 20:04:39,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:04:39,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:04:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 20:04:39,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:04:39,150 INFO L175 Difference]: Start difference. First operand has 279 places, 380 transitions, 5392 flow. Second operand 7 states and 123 transitions. [2024-06-03 20:04:39,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 396 transitions, 6392 flow [2024-06-03 20:04:40,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 396 transitions, 6074 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-03 20:04:40,248 INFO L231 Difference]: Finished difference. Result has 279 places, 384 transitions, 5397 flow [2024-06-03 20:04:40,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5074, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5397, PETRI_PLACES=279, PETRI_TRANSITIONS=384} [2024-06-03 20:04:40,248 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-03 20:04:40,249 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 384 transitions, 5397 flow [2024-06-03 20:04:40,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:04:40,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:40,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:40,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:04:40,249 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:04:40,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:40,250 INFO L85 PathProgramCache]: Analyzing trace with hash -116477655, now seen corresponding path program 4 times [2024-06-03 20:04:40,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:40,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700048216] [2024-06-03 20:04:40,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:40,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:41,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:41,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700048216] [2024-06-03 20:04:41,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700048216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:41,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:41,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:04:41,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950658383] [2024-06-03 20:04:41,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:41,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:04:41,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:41,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:04:41,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:04:41,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:04:41,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 384 transitions, 5397 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:41,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:41,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:04:41,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:42,931 INFO L124 PetriNetUnfolderBase]: 2990/4680 cut-off events. [2024-06-03 20:04:42,932 INFO L125 PetriNetUnfolderBase]: For 321294/321298 co-relation queries the response was YES. [2024-06-03 20:04:42,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41047 conditions, 4680 events. 2990/4680 cut-off events. For 321294/321298 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 26453 event pairs, 543 based on Foata normal form. 6/4686 useless extension candidates. Maximal degree in co-relation 40917. Up to 4258 conditions per place. [2024-06-03 20:04:42,988 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 332 selfloop transitions, 84 changer transitions 0/420 dead transitions. [2024-06-03 20:04:42,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 420 transitions, 6794 flow [2024-06-03 20:04:42,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:04:42,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:04:42,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 20:04:42,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-03 20:04:42,990 INFO L175 Difference]: Start difference. First operand has 279 places, 384 transitions, 5397 flow. Second operand 9 states and 161 transitions. [2024-06-03 20:04:42,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 420 transitions, 6794 flow [2024-06-03 20:04:43,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 420 transitions, 6545 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-03 20:04:43,907 INFO L231 Difference]: Finished difference. Result has 283 places, 393 transitions, 5650 flow [2024-06-03 20:04:43,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5150, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5650, PETRI_PLACES=283, PETRI_TRANSITIONS=393} [2024-06-03 20:04:43,908 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-03 20:04:43,908 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 393 transitions, 5650 flow [2024-06-03 20:04:43,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:43,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:43,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:43,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:04:43,908 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:04:43,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:43,909 INFO L85 PathProgramCache]: Analyzing trace with hash -116149148, now seen corresponding path program 1 times [2024-06-03 20:04:43,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:43,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032525700] [2024-06-03 20:04:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:43,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:44,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:44,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:44,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032525700] [2024-06-03 20:04:44,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032525700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:44,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:44,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:04:44,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212678505] [2024-06-03 20:04:44,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:44,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:04:44,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:44,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:04:44,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:04:45,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:04:45,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 393 transitions, 5650 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:45,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:45,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:04:45,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:46,037 INFO L124 PetriNetUnfolderBase]: 3084/4812 cut-off events. [2024-06-03 20:04:46,037 INFO L125 PetriNetUnfolderBase]: For 344597/344601 co-relation queries the response was YES. [2024-06-03 20:04:46,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42980 conditions, 4812 events. 3084/4812 cut-off events. For 344597/344601 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 27211 event pairs, 534 based on Foata normal form. 8/4820 useless extension candidates. Maximal degree in co-relation 42849. Up to 4298 conditions per place. [2024-06-03 20:04:46,099 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 338 selfloop transitions, 100 changer transitions 0/442 dead transitions. [2024-06-03 20:04:46,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 442 transitions, 7249 flow [2024-06-03 20:04:46,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:04:46,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:04:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 20:04:46,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-03 20:04:46,100 INFO L175 Difference]: Start difference. First operand has 283 places, 393 transitions, 5650 flow. Second operand 9 states and 163 transitions. [2024-06-03 20:04:46,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 442 transitions, 7249 flow [2024-06-03 20:04:47,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 442 transitions, 6985 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-06-03 20:04:47,035 INFO L231 Difference]: Finished difference. Result has 289 places, 418 transitions, 6175 flow [2024-06-03 20:04:47,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5386, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6175, PETRI_PLACES=289, PETRI_TRANSITIONS=418} [2024-06-03 20:04:47,035 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-03 20:04:47,035 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 418 transitions, 6175 flow [2024-06-03 20:04:47,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:47,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:47,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:47,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:04:47,036 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:04:47,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:47,037 INFO L85 PathProgramCache]: Analyzing trace with hash -116149365, now seen corresponding path program 5 times [2024-06-03 20:04:47,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:47,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074836532] [2024-06-03 20:04:47,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:47,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:48,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:48,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074836532] [2024-06-03 20:04:48,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074836532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:48,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:48,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:04:48,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476690540] [2024-06-03 20:04:48,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:48,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:04:48,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:48,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:04:48,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:04:48,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:04:48,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 418 transitions, 6175 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:48,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:48,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:04:48,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:49,468 INFO L124 PetriNetUnfolderBase]: 3094/4830 cut-off events. [2024-06-03 20:04:49,469 INFO L125 PetriNetUnfolderBase]: For 353008/353012 co-relation queries the response was YES. [2024-06-03 20:04:49,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44107 conditions, 4830 events. 3094/4830 cut-off events. For 353008/353012 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 27320 event pairs, 534 based on Foata normal form. 6/4836 useless extension candidates. Maximal degree in co-relation 43972. Up to 4400 conditions per place. [2024-06-03 20:04:49,542 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 355 selfloop transitions, 86 changer transitions 0/445 dead transitions. [2024-06-03 20:04:49,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 445 transitions, 7407 flow [2024-06-03 20:04:49,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:04:49,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:04:49,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 20:04:49,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-03 20:04:49,544 INFO L175 Difference]: Start difference. First operand has 289 places, 418 transitions, 6175 flow. Second operand 9 states and 159 transitions. [2024-06-03 20:04:49,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 445 transitions, 7407 flow [2024-06-03 20:04:50,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 445 transitions, 7171 flow, removed 91 selfloop flow, removed 4 redundant places. [2024-06-03 20:04:50,715 INFO L231 Difference]: Finished difference. Result has 294 places, 421 transitions, 6212 flow [2024-06-03 20:04:50,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5939, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6212, PETRI_PLACES=294, PETRI_TRANSITIONS=421} [2024-06-03 20:04:50,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-03 20:04:50,715 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 421 transitions, 6212 flow [2024-06-03 20:04:50,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:50,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:50,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:50,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:04:50,717 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:04:50,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:50,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1494009154, now seen corresponding path program 1 times [2024-06-03 20:04:50,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:50,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060280820] [2024-06-03 20:04:50,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:50,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:51,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:51,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060280820] [2024-06-03 20:04:51,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060280820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:51,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:51,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:04:51,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226762039] [2024-06-03 20:04:51,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:51,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:04:51,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:51,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:04:51,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:04:51,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:04:51,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 421 transitions, 6212 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:51,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:51,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:04:51,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:52,884 INFO L124 PetriNetUnfolderBase]: 3138/4896 cut-off events. [2024-06-03 20:04:52,884 INFO L125 PetriNetUnfolderBase]: For 384775/384775 co-relation queries the response was YES. [2024-06-03 20:04:52,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44913 conditions, 4896 events. 3138/4896 cut-off events. For 384775/384775 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 27863 event pairs, 554 based on Foata normal form. 12/4907 useless extension candidates. Maximal degree in co-relation 44776. Up to 4530 conditions per place. [2024-06-03 20:04:52,949 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 373 selfloop transitions, 68 changer transitions 0/445 dead transitions. [2024-06-03 20:04:52,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 445 transitions, 7371 flow [2024-06-03 20:04:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:04:52,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:04:52,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 20:04:52,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 20:04:52,951 INFO L175 Difference]: Start difference. First operand has 294 places, 421 transitions, 6212 flow. Second operand 8 states and 144 transitions. [2024-06-03 20:04:52,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 445 transitions, 7371 flow [2024-06-03 20:04:54,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 445 transitions, 7165 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-03 20:04:54,061 INFO L231 Difference]: Finished difference. Result has 296 places, 422 transitions, 6189 flow [2024-06-03 20:04:54,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6006, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6189, PETRI_PLACES=296, PETRI_TRANSITIONS=422} [2024-06-03 20:04:54,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-03 20:04:54,062 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 422 transitions, 6189 flow [2024-06-03 20:04:54,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:54,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:54,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:54,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:04:54,062 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:04:54,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:54,063 INFO L85 PathProgramCache]: Analyzing trace with hash -93639692, now seen corresponding path program 2 times [2024-06-03 20:04:54,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:54,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718338743] [2024-06-03 20:04:54,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:54,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:55,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:55,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718338743] [2024-06-03 20:04:55,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718338743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:55,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:55,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:04:55,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596739389] [2024-06-03 20:04:55,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:55,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:04:55,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:55,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:04:55,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:04:55,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:04:55,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 422 transitions, 6189 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:55,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:55,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:04:55,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:04:56,266 INFO L124 PetriNetUnfolderBase]: 3158/4928 cut-off events. [2024-06-03 20:04:56,266 INFO L125 PetriNetUnfolderBase]: For 375015/375019 co-relation queries the response was YES. [2024-06-03 20:04:56,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45285 conditions, 4928 events. 3158/4928 cut-off events. For 375015/375019 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 28029 event pairs, 561 based on Foata normal form. 8/4936 useless extension candidates. Maximal degree in co-relation 45147. Up to 4621 conditions per place. [2024-06-03 20:04:56,336 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 376 selfloop transitions, 66 changer transitions 0/446 dead transitions. [2024-06-03 20:04:56,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 446 transitions, 7316 flow [2024-06-03 20:04:56,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:04:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:04:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 20:04:56,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-03 20:04:56,338 INFO L175 Difference]: Start difference. First operand has 296 places, 422 transitions, 6189 flow. Second operand 9 states and 156 transitions. [2024-06-03 20:04:56,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 446 transitions, 7316 flow [2024-06-03 20:04:57,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 446 transitions, 7177 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 20:04:57,640 INFO L231 Difference]: Finished difference. Result has 299 places, 426 transitions, 6336 flow [2024-06-03 20:04:57,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6050, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6336, PETRI_PLACES=299, PETRI_TRANSITIONS=426} [2024-06-03 20:04:57,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-03 20:04:57,641 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 426 transitions, 6336 flow [2024-06-03 20:04:57,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:57,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:04:57,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:04:57,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:04:57,642 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:04:57,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:04:57,642 INFO L85 PathProgramCache]: Analyzing trace with hash -111507735, now seen corresponding path program 6 times [2024-06-03 20:04:57,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:04:57,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295913835] [2024-06-03 20:04:57,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:04:57,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:04:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:04:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:04:58,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:04:58,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295913835] [2024-06-03 20:04:58,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295913835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:04:58,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:04:58,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:04:58,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953547209] [2024-06-03 20:04:58,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:04:58,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:04:58,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:04:58,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:04:58,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:04:59,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:04:59,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 426 transitions, 6336 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:04:59,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:04:59,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:04:59,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:00,226 INFO L124 PetriNetUnfolderBase]: 3168/4946 cut-off events. [2024-06-03 20:05:00,227 INFO L125 PetriNetUnfolderBase]: For 377372/377376 co-relation queries the response was YES. [2024-06-03 20:05:00,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45543 conditions, 4946 events. 3168/4946 cut-off events. For 377372/377376 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 28180 event pairs, 561 based on Foata normal form. 6/4952 useless extension candidates. Maximal degree in co-relation 45404. Up to 4651 conditions per place. [2024-06-03 20:05:00,297 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 382 selfloop transitions, 63 changer transitions 0/449 dead transitions. [2024-06-03 20:05:00,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 449 transitions, 7431 flow [2024-06-03 20:05:00,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:05:00,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:05:00,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 20:05:00,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-03 20:05:00,299 INFO L175 Difference]: Start difference. First operand has 299 places, 426 transitions, 6336 flow. Second operand 9 states and 154 transitions. [2024-06-03 20:05:00,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 449 transitions, 7431 flow [2024-06-03 20:05:01,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 449 transitions, 7197 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-03 20:05:01,502 INFO L231 Difference]: Finished difference. Result has 301 places, 429 transitions, 6338 flow [2024-06-03 20:05:01,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6102, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6338, PETRI_PLACES=301, PETRI_TRANSITIONS=429} [2024-06-03 20:05:01,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-03 20:05:01,503 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 429 transitions, 6338 flow [2024-06-03 20:05:01,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:01,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:01,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:01,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:05:01,504 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:01,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:01,504 INFO L85 PathProgramCache]: Analyzing trace with hash -784535546, now seen corresponding path program 2 times [2024-06-03 20:05:01,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:01,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850193732] [2024-06-03 20:05:01,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:01,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:02,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:02,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:02,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850193732] [2024-06-03 20:05:02,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850193732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:02,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:02,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:02,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107417258] [2024-06-03 20:05:02,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:02,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:02,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:02,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:02,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:02,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:05:02,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 429 transitions, 6338 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:02,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:02,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:05:02,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:03,558 INFO L124 PetriNetUnfolderBase]: 3196/4994 cut-off events. [2024-06-03 20:05:03,558 INFO L125 PetriNetUnfolderBase]: For 400625/400629 co-relation queries the response was YES. [2024-06-03 20:05:03,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45967 conditions, 4994 events. 3196/4994 cut-off events. For 400625/400629 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 28520 event pairs, 602 based on Foata normal form. 12/5006 useless extension candidates. Maximal degree in co-relation 45827. Up to 4775 conditions per place. [2024-06-03 20:05:03,626 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 416 selfloop transitions, 27 changer transitions 0/447 dead transitions. [2024-06-03 20:05:03,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 447 transitions, 7446 flow [2024-06-03 20:05:03,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:05:03,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:05:03,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-03 20:05:03,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:05:03,627 INFO L175 Difference]: Start difference. First operand has 301 places, 429 transitions, 6338 flow. Second operand 7 states and 119 transitions. [2024-06-03 20:05:03,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 447 transitions, 7446 flow [2024-06-03 20:05:04,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 447 transitions, 7244 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-03 20:05:04,770 INFO L231 Difference]: Finished difference. Result has 302 places, 432 transitions, 6299 flow [2024-06-03 20:05:04,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6136, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6299, PETRI_PLACES=302, PETRI_TRANSITIONS=432} [2024-06-03 20:05:04,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-03 20:05:04,770 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 432 transitions, 6299 flow [2024-06-03 20:05:04,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:04,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:04,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:04,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:05:04,771 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:04,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:04,771 INFO L85 PathProgramCache]: Analyzing trace with hash 997009908, now seen corresponding path program 3 times [2024-06-03 20:05:04,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:04,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064830743] [2024-06-03 20:05:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:04,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:05,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:05,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064830743] [2024-06-03 20:05:05,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064830743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:05,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:05,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:05,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345542189] [2024-06-03 20:05:05,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:05,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:05,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:05,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:05,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:05,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:05:05,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 432 transitions, 6299 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:05,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:05,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:05:05,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:07,062 INFO L124 PetriNetUnfolderBase]: 3240/5058 cut-off events. [2024-06-03 20:05:07,062 INFO L125 PetriNetUnfolderBase]: For 427698/427698 co-relation queries the response was YES. [2024-06-03 20:05:07,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46900 conditions, 5058 events. 3240/5058 cut-off events. For 427698/427698 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 29039 event pairs, 623 based on Foata normal form. 12/5069 useless extension candidates. Maximal degree in co-relation 46758. Up to 4785 conditions per place. [2024-06-03 20:05:07,150 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 414 selfloop transitions, 33 changer transitions 0/451 dead transitions. [2024-06-03 20:05:07,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 451 transitions, 7450 flow [2024-06-03 20:05:07,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:05:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:05:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 20:05:07,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-03 20:05:07,151 INFO L175 Difference]: Start difference. First operand has 302 places, 432 transitions, 6299 flow. Second operand 7 states and 124 transitions. [2024-06-03 20:05:07,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 451 transitions, 7450 flow [2024-06-03 20:05:08,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 451 transitions, 7345 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-03 20:05:08,622 INFO L231 Difference]: Finished difference. Result has 305 places, 433 transitions, 6311 flow [2024-06-03 20:05:08,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6194, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6311, PETRI_PLACES=305, PETRI_TRANSITIONS=433} [2024-06-03 20:05:08,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-03 20:05:08,622 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 433 transitions, 6311 flow [2024-06-03 20:05:08,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:08,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:08,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:08,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:05:08,623 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:08,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:08,623 INFO L85 PathProgramCache]: Analyzing trace with hash 997002747, now seen corresponding path program 7 times [2024-06-03 20:05:08,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:08,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006597705] [2024-06-03 20:05:08,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:08,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:09,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:09,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:09,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006597705] [2024-06-03 20:05:09,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006597705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:09,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:09,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:09,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571808132] [2024-06-03 20:05:09,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:09,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:09,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:09,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:09,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:09,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:05:09,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 433 transitions, 6311 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:09,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:09,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:05:09,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:11,140 INFO L124 PetriNetUnfolderBase]: 3234/5054 cut-off events. [2024-06-03 20:05:11,141 INFO L125 PetriNetUnfolderBase]: For 404885/404889 co-relation queries the response was YES. [2024-06-03 20:05:11,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46654 conditions, 5054 events. 3234/5054 cut-off events. For 404885/404889 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 29095 event pairs, 613 based on Foata normal form. 6/5060 useless extension candidates. Maximal degree in co-relation 46511. Up to 4841 conditions per place. [2024-06-03 20:05:11,204 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 410 selfloop transitions, 34 changer transitions 0/448 dead transitions. [2024-06-03 20:05:11,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 448 transitions, 7280 flow [2024-06-03 20:05:11,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:05:11,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:05:11,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 20:05:11,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-03 20:05:11,206 INFO L175 Difference]: Start difference. First operand has 305 places, 433 transitions, 6311 flow. Second operand 8 states and 134 transitions. [2024-06-03 20:05:11,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 448 transitions, 7280 flow [2024-06-03 20:05:12,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 448 transitions, 7149 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-03 20:05:12,547 INFO L231 Difference]: Finished difference. Result has 309 places, 433 transitions, 6254 flow [2024-06-03 20:05:12,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6180, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6254, PETRI_PLACES=309, PETRI_TRANSITIONS=433} [2024-06-03 20:05:12,548 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-03 20:05:12,548 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 433 transitions, 6254 flow [2024-06-03 20:05:12,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:12,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:12,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:12,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:05:12,549 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:12,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:12,549 INFO L85 PathProgramCache]: Analyzing trace with hash 997002964, now seen corresponding path program 3 times [2024-06-03 20:05:12,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:12,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743003847] [2024-06-03 20:05:12,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:12,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:13,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:13,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743003847] [2024-06-03 20:05:13,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743003847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:13,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:13,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:13,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974304575] [2024-06-03 20:05:13,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:13,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:13,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:13,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:13,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:13,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:05:13,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 433 transitions, 6254 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:13,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:13,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:05:13,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:14,840 INFO L124 PetriNetUnfolderBase]: 3222/5036 cut-off events. [2024-06-03 20:05:14,840 INFO L125 PetriNetUnfolderBase]: For 402889/402893 co-relation queries the response was YES. [2024-06-03 20:05:14,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46004 conditions, 5036 events. 3222/5036 cut-off events. For 402889/402893 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 28933 event pairs, 609 based on Foata normal form. 8/5044 useless extension candidates. Maximal degree in co-relation 45860. Up to 4809 conditions per place. [2024-06-03 20:05:14,898 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 407 selfloop transitions, 37 changer transitions 0/448 dead transitions. [2024-06-03 20:05:14,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 448 transitions, 7223 flow [2024-06-03 20:05:14,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:05:14,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:05:14,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 20:05:14,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:05:14,900 INFO L175 Difference]: Start difference. First operand has 309 places, 433 transitions, 6254 flow. Second operand 8 states and 136 transitions. [2024-06-03 20:05:14,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 448 transitions, 7223 flow [2024-06-03 20:05:16,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 448 transitions, 7089 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-03 20:05:16,096 INFO L231 Difference]: Finished difference. Result has 311 places, 433 transitions, 6204 flow [2024-06-03 20:05:16,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6120, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6204, PETRI_PLACES=311, PETRI_TRANSITIONS=433} [2024-06-03 20:05:16,096 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-03 20:05:16,097 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 433 transitions, 6204 flow [2024-06-03 20:05:16,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:16,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:16,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:16,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:05:16,097 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:16,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:16,098 INFO L85 PathProgramCache]: Analyzing trace with hash -377224462, now seen corresponding path program 4 times [2024-06-03 20:05:16,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:16,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272988816] [2024-06-03 20:05:16,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:16,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:17,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:17,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272988816] [2024-06-03 20:05:17,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272988816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:17,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:17,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:17,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464369906] [2024-06-03 20:05:17,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:17,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:17,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:17,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:17,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:17,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:05:17,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 433 transitions, 6204 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:17,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:17,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:05:17,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:18,332 INFO L124 PetriNetUnfolderBase]: 3294/5150 cut-off events. [2024-06-03 20:05:18,332 INFO L125 PetriNetUnfolderBase]: For 434564/434568 co-relation queries the response was YES. [2024-06-03 20:05:18,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47349 conditions, 5150 events. 3294/5150 cut-off events. For 434564/434568 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 29725 event pairs, 625 based on Foata normal form. 14/5164 useless extension candidates. Maximal degree in co-relation 47204. Up to 4848 conditions per place. [2024-06-03 20:05:18,404 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 406 selfloop transitions, 42 changer transitions 0/452 dead transitions. [2024-06-03 20:05:18,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 452 transitions, 7372 flow [2024-06-03 20:05:18,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:05:18,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:05:18,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 20:05:18,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:05:18,406 INFO L175 Difference]: Start difference. First operand has 311 places, 433 transitions, 6204 flow. Second operand 7 states and 123 transitions. [2024-06-03 20:05:18,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 452 transitions, 7372 flow [2024-06-03 20:05:19,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 452 transitions, 7254 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 20:05:19,647 INFO L231 Difference]: Finished difference. Result has 312 places, 435 transitions, 6256 flow [2024-06-03 20:05:19,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6086, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6256, PETRI_PLACES=312, PETRI_TRANSITIONS=435} [2024-06-03 20:05:19,647 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-03 20:05:19,647 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 435 transitions, 6256 flow [2024-06-03 20:05:19,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:19,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:19,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:19,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:05:19,648 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:19,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:19,648 INFO L85 PathProgramCache]: Analyzing trace with hash 546499833, now seen corresponding path program 8 times [2024-06-03 20:05:19,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:19,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736940832] [2024-06-03 20:05:19,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:19,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:21,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:21,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736940832] [2024-06-03 20:05:21,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736940832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:21,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:21,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:21,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647986454] [2024-06-03 20:05:21,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:21,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:21,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:21,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:21,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:21,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:05:21,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 435 transitions, 6256 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:21,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:21,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:05:21,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:22,616 INFO L124 PetriNetUnfolderBase]: 3331/5211 cut-off events. [2024-06-03 20:05:22,616 INFO L125 PetriNetUnfolderBase]: For 433170/433174 co-relation queries the response was YES. [2024-06-03 20:05:22,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48411 conditions, 5211 events. 3331/5211 cut-off events. For 433170/433174 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 30187 event pairs, 637 based on Foata normal form. 6/5217 useless extension candidates. Maximal degree in co-relation 48265. Up to 4885 conditions per place. [2024-06-03 20:05:22,687 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 412 selfloop transitions, 59 changer transitions 0/475 dead transitions. [2024-06-03 20:05:22,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 475 transitions, 7854 flow [2024-06-03 20:05:22,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:05:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:05:22,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-03 20:05:22,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-03 20:05:22,689 INFO L175 Difference]: Start difference. First operand has 312 places, 435 transitions, 6256 flow. Second operand 10 states and 176 transitions. [2024-06-03 20:05:22,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 475 transitions, 7854 flow [2024-06-03 20:05:24,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 475 transitions, 7762 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 20:05:24,030 INFO L231 Difference]: Finished difference. Result has 318 places, 444 transitions, 6635 flow [2024-06-03 20:05:24,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6164, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6635, PETRI_PLACES=318, PETRI_TRANSITIONS=444} [2024-06-03 20:05:24,031 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-03 20:05:24,031 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 444 transitions, 6635 flow [2024-06-03 20:05:24,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:24,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:24,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:24,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:05:24,031 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:24,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:24,032 INFO L85 PathProgramCache]: Analyzing trace with hash 546828123, now seen corresponding path program 9 times [2024-06-03 20:05:24,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:24,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240164734] [2024-06-03 20:05:24,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:24,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:25,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:25,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:25,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240164734] [2024-06-03 20:05:25,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240164734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:25,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:25,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:25,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860001396] [2024-06-03 20:05:25,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:25,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:25,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:25,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:25,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:25,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:05:25,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 444 transitions, 6635 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:25,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:25,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:05:25,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:26,837 INFO L124 PetriNetUnfolderBase]: 3341/5229 cut-off events. [2024-06-03 20:05:26,837 INFO L125 PetriNetUnfolderBase]: For 449098/449102 co-relation queries the response was YES. [2024-06-03 20:05:26,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49144 conditions, 5229 events. 3341/5229 cut-off events. For 449098/449102 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 30355 event pairs, 637 based on Foata normal form. 6/5235 useless extension candidates. Maximal degree in co-relation 48996. Up to 4895 conditions per place. [2024-06-03 20:05:26,908 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 410 selfloop transitions, 61 changer transitions 0/475 dead transitions. [2024-06-03 20:05:26,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 475 transitions, 8046 flow [2024-06-03 20:05:26,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:05:26,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:05:26,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-03 20:05:26,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219512195121951 [2024-06-03 20:05:26,910 INFO L175 Difference]: Start difference. First operand has 318 places, 444 transitions, 6635 flow. Second operand 10 states and 173 transitions. [2024-06-03 20:05:26,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 475 transitions, 8046 flow [2024-06-03 20:05:28,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 475 transitions, 7688 flow, removed 129 selfloop flow, removed 7 redundant places. [2024-06-03 20:05:28,535 INFO L231 Difference]: Finished difference. Result has 321 places, 447 transitions, 6554 flow [2024-06-03 20:05:28,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6331, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6554, PETRI_PLACES=321, PETRI_TRANSITIONS=447} [2024-06-03 20:05:28,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-03 20:05:28,536 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 447 transitions, 6554 flow [2024-06-03 20:05:28,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:28,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:28,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:28,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 20:05:28,537 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:28,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:28,537 INFO L85 PathProgramCache]: Analyzing trace with hash -2024732880, now seen corresponding path program 4 times [2024-06-03 20:05:28,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:28,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251710961] [2024-06-03 20:05:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:28,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:29,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:29,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251710961] [2024-06-03 20:05:29,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251710961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:29,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:29,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:29,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684287802] [2024-06-03 20:05:29,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:29,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:29,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:29,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:29,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:29,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:05:29,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 447 transitions, 6554 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:29,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:29,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:05:29,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:31,023 INFO L124 PetriNetUnfolderBase]: 3393/5297 cut-off events. [2024-06-03 20:05:31,023 INFO L125 PetriNetUnfolderBase]: For 469911/469915 co-relation queries the response was YES. [2024-06-03 20:05:31,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49822 conditions, 5297 events. 3393/5297 cut-off events. For 469911/469915 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 30725 event pairs, 638 based on Foata normal form. 8/5305 useless extension candidates. Maximal degree in co-relation 49673. Up to 4933 conditions per place. [2024-06-03 20:05:31,101 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 419 selfloop transitions, 65 changer transitions 0/488 dead transitions. [2024-06-03 20:05:31,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 488 transitions, 8226 flow [2024-06-03 20:05:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:05:31,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:05:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-03 20:05:31,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-03 20:05:31,116 INFO L175 Difference]: Start difference. First operand has 321 places, 447 transitions, 6554 flow. Second operand 10 states and 176 transitions. [2024-06-03 20:05:31,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 488 transitions, 8226 flow [2024-06-03 20:05:33,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 488 transitions, 8043 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-03 20:05:33,109 INFO L231 Difference]: Finished difference. Result has 326 places, 460 transitions, 6935 flow [2024-06-03 20:05:33,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6371, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6935, PETRI_PLACES=326, PETRI_TRANSITIONS=460} [2024-06-03 20:05:33,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-03 20:05:33,110 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 460 transitions, 6935 flow [2024-06-03 20:05:33,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:33,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:33,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:33,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 20:05:33,111 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:33,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:33,111 INFO L85 PathProgramCache]: Analyzing trace with hash -637494679, now seen corresponding path program 10 times [2024-06-03 20:05:33,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:33,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431534493] [2024-06-03 20:05:33,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:33,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:34,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:34,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431534493] [2024-06-03 20:05:34,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431534493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:34,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:34,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:34,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249581394] [2024-06-03 20:05:34,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:34,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:34,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:34,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:34,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:34,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:05:34,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 460 transitions, 6935 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:34,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:34,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:05:34,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:35,638 INFO L124 PetriNetUnfolderBase]: 3387/5293 cut-off events. [2024-06-03 20:05:35,639 INFO L125 PetriNetUnfolderBase]: For 476098/476102 co-relation queries the response was YES. [2024-06-03 20:05:35,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50344 conditions, 5293 events. 3387/5293 cut-off events. For 476098/476102 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 30750 event pairs, 645 based on Foata normal form. 6/5299 useless extension candidates. Maximal degree in co-relation 50192. Up to 5015 conditions per place. [2024-06-03 20:05:35,716 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 432 selfloop transitions, 46 changer transitions 0/482 dead transitions. [2024-06-03 20:05:35,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 482 transitions, 8033 flow [2024-06-03 20:05:35,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:05:35,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:05:35,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 20:05:35,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:05:35,718 INFO L175 Difference]: Start difference. First operand has 326 places, 460 transitions, 6935 flow. Second operand 9 states and 153 transitions. [2024-06-03 20:05:35,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 482 transitions, 8033 flow [2024-06-03 20:05:37,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 482 transitions, 7667 flow, removed 160 selfloop flow, removed 5 redundant places. [2024-06-03 20:05:37,780 INFO L231 Difference]: Finished difference. Result has 330 places, 460 transitions, 6667 flow [2024-06-03 20:05:37,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6569, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6667, PETRI_PLACES=330, PETRI_TRANSITIONS=460} [2024-06-03 20:05:37,781 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-03 20:05:37,781 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 460 transitions, 6667 flow [2024-06-03 20:05:37,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:37,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:37,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:37,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 20:05:37,782 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:37,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:37,782 INFO L85 PathProgramCache]: Analyzing trace with hash -637494462, now seen corresponding path program 5 times [2024-06-03 20:05:37,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:37,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724519977] [2024-06-03 20:05:37,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:37,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:38,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:38,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724519977] [2024-06-03 20:05:38,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724519977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:38,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:38,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:38,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791532688] [2024-06-03 20:05:38,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:38,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:38,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:38,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:38,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:38,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:05:38,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 460 transitions, 6667 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:38,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:38,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:05:38,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:40,079 INFO L124 PetriNetUnfolderBase]: 3375/5275 cut-off events. [2024-06-03 20:05:40,079 INFO L125 PetriNetUnfolderBase]: For 470589/470593 co-relation queries the response was YES. [2024-06-03 20:05:40,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49391 conditions, 5275 events. 3375/5275 cut-off events. For 470589/470593 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 30621 event pairs, 643 based on Foata normal form. 8/5283 useless extension candidates. Maximal degree in co-relation 49237. Up to 4991 conditions per place. [2024-06-03 20:05:40,160 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 431 selfloop transitions, 47 changer transitions 0/482 dead transitions. [2024-06-03 20:05:40,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 482 transitions, 7765 flow [2024-06-03 20:05:40,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:05:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:05:40,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 20:05:40,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-03 20:05:40,162 INFO L175 Difference]: Start difference. First operand has 330 places, 460 transitions, 6667 flow. Second operand 9 states and 154 transitions. [2024-06-03 20:05:40,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 482 transitions, 7765 flow [2024-06-03 20:05:41,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 482 transitions, 7621 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-03 20:05:41,962 INFO L231 Difference]: Finished difference. Result has 333 places, 460 transitions, 6624 flow [2024-06-03 20:05:41,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6523, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6624, PETRI_PLACES=333, PETRI_TRANSITIONS=460} [2024-06-03 20:05:41,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-03 20:05:41,963 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 460 transitions, 6624 flow [2024-06-03 20:05:41,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:41,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:41,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:41,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 20:05:41,964 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:41,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:41,964 INFO L85 PathProgramCache]: Analyzing trace with hash -637487518, now seen corresponding path program 5 times [2024-06-03 20:05:41,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:41,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672544350] [2024-06-03 20:05:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:41,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:42,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:42,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672544350] [2024-06-03 20:05:42,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672544350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:42,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:42,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:42,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302750764] [2024-06-03 20:05:42,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:42,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:42,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:42,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:42,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:43,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:05:43,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 460 transitions, 6624 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:43,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:43,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:05:43,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:44,359 INFO L124 PetriNetUnfolderBase]: 3419/5341 cut-off events. [2024-06-03 20:05:44,360 INFO L125 PetriNetUnfolderBase]: For 510092/510092 co-relation queries the response was YES. [2024-06-03 20:05:44,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50311 conditions, 5341 events. 3419/5341 cut-off events. For 510092/510092 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 31085 event pairs, 660 based on Foata normal form. 12/5352 useless extension candidates. Maximal degree in co-relation 50156. Up to 5009 conditions per place. [2024-06-03 20:05:44,437 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 438 selfloop transitions, 44 changer transitions 0/486 dead transitions. [2024-06-03 20:05:44,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 486 transitions, 7918 flow [2024-06-03 20:05:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:05:44,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:05:44,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 20:05:44,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-03 20:05:44,446 INFO L175 Difference]: Start difference. First operand has 333 places, 460 transitions, 6624 flow. Second operand 8 states and 142 transitions. [2024-06-03 20:05:44,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 486 transitions, 7918 flow [2024-06-03 20:05:46,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 486 transitions, 7781 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 20:05:46,586 INFO L231 Difference]: Finished difference. Result has 333 places, 461 transitions, 6624 flow [2024-06-03 20:05:46,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6487, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6624, PETRI_PLACES=333, PETRI_TRANSITIONS=461} [2024-06-03 20:05:46,587 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-03 20:05:46,587 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 461 transitions, 6624 flow [2024-06-03 20:05:46,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:46,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:46,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:46,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 20:05:46,588 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:46,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:46,588 INFO L85 PathProgramCache]: Analyzing trace with hash -978499109, now seen corresponding path program 11 times [2024-06-03 20:05:46,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:46,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254336833] [2024-06-03 20:05:46,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:46,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:47,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:47,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254336833] [2024-06-03 20:05:47,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254336833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:47,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:47,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:47,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826075675] [2024-06-03 20:05:47,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:47,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:47,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:47,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:47,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:48,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:05:48,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 461 transitions, 6624 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:48,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:48,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:05:48,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:49,684 INFO L124 PetriNetUnfolderBase]: 3568/5579 cut-off events. [2024-06-03 20:05:49,684 INFO L125 PetriNetUnfolderBase]: For 544645/544649 co-relation queries the response was YES. [2024-06-03 20:05:49,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53683 conditions, 5579 events. 3568/5579 cut-off events. For 544645/544649 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 32712 event pairs, 662 based on Foata normal form. 10/5589 useless extension candidates. Maximal degree in co-relation 53527. Up to 4838 conditions per place. [2024-06-03 20:05:49,767 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 394 selfloop transitions, 123 changer transitions 0/521 dead transitions. [2024-06-03 20:05:49,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 521 transitions, 8766 flow [2024-06-03 20:05:49,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:05:49,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:05:49,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-03 20:05:49,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434589800443459 [2024-06-03 20:05:49,769 INFO L175 Difference]: Start difference. First operand has 333 places, 461 transitions, 6624 flow. Second operand 11 states and 200 transitions. [2024-06-03 20:05:49,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 521 transitions, 8766 flow [2024-06-03 20:05:51,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 521 transitions, 8647 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 20:05:51,961 INFO L231 Difference]: Finished difference. Result has 340 places, 489 transitions, 7439 flow [2024-06-03 20:05:51,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6505, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7439, PETRI_PLACES=340, PETRI_TRANSITIONS=489} [2024-06-03 20:05:51,961 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-03 20:05:51,962 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 489 transitions, 7439 flow [2024-06-03 20:05:51,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:51,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:51,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:51,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 20:05:51,962 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:51,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:51,963 INFO L85 PathProgramCache]: Analyzing trace with hash 2127832045, now seen corresponding path program 12 times [2024-06-03 20:05:51,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:51,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535145458] [2024-06-03 20:05:51,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:51,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:53,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:53,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535145458] [2024-06-03 20:05:53,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535145458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:53,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:53,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:53,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693994434] [2024-06-03 20:05:53,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:53,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:53,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:53,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:53,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:53,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:05:53,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 489 transitions, 7439 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:53,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:53,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:05:53,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:54,978 INFO L124 PetriNetUnfolderBase]: 3556/5563 cut-off events. [2024-06-03 20:05:54,978 INFO L125 PetriNetUnfolderBase]: For 540410/540414 co-relation queries the response was YES. [2024-06-03 20:05:55,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54146 conditions, 5563 events. 3556/5563 cut-off events. For 540410/540414 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 32650 event pairs, 665 based on Foata normal form. 8/5571 useless extension candidates. Maximal degree in co-relation 53987. Up to 5001 conditions per place. [2024-06-03 20:05:55,065 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 418 selfloop transitions, 97 changer transitions 0/519 dead transitions. [2024-06-03 20:05:55,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 519 transitions, 8832 flow [2024-06-03 20:05:55,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:05:55,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:05:55,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 20:05:55,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-03 20:05:55,066 INFO L175 Difference]: Start difference. First operand has 340 places, 489 transitions, 7439 flow. Second operand 9 states and 160 transitions. [2024-06-03 20:05:55,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 519 transitions, 8832 flow [2024-06-03 20:05:56,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 519 transitions, 8294 flow, removed 219 selfloop flow, removed 4 redundant places. [2024-06-03 20:05:56,853 INFO L231 Difference]: Finished difference. Result has 346 places, 496 transitions, 7401 flow [2024-06-03 20:05:56,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7049, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7401, PETRI_PLACES=346, PETRI_TRANSITIONS=496} [2024-06-03 20:05:56,854 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-03 20:05:56,854 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 496 transitions, 7401 flow [2024-06-03 20:05:56,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:56,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:05:56,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:05:56,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 20:05:56,855 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:05:56,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:05:56,855 INFO L85 PathProgramCache]: Analyzing trace with hash 2127832262, now seen corresponding path program 6 times [2024-06-03 20:05:56,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:05:56,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438797675] [2024-06-03 20:05:56,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:05:56,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:05:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:05:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:05:57,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:05:57,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438797675] [2024-06-03 20:05:57,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438797675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:05:57,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:05:57,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:05:57,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102769752] [2024-06-03 20:05:57,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:05:57,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:05:57,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:05:57,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:05:57,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:05:57,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:05:57,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 496 transitions, 7401 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:05:57,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:05:57,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:05:57,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:05:59,355 INFO L124 PetriNetUnfolderBase]: 3576/5585 cut-off events. [2024-06-03 20:05:59,355 INFO L125 PetriNetUnfolderBase]: For 536587/536591 co-relation queries the response was YES. [2024-06-03 20:05:59,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53712 conditions, 5585 events. 3576/5585 cut-off events. For 536587/536591 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 32707 event pairs, 663 based on Foata normal form. 8/5593 useless extension candidates. Maximal degree in co-relation 53551. Up to 5072 conditions per place. [2024-06-03 20:05:59,427 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 437 selfloop transitions, 82 changer transitions 0/523 dead transitions. [2024-06-03 20:05:59,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 523 transitions, 8671 flow [2024-06-03 20:05:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:05:59,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:05:59,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 20:05:59,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-03 20:05:59,428 INFO L175 Difference]: Start difference. First operand has 346 places, 496 transitions, 7401 flow. Second operand 9 states and 161 transitions. [2024-06-03 20:05:59,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 523 transitions, 8671 flow [2024-06-03 20:06:01,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 523 transitions, 8434 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-03 20:06:01,543 INFO L231 Difference]: Finished difference. Result has 350 places, 499 transitions, 7458 flow [2024-06-03 20:06:01,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7164, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7458, PETRI_PLACES=350, PETRI_TRANSITIONS=499} [2024-06-03 20:06:01,544 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-03 20:06:01,544 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 499 transitions, 7458 flow [2024-06-03 20:06:01,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:06:01,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:01,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:01,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 20:06:01,545 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:01,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:01,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1898374334, now seen corresponding path program 7 times [2024-06-03 20:06:01,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:01,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584003476] [2024-06-03 20:06:01,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:01,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:02,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:02,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584003476] [2024-06-03 20:06:02,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584003476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:02,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:02,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:02,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861774851] [2024-06-03 20:06:02,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:02,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:02,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:02,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:02,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:02,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:06:02,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 499 transitions, 7458 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:06:02,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:02,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:06:02,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:03,910 INFO L124 PetriNetUnfolderBase]: 3596/5615 cut-off events. [2024-06-03 20:06:03,910 INFO L125 PetriNetUnfolderBase]: For 552019/552023 co-relation queries the response was YES. [2024-06-03 20:06:03,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54341 conditions, 5615 events. 3596/5615 cut-off events. For 552019/552023 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 32973 event pairs, 669 based on Foata normal form. 8/5623 useless extension candidates. Maximal degree in co-relation 54180. Up to 5030 conditions per place. [2024-06-03 20:06:03,995 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 427 selfloop transitions, 95 changer transitions 0/526 dead transitions. [2024-06-03 20:06:03,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 526 transitions, 8740 flow [2024-06-03 20:06:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:06:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:06:03,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 20:06:03,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-03 20:06:03,999 INFO L175 Difference]: Start difference. First operand has 350 places, 499 transitions, 7458 flow. Second operand 9 states and 161 transitions. [2024-06-03 20:06:03,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 526 transitions, 8740 flow [2024-06-03 20:06:06,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 526 transitions, 8472 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:06,507 INFO L231 Difference]: Finished difference. Result has 353 places, 502 transitions, 7517 flow [2024-06-03 20:06:06,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7190, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7517, PETRI_PLACES=353, PETRI_TRANSITIONS=502} [2024-06-03 20:06:06,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-03 20:06:06,507 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 502 transitions, 7517 flow [2024-06-03 20:06:06,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:06:06,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:06,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:06,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 20:06:06,508 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:06,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:06,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1783083164, now seen corresponding path program 8 times [2024-06-03 20:06:06,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:06,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642153516] [2024-06-03 20:06:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:06,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:07,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:07,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642153516] [2024-06-03 20:06:07,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642153516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:07,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:07,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:07,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513754796] [2024-06-03 20:06:07,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:07,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:07,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:07,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:07,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:07,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:06:07,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 502 transitions, 7517 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:06:07,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:07,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:06:07,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:08,907 INFO L124 PetriNetUnfolderBase]: 3712/5783 cut-off events. [2024-06-03 20:06:08,907 INFO L125 PetriNetUnfolderBase]: For 624105/624109 co-relation queries the response was YES. [2024-06-03 20:06:08,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58325 conditions, 5783 events. 3712/5783 cut-off events. For 624105/624109 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 33999 event pairs, 585 based on Foata normal form. 8/5791 useless extension candidates. Maximal degree in co-relation 58163. Up to 4566 conditions per place. [2024-06-03 20:06:08,996 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 350 selfloop transitions, 190 changer transitions 0/544 dead transitions. [2024-06-03 20:06:08,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 544 transitions, 9710 flow [2024-06-03 20:06:08,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:06:08,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:06:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 20:06:08,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-03 20:06:08,998 INFO L175 Difference]: Start difference. First operand has 353 places, 502 transitions, 7517 flow. Second operand 9 states and 169 transitions. [2024-06-03 20:06:08,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 544 transitions, 9710 flow [2024-06-03 20:06:11,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 544 transitions, 9445 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:11,763 INFO L231 Difference]: Finished difference. Result has 356 places, 514 transitions, 8203 flow [2024-06-03 20:06:11,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7252, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8203, PETRI_PLACES=356, PETRI_TRANSITIONS=514} [2024-06-03 20:06:11,764 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-03 20:06:11,764 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 514 transitions, 8203 flow [2024-06-03 20:06:11,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:06:11,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:11,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:11,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 20:06:11,765 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:11,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:11,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1783350291, now seen corresponding path program 13 times [2024-06-03 20:06:11,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:11,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962135683] [2024-06-03 20:06:11,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:11,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:13,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:13,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962135683] [2024-06-03 20:06:13,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962135683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:13,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:13,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:13,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381563054] [2024-06-03 20:06:13,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:13,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:13,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:13,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:13,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:13,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:06:13,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 514 transitions, 8203 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:06:13,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:13,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:06:13,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:14,657 INFO L124 PetriNetUnfolderBase]: 3738/5825 cut-off events. [2024-06-03 20:06:14,658 INFO L125 PetriNetUnfolderBase]: For 650492/650496 co-relation queries the response was YES. [2024-06-03 20:06:14,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60067 conditions, 5825 events. 3738/5825 cut-off events. For 650492/650496 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 34356 event pairs, 594 based on Foata normal form. 6/5831 useless extension candidates. Maximal degree in co-relation 59904. Up to 5032 conditions per place. [2024-06-03 20:06:14,752 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 393 selfloop transitions, 152 changer transitions 0/549 dead transitions. [2024-06-03 20:06:14,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 549 transitions, 9940 flow [2024-06-03 20:06:14,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:06:14,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:06:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 20:06:14,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-03 20:06:14,753 INFO L175 Difference]: Start difference. First operand has 356 places, 514 transitions, 8203 flow. Second operand 9 states and 160 transitions. [2024-06-03 20:06:14,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 549 transitions, 9940 flow [2024-06-03 20:06:17,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 549 transitions, 9628 flow, removed 123 selfloop flow, removed 3 redundant places. [2024-06-03 20:06:17,496 INFO L231 Difference]: Finished difference. Result has 363 places, 524 transitions, 8593 flow [2024-06-03 20:06:17,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7891, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8593, PETRI_PLACES=363, PETRI_TRANSITIONS=524} [2024-06-03 20:06:17,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-03 20:06:17,497 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 524 transitions, 8593 flow [2024-06-03 20:06:17,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:06:17,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:17,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:17,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 20:06:17,498 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:17,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:17,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1783350074, now seen corresponding path program 9 times [2024-06-03 20:06:17,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:17,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126918195] [2024-06-03 20:06:17,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:17,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:18,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:18,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126918195] [2024-06-03 20:06:18,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126918195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:18,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:18,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:18,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744953261] [2024-06-03 20:06:18,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:18,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:18,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:18,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:18,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:18,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:06:18,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 524 transitions, 8593 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:06:18,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:18,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:06:18,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:19,899 INFO L124 PetriNetUnfolderBase]: 3742/5831 cut-off events. [2024-06-03 20:06:19,900 INFO L125 PetriNetUnfolderBase]: For 653211/653215 co-relation queries the response was YES. [2024-06-03 20:06:19,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60054 conditions, 5831 events. 3742/5831 cut-off events. For 653211/653215 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34279 event pairs, 601 based on Foata normal form. 8/5839 useless extension candidates. Maximal degree in co-relation 59888. Up to 4609 conditions per place. [2024-06-03 20:06:19,999 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 361 selfloop transitions, 192 changer transitions 0/557 dead transitions. [2024-06-03 20:06:19,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 557 transitions, 10360 flow [2024-06-03 20:06:20,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:06:20,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:06:20,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 20:06:20,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-03 20:06:20,001 INFO L175 Difference]: Start difference. First operand has 363 places, 524 transitions, 8593 flow. Second operand 9 states and 168 transitions. [2024-06-03 20:06:20,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 557 transitions, 10360 flow [2024-06-03 20:06:22,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 557 transitions, 10131 flow, removed 81 selfloop flow, removed 4 redundant places. [2024-06-03 20:06:22,705 INFO L231 Difference]: Finished difference. Result has 368 places, 527 transitions, 8848 flow [2024-06-03 20:06:22,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8364, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8848, PETRI_PLACES=368, PETRI_TRANSITIONS=527} [2024-06-03 20:06:22,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-03 20:06:22,706 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 527 transitions, 8848 flow [2024-06-03 20:06:22,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:06:22,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:22,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:22,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 20:06:22,706 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:22,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:22,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1617703500, now seen corresponding path program 10 times [2024-06-03 20:06:22,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:22,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542666030] [2024-06-03 20:06:22,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:22,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:23,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:23,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542666030] [2024-06-03 20:06:23,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542666030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:23,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:23,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:23,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249218108] [2024-06-03 20:06:23,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:23,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:23,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:23,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:23,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:23,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:06:23,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 527 transitions, 8848 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:06:23,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:23,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:06:23,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:25,315 INFO L124 PetriNetUnfolderBase]: 3784/5889 cut-off events. [2024-06-03 20:06:25,315 INFO L125 PetriNetUnfolderBase]: For 677494/677498 co-relation queries the response was YES. [2024-06-03 20:06:25,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61939 conditions, 5889 events. 3784/5889 cut-off events. For 677494/677498 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 34657 event pairs, 628 based on Foata normal form. 6/5895 useless extension candidates. Maximal degree in co-relation 61771. Up to 5354 conditions per place. [2024-06-03 20:06:25,413 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 453 selfloop transitions, 100 changer transitions 0/557 dead transitions. [2024-06-03 20:06:25,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 557 transitions, 10565 flow [2024-06-03 20:06:25,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:06:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:06:25,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 20:06:25,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-03 20:06:25,424 INFO L175 Difference]: Start difference. First operand has 368 places, 527 transitions, 8848 flow. Second operand 9 states and 158 transitions. [2024-06-03 20:06:25,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 557 transitions, 10565 flow [2024-06-03 20:06:28,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 557 transitions, 10267 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-03 20:06:28,337 INFO L231 Difference]: Finished difference. Result has 373 places, 534 transitions, 9075 flow [2024-06-03 20:06:28,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8555, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9075, PETRI_PLACES=373, PETRI_TRANSITIONS=534} [2024-06-03 20:06:28,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-03 20:06:28,360 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 534 transitions, 9075 flow [2024-06-03 20:06:28,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:06:28,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:28,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:28,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 20:06:28,361 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:28,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:28,361 INFO L85 PathProgramCache]: Analyzing trace with hash -428746725, now seen corresponding path program 14 times [2024-06-03 20:06:28,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:28,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901610850] [2024-06-03 20:06:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:28,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:29,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:29,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901610850] [2024-06-03 20:06:29,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901610850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:29,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:29,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:29,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641686742] [2024-06-03 20:06:29,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:29,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:29,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:29,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:29,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:29,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:06:29,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 534 transitions, 9075 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:06:29,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:29,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:06:29,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:31,162 INFO L124 PetriNetUnfolderBase]: 3810/5933 cut-off events. [2024-06-03 20:06:31,162 INFO L125 PetriNetUnfolderBase]: For 702294/702298 co-relation queries the response was YES. [2024-06-03 20:06:31,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62715 conditions, 5933 events. 3810/5933 cut-off events. For 702294/702298 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 35026 event pairs, 628 based on Foata normal form. 6/5939 useless extension candidates. Maximal degree in co-relation 62545. Up to 5429 conditions per place. [2024-06-03 20:06:31,263 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 466 selfloop transitions, 93 changer transitions 0/563 dead transitions. [2024-06-03 20:06:31,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 563 transitions, 10814 flow [2024-06-03 20:06:31,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:06:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:06:31,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 20:06:31,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-03 20:06:31,264 INFO L175 Difference]: Start difference. First operand has 373 places, 534 transitions, 9075 flow. Second operand 9 states and 156 transitions. [2024-06-03 20:06:31,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 563 transitions, 10814 flow [2024-06-03 20:06:34,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 563 transitions, 10575 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-03 20:06:34,755 INFO L231 Difference]: Finished difference. Result has 377 places, 540 transitions, 9334 flow [2024-06-03 20:06:34,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8836, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9334, PETRI_PLACES=377, PETRI_TRANSITIONS=540} [2024-06-03 20:06:34,756 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-03 20:06:34,756 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 540 transitions, 9334 flow [2024-06-03 20:06:34,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:06:34,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:34,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:34,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 20:06:34,757 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:34,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:34,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1625055646, now seen corresponding path program 6 times [2024-06-03 20:06:34,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:34,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809545693] [2024-06-03 20:06:34,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:34,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:35,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:35,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809545693] [2024-06-03 20:06:35,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809545693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:35,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:35,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:35,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359000176] [2024-06-03 20:06:35,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:35,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:35,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:35,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:35,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:35,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:06:35,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 540 transitions, 9334 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:06:35,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:35,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:06:35,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:37,445 INFO L124 PetriNetUnfolderBase]: 3854/5997 cut-off events. [2024-06-03 20:06:37,445 INFO L125 PetriNetUnfolderBase]: For 758980/758980 co-relation queries the response was YES. [2024-06-03 20:06:37,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63878 conditions, 5997 events. 3854/5997 cut-off events. For 758980/758980 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35384 event pairs, 627 based on Foata normal form. 12/6008 useless extension candidates. Maximal degree in co-relation 63706. Up to 5488 conditions per place. [2024-06-03 20:06:37,566 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 479 selfloop transitions, 84 changer transitions 0/567 dead transitions. [2024-06-03 20:06:37,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 567 transitions, 10827 flow [2024-06-03 20:06:37,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:06:37,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:06:37,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 20:06:37,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 20:06:37,567 INFO L175 Difference]: Start difference. First operand has 377 places, 540 transitions, 9334 flow. Second operand 8 states and 144 transitions. [2024-06-03 20:06:37,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 567 transitions, 10827 flow [2024-06-03 20:06:41,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 567 transitions, 10594 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-03 20:06:41,086 INFO L231 Difference]: Finished difference. Result has 380 places, 541 transitions, 9320 flow [2024-06-03 20:06:41,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9101, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9320, PETRI_PLACES=380, PETRI_TRANSITIONS=541} [2024-06-03 20:06:41,086 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-03 20:06:41,086 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 541 transitions, 9320 flow [2024-06-03 20:06:41,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:06:41,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:41,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:41,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 20:06:41,087 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:41,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:41,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1617710940, now seen corresponding path program 11 times [2024-06-03 20:06:41,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:41,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303214428] [2024-06-03 20:06:41,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:41,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:42,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:42,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303214428] [2024-06-03 20:06:42,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303214428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:42,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:42,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:42,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53797136] [2024-06-03 20:06:42,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:42,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:42,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:42,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:42,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:42,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:06:42,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 541 transitions, 9320 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:06:42,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:42,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:06:42,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:43,756 INFO L124 PetriNetUnfolderBase]: 3922/6095 cut-off events. [2024-06-03 20:06:43,756 INFO L125 PetriNetUnfolderBase]: For 771698/771702 co-relation queries the response was YES. [2024-06-03 20:06:43,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66056 conditions, 6095 events. 3922/6095 cut-off events. For 771698/771702 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 36059 event pairs, 634 based on Foata normal form. 8/6103 useless extension candidates. Maximal degree in co-relation 65882. Up to 5475 conditions per place. [2024-06-03 20:06:43,858 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 466 selfloop transitions, 108 changer transitions 0/578 dead transitions. [2024-06-03 20:06:43,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 578 transitions, 11508 flow [2024-06-03 20:06:43,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:06:43,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:06:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 20:06:43,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 20:06:43,859 INFO L175 Difference]: Start difference. First operand has 380 places, 541 transitions, 9320 flow. Second operand 9 states and 162 transitions. [2024-06-03 20:06:43,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 578 transitions, 11508 flow [2024-06-03 20:06:47,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 578 transitions, 11321 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 20:06:47,188 INFO L231 Difference]: Finished difference. Result has 384 places, 553 transitions, 9909 flow [2024-06-03 20:06:47,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9133, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9909, PETRI_PLACES=384, PETRI_TRANSITIONS=553} [2024-06-03 20:06:47,192 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-03 20:06:47,192 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 553 transitions, 9909 flow [2024-06-03 20:06:47,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:06:47,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:47,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:47,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 20:06:47,193 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:47,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:47,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1625062807, now seen corresponding path program 15 times [2024-06-03 20:06:47,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:47,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460813155] [2024-06-03 20:06:47,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:47,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:48,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:48,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460813155] [2024-06-03 20:06:48,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460813155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:48,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:48,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:48,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153100549] [2024-06-03 20:06:48,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:48,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:48,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:48,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:48,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:48,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:06:48,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 553 transitions, 9909 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:06:48,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:48,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:06:48,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:50,175 INFO L124 PetriNetUnfolderBase]: 3916/6087 cut-off events. [2024-06-03 20:06:50,176 INFO L125 PetriNetUnfolderBase]: For 765282/765286 co-relation queries the response was YES. [2024-06-03 20:06:50,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65906 conditions, 6087 events. 3916/6087 cut-off events. For 765282/765286 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 36006 event pairs, 630 based on Foata normal form. 6/6093 useless extension candidates. Maximal degree in co-relation 65730. Up to 5658 conditions per place. [2024-06-03 20:06:50,275 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 498 selfloop transitions, 74 changer transitions 0/576 dead transitions. [2024-06-03 20:06:50,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 576 transitions, 11212 flow [2024-06-03 20:06:50,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:06:50,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:06:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 20:06:50,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-03 20:06:50,276 INFO L175 Difference]: Start difference. First operand has 384 places, 553 transitions, 9909 flow. Second operand 9 states and 155 transitions. [2024-06-03 20:06:50,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 576 transitions, 11212 flow [2024-06-03 20:06:53,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 576 transitions, 10865 flow, removed 132 selfloop flow, removed 4 redundant places. [2024-06-03 20:06:53,672 INFO L231 Difference]: Finished difference. Result has 389 places, 553 transitions, 9716 flow [2024-06-03 20:06:53,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9562, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9716, PETRI_PLACES=389, PETRI_TRANSITIONS=553} [2024-06-03 20:06:53,673 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-03 20:06:53,673 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 553 transitions, 9716 flow [2024-06-03 20:06:53,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:06:53,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:06:53,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:06:53,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 20:06:53,673 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:06:53,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:06:53,674 INFO L85 PathProgramCache]: Analyzing trace with hash -436098158, now seen corresponding path program 12 times [2024-06-03 20:06:53,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:06:53,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517807384] [2024-06-03 20:06:53,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:06:53,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:06:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:06:54,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:06:54,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:06:54,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517807384] [2024-06-03 20:06:54,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517807384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:06:54,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:06:54,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:06:54,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112266946] [2024-06-03 20:06:54,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:06:54,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:06:54,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:06:54,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:06:54,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:06:54,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:06:54,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 553 transitions, 9716 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:06:54,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:06:54,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:06:54,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:06:56,428 INFO L124 PetriNetUnfolderBase]: 3924/6099 cut-off events. [2024-06-03 20:06:56,428 INFO L125 PetriNetUnfolderBase]: For 781814/781818 co-relation queries the response was YES. [2024-06-03 20:06:56,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65732 conditions, 6099 events. 3924/6099 cut-off events. For 781814/781818 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 36141 event pairs, 630 based on Foata normal form. 12/6111 useless extension candidates. Maximal degree in co-relation 65554. Up to 5646 conditions per place. [2024-06-03 20:06:56,528 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 499 selfloop transitions, 78 changer transitions 0/581 dead transitions. [2024-06-03 20:06:56,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 581 transitions, 11234 flow [2024-06-03 20:06:56,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:06:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:06:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 20:06:56,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-03 20:06:56,529 INFO L175 Difference]: Start difference. First operand has 389 places, 553 transitions, 9716 flow. Second operand 9 states and 157 transitions. [2024-06-03 20:06:56,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 581 transitions, 11234 flow [2024-06-03 20:07:00,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 581 transitions, 10906 flow, removed 79 selfloop flow, removed 8 redundant places. [2024-06-03 20:07:00,685 INFO L231 Difference]: Finished difference. Result has 390 places, 557 transitions, 9758 flow [2024-06-03 20:07:00,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9398, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9758, PETRI_PLACES=390, PETRI_TRANSITIONS=557} [2024-06-03 20:07:00,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-03 20:07:00,686 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 557 transitions, 9758 flow [2024-06-03 20:07:00,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:07:00,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:00,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:00,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 20:07:00,686 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:00,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:00,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1610770846, now seen corresponding path program 7 times [2024-06-03 20:07:00,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:00,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307387372] [2024-06-03 20:07:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:00,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:01,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:01,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307387372] [2024-06-03 20:07:01,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307387372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:01,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:01,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:01,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302055354] [2024-06-03 20:07:01,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:01,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:01,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:01,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:01,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:01,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:07:01,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 557 transitions, 9758 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:07:01,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:01,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:07:01,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:03,488 INFO L124 PetriNetUnfolderBase]: 3952/6143 cut-off events. [2024-06-03 20:07:03,488 INFO L125 PetriNetUnfolderBase]: For 794830/794830 co-relation queries the response was YES. [2024-06-03 20:07:03,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66259 conditions, 6143 events. 3952/6143 cut-off events. For 794830/794830 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 36350 event pairs, 629 based on Foata normal form. 8/6150 useless extension candidates. Maximal degree in co-relation 66080. Up to 5482 conditions per place. [2024-06-03 20:07:03,585 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 494 selfloop transitions, 88 changer transitions 0/586 dead transitions. [2024-06-03 20:07:03,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 586 transitions, 11375 flow [2024-06-03 20:07:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:03,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 20:07:03,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-03 20:07:03,587 INFO L175 Difference]: Start difference. First operand has 390 places, 557 transitions, 9758 flow. Second operand 8 states and 145 transitions. [2024-06-03 20:07:03,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 586 transitions, 11375 flow [2024-06-03 20:07:07,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 586 transitions, 11087 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-03 20:07:07,711 INFO L231 Difference]: Finished difference. Result has 391 places, 558 transitions, 9698 flow [2024-06-03 20:07:07,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9470, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9698, PETRI_PLACES=391, PETRI_TRANSITIONS=558} [2024-06-03 20:07:07,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-03 20:07:07,715 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 558 transitions, 9698 flow [2024-06-03 20:07:07,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:07:07,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:07,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:07,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 20:07:07,716 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:07,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:07,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1618427256, now seen corresponding path program 1 times [2024-06-03 20:07:07,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:07,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618861095] [2024-06-03 20:07:07,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:07,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:08,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:08,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618861095] [2024-06-03 20:07:08,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618861095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:08,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:08,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:08,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117973657] [2024-06-03 20:07:08,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:08,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:08,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:08,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:08,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:08,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:07:08,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 558 transitions, 9698 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:07:08,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:08,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:07:08,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:10,484 INFO L124 PetriNetUnfolderBase]: 3949/6135 cut-off events. [2024-06-03 20:07:10,484 INFO L125 PetriNetUnfolderBase]: For 772594/772594 co-relation queries the response was YES. [2024-06-03 20:07:10,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66036 conditions, 6135 events. 3949/6135 cut-off events. For 772594/772594 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 36310 event pairs, 758 based on Foata normal form. 1/6135 useless extension candidates. Maximal degree in co-relation 65856. Up to 5861 conditions per place. [2024-06-03 20:07:10,583 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 529 selfloop transitions, 40 changer transitions 0/573 dead transitions. [2024-06-03 20:07:10,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 573 transitions, 11050 flow [2024-06-03 20:07:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:10,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:07:10,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-03 20:07:10,584 INFO L175 Difference]: Start difference. First operand has 391 places, 558 transitions, 9698 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:07:10,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 573 transitions, 11050 flow [2024-06-03 20:07:14,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 573 transitions, 10848 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 20:07:14,948 INFO L231 Difference]: Finished difference. Result has 393 places, 561 transitions, 9762 flow [2024-06-03 20:07:14,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9496, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9762, PETRI_PLACES=393, PETRI_TRANSITIONS=561} [2024-06-03 20:07:14,959 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-03 20:07:14,959 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 561 transitions, 9762 flow [2024-06-03 20:07:14,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:07:14,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:14,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:14,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 20:07:14,961 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:14,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:14,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1995151382, now seen corresponding path program 8 times [2024-06-03 20:07:14,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:14,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225649234] [2024-06-03 20:07:14,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:14,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:15,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:15,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225649234] [2024-06-03 20:07:15,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225649234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:15,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:15,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:15,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101031945] [2024-06-03 20:07:15,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:15,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:15,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:15,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:15,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:15,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:07:15,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 561 transitions, 9762 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:07:15,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:15,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:07:15,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:17,747 INFO L124 PetriNetUnfolderBase]: 3977/6187 cut-off events. [2024-06-03 20:07:17,747 INFO L125 PetriNetUnfolderBase]: For 819215/819219 co-relation queries the response was YES. [2024-06-03 20:07:17,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66687 conditions, 6187 events. 3977/6187 cut-off events. For 819215/819219 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 36738 event pairs, 751 based on Foata normal form. 12/6199 useless extension candidates. Maximal degree in co-relation 66506. Up to 5915 conditions per place. [2024-06-03 20:07:17,846 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 548 selfloop transitions, 28 changer transitions 0/580 dead transitions. [2024-06-03 20:07:17,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 580 transitions, 11178 flow [2024-06-03 20:07:17,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:17,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:17,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 20:07:17,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-03 20:07:17,847 INFO L175 Difference]: Start difference. First operand has 393 places, 561 transitions, 9762 flow. Second operand 8 states and 131 transitions. [2024-06-03 20:07:17,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 580 transitions, 11178 flow [2024-06-03 20:07:22,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 580 transitions, 10939 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-03 20:07:22,094 INFO L231 Difference]: Finished difference. Result has 396 places, 564 transitions, 9704 flow [2024-06-03 20:07:22,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9523, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9704, PETRI_PLACES=396, PETRI_TRANSITIONS=564} [2024-06-03 20:07:22,095 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 354 predicate places. [2024-06-03 20:07:22,095 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 564 transitions, 9704 flow [2024-06-03 20:07:22,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:07:22,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:22,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:22,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 20:07:22,096 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:22,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:22,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1843119884, now seen corresponding path program 9 times [2024-06-03 20:07:22,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:22,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306398030] [2024-06-03 20:07:22,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:22,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:22,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:22,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306398030] [2024-06-03 20:07:22,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306398030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:22,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:22,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:22,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732388303] [2024-06-03 20:07:22,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:22,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:22,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:22,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:22,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:23,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:07:23,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 564 transitions, 9704 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:07:23,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:23,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:07:23,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:24,768 INFO L124 PetriNetUnfolderBase]: 4005/6237 cut-off events. [2024-06-03 20:07:24,768 INFO L125 PetriNetUnfolderBase]: For 841003/841007 co-relation queries the response was YES. [2024-06-03 20:07:24,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67540 conditions, 6237 events. 4005/6237 cut-off events. For 841003/841007 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37145 event pairs, 724 based on Foata normal form. 12/6249 useless extension candidates. Maximal degree in co-relation 67357. Up to 5939 conditions per place. [2024-06-03 20:07:24,870 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 548 selfloop transitions, 32 changer transitions 0/584 dead transitions. [2024-06-03 20:07:24,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 584 transitions, 11136 flow [2024-06-03 20:07:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:24,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:24,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 20:07:24,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-03 20:07:24,871 INFO L175 Difference]: Start difference. First operand has 396 places, 564 transitions, 9704 flow. Second operand 8 states and 131 transitions. [2024-06-03 20:07:24,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 584 transitions, 11136 flow [2024-06-03 20:07:29,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 584 transitions, 10999 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-03 20:07:29,949 INFO L231 Difference]: Finished difference. Result has 400 places, 567 transitions, 9760 flow [2024-06-03 20:07:29,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9567, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9760, PETRI_PLACES=400, PETRI_TRANSITIONS=567} [2024-06-03 20:07:29,949 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-03 20:07:29,949 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 567 transitions, 9760 flow [2024-06-03 20:07:29,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:07:29,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:29,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:29,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 20:07:29,951 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:29,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:29,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1837405964, now seen corresponding path program 10 times [2024-06-03 20:07:29,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:29,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594995137] [2024-06-03 20:07:29,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:29,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:30,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:30,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594995137] [2024-06-03 20:07:30,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594995137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:30,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:30,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:30,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578085932] [2024-06-03 20:07:30,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:30,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:30,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:30,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:30,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:30,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:07:30,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 567 transitions, 9760 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:07:30,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:30,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:07:30,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:32,681 INFO L124 PetriNetUnfolderBase]: 4033/6287 cut-off events. [2024-06-03 20:07:32,682 INFO L125 PetriNetUnfolderBase]: For 860415/860419 co-relation queries the response was YES. [2024-06-03 20:07:32,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68248 conditions, 6287 events. 4033/6287 cut-off events. For 860415/860419 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 37545 event pairs, 727 based on Foata normal form. 12/6299 useless extension candidates. Maximal degree in co-relation 68063. Up to 5879 conditions per place. [2024-06-03 20:07:32,779 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 548 selfloop transitions, 36 changer transitions 0/588 dead transitions. [2024-06-03 20:07:32,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 588 transitions, 11260 flow [2024-06-03 20:07:32,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:32,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:32,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 20:07:32,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-03 20:07:32,780 INFO L175 Difference]: Start difference. First operand has 400 places, 567 transitions, 9760 flow. Second operand 8 states and 134 transitions. [2024-06-03 20:07:32,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 588 transitions, 11260 flow [2024-06-03 20:07:36,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 588 transitions, 11111 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-03 20:07:36,798 INFO L231 Difference]: Finished difference. Result has 403 places, 568 transitions, 9743 flow [2024-06-03 20:07:36,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9611, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9743, PETRI_PLACES=403, PETRI_TRANSITIONS=568} [2024-06-03 20:07:36,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-03 20:07:36,798 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 568 transitions, 9743 flow [2024-06-03 20:07:36,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:07:36,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:36,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:36,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 20:07:36,799 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:36,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:36,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1994854712, now seen corresponding path program 11 times [2024-06-03 20:07:36,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:36,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580295204] [2024-06-03 20:07:36,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:36,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:37,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:37,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580295204] [2024-06-03 20:07:37,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580295204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:37,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:37,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:37,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160917745] [2024-06-03 20:07:37,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:37,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:37,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:37,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:37,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:37,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:07:37,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 568 transitions, 9743 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:07:37,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:37,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:07:37,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:39,564 INFO L124 PetriNetUnfolderBase]: 4077/6351 cut-off events. [2024-06-03 20:07:39,565 INFO L125 PetriNetUnfolderBase]: For 902692/902696 co-relation queries the response was YES. [2024-06-03 20:07:39,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69266 conditions, 6351 events. 4077/6351 cut-off events. For 902692/902696 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 37992 event pairs, 773 based on Foata normal form. 16/6367 useless extension candidates. Maximal degree in co-relation 69080. Up to 6031 conditions per place. [2024-06-03 20:07:39,665 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 553 selfloop transitions, 32 changer transitions 0/589 dead transitions. [2024-06-03 20:07:39,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 589 transitions, 11287 flow [2024-06-03 20:07:39,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:39,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:39,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 20:07:39,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-03 20:07:39,667 INFO L175 Difference]: Start difference. First operand has 403 places, 568 transitions, 9743 flow. Second operand 8 states and 135 transitions. [2024-06-03 20:07:39,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 589 transitions, 11287 flow [2024-06-03 20:07:43,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 589 transitions, 11183 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:07:43,928 INFO L231 Difference]: Finished difference. Result has 405 places, 569 transitions, 9768 flow [2024-06-03 20:07:43,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9639, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9768, PETRI_PLACES=405, PETRI_TRANSITIONS=569} [2024-06-03 20:07:43,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 363 predicate places. [2024-06-03 20:07:43,929 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 569 transitions, 9768 flow [2024-06-03 20:07:43,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:07:43,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:43,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:43,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 20:07:43,930 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:43,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:43,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1484562282, now seen corresponding path program 12 times [2024-06-03 20:07:43,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:43,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141316705] [2024-06-03 20:07:43,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:43,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:44,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:44,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141316705] [2024-06-03 20:07:44,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141316705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:44,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:44,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:44,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422059601] [2024-06-03 20:07:44,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:44,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:44,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:44,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:44,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:44,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:07:44,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 569 transitions, 9768 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:07:44,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:44,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:07:44,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:46,819 INFO L124 PetriNetUnfolderBase]: 4121/6419 cut-off events. [2024-06-03 20:07:46,820 INFO L125 PetriNetUnfolderBase]: For 928325/928325 co-relation queries the response was YES. [2024-06-03 20:07:46,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70318 conditions, 6419 events. 4121/6419 cut-off events. For 928325/928325 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 38508 event pairs, 770 based on Foata normal form. 12/6430 useless extension candidates. Maximal degree in co-relation 70131. Up to 6045 conditions per place. [2024-06-03 20:07:46,918 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 544 selfloop transitions, 44 changer transitions 0/592 dead transitions. [2024-06-03 20:07:46,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 592 transitions, 11309 flow [2024-06-03 20:07:46,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:46,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:46,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 20:07:46,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-03 20:07:46,919 INFO L175 Difference]: Start difference. First operand has 405 places, 569 transitions, 9768 flow. Second operand 8 states and 138 transitions. [2024-06-03 20:07:46,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 592 transitions, 11309 flow [2024-06-03 20:07:51,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 592 transitions, 11218 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 20:07:51,932 INFO L231 Difference]: Finished difference. Result has 407 places, 570 transitions, 9830 flow [2024-06-03 20:07:51,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9677, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9830, PETRI_PLACES=407, PETRI_TRANSITIONS=570} [2024-06-03 20:07:51,932 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-03 20:07:51,932 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 570 transitions, 9830 flow [2024-06-03 20:07:51,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:07:51,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:51,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:51,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 20:07:51,933 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:51,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:51,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1325587450, now seen corresponding path program 1 times [2024-06-03 20:07:51,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:51,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531256741] [2024-06-03 20:07:51,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:51,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:07:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:07:52,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:07:52,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531256741] [2024-06-03 20:07:52,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531256741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:07:52,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:07:52,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:07:52,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96781620] [2024-06-03 20:07:52,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:07:52,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:07:52,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:07:52,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:07:52,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:07:52,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:07:52,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 570 transitions, 9830 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:07:52,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:07:52,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:07:52,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:07:54,831 INFO L124 PetriNetUnfolderBase]: 4131/6431 cut-off events. [2024-06-03 20:07:54,832 INFO L125 PetriNetUnfolderBase]: For 889647/889651 co-relation queries the response was YES. [2024-06-03 20:07:54,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70521 conditions, 6431 events. 4131/6431 cut-off events. For 889647/889651 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 38598 event pairs, 775 based on Foata normal form. 6/6437 useless extension candidates. Maximal degree in co-relation 70333. Up to 6149 conditions per place. [2024-06-03 20:07:54,943 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 546 selfloop transitions, 39 changer transitions 0/589 dead transitions. [2024-06-03 20:07:54,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 589 transitions, 11354 flow [2024-06-03 20:07:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:07:54,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:07:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:07:54,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-03 20:07:54,945 INFO L175 Difference]: Start difference. First operand has 407 places, 570 transitions, 9830 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:07:54,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 589 transitions, 11354 flow [2024-06-03 20:07:59,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 589 transitions, 11235 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:07:59,421 INFO L231 Difference]: Finished difference. Result has 409 places, 574 transitions, 10031 flow [2024-06-03 20:07:59,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9711, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10031, PETRI_PLACES=409, PETRI_TRANSITIONS=574} [2024-06-03 20:07:59,422 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-03 20:07:59,422 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 574 transitions, 10031 flow [2024-06-03 20:07:59,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:07:59,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:07:59,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:07:59,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 20:07:59,423 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:07:59,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:07:59,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2122981312, now seen corresponding path program 2 times [2024-06-03 20:07:59,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:07:59,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057334763] [2024-06-03 20:07:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:07:59,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:07:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:00,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:00,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057334763] [2024-06-03 20:08:00,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057334763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:00,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:00,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:08:00,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348143784] [2024-06-03 20:08:00,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:00,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:08:00,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:00,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:08:00,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:08:00,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:08:00,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 574 transitions, 10031 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:08:00,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:00,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:08:00,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:02,266 INFO L124 PetriNetUnfolderBase]: 4141/6445 cut-off events. [2024-06-03 20:08:02,267 INFO L125 PetriNetUnfolderBase]: For 908823/908827 co-relation queries the response was YES. [2024-06-03 20:08:02,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71084 conditions, 6445 events. 4141/6445 cut-off events. For 908823/908827 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 38654 event pairs, 759 based on Foata normal form. 6/6451 useless extension candidates. Maximal degree in co-relation 70895. Up to 6112 conditions per place. [2024-06-03 20:08:02,378 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 533 selfloop transitions, 59 changer transitions 0/596 dead transitions. [2024-06-03 20:08:02,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 596 transitions, 11669 flow [2024-06-03 20:08:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:02,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:02,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 20:08:02,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-03 20:08:02,380 INFO L175 Difference]: Start difference. First operand has 409 places, 574 transitions, 10031 flow. Second operand 8 states and 135 transitions. [2024-06-03 20:08:02,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 596 transitions, 11669 flow [2024-06-03 20:08:06,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 596 transitions, 11404 flow, removed 96 selfloop flow, removed 7 redundant places. [2024-06-03 20:08:06,911 INFO L231 Difference]: Finished difference. Result has 410 places, 578 transitions, 10134 flow [2024-06-03 20:08:06,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9766, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10134, PETRI_PLACES=410, PETRI_TRANSITIONS=578} [2024-06-03 20:08:06,912 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-03 20:08:06,912 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 578 transitions, 10134 flow [2024-06-03 20:08:06,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:08:06,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:06,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:06,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 20:08:06,925 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:06,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:06,926 INFO L85 PathProgramCache]: Analyzing trace with hash 113725026, now seen corresponding path program 13 times [2024-06-03 20:08:06,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:06,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539117095] [2024-06-03 20:08:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:06,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:07,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:07,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539117095] [2024-06-03 20:08:07,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539117095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:07,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:07,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:08:07,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077652710] [2024-06-03 20:08:07,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:07,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:08:07,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:07,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:08:07,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:08:07,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:08:07,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 578 transitions, 10134 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:08:07,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:07,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:08:07,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:09,862 INFO L124 PetriNetUnfolderBase]: 4264/6644 cut-off events. [2024-06-03 20:08:09,863 INFO L125 PetriNetUnfolderBase]: For 1017707/1017707 co-relation queries the response was YES. [2024-06-03 20:08:09,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75414 conditions, 6644 events. 4264/6644 cut-off events. For 1017707/1017707 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 40148 event pairs, 787 based on Foata normal form. 8/6651 useless extension candidates. Maximal degree in co-relation 75225. Up to 6013 conditions per place. [2024-06-03 20:08:09,979 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 552 selfloop transitions, 50 changer transitions 0/606 dead transitions. [2024-06-03 20:08:09,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 606 transitions, 12109 flow [2024-06-03 20:08:09,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:09,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:09,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 20:08:09,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-03 20:08:09,980 INFO L175 Difference]: Start difference. First operand has 410 places, 578 transitions, 10134 flow. Second operand 8 states and 140 transitions. [2024-06-03 20:08:09,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 606 transitions, 12109 flow [2024-06-03 20:08:15,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 606 transitions, 11794 flow, removed 101 selfloop flow, removed 7 redundant places. [2024-06-03 20:08:15,067 INFO L231 Difference]: Finished difference. Result has 412 places, 581 transitions, 10094 flow [2024-06-03 20:08:15,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9821, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10094, PETRI_PLACES=412, PETRI_TRANSITIONS=581} [2024-06-03 20:08:15,067 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-03 20:08:15,067 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 581 transitions, 10094 flow [2024-06-03 20:08:15,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:08:15,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:15,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:15,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 20:08:15,068 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:15,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:15,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1600328729, now seen corresponding path program 16 times [2024-06-03 20:08:15,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:15,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836330701] [2024-06-03 20:08:15,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:15,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:15,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:16,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:16,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836330701] [2024-06-03 20:08:16,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836330701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:16,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:16,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:08:16,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328470919] [2024-06-03 20:08:16,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:16,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:08:16,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:16,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:08:16,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:08:16,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:08:16,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 581 transitions, 10094 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:08:16,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:16,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:08:16,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:18,039 INFO L124 PetriNetUnfolderBase]: 4266/6641 cut-off events. [2024-06-03 20:08:18,039 INFO L125 PetriNetUnfolderBase]: For 986514/986514 co-relation queries the response was YES. [2024-06-03 20:08:18,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75421 conditions, 6641 events. 4266/6641 cut-off events. For 986514/986514 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 40102 event pairs, 831 based on Foata normal form. 2/6642 useless extension candidates. Maximal degree in co-relation 75231. Up to 6365 conditions per place. [2024-06-03 20:08:18,155 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 563 selfloop transitions, 31 changer transitions 0/598 dead transitions. [2024-06-03 20:08:18,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 598 transitions, 11518 flow [2024-06-03 20:08:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:08:18,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:08:18,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-03 20:08:18,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-03 20:08:18,156 INFO L175 Difference]: Start difference. First operand has 412 places, 581 transitions, 10094 flow. Second operand 9 states and 144 transitions. [2024-06-03 20:08:18,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 598 transitions, 11518 flow [2024-06-03 20:08:23,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 598 transitions, 11426 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 20:08:23,140 INFO L231 Difference]: Finished difference. Result has 417 places, 584 transitions, 10254 flow [2024-06-03 20:08:23,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10002, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10254, PETRI_PLACES=417, PETRI_TRANSITIONS=584} [2024-06-03 20:08:23,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-03 20:08:23,140 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 584 transitions, 10254 flow [2024-06-03 20:08:23,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:08:23,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:23,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:23,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 20:08:23,141 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:23,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:23,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1491027363, now seen corresponding path program 17 times [2024-06-03 20:08:23,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:23,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93683308] [2024-06-03 20:08:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:23,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:24,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:24,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93683308] [2024-06-03 20:08:24,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93683308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:24,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:24,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:08:24,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764681033] [2024-06-03 20:08:24,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:24,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:08:24,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:24,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:08:24,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:08:24,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:08:24,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 584 transitions, 10254 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:08:24,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:24,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:08:24,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:26,331 INFO L124 PetriNetUnfolderBase]: 4276/6667 cut-off events. [2024-06-03 20:08:26,332 INFO L125 PetriNetUnfolderBase]: For 1006361/1006365 co-relation queries the response was YES. [2024-06-03 20:08:26,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76006 conditions, 6667 events. 4276/6667 cut-off events. For 1006361/1006365 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 40351 event pairs, 793 based on Foata normal form. 6/6673 useless extension candidates. Maximal degree in co-relation 75814. Up to 6277 conditions per place. [2024-06-03 20:08:26,453 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 547 selfloop transitions, 55 changer transitions 0/606 dead transitions. [2024-06-03 20:08:26,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 606 transitions, 11939 flow [2024-06-03 20:08:26,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:08:26,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:08:26,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-03 20:08:26,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-03 20:08:26,454 INFO L175 Difference]: Start difference. First operand has 417 places, 584 transitions, 10254 flow. Second operand 9 states and 149 transitions. [2024-06-03 20:08:26,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 606 transitions, 11939 flow [2024-06-03 20:08:31,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 606 transitions, 11709 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-03 20:08:31,590 INFO L231 Difference]: Finished difference. Result has 419 places, 587 transitions, 10296 flow [2024-06-03 20:08:31,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10024, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10296, PETRI_PLACES=419, PETRI_TRANSITIONS=587} [2024-06-03 20:08:31,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-03 20:08:31,590 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 587 transitions, 10296 flow [2024-06-03 20:08:31,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:08:31,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:31,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:31,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 20:08:31,591 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:31,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:31,591 INFO L85 PathProgramCache]: Analyzing trace with hash 99433282, now seen corresponding path program 13 times [2024-06-03 20:08:31,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:31,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913177905] [2024-06-03 20:08:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:31,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:32,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:32,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913177905] [2024-06-03 20:08:32,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913177905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:32,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:32,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:08:32,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062875014] [2024-06-03 20:08:32,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:32,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:08:32,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:32,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:08:32,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:08:32,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:08:32,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 587 transitions, 10296 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:08:32,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:32,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:08:32,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:34,415 INFO L124 PetriNetUnfolderBase]: 4296/6695 cut-off events. [2024-06-03 20:08:34,415 INFO L125 PetriNetUnfolderBase]: For 1033723/1033727 co-relation queries the response was YES. [2024-06-03 20:08:34,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76465 conditions, 6695 events. 4296/6695 cut-off events. For 1033723/1033727 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 40561 event pairs, 808 based on Foata normal form. 8/6703 useless extension candidates. Maximal degree in co-relation 76272. Up to 6368 conditions per place. [2024-06-03 20:08:34,536 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 566 selfloop transitions, 40 changer transitions 0/610 dead transitions. [2024-06-03 20:08:34,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 610 transitions, 11828 flow [2024-06-03 20:08:34,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:08:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:08:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-03 20:08:34,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-03 20:08:34,538 INFO L175 Difference]: Start difference. First operand has 419 places, 587 transitions, 10296 flow. Second operand 9 states and 149 transitions. [2024-06-03 20:08:34,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 610 transitions, 11828 flow [2024-06-03 20:08:39,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 610 transitions, 11418 flow, removed 84 selfloop flow, removed 8 redundant places. [2024-06-03 20:08:39,854 INFO L231 Difference]: Finished difference. Result has 420 places, 591 transitions, 10166 flow [2024-06-03 20:08:39,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9886, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10166, PETRI_PLACES=420, PETRI_TRANSITIONS=591} [2024-06-03 20:08:39,854 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-03 20:08:39,854 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 591 transitions, 10166 flow [2024-06-03 20:08:39,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:08:39,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:39,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:39,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 20:08:39,855 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:39,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:39,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1277265692, now seen corresponding path program 14 times [2024-06-03 20:08:39,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:39,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602523683] [2024-06-03 20:08:39,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:39,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:40,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:40,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602523683] [2024-06-03 20:08:40,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602523683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:40,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:40,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:08:40,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965547227] [2024-06-03 20:08:40,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:40,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:08:40,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:40,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:08:40,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:08:40,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:08:40,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 591 transitions, 10166 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:08:40,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:40,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:08:40,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:42,825 INFO L124 PetriNetUnfolderBase]: 4320/6721 cut-off events. [2024-06-03 20:08:42,825 INFO L125 PetriNetUnfolderBase]: For 1056684/1056688 co-relation queries the response was YES. [2024-06-03 20:08:42,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76448 conditions, 6721 events. 4320/6721 cut-off events. For 1056684/1056688 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40667 event pairs, 821 based on Foata normal form. 12/6733 useless extension candidates. Maximal degree in co-relation 76255. Up to 6422 conditions per place. [2024-06-03 20:08:42,947 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 578 selfloop transitions, 30 changer transitions 0/612 dead transitions. [2024-06-03 20:08:42,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 612 transitions, 11690 flow [2024-06-03 20:08:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:08:42,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:08:42,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 20:08:42,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-03 20:08:42,949 INFO L175 Difference]: Start difference. First operand has 420 places, 591 transitions, 10166 flow. Second operand 9 states and 147 transitions. [2024-06-03 20:08:42,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 612 transitions, 11690 flow [2024-06-03 20:08:47,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 612 transitions, 11451 flow, removed 82 selfloop flow, removed 7 redundant places. [2024-06-03 20:08:47,782 INFO L231 Difference]: Finished difference. Result has 422 places, 595 transitions, 10196 flow [2024-06-03 20:08:47,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9927, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10196, PETRI_PLACES=422, PETRI_TRANSITIONS=595} [2024-06-03 20:08:47,782 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-03 20:08:47,782 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 595 transitions, 10196 flow [2024-06-03 20:08:47,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:08:47,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:47,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:47,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 20:08:47,783 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:47,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:47,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1164426006, now seen corresponding path program 14 times [2024-06-03 20:08:47,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:47,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481379934] [2024-06-03 20:08:47,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:47,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:48,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:48,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481379934] [2024-06-03 20:08:48,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481379934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:48,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:48,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:08:48,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931646000] [2024-06-03 20:08:48,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:48,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:08:48,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:48,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:08:48,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:08:48,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:08:48,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 595 transitions, 10196 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:08:48,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:48,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:08:48,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:50,631 INFO L124 PetriNetUnfolderBase]: 4356/6779 cut-off events. [2024-06-03 20:08:50,632 INFO L125 PetriNetUnfolderBase]: For 1091780/1091784 co-relation queries the response was YES. [2024-06-03 20:08:50,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77362 conditions, 6779 events. 4356/6779 cut-off events. For 1091780/1091784 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 41042 event pairs, 813 based on Foata normal form. 14/6793 useless extension candidates. Maximal degree in co-relation 77168. Up to 6364 conditions per place. [2024-06-03 20:08:50,756 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 562 selfloop transitions, 53 changer transitions 0/619 dead transitions. [2024-06-03 20:08:50,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 619 transitions, 11918 flow [2024-06-03 20:08:50,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:50,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 20:08:50,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-03 20:08:50,757 INFO L175 Difference]: Start difference. First operand has 422 places, 595 transitions, 10196 flow. Second operand 8 states and 137 transitions. [2024-06-03 20:08:50,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 619 transitions, 11918 flow [2024-06-03 20:08:56,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 619 transitions, 11721 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-03 20:08:56,623 INFO L231 Difference]: Finished difference. Result has 423 places, 596 transitions, 10177 flow [2024-06-03 20:08:56,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9999, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10177, PETRI_PLACES=423, PETRI_TRANSITIONS=596} [2024-06-03 20:08:56,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-03 20:08:56,623 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 596 transitions, 10177 flow [2024-06-03 20:08:56,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:08:56,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:08:56,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:08:56,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 20:08:56,624 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:08:56,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:08:56,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1262680340, now seen corresponding path program 3 times [2024-06-03 20:08:56,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:08:56,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417577972] [2024-06-03 20:08:56,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:08:56,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:08:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:08:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:08:57,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:08:57,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417577972] [2024-06-03 20:08:57,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417577972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:08:57,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:08:57,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:08:57,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969615151] [2024-06-03 20:08:57,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:08:57,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:08:57,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:08:57,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:08:57,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:08:57,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:08:57,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 596 transitions, 10177 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:08:57,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:08:57,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:08:57,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:08:59,638 INFO L124 PetriNetUnfolderBase]: 4358/6776 cut-off events. [2024-06-03 20:08:59,639 INFO L125 PetriNetUnfolderBase]: For 1045506/1045510 co-relation queries the response was YES. [2024-06-03 20:08:59,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76934 conditions, 6776 events. 4358/6776 cut-off events. For 1045506/1045510 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 41073 event pairs, 795 based on Foata normal form. 5/6781 useless extension candidates. Maximal degree in co-relation 76739. Up to 6373 conditions per place. [2024-06-03 20:08:59,767 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 529 selfloop transitions, 85 changer transitions 0/618 dead transitions. [2024-06-03 20:08:59,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 618 transitions, 11769 flow [2024-06-03 20:08:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:08:59,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:08:59,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 20:08:59,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-03 20:08:59,769 INFO L175 Difference]: Start difference. First operand has 423 places, 596 transitions, 10177 flow. Second operand 8 states and 135 transitions. [2024-06-03 20:08:59,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 618 transitions, 11769 flow [2024-06-03 20:09:05,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 618 transitions, 11635 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:09:05,036 INFO L231 Difference]: Finished difference. Result has 426 places, 602 transitions, 10491 flow [2024-06-03 20:09:05,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10043, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10491, PETRI_PLACES=426, PETRI_TRANSITIONS=602} [2024-06-03 20:09:05,036 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-03 20:09:05,036 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 602 transitions, 10491 flow [2024-06-03 20:09:05,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:09:05,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:05,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:05,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 20:09:05,037 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:05,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:05,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1600478459, now seen corresponding path program 18 times [2024-06-03 20:09:05,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:05,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298084110] [2024-06-03 20:09:05,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:05,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:06,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:06,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298084110] [2024-06-03 20:09:06,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298084110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:06,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:06,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:06,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198444531] [2024-06-03 20:09:06,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:06,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:06,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:06,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:06,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:06,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:09:06,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 602 transitions, 10491 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:09:06,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:06,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:09:06,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:08,349 INFO L124 PetriNetUnfolderBase]: 4368/6800 cut-off events. [2024-06-03 20:09:08,349 INFO L125 PetriNetUnfolderBase]: For 1064844/1064848 co-relation queries the response was YES. [2024-06-03 20:09:08,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77519 conditions, 6800 events. 4368/6800 cut-off events. For 1064844/1064848 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 41231 event pairs, 837 based on Foata normal form. 6/6806 useless extension candidates. Maximal degree in co-relation 77322. Up to 6519 conditions per place. [2024-06-03 20:09:08,485 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 588 selfloop transitions, 29 changer transitions 0/621 dead transitions. [2024-06-03 20:09:08,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 621 transitions, 11947 flow [2024-06-03 20:09:08,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-03 20:09:08,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-03 20:09:08,486 INFO L175 Difference]: Start difference. First operand has 426 places, 602 transitions, 10491 flow. Second operand 9 states and 145 transitions. [2024-06-03 20:09:08,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 621 transitions, 11947 flow [2024-06-03 20:09:14,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 621 transitions, 11667 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-03 20:09:14,143 INFO L231 Difference]: Finished difference. Result has 429 places, 605 transitions, 10413 flow [2024-06-03 20:09:14,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10211, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10413, PETRI_PLACES=429, PETRI_TRANSITIONS=605} [2024-06-03 20:09:14,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-03 20:09:14,144 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 605 transitions, 10413 flow [2024-06-03 20:09:14,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:09:14,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:14,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:14,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 20:09:14,145 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:14,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:14,145 INFO L85 PathProgramCache]: Analyzing trace with hash -524693756, now seen corresponding path program 15 times [2024-06-03 20:09:14,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:14,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266840979] [2024-06-03 20:09:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:14,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:14,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:14,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266840979] [2024-06-03 20:09:14,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266840979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:14,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:14,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:14,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675192889] [2024-06-03 20:09:14,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:14,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:14,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:14,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:14,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:15,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:09:15,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 605 transitions, 10413 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:09:15,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:15,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:09:15,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:17,038 INFO L124 PetriNetUnfolderBase]: 4383/6827 cut-off events. [2024-06-03 20:09:17,038 INFO L125 PetriNetUnfolderBase]: For 1087858/1087862 co-relation queries the response was YES. [2024-06-03 20:09:17,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77468 conditions, 6827 events. 4383/6827 cut-off events. For 1087858/1087862 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 41409 event pairs, 802 based on Foata normal form. 12/6839 useless extension candidates. Maximal degree in co-relation 77271. Up to 6142 conditions per place. [2024-06-03 20:09:17,175 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 565 selfloop transitions, 61 changer transitions 0/630 dead transitions. [2024-06-03 20:09:17,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 630 transitions, 12207 flow [2024-06-03 20:09:17,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:09:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:09:17,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 20:09:17,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-03 20:09:17,179 INFO L175 Difference]: Start difference. First operand has 429 places, 605 transitions, 10413 flow. Second operand 8 states and 138 transitions. [2024-06-03 20:09:17,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 630 transitions, 12207 flow [2024-06-03 20:09:22,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 630 transitions, 12033 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-03 20:09:22,795 INFO L231 Difference]: Finished difference. Result has 430 places, 606 transitions, 10433 flow [2024-06-03 20:09:22,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10239, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10433, PETRI_PLACES=430, PETRI_TRANSITIONS=606} [2024-06-03 20:09:22,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-03 20:09:22,801 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 606 transitions, 10433 flow [2024-06-03 20:09:22,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:09:22,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:22,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:22,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 20:09:22,803 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:22,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:22,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1490760236, now seen corresponding path program 15 times [2024-06-03 20:09:22,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:22,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129709519] [2024-06-03 20:09:22,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:22,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:23,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:23,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129709519] [2024-06-03 20:09:23,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129709519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:23,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:23,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:23,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072196130] [2024-06-03 20:09:23,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:23,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:23,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:23,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:23,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:23,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:09:23,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 606 transitions, 10433 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:09:23,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:23,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:09:23,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:25,760 INFO L124 PetriNetUnfolderBase]: 4409/6861 cut-off events. [2024-06-03 20:09:25,760 INFO L125 PetriNetUnfolderBase]: For 1092639/1092639 co-relation queries the response was YES. [2024-06-03 20:09:25,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78580 conditions, 6861 events. 4409/6861 cut-off events. For 1092639/1092639 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 41695 event pairs, 798 based on Foata normal form. 2/6862 useless extension candidates. Maximal degree in co-relation 78382. Up to 6357 conditions per place. [2024-06-03 20:09:25,891 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 546 selfloop transitions, 86 changer transitions 0/636 dead transitions. [2024-06-03 20:09:25,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 636 transitions, 12499 flow [2024-06-03 20:09:25,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:25,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:25,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 20:09:25,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:09:25,892 INFO L175 Difference]: Start difference. First operand has 430 places, 606 transitions, 10433 flow. Second operand 9 states and 153 transitions. [2024-06-03 20:09:25,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 636 transitions, 12499 flow [2024-06-03 20:09:31,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 636 transitions, 12333 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-03 20:09:31,890 INFO L231 Difference]: Finished difference. Result has 433 places, 617 transitions, 10953 flow [2024-06-03 20:09:31,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10269, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10953, PETRI_PLACES=433, PETRI_TRANSITIONS=617} [2024-06-03 20:09:31,891 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-03 20:09:31,891 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 617 transitions, 10953 flow [2024-06-03 20:09:31,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:09:31,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:31,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:31,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 20:09:31,892 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:31,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:31,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1491027146, now seen corresponding path program 16 times [2024-06-03 20:09:31,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:31,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800344553] [2024-06-03 20:09:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:31,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:32,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:32,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:32,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800344553] [2024-06-03 20:09:32,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800344553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:32,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:32,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:32,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247910096] [2024-06-03 20:09:32,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:32,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:32,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:32,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:32,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:32,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:09:32,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 617 transitions, 10953 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:09:32,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:32,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:09:32,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:34,757 INFO L124 PetriNetUnfolderBase]: 4429/6889 cut-off events. [2024-06-03 20:09:34,757 INFO L125 PetriNetUnfolderBase]: For 1110397/1110401 co-relation queries the response was YES. [2024-06-03 20:09:34,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79310 conditions, 6889 events. 4429/6889 cut-off events. For 1110397/1110401 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 41779 event pairs, 800 based on Foata normal form. 8/6897 useless extension candidates. Maximal degree in co-relation 79111. Up to 6383 conditions per place. [2024-06-03 20:09:34,888 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 564 selfloop transitions, 77 changer transitions 0/645 dead transitions. [2024-06-03 20:09:34,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 645 transitions, 13134 flow [2024-06-03 20:09:34,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:34,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:34,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 20:09:34,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-03 20:09:34,890 INFO L175 Difference]: Start difference. First operand has 433 places, 617 transitions, 10953 flow. Second operand 9 states and 155 transitions. [2024-06-03 20:09:34,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 645 transitions, 13134 flow [2024-06-03 20:09:41,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 645 transitions, 12856 flow, removed 113 selfloop flow, removed 4 redundant places. [2024-06-03 20:09:41,190 INFO L231 Difference]: Finished difference. Result has 438 places, 623 transitions, 11139 flow [2024-06-03 20:09:41,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10691, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11139, PETRI_PLACES=438, PETRI_TRANSITIONS=623} [2024-06-03 20:09:41,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-03 20:09:41,191 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 623 transitions, 11139 flow [2024-06-03 20:09:41,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:09:41,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:41,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:41,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 20:09:41,191 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:41,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:41,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1498379013, now seen corresponding path program 19 times [2024-06-03 20:09:41,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:41,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025139795] [2024-06-03 20:09:41,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:41,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:42,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:42,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025139795] [2024-06-03 20:09:42,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025139795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:42,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:42,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:09:42,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786401522] [2024-06-03 20:09:42,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:42,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:09:42,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:42,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:09:42,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:09:42,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:09:42,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 623 transitions, 11139 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:09:42,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:42,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:09:42,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:44,646 INFO L124 PetriNetUnfolderBase]: 4423/6883 cut-off events. [2024-06-03 20:09:44,646 INFO L125 PetriNetUnfolderBase]: For 1100497/1100497 co-relation queries the response was YES. [2024-06-03 20:09:44,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78983 conditions, 6883 events. 4423/6883 cut-off events. For 1100497/1100497 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 41823 event pairs, 835 based on Foata normal form. 2/6884 useless extension candidates. Maximal degree in co-relation 78782. Up to 6523 conditions per place. [2024-06-03 20:09:44,761 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 588 selfloop transitions, 50 changer transitions 0/642 dead transitions. [2024-06-03 20:09:44,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 642 transitions, 12550 flow [2024-06-03 20:09:44,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:09:44,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:09:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 20:09:44,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-03 20:09:44,762 INFO L175 Difference]: Start difference. First operand has 438 places, 623 transitions, 11139 flow. Second operand 9 states and 150 transitions. [2024-06-03 20:09:44,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 642 transitions, 12550 flow [2024-06-03 20:09:50,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 642 transitions, 11737 flow, removed 158 selfloop flow, removed 9 redundant places. [2024-06-03 20:09:50,584 INFO L231 Difference]: Finished difference. Result has 438 places, 623 transitions, 10432 flow [2024-06-03 20:09:50,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10326, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10432, PETRI_PLACES=438, PETRI_TRANSITIONS=623} [2024-06-03 20:09:50,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-03 20:09:50,596 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 623 transitions, 10432 flow [2024-06-03 20:09:50,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:09:50,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:09:50,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:09:50,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 20:09:50,597 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:09:50,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:09:50,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1901221374, now seen corresponding path program 1 times [2024-06-03 20:09:50,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:09:50,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790739809] [2024-06-03 20:09:50,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:09:50,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:09:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:09:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:09:51,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:09:51,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790739809] [2024-06-03 20:09:51,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790739809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:09:51,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:09:51,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:09:51,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792758957] [2024-06-03 20:09:51,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:09:51,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:09:51,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:09:51,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:09:51,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:09:51,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:09:51,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 623 transitions, 10432 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:09:51,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:09:51,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:09:51,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:09:54,606 INFO L124 PetriNetUnfolderBase]: 5017/7808 cut-off events. [2024-06-03 20:09:54,607 INFO L125 PetriNetUnfolderBase]: For 1896396/1896400 co-relation queries the response was YES. [2024-06-03 20:09:54,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95921 conditions, 7808 events. 5017/7808 cut-off events. For 1896396/1896400 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 47850 event pairs, 985 based on Foata normal form. 60/7868 useless extension candidates. Maximal degree in co-relation 95721. Up to 6118 conditions per place. [2024-06-03 20:09:54,755 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 571 selfloop transitions, 99 changer transitions 9/683 dead transitions. [2024-06-03 20:09:54,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 683 transitions, 12882 flow [2024-06-03 20:09:54,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:09:54,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:09:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-03 20:09:54,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-03 20:09:54,757 INFO L175 Difference]: Start difference. First operand has 438 places, 623 transitions, 10432 flow. Second operand 11 states and 209 transitions. [2024-06-03 20:09:54,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 683 transitions, 12882 flow [2024-06-03 20:10:02,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 683 transitions, 12706 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-03 20:10:02,492 INFO L231 Difference]: Finished difference. Result has 443 places, 629 transitions, 10714 flow [2024-06-03 20:10:02,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10256, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10714, PETRI_PLACES=443, PETRI_TRANSITIONS=629} [2024-06-03 20:10:02,493 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-03 20:10:02,493 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 629 transitions, 10714 flow [2024-06-03 20:10:02,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:02,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:02,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:02,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 20:10:02,494 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:02,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:02,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1901160924, now seen corresponding path program 2 times [2024-06-03 20:10:02,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:02,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821506397] [2024-06-03 20:10:02,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:02,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:03,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:03,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821506397] [2024-06-03 20:10:03,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821506397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:03,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:03,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:10:03,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073543774] [2024-06-03 20:10:03,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:03,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:10:03,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:03,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:10:03,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:10:04,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:10:04,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 629 transitions, 10714 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:04,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:04,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:10:04,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:06,905 INFO L124 PetriNetUnfolderBase]: 5082/7917 cut-off events. [2024-06-03 20:10:06,905 INFO L125 PetriNetUnfolderBase]: For 1928068/1928072 co-relation queries the response was YES. [2024-06-03 20:10:06,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98890 conditions, 7917 events. 5082/7917 cut-off events. For 1928068/1928072 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 48572 event pairs, 1178 based on Foata normal form. 58/7975 useless extension candidates. Maximal degree in co-relation 98687. Up to 7023 conditions per place. [2024-06-03 20:10:07,037 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 564 selfloop transitions, 107 changer transitions 3/678 dead transitions. [2024-06-03 20:10:07,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 678 transitions, 12650 flow [2024-06-03 20:10:07,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:10:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:10:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-03 20:10:07,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-03 20:10:07,039 INFO L175 Difference]: Start difference. First operand has 443 places, 629 transitions, 10714 flow. Second operand 11 states and 198 transitions. [2024-06-03 20:10:07,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 678 transitions, 12650 flow [2024-06-03 20:10:14,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 678 transitions, 12403 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-03 20:10:14,028 INFO L231 Difference]: Finished difference. Result has 448 places, 641 transitions, 10995 flow [2024-06-03 20:10:14,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10507, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10995, PETRI_PLACES=448, PETRI_TRANSITIONS=641} [2024-06-03 20:10:14,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-03 20:10:14,029 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 641 transitions, 10995 flow [2024-06-03 20:10:14,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:14,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:14,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:14,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 20:10:14,029 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:14,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:14,030 INFO L85 PathProgramCache]: Analyzing trace with hash -709395022, now seen corresponding path program 1 times [2024-06-03 20:10:14,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:14,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713353277] [2024-06-03 20:10:14,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:14,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:15,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:15,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713353277] [2024-06-03 20:10:15,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713353277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:15,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:15,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:10:15,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830817537] [2024-06-03 20:10:15,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:15,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:10:15,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:15,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:10:15,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:10:15,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:10:15,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 641 transitions, 10995 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:15,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:15,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:10:15,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:17,823 INFO L124 PetriNetUnfolderBase]: 4950/7727 cut-off events. [2024-06-03 20:10:17,823 INFO L125 PetriNetUnfolderBase]: For 1683497/1683501 co-relation queries the response was YES. [2024-06-03 20:10:17,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89162 conditions, 7727 events. 4950/7727 cut-off events. For 1683497/1683501 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 47495 event pairs, 1044 based on Foata normal form. 82/7809 useless extension candidates. Maximal degree in co-relation 88958. Up to 6442 conditions per place. [2024-06-03 20:10:17,973 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 559 selfloop transitions, 105 changer transitions 5/673 dead transitions. [2024-06-03 20:10:17,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 673 transitions, 12730 flow [2024-06-03 20:10:17,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:10:17,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:10:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 20:10:17,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-03 20:10:17,974 INFO L175 Difference]: Start difference. First operand has 448 places, 641 transitions, 10995 flow. Second operand 9 states and 165 transitions. [2024-06-03 20:10:17,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 673 transitions, 12730 flow [2024-06-03 20:10:25,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 673 transitions, 12452 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-03 20:10:25,109 INFO L231 Difference]: Finished difference. Result has 449 places, 640 transitions, 11028 flow [2024-06-03 20:10:25,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10737, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11028, PETRI_PLACES=449, PETRI_TRANSITIONS=640} [2024-06-03 20:10:25,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-03 20:10:25,110 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 640 transitions, 11028 flow [2024-06-03 20:10:25,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:25,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:25,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:25,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 20:10:25,111 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:25,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:25,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1782895304, now seen corresponding path program 2 times [2024-06-03 20:10:25,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:25,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942086606] [2024-06-03 20:10:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:25,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:26,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:26,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942086606] [2024-06-03 20:10:26,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942086606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:26,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:26,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:10:26,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295897241] [2024-06-03 20:10:26,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:26,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:10:26,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:26,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:10:26,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:10:26,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:10:26,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 640 transitions, 11028 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:26,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:26,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:10:26,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:28,644 INFO L124 PetriNetUnfolderBase]: 4914/7685 cut-off events. [2024-06-03 20:10:28,644 INFO L125 PetriNetUnfolderBase]: For 1238484/1238484 co-relation queries the response was YES. [2024-06-03 20:10:28,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88309 conditions, 7685 events. 4914/7685 cut-off events. For 1238484/1238484 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 47463 event pairs, 1019 based on Foata normal form. 2/7687 useless extension candidates. Maximal degree in co-relation 88104. Up to 7369 conditions per place. [2024-06-03 20:10:28,790 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 625 selfloop transitions, 41 changer transitions 0/670 dead transitions. [2024-06-03 20:10:28,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 670 transitions, 12586 flow [2024-06-03 20:10:28,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:10:28,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:10:28,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 20:10:28,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-03 20:10:28,791 INFO L175 Difference]: Start difference. First operand has 449 places, 640 transitions, 11028 flow. Second operand 9 states and 153 transitions. [2024-06-03 20:10:28,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 670 transitions, 12586 flow [2024-06-03 20:10:33,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 670 transitions, 12339 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-03 20:10:34,032 INFO L231 Difference]: Finished difference. Result has 453 places, 647 transitions, 11030 flow [2024-06-03 20:10:34,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10781, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11030, PETRI_PLACES=453, PETRI_TRANSITIONS=647} [2024-06-03 20:10:34,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-03 20:10:34,033 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 647 transitions, 11030 flow [2024-06-03 20:10:34,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:34,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:34,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:34,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 20:10:34,034 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:34,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:34,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1783073244, now seen corresponding path program 3 times [2024-06-03 20:10:34,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:34,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30040777] [2024-06-03 20:10:34,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:34,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:35,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:35,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30040777] [2024-06-03 20:10:35,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30040777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:35,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:35,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:10:35,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167364647] [2024-06-03 20:10:35,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:35,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:10:35,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:35,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:10:35,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:10:35,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:10:35,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 647 transitions, 11030 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:35,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:35,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:10:35,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:37,753 INFO L124 PetriNetUnfolderBase]: 4950/7741 cut-off events. [2024-06-03 20:10:37,754 INFO L125 PetriNetUnfolderBase]: For 1285424/1285424 co-relation queries the response was YES. [2024-06-03 20:10:37,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88646 conditions, 7741 events. 4950/7741 cut-off events. For 1285424/1285424 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 47858 event pairs, 1023 based on Foata normal form. 10/7751 useless extension candidates. Maximal degree in co-relation 88437. Up to 7332 conditions per place. [2024-06-03 20:10:37,907 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 617 selfloop transitions, 54 changer transitions 0/675 dead transitions. [2024-06-03 20:10:37,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 675 transitions, 12632 flow [2024-06-03 20:10:37,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:10:37,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:10:37,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 20:10:37,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-03 20:10:37,908 INFO L175 Difference]: Start difference. First operand has 453 places, 647 transitions, 11030 flow. Second operand 9 states and 160 transitions. [2024-06-03 20:10:37,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 675 transitions, 12632 flow [2024-06-03 20:10:43,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 675 transitions, 12517 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-03 20:10:43,658 INFO L231 Difference]: Finished difference. Result has 458 places, 648 transitions, 11074 flow [2024-06-03 20:10:43,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10915, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11074, PETRI_PLACES=458, PETRI_TRANSITIONS=648} [2024-06-03 20:10:43,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-03 20:10:43,659 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 648 transitions, 11074 flow [2024-06-03 20:10:43,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:43,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:43,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:43,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 20:10:43,660 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:43,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:43,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1782888794, now seen corresponding path program 3 times [2024-06-03 20:10:43,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:43,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315091521] [2024-06-03 20:10:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:43,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:44,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:44,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315091521] [2024-06-03 20:10:44,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315091521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:44,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:44,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:10:44,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366877921] [2024-06-03 20:10:44,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:44,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:10:44,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:44,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:10:44,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:10:44,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:10:44,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 648 transitions, 11074 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:44,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:44,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:10:44,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:47,213 INFO L124 PetriNetUnfolderBase]: 4978/7783 cut-off events. [2024-06-03 20:10:47,213 INFO L125 PetriNetUnfolderBase]: For 1292146/1292146 co-relation queries the response was YES. [2024-06-03 20:10:47,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89299 conditions, 7783 events. 4978/7783 cut-off events. For 1292146/1292146 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 48159 event pairs, 1018 based on Foata normal form. 8/7791 useless extension candidates. Maximal degree in co-relation 89089. Up to 7244 conditions per place. [2024-06-03 20:10:47,375 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 618 selfloop transitions, 58 changer transitions 0/680 dead transitions. [2024-06-03 20:10:47,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 680 transitions, 12758 flow [2024-06-03 20:10:47,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:10:47,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:10:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 20:10:47,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-03 20:10:47,376 INFO L175 Difference]: Start difference. First operand has 458 places, 648 transitions, 11074 flow. Second operand 9 states and 161 transitions. [2024-06-03 20:10:47,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 680 transitions, 12758 flow [2024-06-03 20:10:53,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 680 transitions, 12631 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 20:10:53,635 INFO L231 Difference]: Finished difference. Result has 460 places, 649 transitions, 11113 flow [2024-06-03 20:10:53,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10947, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11113, PETRI_PLACES=460, PETRI_TRANSITIONS=649} [2024-06-03 20:10:53,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 418 predicate places. [2024-06-03 20:10:53,641 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 649 transitions, 11113 flow [2024-06-03 20:10:53,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:53,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:10:53,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:10:53,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 20:10:53,641 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:10:53,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:10:53,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1611000060, now seen corresponding path program 4 times [2024-06-03 20:10:53,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:10:53,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370959840] [2024-06-03 20:10:53,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:10:53,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:10:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:10:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:10:54,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:10:54,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370959840] [2024-06-03 20:10:54,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370959840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:10:54,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:10:54,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:10:54,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874083474] [2024-06-03 20:10:54,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:10:54,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:10:54,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:10:54,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:10:54,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:10:55,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:10:55,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 649 transitions, 11113 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:10:55,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:10:55,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:10:55,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:10:57,706 INFO L124 PetriNetUnfolderBase]: 4986/7795 cut-off events. [2024-06-03 20:10:57,706 INFO L125 PetriNetUnfolderBase]: For 1270422/1270422 co-relation queries the response was YES. [2024-06-03 20:10:57,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89477 conditions, 7795 events. 4986/7795 cut-off events. For 1270422/1270422 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 48335 event pairs, 1054 based on Foata normal form. 2/7797 useless extension candidates. Maximal degree in co-relation 89266. Up to 7535 conditions per place. [2024-06-03 20:10:57,946 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 643 selfloop transitions, 24 changer transitions 0/671 dead transitions. [2024-06-03 20:10:57,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 671 transitions, 12617 flow [2024-06-03 20:10:57,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:10:57,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:10:57,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 20:10:57,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-03 20:10:57,947 INFO L175 Difference]: Start difference. First operand has 460 places, 649 transitions, 11113 flow. Second operand 9 states and 147 transitions. [2024-06-03 20:10:57,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 671 transitions, 12617 flow [2024-06-03 20:11:02,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 671 transitions, 12484 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:11:02,022 INFO L231 Difference]: Finished difference. Result has 463 places, 651 transitions, 11111 flow [2024-06-03 20:11:02,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10980, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11111, PETRI_PLACES=463, PETRI_TRANSITIONS=651} [2024-06-03 20:11:02,023 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-03 20:11:02,023 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 651 transitions, 11111 flow [2024-06-03 20:11:02,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:02,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:02,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:02,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 20:11:02,023 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:02,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:02,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1610993550, now seen corresponding path program 5 times [2024-06-03 20:11:02,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:02,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988668161] [2024-06-03 20:11:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:02,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:03,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:03,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988668161] [2024-06-03 20:11:03,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988668161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:03,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:03,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:03,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766826649] [2024-06-03 20:11:03,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:03,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:03,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:03,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:03,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:03,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:11:03,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 651 transitions, 11111 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:03,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:03,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:11:03,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:06,141 INFO L124 PetriNetUnfolderBase]: 4994/7809 cut-off events. [2024-06-03 20:11:06,141 INFO L125 PetriNetUnfolderBase]: For 1284788/1284788 co-relation queries the response was YES. [2024-06-03 20:11:06,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89524 conditions, 7809 events. 4994/7809 cut-off events. For 1284788/1284788 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 48421 event pairs, 1054 based on Foata normal form. 2/7811 useless extension candidates. Maximal degree in co-relation 89312. Up to 7533 conditions per place. [2024-06-03 20:11:06,286 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 642 selfloop transitions, 27 changer transitions 0/673 dead transitions. [2024-06-03 20:11:06,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 673 transitions, 12613 flow [2024-06-03 20:11:06,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:11:06,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:11:06,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-03 20:11:06,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-03 20:11:06,288 INFO L175 Difference]: Start difference. First operand has 463 places, 651 transitions, 11111 flow. Second operand 9 states and 148 transitions. [2024-06-03 20:11:06,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 673 transitions, 12613 flow [2024-06-03 20:11:11,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 673 transitions, 12506 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:11,966 INFO L231 Difference]: Finished difference. Result has 467 places, 653 transitions, 11145 flow [2024-06-03 20:11:11,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11004, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11145, PETRI_PLACES=467, PETRI_TRANSITIONS=653} [2024-06-03 20:11:11,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-03 20:11:11,967 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 653 transitions, 11145 flow [2024-06-03 20:11:11,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:11,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:11,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:11,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 20:11:11,968 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:11,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:11,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1610762910, now seen corresponding path program 6 times [2024-06-03 20:11:11,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:11,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547274719] [2024-06-03 20:11:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:11,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:13,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:13,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547274719] [2024-06-03 20:11:13,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547274719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:13,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:13,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:11:13,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629391916] [2024-06-03 20:11:13,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:13,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:11:13,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:13,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:11:13,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:11:13,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:11:13,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 653 transitions, 11145 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:13,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:13,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:11:13,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:15,840 INFO L124 PetriNetUnfolderBase]: 5002/7819 cut-off events. [2024-06-03 20:11:15,840 INFO L125 PetriNetUnfolderBase]: For 1301603/1301603 co-relation queries the response was YES. [2024-06-03 20:11:15,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89879 conditions, 7819 events. 5002/7819 cut-off events. For 1301603/1301603 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 48509 event pairs, 1050 based on Foata normal form. 2/7821 useless extension candidates. Maximal degree in co-relation 89666. Up to 7559 conditions per place. [2024-06-03 20:11:15,989 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 649 selfloop transitions, 22 changer transitions 0/675 dead transitions. [2024-06-03 20:11:15,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 675 transitions, 12645 flow [2024-06-03 20:11:15,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:11:15,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:11:15,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-03 20:11:15,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-03 20:11:15,990 INFO L175 Difference]: Start difference. First operand has 467 places, 653 transitions, 11145 flow. Second operand 9 states and 145 transitions. [2024-06-03 20:11:15,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 675 transitions, 12645 flow [2024-06-03 20:11:22,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 675 transitions, 12520 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-03 20:11:22,069 INFO L231 Difference]: Finished difference. Result has 469 places, 655 transitions, 11155 flow [2024-06-03 20:11:22,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11020, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11155, PETRI_PLACES=469, PETRI_TRANSITIONS=655} [2024-06-03 20:11:22,070 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-03 20:11:22,070 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 655 transitions, 11155 flow [2024-06-03 20:11:22,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:22,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:22,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:22,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 20:11:22,071 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:22,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:22,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1617434110, now seen corresponding path program 4 times [2024-06-03 20:11:22,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:22,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482380233] [2024-06-03 20:11:22,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:22,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:23,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:23,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482380233] [2024-06-03 20:11:23,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482380233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:23,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:23,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:11:23,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029450581] [2024-06-03 20:11:23,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:23,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:11:23,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:23,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:11:23,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:11:23,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:11:23,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 655 transitions, 11155 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:23,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:23,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:11:23,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:26,570 INFO L124 PetriNetUnfolderBase]: 5038/7875 cut-off events. [2024-06-03 20:11:26,570 INFO L125 PetriNetUnfolderBase]: For 1378695/1378695 co-relation queries the response was YES. [2024-06-03 20:11:26,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90832 conditions, 7875 events. 5038/7875 cut-off events. For 1378695/1378695 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 48829 event pairs, 1062 based on Foata normal form. 10/7885 useless extension candidates. Maximal degree in co-relation 90618. Up to 7571 conditions per place. [2024-06-03 20:11:26,708 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 652 selfloop transitions, 26 changer transitions 0/682 dead transitions. [2024-06-03 20:11:26,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 682 transitions, 12783 flow [2024-06-03 20:11:26,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:11:26,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:11:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-03 20:11:26,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-03 20:11:26,709 INFO L175 Difference]: Start difference. First operand has 469 places, 655 transitions, 11155 flow. Second operand 10 states and 164 transitions. [2024-06-03 20:11:26,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 682 transitions, 12783 flow [2024-06-03 20:11:33,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 682 transitions, 12664 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-03 20:11:33,595 INFO L231 Difference]: Finished difference. Result has 472 places, 656 transitions, 11147 flow [2024-06-03 20:11:33,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11036, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11147, PETRI_PLACES=472, PETRI_TRANSITIONS=656} [2024-06-03 20:11:33,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-03 20:11:33,596 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 656 transitions, 11147 flow [2024-06-03 20:11:33,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:33,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:33,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:33,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 20:11:33,597 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:33,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:33,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1760987418, now seen corresponding path program 7 times [2024-06-03 20:11:33,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:33,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994845260] [2024-06-03 20:11:33,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:33,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:34,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:34,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994845260] [2024-06-03 20:11:34,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994845260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:34,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:34,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:11:34,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380870884] [2024-06-03 20:11:34,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:34,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:11:34,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:34,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:11:34,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:11:34,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:11:34,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 656 transitions, 11147 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:34,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:34,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:11:34,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:37,714 INFO L124 PetriNetUnfolderBase]: 5069/7924 cut-off events. [2024-06-03 20:11:37,714 INFO L125 PetriNetUnfolderBase]: For 1403707/1403707 co-relation queries the response was YES. [2024-06-03 20:11:37,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91454 conditions, 7924 events. 5069/7924 cut-off events. For 1403707/1403707 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 49239 event pairs, 1138 based on Foata normal form. 12/7936 useless extension candidates. Maximal degree in co-relation 91239. Up to 7625 conditions per place. [2024-06-03 20:11:37,854 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 654 selfloop transitions, 20 changer transitions 0/678 dead transitions. [2024-06-03 20:11:37,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 678 transitions, 12765 flow [2024-06-03 20:11:37,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:11:37,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:11:37,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-03 20:11:37,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-03 20:11:37,856 INFO L175 Difference]: Start difference. First operand has 472 places, 656 transitions, 11147 flow. Second operand 9 states and 146 transitions. [2024-06-03 20:11:37,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 678 transitions, 12765 flow [2024-06-03 20:11:44,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 678 transitions, 12674 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-03 20:11:44,472 INFO L231 Difference]: Finished difference. Result has 473 places, 657 transitions, 11158 flow [2024-06-03 20:11:44,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11056, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11158, PETRI_PLACES=473, PETRI_TRANSITIONS=657} [2024-06-03 20:11:44,473 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-03 20:11:44,473 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 657 transitions, 11158 flow [2024-06-03 20:11:44,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:44,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:44,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:44,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 20:11:44,474 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:44,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:44,474 INFO L85 PathProgramCache]: Analyzing trace with hash 113502322, now seen corresponding path program 8 times [2024-06-03 20:11:44,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:44,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756831973] [2024-06-03 20:11:44,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:44,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:45,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:45,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756831973] [2024-06-03 20:11:45,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756831973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:45,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:45,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:11:45,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158959197] [2024-06-03 20:11:45,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:45,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:11:45,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:45,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:11:45,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:11:45,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:11:45,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 657 transitions, 11158 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:45,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:45,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:11:45,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:48,519 INFO L124 PetriNetUnfolderBase]: 5097/7970 cut-off events. [2024-06-03 20:11:48,519 INFO L125 PetriNetUnfolderBase]: For 1392445/1392445 co-relation queries the response was YES. [2024-06-03 20:11:48,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91882 conditions, 7970 events. 5097/7970 cut-off events. For 1392445/1392445 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 49673 event pairs, 1140 based on Foata normal form. 8/7978 useless extension candidates. Maximal degree in co-relation 91666. Up to 7631 conditions per place. [2024-06-03 20:11:48,661 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 656 selfloop transitions, 22 changer transitions 0/682 dead transitions. [2024-06-03 20:11:48,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 682 transitions, 12834 flow [2024-06-03 20:11:48,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:11:48,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:11:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-03 20:11:48,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-03 20:11:48,663 INFO L175 Difference]: Start difference. First operand has 473 places, 657 transitions, 11158 flow. Second operand 9 states and 149 transitions. [2024-06-03 20:11:48,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 682 transitions, 12834 flow [2024-06-03 20:11:54,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 682 transitions, 12776 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 20:11:54,799 INFO L231 Difference]: Finished difference. Result has 477 places, 658 transitions, 11206 flow [2024-06-03 20:11:54,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11100, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11206, PETRI_PLACES=477, PETRI_TRANSITIONS=658} [2024-06-03 20:11:54,799 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-03 20:11:54,799 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 658 transitions, 11206 flow [2024-06-03 20:11:54,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:54,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:11:54,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:11:54,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 20:11:54,800 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:11:54,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:11:54,800 INFO L85 PathProgramCache]: Analyzing trace with hash 113732962, now seen corresponding path program 9 times [2024-06-03 20:11:54,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:11:54,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160283880] [2024-06-03 20:11:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:11:54,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:11:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:11:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:11:56,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:11:56,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160283880] [2024-06-03 20:11:56,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160283880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:11:56,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:11:56,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:11:56,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473172804] [2024-06-03 20:11:56,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:11:56,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:11:56,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:11:56,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:11:56,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:11:56,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:11:56,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 658 transitions, 11206 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:11:56,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:11:56,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:11:56,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:11:58,874 INFO L124 PetriNetUnfolderBase]: 5125/8014 cut-off events. [2024-06-03 20:11:58,874 INFO L125 PetriNetUnfolderBase]: For 1410264/1410264 co-relation queries the response was YES. [2024-06-03 20:11:58,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92368 conditions, 8014 events. 5125/8014 cut-off events. For 1410264/1410264 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 50005 event pairs, 1158 based on Foata normal form. 8/8022 useless extension candidates. Maximal degree in co-relation 92151. Up to 7743 conditions per place. [2024-06-03 20:11:59,011 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 658 selfloop transitions, 16 changer transitions 0/678 dead transitions. [2024-06-03 20:11:59,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 678 transitions, 12722 flow [2024-06-03 20:11:59,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:11:59,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:11:59,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-03 20:11:59,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-03 20:11:59,012 INFO L175 Difference]: Start difference. First operand has 477 places, 658 transitions, 11206 flow. Second operand 9 states and 141 transitions. [2024-06-03 20:11:59,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 678 transitions, 12722 flow [2024-06-03 20:12:04,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 678 transitions, 12636 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-03 20:12:04,231 INFO L231 Difference]: Finished difference. Result has 478 places, 659 transitions, 11216 flow [2024-06-03 20:12:04,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11120, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11216, PETRI_PLACES=478, PETRI_TRANSITIONS=659} [2024-06-03 20:12:04,236 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-03 20:12:04,236 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 659 transitions, 11216 flow [2024-06-03 20:12:04,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:04,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:04,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:04,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 20:12:04,252 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:04,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:04,252 INFO L85 PathProgramCache]: Analyzing trace with hash -239585950, now seen corresponding path program 10 times [2024-06-03 20:12:04,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:04,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377801295] [2024-06-03 20:12:04,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:04,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:05,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:05,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:05,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377801295] [2024-06-03 20:12:05,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377801295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:05,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:05,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:12:05,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574703606] [2024-06-03 20:12:05,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:05,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:12:05,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:05,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:12:05,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:12:05,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:12:05,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 659 transitions, 11216 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:05,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:05,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:12:05,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:08,245 INFO L124 PetriNetUnfolderBase]: 5133/8024 cut-off events. [2024-06-03 20:12:08,245 INFO L125 PetriNetUnfolderBase]: For 1389123/1389123 co-relation queries the response was YES. [2024-06-03 20:12:08,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92388 conditions, 8024 events. 5133/8024 cut-off events. For 1389123/1389123 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 49996 event pairs, 1142 based on Foata normal form. 2/8026 useless extension candidates. Maximal degree in co-relation 92170. Up to 7774 conditions per place. [2024-06-03 20:12:08,390 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 655 selfloop transitions, 18 changer transitions 0/677 dead transitions. [2024-06-03 20:12:08,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 677 transitions, 12698 flow [2024-06-03 20:12:08,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:08,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-03 20:12:08,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-03 20:12:08,392 INFO L175 Difference]: Start difference. First operand has 478 places, 659 transitions, 11216 flow. Second operand 9 states and 139 transitions. [2024-06-03 20:12:08,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 677 transitions, 12698 flow [2024-06-03 20:12:14,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 677 transitions, 12626 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-03 20:12:14,286 INFO L231 Difference]: Finished difference. Result has 480 places, 661 transitions, 11283 flow [2024-06-03 20:12:14,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11144, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11283, PETRI_PLACES=480, PETRI_TRANSITIONS=661} [2024-06-03 20:12:14,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-03 20:12:14,287 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 661 transitions, 11283 flow [2024-06-03 20:12:14,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:14,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:14,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:14,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 20:12:14,288 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:14,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:14,288 INFO L85 PathProgramCache]: Analyzing trace with hash -2122735048, now seen corresponding path program 11 times [2024-06-03 20:12:14,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:14,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233679824] [2024-06-03 20:12:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:14,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:15,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:15,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233679824] [2024-06-03 20:12:15,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233679824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:15,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:15,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:12:15,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015961825] [2024-06-03 20:12:15,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:15,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:12:15,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:15,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:12:15,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:12:15,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:12:15,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 661 transitions, 11283 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:15,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:15,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:12:15,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:18,375 INFO L124 PetriNetUnfolderBase]: 5156/8061 cut-off events. [2024-06-03 20:12:18,375 INFO L125 PetriNetUnfolderBase]: For 1445264/1445264 co-relation queries the response was YES. [2024-06-03 20:12:18,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92631 conditions, 8061 events. 5156/8061 cut-off events. For 1445264/1445264 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 50262 event pairs, 1159 based on Foata normal form. 10/8071 useless extension candidates. Maximal degree in co-relation 92412. Up to 7705 conditions per place. [2024-06-03 20:12:18,523 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 648 selfloop transitions, 32 changer transitions 0/684 dead transitions. [2024-06-03 20:12:18,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 684 transitions, 12959 flow [2024-06-03 20:12:18,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:18,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 20:12:18,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-03 20:12:18,525 INFO L175 Difference]: Start difference. First operand has 480 places, 661 transitions, 11283 flow. Second operand 9 states and 147 transitions. [2024-06-03 20:12:18,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 684 transitions, 12959 flow [2024-06-03 20:12:25,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 684 transitions, 12836 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-03 20:12:25,153 INFO L231 Difference]: Finished difference. Result has 482 places, 662 transitions, 11297 flow [2024-06-03 20:12:25,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11160, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11297, PETRI_PLACES=482, PETRI_TRANSITIONS=662} [2024-06-03 20:12:25,157 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-03 20:12:25,157 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 662 transitions, 11297 flow [2024-06-03 20:12:25,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:25,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:25,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:25,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 20:12:25,157 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:25,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:25,158 INFO L85 PathProgramCache]: Analyzing trace with hash -2122728538, now seen corresponding path program 12 times [2024-06-03 20:12:25,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:25,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168971266] [2024-06-03 20:12:25,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:25,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:26,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:26,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168971266] [2024-06-03 20:12:26,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168971266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:26,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:26,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:12:26,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905138788] [2024-06-03 20:12:26,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:26,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:12:26,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:26,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:12:26,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:12:26,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:12:26,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 662 transitions, 11297 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:26,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:26,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:12:26,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:29,288 INFO L124 PetriNetUnfolderBase]: 5184/8107 cut-off events. [2024-06-03 20:12:29,288 INFO L125 PetriNetUnfolderBase]: For 1450177/1450177 co-relation queries the response was YES. [2024-06-03 20:12:29,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93413 conditions, 8107 events. 5184/8107 cut-off events. For 1450177/1450177 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 50665 event pairs, 1153 based on Foata normal form. 8/8115 useless extension candidates. Maximal degree in co-relation 93193. Up to 7673 conditions per place. [2024-06-03 20:12:29,433 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 648 selfloop transitions, 36 changer transitions 0/688 dead transitions. [2024-06-03 20:12:29,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 688 transitions, 13033 flow [2024-06-03 20:12:29,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 20:12:29,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-03 20:12:29,434 INFO L175 Difference]: Start difference. First operand has 482 places, 662 transitions, 11297 flow. Second operand 9 states and 150 transitions. [2024-06-03 20:12:29,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 688 transitions, 13033 flow [2024-06-03 20:12:35,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 688 transitions, 12936 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-03 20:12:35,113 INFO L231 Difference]: Finished difference. Result has 484 places, 663 transitions, 11344 flow [2024-06-03 20:12:35,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11202, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11344, PETRI_PLACES=484, PETRI_TRANSITIONS=663} [2024-06-03 20:12:35,113 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-03 20:12:35,113 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 663 transitions, 11344 flow [2024-06-03 20:12:35,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:35,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:35,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:35,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 20:12:35,114 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:35,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:35,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1164909172, now seen corresponding path program 13 times [2024-06-03 20:12:35,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:35,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913228629] [2024-06-03 20:12:35,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:35,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:36,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:36,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913228629] [2024-06-03 20:12:36,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913228629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:36,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:36,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:12:36,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738514708] [2024-06-03 20:12:36,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:36,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:12:36,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:36,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:12:36,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:12:36,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:12:36,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 663 transitions, 11344 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:36,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:36,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:12:36,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:39,188 INFO L124 PetriNetUnfolderBase]: 5179/8100 cut-off events. [2024-06-03 20:12:39,189 INFO L125 PetriNetUnfolderBase]: For 1384841/1384841 co-relation queries the response was YES. [2024-06-03 20:12:39,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92784 conditions, 8100 events. 5179/8100 cut-off events. For 1384841/1384841 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 50616 event pairs, 1172 based on Foata normal form. 2/8102 useless extension candidates. Maximal degree in co-relation 92563. Up to 7825 conditions per place. [2024-06-03 20:12:39,359 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 651 selfloop transitions, 27 changer transitions 0/682 dead transitions. [2024-06-03 20:12:39,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 682 transitions, 12870 flow [2024-06-03 20:12:39,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:12:39,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:12:39,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-03 20:12:39,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-03 20:12:39,361 INFO L175 Difference]: Start difference. First operand has 484 places, 663 transitions, 11344 flow. Second operand 9 states and 140 transitions. [2024-06-03 20:12:39,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 682 transitions, 12870 flow [2024-06-03 20:12:44,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 682 transitions, 12754 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 20:12:44,483 INFO L231 Difference]: Finished difference. Result has 486 places, 666 transitions, 11413 flow [2024-06-03 20:12:44,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11230, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11413, PETRI_PLACES=486, PETRI_TRANSITIONS=666} [2024-06-03 20:12:44,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 444 predicate places. [2024-06-03 20:12:44,484 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 666 transitions, 11413 flow [2024-06-03 20:12:44,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:12:44,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:12:44,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:12:44,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 20:12:44,485 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:12:44,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:12:44,485 INFO L85 PathProgramCache]: Analyzing trace with hash -480417038, now seen corresponding path program 1 times [2024-06-03 20:12:44,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:12:44,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221561797] [2024-06-03 20:12:44,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:12:44,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:12:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:12:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:12:45,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:12:45,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221561797] [2024-06-03 20:12:45,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221561797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:12:45,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:12:45,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:12:45,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031124293] [2024-06-03 20:12:45,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:12:45,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:12:45,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:12:45,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:12:45,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:12:45,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-03 20:12:45,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 666 transitions, 11413 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-03 20:12:45,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:12:45,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-03 20:12:45,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:12:48,096 INFO L124 PetriNetUnfolderBase]: 5253/8212 cut-off events. [2024-06-03 20:12:48,096 INFO L125 PetriNetUnfolderBase]: For 1504526/1504526 co-relation queries the response was YES. [2024-06-03 20:12:48,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95458 conditions, 8212 events. 5253/8212 cut-off events. For 1504526/1504526 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 51191 event pairs, 1078 based on Foata normal form. 8/8219 useless extension candidates. Maximal degree in co-relation 95236. Up to 7791 conditions per place. [2024-06-03 20:12:48,441 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 667 selfloop transitions, 27 changer transitions 0/698 dead transitions. [2024-06-03 20:12:48,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 698 transitions, 13459 flow [2024-06-03 20:12:48,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:12:48,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:12:48,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 20:12:48,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-03 20:12:48,443 INFO L175 Difference]: Start difference. First operand has 486 places, 666 transitions, 11413 flow. Second operand 8 states and 142 transitions. [2024-06-03 20:12:48,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 698 transitions, 13459 flow