./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.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/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 15:41:09,200 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 15:41:09,248 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 15:41:09,251 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 15:41:09,251 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 15:41:09,264 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 15:41:09,265 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 15:41:09,265 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 15:41:09,266 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 15:41:09,266 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 15:41:09,266 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 15:41:09,266 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 15:41:09,267 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 15:41:09,267 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 15:41:09,267 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 15:41:09,268 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 15:41:09,268 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 15:41:09,268 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 15:41:09,268 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 15:41:09,269 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 15:41:09,269 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 15:41:09,269 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 15:41:09,269 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 15:41:09,269 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 15:41:09,270 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 15:41:09,270 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 15:41:09,270 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 15:41:09,270 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 15:41:09,270 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 15:41:09,271 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 15:41:09,271 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 15:41:09,271 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 15:41:09,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:41:09,271 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 15:41:09,272 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 15:41:09,272 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 15:41:09,272 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 15:41:09,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 15:41:09,272 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 15:41:09,272 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 15:41:09,273 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 15:41:09,273 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 15:41:09,273 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 15:41:09,273 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 15:41:09,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 15:41:09,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 15:41:09,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 15:41:09,440 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 15:41:09,440 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 15:41:09,441 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-04 15:41:09,594 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 15:41:09,594 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 15:41:09,595 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-04 15:41:10,624 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 15:41:10,856 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 15:41:10,857 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-04 15:41:10,868 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edcc47062/1622f8d52e97428eaf1c0be5325ed6b2/FLAG0a219d1c4 [2024-06-04 15:41:10,878 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edcc47062/1622f8d52e97428eaf1c0be5325ed6b2 [2024-06-04 15:41:10,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 15:41:10,880 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 15:41:10,881 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 15:41:10,881 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 15:41:10,889 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 15:41:10,889 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:41:09" (1/2) ... [2024-06-04 15:41:10,890 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fcc61b8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:41:10, skipping insertion in model container [2024-06-04 15:41:10,891 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:41:09" (1/2) ... [2024-06-04 15:41:10,892 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3f269cd8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:41:10, skipping insertion in model container [2024-06-04 15:41:10,892 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:41:10" (2/2) ... [2024-06-04 15:41:10,892 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fcc61b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:41:10, skipping insertion in model container [2024-06-04 15:41:10,893 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:41:10" (2/2) ... [2024-06-04 15:41:10,894 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 15:41:10,974 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 15:41:10,975 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] (((((((((((((((((! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-04 15:41:10,975 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-04 15:41:10,976 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] (((((((((((((((((! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-04 15:41:10,976 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 15:41:10,976 INFO L106 edCorrectnessWitness]: ghost_update [L855-L855] multithreaded = 1; [2024-06-04 15:41:11,014 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 15:41:11,306 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:41:11,322 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 15:41:11,484 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:41:11,523 INFO L206 MainTranslator]: Completed translation [2024-06-04 15:41:11,523 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:41:11 WrapperNode [2024-06-04 15:41:11,523 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 15:41:11,524 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 15:41:11,525 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 15:41:11,525 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 15:41:11,530 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:41:11" (1/1) ... [2024-06-04 15:41:11,559 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:41:11" (1/1) ... [2024-06-04 15:41:11,593 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-04 15:41:11,594 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 15:41:11,594 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 15:41:11,594 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 15:41:11,595 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 15:41:11,603 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:41:11" (1/1) ... [2024-06-04 15:41:11,603 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:41:11" (1/1) ... [2024-06-04 15:41:11,617 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:41:11" (1/1) ... [2024-06-04 15:41:11,634 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-04 15:41:11,634 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:41:11" (1/1) ... [2024-06-04 15:41:11,634 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:41:11" (1/1) ... [2024-06-04 15:41:11,642 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:41:11" (1/1) ... [2024-06-04 15:41:11,645 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:41:11" (1/1) ... [2024-06-04 15:41:11,660 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:41:11" (1/1) ... [2024-06-04 15:41:11,662 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:41:11" (1/1) ... [2024-06-04 15:41:11,666 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 15:41:11,667 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 15:41:11,667 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 15:41:11,667 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 15:41:11,668 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:41:11" (1/1) ... [2024-06-04 15:41:11,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:41:11,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 15:41:11,702 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-04 15:41:11,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-04 15:41:11,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 15:41:11,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 15:41:11,727 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 15:41:11,727 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 15:41:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 15:41:11,728 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 15:41:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 15:41:11,728 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 15:41:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 15:41:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 15:41:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 15:41:11,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 15:41:11,730 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 15:41:11,830 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 15:41:11,831 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 15:41:12,252 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 15:41:12,253 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 15:41:12,404 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 15:41:12,404 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 15:41:12,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:41:12 BoogieIcfgContainer [2024-06-04 15:41:12,405 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 15:41:12,406 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 15:41:12,406 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 15:41:12,408 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 15:41:12,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:41:09" (1/4) ... [2024-06-04 15:41:12,409 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ae1ce7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:41:12, skipping insertion in model container [2024-06-04 15:41:12,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 03:41:10" (2/4) ... [2024-06-04 15:41:12,410 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ae1ce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:41:12, skipping insertion in model container [2024-06-04 15:41:12,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:41:11" (3/4) ... [2024-06-04 15:41:12,410 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ae1ce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:41:12, skipping insertion in model container [2024-06-04 15:41:12,411 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:41:12" (4/4) ... [2024-06-04 15:41:12,411 INFO L112 eAbstractionObserver]: Analyzing ICFG safe023_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-04 15:41:12,424 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 15:41:12,425 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 15:41:12,425 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 15:41:12,488 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 15:41:12,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 15:41:12,544 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-04 15:41:12,545 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:41:12,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 15:41:12,547 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 15:41:12,550 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-04 15:41:12,561 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 15:41:12,567 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;@12bb9d2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 15:41:12,567 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 15:41:12,572 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 15:41:12,572 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-04 15:41:12,572 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:41:12,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:12,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 15:41:12,573 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)] === [2024-06-04 15:41:12,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:12,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1004483788, now seen corresponding path program 1 times [2024-06-04 15:41:12,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:12,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378172795] [2024-06-04 15:41:12,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:12,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:13,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:13,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:13,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378172795] [2024-06-04 15:41:13,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378172795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:13,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:13,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 15:41:13,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611467520] [2024-06-04 15:41:13,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:13,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 15:41:13,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:13,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 15:41:13,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 15:41:13,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:41:13,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:13,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:13,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:41:13,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:14,045 INFO L124 PetriNetUnfolderBase]: 1656/2484 cut-off events. [2024-06-04 15:41:14,046 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-06-04 15:41:14,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5069 conditions, 2484 events. 1656/2484 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11839 event pairs, 955 based on Foata normal form. 3/2438 useless extension candidates. Maximal degree in co-relation 5054. Up to 2464 conditions per place. [2024-06-04 15:41:14,064 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 37 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-04 15:41:14,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 187 flow [2024-06-04 15:41:14,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 15:41:14,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 15:41:14,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-04 15:41:14,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 15:41:14,075 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-04 15:41:14,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 187 flow [2024-06-04 15:41:14,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 15:41:14,081 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-04 15:41:14,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-04 15:41:14,086 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-04 15:41:14,086 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-04 15:41:14,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:14,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:14,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:14,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 15:41:14,087 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)] === [2024-06-04 15:41:14,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:14,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1058700245, now seen corresponding path program 1 times [2024-06-04 15:41:14,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:14,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830257203] [2024-06-04 15:41:14,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:14,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:14,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:14,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:14,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830257203] [2024-06-04 15:41:14,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830257203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:14,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:14,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 15:41:14,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740979995] [2024-06-04 15:41:14,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:14,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 15:41:14,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:14,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 15:41:14,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 15:41:14,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:41:14,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:14,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:14,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:41:14,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:15,054 INFO L124 PetriNetUnfolderBase]: 1644/2466 cut-off events. [2024-06-04 15:41:15,055 INFO L125 PetriNetUnfolderBase]: For 358/358 co-relation queries the response was YES. [2024-06-04 15:41:15,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5667 conditions, 2466 events. 1644/2466 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11350 event pairs, 941 based on Foata normal form. 6/2471 useless extension candidates. Maximal degree in co-relation 5652. Up to 2422 conditions per place. [2024-06-04 15:41:15,069 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-04 15:41:15,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 266 flow [2024-06-04 15:41:15,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 15:41:15,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 15:41:15,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-04 15:41:15,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-04 15:41:15,073 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 89 transitions. [2024-06-04 15:41:15,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 266 flow [2024-06-04 15:41:15,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 15:41:15,077 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 154 flow [2024-06-04 15:41:15,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, 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=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-06-04 15:41:15,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-04 15:41:15,078 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 154 flow [2024-06-04 15:41:15,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:15,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:15,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:15,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 15:41:15,081 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:15,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:15,082 INFO L85 PathProgramCache]: Analyzing trace with hash 496336778, now seen corresponding path program 1 times [2024-06-04 15:41:15,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:15,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706769158] [2024-06-04 15:41:15,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:15,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:16,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:16,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706769158] [2024-06-04 15:41:16,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706769158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:16,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:16,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 15:41:16,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918677234] [2024-06-04 15:41:16,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:16,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 15:41:16,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:16,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 15:41:16,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 15:41:16,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:41:16,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:16,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:16,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:41:16,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:16,830 INFO L124 PetriNetUnfolderBase]: 1632/2448 cut-off events. [2024-06-04 15:41:16,831 INFO L125 PetriNetUnfolderBase]: For 1179/1187 co-relation queries the response was YES. [2024-06-04 15:41:16,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6249 conditions, 2448 events. 1632/2448 cut-off events. For 1179/1187 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11325 event pairs, 691 based on Foata normal form. 12/2459 useless extension candidates. Maximal degree in co-relation 6231. Up to 2374 conditions per place. [2024-06-04 15:41:16,843 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2024-06-04 15:41:16,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 68 transitions, 352 flow [2024-06-04 15:41:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:41:16,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:41:16,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-06-04 15:41:16,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190476190476191 [2024-06-04 15:41:16,845 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 154 flow. Second operand 5 states and 109 transitions. [2024-06-04 15:41:16,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 68 transitions, 352 flow [2024-06-04 15:41:16,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 350 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-04 15:41:16,847 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 200 flow [2024-06-04 15:41:16,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-06-04 15:41:16,848 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-04 15:41:16,848 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 200 flow [2024-06-04 15:41:16,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:16,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:16,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:16,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 15:41:16,849 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)] === [2024-06-04 15:41:16,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:16,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1943845815, now seen corresponding path program 1 times [2024-06-04 15:41:16,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:16,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111709442] [2024-06-04 15:41:16,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:16,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:17,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:17,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111709442] [2024-06-04 15:41:17,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111709442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:17,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:17,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:41:17,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098567789] [2024-06-04 15:41:17,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:17,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:41:17,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:17,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:41:17,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:41:17,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:41:17,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:17,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:17,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:41:17,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:17,941 INFO L124 PetriNetUnfolderBase]: 1637/2455 cut-off events. [2024-06-04 15:41:17,941 INFO L125 PetriNetUnfolderBase]: For 2150/2158 co-relation queries the response was YES. [2024-06-04 15:41:17,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6885 conditions, 2455 events. 1637/2455 cut-off events. For 2150/2158 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11211 event pairs, 881 based on Foata normal form. 10/2464 useless extension candidates. Maximal degree in co-relation 6864. Up to 2426 conditions per place. [2024-06-04 15:41:17,953 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 49 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-04 15:41:17,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 61 transitions, 360 flow [2024-06-04 15:41:17,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:41:17,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:41:17,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-04 15:41:17,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 15:41:17,955 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 200 flow. Second operand 5 states and 90 transitions. [2024-06-04 15:41:17,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 61 transitions, 360 flow [2024-06-04 15:41:17,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 61 transitions, 338 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-04 15:41:17,958 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 218 flow [2024-06-04 15:41:17,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-04 15:41:17,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-04 15:41:17,959 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 218 flow [2024-06-04 15:41:17,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:17,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:17,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:17,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 15:41:17,960 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:17,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:17,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1490748477, now seen corresponding path program 1 times [2024-06-04 15:41:17,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:17,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054165781] [2024-06-04 15:41:17,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:17,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:19,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:19,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054165781] [2024-06-04 15:41:19,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054165781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:19,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:19,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:41:19,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418274557] [2024-06-04 15:41:19,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:19,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:41:19,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:19,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:41:19,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:41:19,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 15:41:19,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 218 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:19,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:19,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 15:41:19,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:20,153 INFO L124 PetriNetUnfolderBase]: 1628/2440 cut-off events. [2024-06-04 15:41:20,153 INFO L125 PetriNetUnfolderBase]: For 2998/3006 co-relation queries the response was YES. [2024-06-04 15:41:20,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7380 conditions, 2440 events. 1628/2440 cut-off events. For 2998/3006 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11102 event pairs, 541 based on Foata normal form. 12/2451 useless extension candidates. Maximal degree in co-relation 7357. Up to 2336 conditions per place. [2024-06-04 15:41:20,168 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 61 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-04 15:41:20,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 77 transitions, 440 flow [2024-06-04 15:41:20,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:41:20,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:41:20,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-04 15:41:20,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-04 15:41:20,172 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 218 flow. Second operand 6 states and 124 transitions. [2024-06-04 15:41:20,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 77 transitions, 440 flow [2024-06-04 15:41:20,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 77 transitions, 424 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-04 15:41:20,179 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 243 flow [2024-06-04 15:41:20,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-04 15:41:20,181 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-04 15:41:20,181 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 243 flow [2024-06-04 15:41:20,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:20,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:20,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:20,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 15:41:20,183 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)] === [2024-06-04 15:41:20,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:20,183 INFO L85 PathProgramCache]: Analyzing trace with hash -129676794, now seen corresponding path program 1 times [2024-06-04 15:41:20,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:20,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964154435] [2024-06-04 15:41:20,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:20,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:20,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:20,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964154435] [2024-06-04 15:41:20,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964154435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:20,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:20,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:41:20,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263235275] [2024-06-04 15:41:20,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:20,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:41:20,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:20,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:41:20,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:41:20,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:41:20,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 243 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:20,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:20,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:41:20,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:21,359 INFO L124 PetriNetUnfolderBase]: 1897/2824 cut-off events. [2024-06-04 15:41:21,359 INFO L125 PetriNetUnfolderBase]: For 4861/4861 co-relation queries the response was YES. [2024-06-04 15:41:21,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8913 conditions, 2824 events. 1897/2824 cut-off events. For 4861/4861 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12882 event pairs, 1022 based on Foata normal form. 2/2826 useless extension candidates. Maximal degree in co-relation 8890. Up to 2793 conditions per place. [2024-06-04 15:41:21,379 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-06-04 15:41:21,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 464 flow [2024-06-04 15:41:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:41:21,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:41:21,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-04 15:41:21,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-04 15:41:21,381 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 243 flow. Second operand 6 states and 97 transitions. [2024-06-04 15:41:21,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 464 flow [2024-06-04 15:41:21,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 73 transitions, 429 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 15:41:21,386 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 303 flow [2024-06-04 15:41:21,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=303, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-06-04 15:41:21,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-04 15:41:21,388 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 303 flow [2024-06-04 15:41:21,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:21,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:21,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:21,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 15:41:21,389 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:21,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:21,389 INFO L85 PathProgramCache]: Analyzing trace with hash -287765952, now seen corresponding path program 1 times [2024-06-04 15:41:21,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:21,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169666770] [2024-06-04 15:41:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:21,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:21,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:21,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169666770] [2024-06-04 15:41:21,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169666770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:21,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:21,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:41:21,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050988] [2024-06-04 15:41:21,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:21,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:41:21,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:21,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:41:21,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:41:22,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:41:22,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 303 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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) [2024-06-04 15:41:22,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:22,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:41:22,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:22,529 INFO L124 PetriNetUnfolderBase]: 1827/2736 cut-off events. [2024-06-04 15:41:22,529 INFO L125 PetriNetUnfolderBase]: For 6668/6710 co-relation queries the response was YES. [2024-06-04 15:41:22,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9339 conditions, 2736 events. 1827/2736 cut-off events. For 6668/6710 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12551 event pairs, 801 based on Foata normal form. 15/2741 useless extension candidates. Maximal degree in co-relation 9312. Up to 2659 conditions per place. [2024-06-04 15:41:22,544 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 60 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2024-06-04 15:41:22,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 531 flow [2024-06-04 15:41:22,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:41:22,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:41:22,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-04 15:41:22,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-04 15:41:22,545 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 303 flow. Second operand 6 states and 107 transitions. [2024-06-04 15:41:22,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 531 flow [2024-06-04 15:41:22,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 83 transitions, 525 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-04 15:41:22,551 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 378 flow [2024-06-04 15:41:22,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=378, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-04 15:41:22,552 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-04 15:41:22,552 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 378 flow [2024-06-04 15:41:22,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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) [2024-06-04 15:41:22,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:22,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:22,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 15:41:22,553 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)] === [2024-06-04 15:41:22,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:22,553 INFO L85 PathProgramCache]: Analyzing trace with hash 274979112, now seen corresponding path program 2 times [2024-06-04 15:41:22,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:22,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975175771] [2024-06-04 15:41:22,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:22,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:23,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:23,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975175771] [2024-06-04 15:41:23,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975175771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:23,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:23,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:41:23,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663682752] [2024-06-04 15:41:23,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:23,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:41:23,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:23,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:41:23,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:41:23,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:41:23,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 378 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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) [2024-06-04 15:41:23,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:23,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:41:23,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:23,739 INFO L124 PetriNetUnfolderBase]: 1871/2802 cut-off events. [2024-06-04 15:41:23,739 INFO L125 PetriNetUnfolderBase]: For 9205/9248 co-relation queries the response was YES. [2024-06-04 15:41:23,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10527 conditions, 2802 events. 1871/2802 cut-off events. For 9205/9248 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12907 event pairs, 782 based on Foata normal form. 18/2808 useless extension candidates. Maximal degree in co-relation 10496. Up to 2677 conditions per place. [2024-06-04 15:41:23,753 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 61 selfloop transitions, 23 changer transitions 0/91 dead transitions. [2024-06-04 15:41:23,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 91 transitions, 680 flow [2024-06-04 15:41:23,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:41:23,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:41:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-04 15:41:23,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-04 15:41:23,755 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 378 flow. Second operand 6 states and 109 transitions. [2024-06-04 15:41:23,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 91 transitions, 680 flow [2024-06-04 15:41:23,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 91 transitions, 657 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-04 15:41:23,760 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 490 flow [2024-06-04 15:41:23,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=490, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-04 15:41:23,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-04 15:41:23,761 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 490 flow [2024-06-04 15:41:23,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 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) [2024-06-04 15:41:23,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:23,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:23,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 15:41:23,762 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)] === [2024-06-04 15:41:23,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:23,762 INFO L85 PathProgramCache]: Analyzing trace with hash 274988040, now seen corresponding path program 1 times [2024-06-04 15:41:23,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:23,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825978128] [2024-06-04 15:41:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:23,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:24,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:24,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825978128] [2024-06-04 15:41:24,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825978128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:24,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:24,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:41:24,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706766490] [2024-06-04 15:41:24,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:24,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:41:24,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:24,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:41:24,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:41:24,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:41:24,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 490 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:24,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:24,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:41:24,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:25,198 INFO L124 PetriNetUnfolderBase]: 1932/2875 cut-off events. [2024-06-04 15:41:25,198 INFO L125 PetriNetUnfolderBase]: For 11634/11634 co-relation queries the response was YES. [2024-06-04 15:41:25,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11244 conditions, 2875 events. 1932/2875 cut-off events. For 11634/11634 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13219 event pairs, 857 based on Foata normal form. 2/2877 useless extension candidates. Maximal degree in co-relation 11210. Up to 2835 conditions per place. [2024-06-04 15:41:25,211 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 77 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-06-04 15:41:25,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 94 transitions, 734 flow [2024-06-04 15:41:25,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:41:25,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:41:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-04 15:41:25,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-04 15:41:25,213 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 490 flow. Second operand 7 states and 111 transitions. [2024-06-04 15:41:25,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 94 transitions, 734 flow [2024-06-04 15:41:25,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 94 transitions, 690 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-04 15:41:25,222 INFO L231 Difference]: Finished difference. Result has 75 places, 75 transitions, 502 flow [2024-06-04 15:41:25,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=502, PETRI_PLACES=75, PETRI_TRANSITIONS=75} [2024-06-04 15:41:25,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-04 15:41:25,224 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 75 transitions, 502 flow [2024-06-04 15:41:25,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:25,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:25,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:25,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 15:41:25,224 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)] === [2024-06-04 15:41:25,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:25,225 INFO L85 PathProgramCache]: Analyzing trace with hash 785936290, now seen corresponding path program 1 times [2024-06-04 15:41:25,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:25,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012568124] [2024-06-04 15:41:25,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:25,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:26,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:26,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012568124] [2024-06-04 15:41:26,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012568124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:26,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:26,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:41:26,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034948712] [2024-06-04 15:41:26,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:26,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:41:26,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:26,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:41:26,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:41:26,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:41:26,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 75 transitions, 502 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:26,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:26,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:41:26,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:26,698 INFO L124 PetriNetUnfolderBase]: 1824/2735 cut-off events. [2024-06-04 15:41:26,699 INFO L125 PetriNetUnfolderBase]: For 14654/14700 co-relation queries the response was YES. [2024-06-04 15:41:26,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11362 conditions, 2735 events. 1824/2735 cut-off events. For 14654/14700 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12771 event pairs, 752 based on Foata normal form. 33/2712 useless extension candidates. Maximal degree in co-relation 11327. Up to 2608 conditions per place. [2024-06-04 15:41:26,711 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 69 selfloop transitions, 18 changer transitions 0/95 dead transitions. [2024-06-04 15:41:26,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 95 transitions, 737 flow [2024-06-04 15:41:26,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:41:26,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:41:26,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-04 15:41:26,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-04 15:41:26,713 INFO L175 Difference]: Start difference. First operand has 75 places, 75 transitions, 502 flow. Second operand 6 states and 107 transitions. [2024-06-04 15:41:26,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 95 transitions, 737 flow [2024-06-04 15:41:26,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 95 transitions, 695 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 15:41:26,722 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 521 flow [2024-06-04 15:41:26,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=521, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2024-06-04 15:41:26,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-04 15:41:26,724 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 521 flow [2024-06-04 15:41:26,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:26,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:26,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:26,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 15:41:26,725 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)] === [2024-06-04 15:41:26,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:26,725 INFO L85 PathProgramCache]: Analyzing trace with hash -330808593, now seen corresponding path program 1 times [2024-06-04 15:41:26,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:26,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631658373] [2024-06-04 15:41:26,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:26,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:27,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:27,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631658373] [2024-06-04 15:41:27,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631658373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:27,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:27,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:41:27,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539594535] [2024-06-04 15:41:27,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:27,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:41:27,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:27,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:41:27,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:41:27,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:41:27,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 521 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:27,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:27,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:41:27,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:27,915 INFO L124 PetriNetUnfolderBase]: 1946/2898 cut-off events. [2024-06-04 15:41:27,915 INFO L125 PetriNetUnfolderBase]: For 15739/15743 co-relation queries the response was YES. [2024-06-04 15:41:27,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12057 conditions, 2898 events. 1946/2898 cut-off events. For 15739/15743 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13165 event pairs, 829 based on Foata normal form. 8/2906 useless extension candidates. Maximal degree in co-relation 12021. Up to 2812 conditions per place. [2024-06-04 15:41:27,931 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-06-04 15:41:27,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 112 transitions, 897 flow [2024-06-04 15:41:27,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:41:27,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:41:27,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-04 15:41:27,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-04 15:41:27,933 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 521 flow. Second operand 7 states and 117 transitions. [2024-06-04 15:41:27,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 112 transitions, 897 flow [2024-06-04 15:41:27,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 112 transitions, 861 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-04 15:41:27,943 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 655 flow [2024-06-04 15:41:27,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=655, PETRI_PLACES=82, PETRI_TRANSITIONS=88} [2024-06-04 15:41:27,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-04 15:41:27,944 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 655 flow [2024-06-04 15:41:27,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:27,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:27,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:27,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 15:41:27,945 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)] === [2024-06-04 15:41:27,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:27,945 INFO L85 PathProgramCache]: Analyzing trace with hash -65313883, now seen corresponding path program 2 times [2024-06-04 15:41:27,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:27,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139206263] [2024-06-04 15:41:27,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:27,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:28,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:28,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139206263] [2024-06-04 15:41:28,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139206263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:28,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:28,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:41:28,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499036802] [2024-06-04 15:41:28,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:28,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:41:28,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:28,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:41:28,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:41:28,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:41:28,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 88 transitions, 655 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:28,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:28,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:41:28,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:29,180 INFO L124 PetriNetUnfolderBase]: 1990/2964 cut-off events. [2024-06-04 15:41:29,180 INFO L125 PetriNetUnfolderBase]: For 19739/19747 co-relation queries the response was YES. [2024-06-04 15:41:29,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13023 conditions, 2964 events. 1990/2964 cut-off events. For 19739/19747 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13606 event pairs, 778 based on Foata normal form. 16/2980 useless extension candidates. Maximal degree in co-relation 12983. Up to 2699 conditions per place. [2024-06-04 15:41:29,195 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 89 selfloop transitions, 33 changer transitions 0/125 dead transitions. [2024-06-04 15:41:29,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 125 transitions, 1099 flow [2024-06-04 15:41:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:41:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:41:29,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-04 15:41:29,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-04 15:41:29,197 INFO L175 Difference]: Start difference. First operand has 82 places, 88 transitions, 655 flow. Second operand 7 states and 122 transitions. [2024-06-04 15:41:29,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 125 transitions, 1099 flow [2024-06-04 15:41:29,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 125 transitions, 1075 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-04 15:41:29,209 INFO L231 Difference]: Finished difference. Result has 89 places, 100 transitions, 822 flow [2024-06-04 15:41:29,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=822, PETRI_PLACES=89, PETRI_TRANSITIONS=100} [2024-06-04 15:41:29,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-04 15:41:29,210 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 100 transitions, 822 flow [2024-06-04 15:41:29,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:29,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:29,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:29,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 15:41:29,211 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)] === [2024-06-04 15:41:29,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:29,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1455836185, now seen corresponding path program 3 times [2024-06-04 15:41:29,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:29,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383654016] [2024-06-04 15:41:29,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:29,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:29,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:29,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383654016] [2024-06-04 15:41:29,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383654016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:29,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:29,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:41:29,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475028226] [2024-06-04 15:41:29,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:29,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:41:29,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:29,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:41:29,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:41:29,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:41:29,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 100 transitions, 822 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:29,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:29,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:41:29,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:30,411 INFO L124 PetriNetUnfolderBase]: 1996/2973 cut-off events. [2024-06-04 15:41:30,411 INFO L125 PetriNetUnfolderBase]: For 23756/23764 co-relation queries the response was YES. [2024-06-04 15:41:30,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14031 conditions, 2973 events. 1996/2973 cut-off events. For 23756/23764 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13625 event pairs, 785 based on Foata normal form. 12/2985 useless extension candidates. Maximal degree in co-relation 13987. Up to 2705 conditions per place. [2024-06-04 15:41:30,430 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 91 selfloop transitions, 35 changer transitions 0/129 dead transitions. [2024-06-04 15:41:30,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 129 transitions, 1235 flow [2024-06-04 15:41:30,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:41:30,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:41:30,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-04 15:41:30,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-04 15:41:30,432 INFO L175 Difference]: Start difference. First operand has 89 places, 100 transitions, 822 flow. Second operand 7 states and 123 transitions. [2024-06-04 15:41:30,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 129 transitions, 1235 flow [2024-06-04 15:41:30,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 129 transitions, 1193 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-04 15:41:30,448 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 901 flow [2024-06-04 15:41:30,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=901, PETRI_PLACES=94, PETRI_TRANSITIONS=104} [2024-06-04 15:41:30,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-04 15:41:30,449 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 901 flow [2024-06-04 15:41:30,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:30,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:30,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:30,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 15:41:30,450 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)] === [2024-06-04 15:41:30,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:30,450 INFO L85 PathProgramCache]: Analyzing trace with hash -65303963, now seen corresponding path program 1 times [2024-06-04 15:41:30,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:30,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314888844] [2024-06-04 15:41:30,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:30,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:31,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:31,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314888844] [2024-06-04 15:41:31,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314888844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:31,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:31,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:41:31,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801694432] [2024-06-04 15:41:31,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:31,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:41:31,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:31,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:41:31,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:41:31,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:41:31,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 901 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:31,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:31,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:41:31,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:31,934 INFO L124 PetriNetUnfolderBase]: 1988/2957 cut-off events. [2024-06-04 15:41:31,934 INFO L125 PetriNetUnfolderBase]: For 26142/26142 co-relation queries the response was YES. [2024-06-04 15:41:31,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14250 conditions, 2957 events. 1988/2957 cut-off events. For 26142/26142 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13497 event pairs, 783 based on Foata normal form. 4/2961 useless extension candidates. Maximal degree in co-relation 14204. Up to 2899 conditions per place. [2024-06-04 15:41:31,952 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 111 selfloop transitions, 16 changer transitions 0/130 dead transitions. [2024-06-04 15:41:31,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 130 transitions, 1231 flow [2024-06-04 15:41:31,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:41:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:41:31,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-04 15:41:31,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-04 15:41:31,955 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 901 flow. Second operand 8 states and 125 transitions. [2024-06-04 15:41:31,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 130 transitions, 1231 flow [2024-06-04 15:41:31,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 130 transitions, 1174 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-04 15:41:31,975 INFO L231 Difference]: Finished difference. Result has 99 places, 106 transitions, 903 flow [2024-06-04 15:41:31,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=903, PETRI_PLACES=99, PETRI_TRANSITIONS=106} [2024-06-04 15:41:31,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-04 15:41:31,976 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 106 transitions, 903 flow [2024-06-04 15:41:31,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:31,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:31,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:31,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 15:41:31,977 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:31,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:31,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2008575669, now seen corresponding path program 1 times [2024-06-04 15:41:31,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:31,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614630855] [2024-06-04 15:41:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:31,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:32,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:32,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614630855] [2024-06-04 15:41:32,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614630855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:32,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:32,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:41:32,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137417026] [2024-06-04 15:41:32,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:32,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:41:32,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:32,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:41:32,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:41:33,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:41:33,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 903 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:33,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:33,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:41:33,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:33,623 INFO L124 PetriNetUnfolderBase]: 1920/2878 cut-off events. [2024-06-04 15:41:33,623 INFO L125 PetriNetUnfolderBase]: For 31861/31945 co-relation queries the response was YES. [2024-06-04 15:41:33,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14445 conditions, 2878 events. 1920/2878 cut-off events. For 31861/31945 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13441 event pairs, 585 based on Foata normal form. 19/2833 useless extension candidates. Maximal degree in co-relation 14398. Up to 2698 conditions per place. [2024-06-04 15:41:33,636 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 97 selfloop transitions, 21 changer transitions 0/136 dead transitions. [2024-06-04 15:41:33,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 136 transitions, 1229 flow [2024-06-04 15:41:33,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:41:33,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:41:33,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-04 15:41:33,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 15:41:33,639 INFO L175 Difference]: Start difference. First operand has 99 places, 106 transitions, 903 flow. Second operand 7 states and 126 transitions. [2024-06-04 15:41:33,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 136 transitions, 1229 flow [2024-06-04 15:41:33,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 136 transitions, 1188 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 15:41:33,653 INFO L231 Difference]: Finished difference. Result has 100 places, 109 transitions, 940 flow [2024-06-04 15:41:33,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=940, PETRI_PLACES=100, PETRI_TRANSITIONS=109} [2024-06-04 15:41:33,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-04 15:41:33,654 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 109 transitions, 940 flow [2024-06-04 15:41:33,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:33,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:33,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:33,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 15:41:33,654 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:33,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:33,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2008580319, now seen corresponding path program 2 times [2024-06-04 15:41:33,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:33,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673149035] [2024-06-04 15:41:33,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:33,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:34,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:34,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673149035] [2024-06-04 15:41:34,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673149035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:34,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:34,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:41:34,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543594592] [2024-06-04 15:41:34,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:34,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:41:34,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:34,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:41:34,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:41:34,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:41:34,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 109 transitions, 940 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:34,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:34,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:41:34,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:35,425 INFO L124 PetriNetUnfolderBase]: 1940/2910 cut-off events. [2024-06-04 15:41:35,425 INFO L125 PetriNetUnfolderBase]: For 36459/36553 co-relation queries the response was YES. [2024-06-04 15:41:35,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15209 conditions, 2910 events. 1940/2910 cut-off events. For 36459/36553 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13573 event pairs, 580 based on Foata normal form. 26/2870 useless extension candidates. Maximal degree in co-relation 15161. Up to 2672 conditions per place. [2024-06-04 15:41:35,441 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 88 selfloop transitions, 32 changer transitions 0/138 dead transitions. [2024-06-04 15:41:35,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 138 transitions, 1274 flow [2024-06-04 15:41:35,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:41:35,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:41:35,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-04 15:41:35,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-04 15:41:35,443 INFO L175 Difference]: Start difference. First operand has 100 places, 109 transitions, 940 flow. Second operand 7 states and 127 transitions. [2024-06-04 15:41:35,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 138 transitions, 1274 flow [2024-06-04 15:41:35,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 138 transitions, 1220 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 15:41:35,461 INFO L231 Difference]: Finished difference. Result has 102 places, 112 transitions, 995 flow [2024-06-04 15:41:35,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=995, PETRI_PLACES=102, PETRI_TRANSITIONS=112} [2024-06-04 15:41:35,461 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-04 15:41:35,461 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 112 transitions, 995 flow [2024-06-04 15:41:35,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:35,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:35,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:35,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 15:41:35,462 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:35,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:35,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1665310171, now seen corresponding path program 1 times [2024-06-04 15:41:35,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:35,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937459913] [2024-06-04 15:41:35,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:35,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:35,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:36,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:36,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937459913] [2024-06-04 15:41:36,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937459913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:36,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:36,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:41:36,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947253233] [2024-06-04 15:41:36,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:36,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:41:36,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:36,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:41:36,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:41:36,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:41:36,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 112 transitions, 995 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:36,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:36,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:41:36,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:37,138 INFO L124 PetriNetUnfolderBase]: 2047/3042 cut-off events. [2024-06-04 15:41:37,138 INFO L125 PetriNetUnfolderBase]: For 37873/37873 co-relation queries the response was YES. [2024-06-04 15:41:37,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16084 conditions, 3042 events. 2047/3042 cut-off events. For 37873/37873 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13948 event pairs, 745 based on Foata normal form. 2/3044 useless extension candidates. Maximal degree in co-relation 16035. Up to 2940 conditions per place. [2024-06-04 15:41:37,153 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 114 selfloop transitions, 22 changer transitions 0/139 dead transitions. [2024-06-04 15:41:37,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 139 transitions, 1363 flow [2024-06-04 15:41:37,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:41:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:41:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-04 15:41:37,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-04 15:41:37,155 INFO L175 Difference]: Start difference. First operand has 102 places, 112 transitions, 995 flow. Second operand 7 states and 117 transitions. [2024-06-04 15:41:37,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 139 transitions, 1363 flow [2024-06-04 15:41:37,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 139 transitions, 1284 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 15:41:37,176 INFO L231 Difference]: Finished difference. Result has 104 places, 115 transitions, 1010 flow [2024-06-04 15:41:37,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1010, PETRI_PLACES=104, PETRI_TRANSITIONS=115} [2024-06-04 15:41:37,177 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-04 15:41:37,177 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 115 transitions, 1010 flow [2024-06-04 15:41:37,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:37,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:37,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:37,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 15:41:37,178 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:37,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:37,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1665130433, now seen corresponding path program 1 times [2024-06-04 15:41:37,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:37,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741646103] [2024-06-04 15:41:37,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:37,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:38,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:38,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741646103] [2024-06-04 15:41:38,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741646103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:38,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:38,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:41:38,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710119499] [2024-06-04 15:41:38,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:38,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:41:38,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:38,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:41:38,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:41:38,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:41:38,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 115 transitions, 1010 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:38,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:38,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:41:38,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:38,623 INFO L124 PetriNetUnfolderBase]: 2069/3076 cut-off events. [2024-06-04 15:41:38,623 INFO L125 PetriNetUnfolderBase]: For 42310/42318 co-relation queries the response was YES. [2024-06-04 15:41:38,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16519 conditions, 3076 events. 2069/3076 cut-off events. For 42310/42318 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14078 event pairs, 749 based on Foata normal form. 12/3088 useless extension candidates. Maximal degree in co-relation 16469. Up to 2967 conditions per place. [2024-06-04 15:41:38,641 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 124 selfloop transitions, 20 changer transitions 0/147 dead transitions. [2024-06-04 15:41:38,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 147 transitions, 1409 flow [2024-06-04 15:41:38,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:41:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:41:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-04 15:41:38,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-04 15:41:38,643 INFO L175 Difference]: Start difference. First operand has 104 places, 115 transitions, 1010 flow. Second operand 8 states and 132 transitions. [2024-06-04 15:41:38,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 147 transitions, 1409 flow [2024-06-04 15:41:38,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 147 transitions, 1369 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 15:41:38,668 INFO L231 Difference]: Finished difference. Result has 109 places, 118 transitions, 1057 flow [2024-06-04 15:41:38,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1057, PETRI_PLACES=109, PETRI_TRANSITIONS=118} [2024-06-04 15:41:38,669 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-04 15:41:38,669 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 118 transitions, 1057 flow [2024-06-04 15:41:38,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:38,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:38,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:38,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 15:41:38,670 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:38,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:38,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2033003225, now seen corresponding path program 2 times [2024-06-04 15:41:38,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:38,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726481184] [2024-06-04 15:41:38,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:38,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:39,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:39,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726481184] [2024-06-04 15:41:39,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726481184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:39,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:39,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:41:39,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782250541] [2024-06-04 15:41:39,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:39,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:41:39,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:39,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:41:39,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:41:39,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:41:39,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 118 transitions, 1057 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:39,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:39,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:41:39,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:40,029 INFO L124 PetriNetUnfolderBase]: 2059/3064 cut-off events. [2024-06-04 15:41:40,029 INFO L125 PetriNetUnfolderBase]: For 46292/46300 co-relation queries the response was YES. [2024-06-04 15:41:40,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16683 conditions, 3064 events. 2059/3064 cut-off events. For 46292/46300 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14094 event pairs, 746 based on Foata normal form. 12/3076 useless extension candidates. Maximal degree in co-relation 16632. Up to 2811 conditions per place. [2024-06-04 15:41:40,047 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 43 changer transitions 0/142 dead transitions. [2024-06-04 15:41:40,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 142 transitions, 1407 flow [2024-06-04 15:41:40,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:41:40,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:41:40,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-04 15:41:40,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 15:41:40,049 INFO L175 Difference]: Start difference. First operand has 109 places, 118 transitions, 1057 flow. Second operand 7 states and 119 transitions. [2024-06-04 15:41:40,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 142 transitions, 1407 flow [2024-06-04 15:41:40,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 142 transitions, 1349 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 15:41:40,075 INFO L231 Difference]: Finished difference. Result has 111 places, 120 transitions, 1137 flow [2024-06-04 15:41:40,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=999, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1137, PETRI_PLACES=111, PETRI_TRANSITIONS=120} [2024-06-04 15:41:40,075 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-04 15:41:40,075 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 120 transitions, 1137 flow [2024-06-04 15:41:40,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:40,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:40,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:40,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 15:41:40,076 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)] === [2024-06-04 15:41:40,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:40,077 INFO L85 PathProgramCache]: Analyzing trace with hash -2033010169, now seen corresponding path program 3 times [2024-06-04 15:41:40,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:40,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089701177] [2024-06-04 15:41:40,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:40,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:41,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:41,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089701177] [2024-06-04 15:41:41,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089701177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:41,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:41,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:41:41,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330337401] [2024-06-04 15:41:41,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:41,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:41:41,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:41,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:41:41,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:41:41,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:41:41,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 120 transitions, 1137 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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) [2024-06-04 15:41:41,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:41,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:41:41,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:41,818 INFO L124 PetriNetUnfolderBase]: 1957/2941 cut-off events. [2024-06-04 15:41:41,818 INFO L125 PetriNetUnfolderBase]: For 54166/54257 co-relation queries the response was YES. [2024-06-04 15:41:41,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16877 conditions, 2941 events. 1957/2941 cut-off events. For 54166/54257 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13808 event pairs, 571 based on Foata normal form. 25/2898 useless extension candidates. Maximal degree in co-relation 16824. Up to 2637 conditions per place. [2024-06-04 15:41:41,836 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 39 changer transitions 0/147 dead transitions. [2024-06-04 15:41:41,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 147 transitions, 1485 flow [2024-06-04 15:41:41,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:41:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:41:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-04 15:41:41,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-04 15:41:41,837 INFO L175 Difference]: Start difference. First operand has 111 places, 120 transitions, 1137 flow. Second operand 7 states and 127 transitions. [2024-06-04 15:41:41,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 147 transitions, 1485 flow [2024-06-04 15:41:41,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 147 transitions, 1361 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-04 15:41:41,872 INFO L231 Difference]: Finished difference. Result has 111 places, 123 transitions, 1140 flow [2024-06-04 15:41:41,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1140, PETRI_PLACES=111, PETRI_TRANSITIONS=123} [2024-06-04 15:41:41,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-04 15:41:41,873 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 123 transitions, 1140 flow [2024-06-04 15:41:41,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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) [2024-06-04 15:41:41,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:41,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:41,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 15:41:41,873 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)] === [2024-06-04 15:41:41,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:41,874 INFO L85 PathProgramCache]: Analyzing trace with hash -267683638, now seen corresponding path program 1 times [2024-06-04 15:41:41,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:41,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129095728] [2024-06-04 15:41:41,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:41,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:42,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:42,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129095728] [2024-06-04 15:41:42,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129095728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:42,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:42,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:42,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308165359] [2024-06-04 15:41:42,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:42,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:42,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:42,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:42,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:41:43,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:41:43,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 123 transitions, 1140 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:43,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:43,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:41:43,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:43,706 INFO L124 PetriNetUnfolderBase]: 2159/3218 cut-off events. [2024-06-04 15:41:43,706 INFO L125 PetriNetUnfolderBase]: For 50669/50671 co-relation queries the response was YES. [2024-06-04 15:41:43,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17962 conditions, 3218 events. 2159/3218 cut-off events. For 50669/50671 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14815 event pairs, 619 based on Foata normal form. 6/3224 useless extension candidates. Maximal degree in co-relation 17909. Up to 3037 conditions per place. [2024-06-04 15:41:43,727 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 147 selfloop transitions, 31 changer transitions 0/181 dead transitions. [2024-06-04 15:41:43,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 181 transitions, 1788 flow [2024-06-04 15:41:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:41:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:41:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-04 15:41:43,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 15:41:43,729 INFO L175 Difference]: Start difference. First operand has 111 places, 123 transitions, 1140 flow. Second operand 9 states and 153 transitions. [2024-06-04 15:41:43,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 181 transitions, 1788 flow [2024-06-04 15:41:43,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 181 transitions, 1667 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 15:41:43,764 INFO L231 Difference]: Finished difference. Result has 118 places, 145 transitions, 1326 flow [2024-06-04 15:41:43,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1326, PETRI_PLACES=118, PETRI_TRANSITIONS=145} [2024-06-04 15:41:43,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-04 15:41:43,765 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 145 transitions, 1326 flow [2024-06-04 15:41:43,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:43,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:43,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:43,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 15:41:43,765 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)] === [2024-06-04 15:41:43,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:43,766 INFO L85 PathProgramCache]: Analyzing trace with hash -85156338, now seen corresponding path program 2 times [2024-06-04 15:41:43,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:43,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959104485] [2024-06-04 15:41:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:43,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:44,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:44,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959104485] [2024-06-04 15:41:44,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959104485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:44,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:44,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:44,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240727568] [2024-06-04 15:41:44,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:44,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:44,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:44,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:44,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:41:44,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:41:44,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 145 transitions, 1326 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:44,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:44,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:41:44,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:45,578 INFO L124 PetriNetUnfolderBase]: 2181/3250 cut-off events. [2024-06-04 15:41:45,578 INFO L125 PetriNetUnfolderBase]: For 56154/56158 co-relation queries the response was YES. [2024-06-04 15:41:45,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18722 conditions, 3250 events. 2181/3250 cut-off events. For 56154/56158 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14929 event pairs, 598 based on Foata normal form. 8/3258 useless extension candidates. Maximal degree in co-relation 18665. Up to 3013 conditions per place. [2024-06-04 15:41:45,596 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 144 selfloop transitions, 36 changer transitions 0/183 dead transitions. [2024-06-04 15:41:45,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 183 transitions, 1844 flow [2024-06-04 15:41:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:41:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:41:45,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 15:41:45,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-04 15:41:45,597 INFO L175 Difference]: Start difference. First operand has 118 places, 145 transitions, 1326 flow. Second operand 8 states and 135 transitions. [2024-06-04 15:41:45,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 183 transitions, 1844 flow [2024-06-04 15:41:45,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 183 transitions, 1794 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-04 15:41:45,639 INFO L231 Difference]: Finished difference. Result has 125 places, 151 transitions, 1437 flow [2024-06-04 15:41:45,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1437, PETRI_PLACES=125, PETRI_TRANSITIONS=151} [2024-06-04 15:41:45,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-04 15:41:45,640 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 151 transitions, 1437 flow [2024-06-04 15:41:45,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:45,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:45,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:45,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 15:41:45,640 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)] === [2024-06-04 15:41:45,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:45,641 INFO L85 PathProgramCache]: Analyzing trace with hash 2136449072, now seen corresponding path program 3 times [2024-06-04 15:41:45,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:45,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748621301] [2024-06-04 15:41:45,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:45,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:46,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:46,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748621301] [2024-06-04 15:41:46,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748621301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:46,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:46,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:46,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710475286] [2024-06-04 15:41:46,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:46,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:46,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:46,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:46,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:41:46,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:41:46,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 151 transitions, 1437 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:46,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:46,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:41:46,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:47,493 INFO L124 PetriNetUnfolderBase]: 2235/3329 cut-off events. [2024-06-04 15:41:47,494 INFO L125 PetriNetUnfolderBase]: For 64069/64069 co-relation queries the response was YES. [2024-06-04 15:41:47,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19986 conditions, 3329 events. 2235/3329 cut-off events. For 64069/64069 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15329 event pairs, 594 based on Foata normal form. 4/3333 useless extension candidates. Maximal degree in co-relation 19926. Up to 2947 conditions per place. [2024-06-04 15:41:47,516 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 138 selfloop transitions, 50 changer transitions 0/191 dead transitions. [2024-06-04 15:41:47,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 191 transitions, 2081 flow [2024-06-04 15:41:47,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:41:47,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:41:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 15:41:47,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 15:41:47,517 INFO L175 Difference]: Start difference. First operand has 125 places, 151 transitions, 1437 flow. Second operand 8 states and 140 transitions. [2024-06-04 15:41:47,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 191 transitions, 2081 flow [2024-06-04 15:41:47,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 191 transitions, 2006 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-04 15:41:47,572 INFO L231 Difference]: Finished difference. Result has 131 places, 159 transitions, 1585 flow [2024-06-04 15:41:47,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1585, PETRI_PLACES=131, PETRI_TRANSITIONS=159} [2024-06-04 15:41:47,572 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-04 15:41:47,572 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 159 transitions, 1585 flow [2024-06-04 15:41:47,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:47,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:47,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:47,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 15:41:47,573 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)] === [2024-06-04 15:41:47,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:47,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1997926502, now seen corresponding path program 4 times [2024-06-04 15:41:47,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:47,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602730364] [2024-06-04 15:41:47,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:47,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:48,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:48,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602730364] [2024-06-04 15:41:48,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602730364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:48,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:48,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:48,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648102103] [2024-06-04 15:41:48,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:48,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:48,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:48,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:48,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:41:48,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:41:48,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 159 transitions, 1585 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:48,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:48,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:41:48,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:49,355 INFO L124 PetriNetUnfolderBase]: 2225/3315 cut-off events. [2024-06-04 15:41:49,355 INFO L125 PetriNetUnfolderBase]: For 64018/64018 co-relation queries the response was YES. [2024-06-04 15:41:49,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20083 conditions, 3315 events. 2225/3315 cut-off events. For 64018/64018 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15293 event pairs, 587 based on Foata normal form. 4/3319 useless extension candidates. Maximal degree in co-relation 20020. Up to 2939 conditions per place. [2024-06-04 15:41:49,375 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 135 selfloop transitions, 53 changer transitions 0/191 dead transitions. [2024-06-04 15:41:49,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 191 transitions, 2068 flow [2024-06-04 15:41:49,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:41:49,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:41:49,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 15:41:49,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-04 15:41:49,376 INFO L175 Difference]: Start difference. First operand has 131 places, 159 transitions, 1585 flow. Second operand 8 states and 138 transitions. [2024-06-04 15:41:49,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 191 transitions, 2068 flow [2024-06-04 15:41:49,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 191 transitions, 1916 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-04 15:41:49,425 INFO L231 Difference]: Finished difference. Result has 134 places, 160 transitions, 1563 flow [2024-06-04 15:41:49,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1443, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1563, PETRI_PLACES=134, PETRI_TRANSITIONS=160} [2024-06-04 15:41:49,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-04 15:41:49,426 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 160 transitions, 1563 flow [2024-06-04 15:41:49,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:49,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:49,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:49,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 15:41:49,426 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)] === [2024-06-04 15:41:49,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:49,427 INFO L85 PathProgramCache]: Analyzing trace with hash 2142026778, now seen corresponding path program 1 times [2024-06-04 15:41:49,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:49,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609420686] [2024-06-04 15:41:49,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:49,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:50,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:50,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609420686] [2024-06-04 15:41:50,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609420686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:50,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:50,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:41:50,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444584381] [2024-06-04 15:41:50,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:50,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:41:50,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:50,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:41:50,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:41:50,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:41:50,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 160 transitions, 1563 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-04 15:41:50,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:50,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:41:50,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:50,959 INFO L124 PetriNetUnfolderBase]: 2259/3372 cut-off events. [2024-06-04 15:41:50,960 INFO L125 PetriNetUnfolderBase]: For 69605/69617 co-relation queries the response was YES. [2024-06-04 15:41:50,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20376 conditions, 3372 events. 2259/3372 cut-off events. For 69605/69617 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15667 event pairs, 683 based on Foata normal form. 20/3392 useless extension candidates. Maximal degree in co-relation 20312. Up to 3011 conditions per place. [2024-06-04 15:41:50,983 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 137 selfloop transitions, 52 changer transitions 0/192 dead transitions. [2024-06-04 15:41:50,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 192 transitions, 2065 flow [2024-06-04 15:41:50,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:41:50,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:41:50,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 15:41:50,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-04 15:41:50,993 INFO L175 Difference]: Start difference. First operand has 134 places, 160 transitions, 1563 flow. Second operand 8 states and 135 transitions. [2024-06-04 15:41:50,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 192 transitions, 2065 flow [2024-06-04 15:41:51,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 192 transitions, 1982 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-04 15:41:51,047 INFO L231 Difference]: Finished difference. Result has 137 places, 162 transitions, 1623 flow [2024-06-04 15:41:51,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1623, PETRI_PLACES=137, PETRI_TRANSITIONS=162} [2024-06-04 15:41:51,047 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-04 15:41:51,047 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 162 transitions, 1623 flow [2024-06-04 15:41:51,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-04 15:41:51,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:51,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:51,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 15:41:51,048 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:51,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:51,048 INFO L85 PathProgramCache]: Analyzing trace with hash -877891394, now seen corresponding path program 2 times [2024-06-04 15:41:51,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:51,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632952910] [2024-06-04 15:41:51,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:51,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:51,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:51,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632952910] [2024-06-04 15:41:51,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632952910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:51,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:51,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:41:51,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030300142] [2024-06-04 15:41:51,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:51,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:41:51,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:51,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:41:51,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:41:51,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:41:51,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 162 transitions, 1623 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-04 15:41:51,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:51,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:41:51,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:52,512 INFO L124 PetriNetUnfolderBase]: 2293/3426 cut-off events. [2024-06-04 15:41:52,512 INFO L125 PetriNetUnfolderBase]: For 75426/75438 co-relation queries the response was YES. [2024-06-04 15:41:52,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21088 conditions, 3426 events. 2293/3426 cut-off events. For 75426/75438 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15939 event pairs, 728 based on Foata normal form. 20/3446 useless extension candidates. Maximal degree in co-relation 21023. Up to 3075 conditions per place. [2024-06-04 15:41:52,537 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 141 selfloop transitions, 50 changer transitions 0/194 dead transitions. [2024-06-04 15:41:52,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 194 transitions, 2133 flow [2024-06-04 15:41:52,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:41:52,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:41:52,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 15:41:52,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-04 15:41:52,538 INFO L175 Difference]: Start difference. First operand has 137 places, 162 transitions, 1623 flow. Second operand 8 states and 135 transitions. [2024-06-04 15:41:52,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 194 transitions, 2133 flow [2024-06-04 15:41:52,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 194 transitions, 2018 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 15:41:52,595 INFO L231 Difference]: Finished difference. Result has 139 places, 164 transitions, 1647 flow [2024-06-04 15:41:52,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1647, PETRI_PLACES=139, PETRI_TRANSITIONS=164} [2024-06-04 15:41:52,596 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-04 15:41:52,596 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 164 transitions, 1647 flow [2024-06-04 15:41:52,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-04 15:41:52,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:52,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:52,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 15:41:52,597 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:52,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:52,597 INFO L85 PathProgramCache]: Analyzing trace with hash -861773714, now seen corresponding path program 3 times [2024-06-04 15:41:52,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:52,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765864333] [2024-06-04 15:41:52,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:52,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:53,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:53,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765864333] [2024-06-04 15:41:53,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765864333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:53,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:53,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:41:53,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810385521] [2024-06-04 15:41:53,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:53,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:41:53,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:53,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:41:53,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:41:53,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:41:53,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 164 transitions, 1647 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-04 15:41:53,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:53,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:41:53,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:54,102 INFO L124 PetriNetUnfolderBase]: 2277/3402 cut-off events. [2024-06-04 15:41:54,102 INFO L125 PetriNetUnfolderBase]: For 79158/79170 co-relation queries the response was YES. [2024-06-04 15:41:54,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21142 conditions, 3402 events. 2277/3402 cut-off events. For 79158/79170 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15911 event pairs, 665 based on Foata normal form. 20/3422 useless extension candidates. Maximal degree in co-relation 21076. Up to 2931 conditions per place. [2024-06-04 15:41:54,126 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 141 selfloop transitions, 53 changer transitions 0/197 dead transitions. [2024-06-04 15:41:54,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 197 transitions, 2169 flow [2024-06-04 15:41:54,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:41:54,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:41:54,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 15:41:54,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-04 15:41:54,127 INFO L175 Difference]: Start difference. First operand has 139 places, 164 transitions, 1647 flow. Second operand 8 states and 135 transitions. [2024-06-04 15:41:54,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 197 transitions, 2169 flow [2024-06-04 15:41:54,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 197 transitions, 2048 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 15:41:54,190 INFO L231 Difference]: Finished difference. Result has 141 places, 166 transitions, 1675 flow [2024-06-04 15:41:54,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1526, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1675, PETRI_PLACES=141, PETRI_TRANSITIONS=166} [2024-06-04 15:41:54,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-04 15:41:54,191 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 166 transitions, 1675 flow [2024-06-04 15:41:54,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-04 15:41:54,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:54,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:54,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 15:41:54,191 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:54,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:54,192 INFO L85 PathProgramCache]: Analyzing trace with hash -870987720, now seen corresponding path program 5 times [2024-06-04 15:41:54,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:54,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636518589] [2024-06-04 15:41:54,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:54,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:55,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:55,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636518589] [2024-06-04 15:41:55,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636518589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:55,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:55,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:41:55,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580839660] [2024-06-04 15:41:55,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:55,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:41:55,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:55,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:41:55,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:41:55,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:41:55,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 166 transitions, 1675 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-04 15:41:55,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:55,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:41:55,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:55,975 INFO L124 PetriNetUnfolderBase]: 2321/3469 cut-off events. [2024-06-04 15:41:55,975 INFO L125 PetriNetUnfolderBase]: For 87201/87209 co-relation queries the response was YES. [2024-06-04 15:41:55,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21828 conditions, 3469 events. 2321/3469 cut-off events. For 87201/87209 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 16274 event pairs, 562 based on Foata normal form. 12/3481 useless extension candidates. Maximal degree in co-relation 21761. Up to 2741 conditions per place. [2024-06-04 15:41:56,002 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 132 selfloop transitions, 74 changer transitions 0/209 dead transitions. [2024-06-04 15:41:56,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 209 transitions, 2415 flow [2024-06-04 15:41:56,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:41:56,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:41:56,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 15:41:56,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 15:41:56,003 INFO L175 Difference]: Start difference. First operand has 141 places, 166 transitions, 1675 flow. Second operand 8 states and 144 transitions. [2024-06-04 15:41:56,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 209 transitions, 2415 flow [2024-06-04 15:41:56,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 209 transitions, 2284 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-04 15:41:56,071 INFO L231 Difference]: Finished difference. Result has 144 places, 176 transitions, 1860 flow [2024-06-04 15:41:56,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1544, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1860, PETRI_PLACES=144, PETRI_TRANSITIONS=176} [2024-06-04 15:41:56,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-04 15:41:56,072 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 176 transitions, 1860 flow [2024-06-04 15:41:56,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-04 15:41:56,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:56,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:56,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 15:41:56,072 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:56,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:56,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1401201108, now seen corresponding path program 6 times [2024-06-04 15:41:56,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:56,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337894585] [2024-06-04 15:41:56,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:56,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:57,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:57,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337894585] [2024-06-04 15:41:57,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337894585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:57,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:57,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:57,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137585311] [2024-06-04 15:41:57,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:57,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:57,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:57,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:57,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:41:57,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:41:57,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 176 transitions, 1860 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:57,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:57,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:41:57,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:41:58,126 INFO L124 PetriNetUnfolderBase]: 2343/3501 cut-off events. [2024-06-04 15:41:58,126 INFO L125 PetriNetUnfolderBase]: For 94420/94428 co-relation queries the response was YES. [2024-06-04 15:41:58,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22875 conditions, 3501 events. 2343/3501 cut-off events. For 94420/94428 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16444 event pairs, 588 based on Foata normal form. 8/3509 useless extension candidates. Maximal degree in co-relation 22806. Up to 2959 conditions per place. [2024-06-04 15:41:58,200 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 145 selfloop transitions, 69 changer transitions 0/217 dead transitions. [2024-06-04 15:41:58,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 217 transitions, 2634 flow [2024-06-04 15:41:58,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:41:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:41:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 15:41:58,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 15:41:58,201 INFO L175 Difference]: Start difference. First operand has 144 places, 176 transitions, 1860 flow. Second operand 8 states and 144 transitions. [2024-06-04 15:41:58,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 217 transitions, 2634 flow [2024-06-04 15:41:58,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 217 transitions, 2520 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-04 15:41:58,282 INFO L231 Difference]: Finished difference. Result has 150 places, 184 transitions, 2060 flow [2024-06-04 15:41:58,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2060, PETRI_PLACES=150, PETRI_TRANSITIONS=184} [2024-06-04 15:41:58,283 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-04 15:41:58,283 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 184 transitions, 2060 flow [2024-06-04 15:41:58,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:58,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:41:58,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:41:58,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 15:41:58,284 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:41:58,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:41:58,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1401195528, now seen corresponding path program 7 times [2024-06-04 15:41:58,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:41:58,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247884677] [2024-06-04 15:41:58,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:41:58,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:41:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:41:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:41:59,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:41:59,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247884677] [2024-06-04 15:41:59,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247884677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:41:59,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:41:59,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:41:59,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483794963] [2024-06-04 15:41:59,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:41:59,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:41:59,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:41:59,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:41:59,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:41:59,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:41:59,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 184 transitions, 2060 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:41:59,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:41:59,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:41:59,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:00,202 INFO L124 PetriNetUnfolderBase]: 2333/3487 cut-off events. [2024-06-04 15:42:00,202 INFO L125 PetriNetUnfolderBase]: For 99182/99190 co-relation queries the response was YES. [2024-06-04 15:42:00,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23261 conditions, 3487 events. 2333/3487 cut-off events. For 99182/99190 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16341 event pairs, 593 based on Foata normal form. 8/3495 useless extension candidates. Maximal degree in co-relation 23189. Up to 2951 conditions per place. [2024-06-04 15:42:00,233 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 140 selfloop transitions, 70 changer transitions 0/213 dead transitions. [2024-06-04 15:42:00,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 213 transitions, 2566 flow [2024-06-04 15:42:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:00,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:00,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 15:42:00,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-04 15:42:00,234 INFO L175 Difference]: Start difference. First operand has 150 places, 184 transitions, 2060 flow. Second operand 8 states and 139 transitions. [2024-06-04 15:42:00,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 213 transitions, 2566 flow [2024-06-04 15:42:00,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 213 transitions, 2419 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-04 15:42:00,354 INFO L231 Difference]: Finished difference. Result has 155 places, 184 transitions, 2061 flow [2024-06-04 15:42:00,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1913, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2061, PETRI_PLACES=155, PETRI_TRANSITIONS=184} [2024-06-04 15:42:00,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-04 15:42:00,354 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 184 transitions, 2061 flow [2024-06-04 15:42:00,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:00,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:00,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:00,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 15:42:00,355 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:00,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:00,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1895652456, now seen corresponding path program 1 times [2024-06-04 15:42:00,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:00,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707992072] [2024-06-04 15:42:00,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:00,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:01,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:01,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707992072] [2024-06-04 15:42:01,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707992072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:01,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:01,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:01,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317706292] [2024-06-04 15:42:01,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:01,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:01,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:01,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:01,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:01,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:42:01,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 184 transitions, 2061 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:01,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:01,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:42:01,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:02,448 INFO L124 PetriNetUnfolderBase]: 2244/3385 cut-off events. [2024-06-04 15:42:02,449 INFO L125 PetriNetUnfolderBase]: For 109133/109176 co-relation queries the response was YES. [2024-06-04 15:42:02,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23243 conditions, 3385 events. 2244/3385 cut-off events. For 109133/109176 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16153 event pairs, 398 based on Foata normal form. 11/3338 useless extension candidates. Maximal degree in co-relation 23169. Up to 3046 conditions per place. [2024-06-04 15:42:02,478 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 145 selfloop transitions, 31 changer transitions 0/218 dead transitions. [2024-06-04 15:42:02,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 218 transitions, 2543 flow [2024-06-04 15:42:02,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:02,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 15:42:02,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 15:42:02,480 INFO L175 Difference]: Start difference. First operand has 155 places, 184 transitions, 2061 flow. Second operand 8 states and 140 transitions. [2024-06-04 15:42:02,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 218 transitions, 2543 flow [2024-06-04 15:42:02,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 218 transitions, 2415 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 15:42:02,579 INFO L231 Difference]: Finished difference. Result has 158 places, 186 transitions, 2036 flow [2024-06-04 15:42:02,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1933, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2036, PETRI_PLACES=158, PETRI_TRANSITIONS=186} [2024-06-04 15:42:02,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-04 15:42:02,580 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 186 transitions, 2036 flow [2024-06-04 15:42:02,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:02,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:02,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:02,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 15:42:02,580 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)] === [2024-06-04 15:42:02,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:02,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1687915156, now seen corresponding path program 2 times [2024-06-04 15:42:02,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:02,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860098320] [2024-06-04 15:42:02,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:02,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:03,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:03,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:03,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860098320] [2024-06-04 15:42:03,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860098320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:03,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:03,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:03,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68523526] [2024-06-04 15:42:03,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:03,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:03,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:03,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:03,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:04,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:42:04,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 186 transitions, 2036 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:04,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:04,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:42:04,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:04,828 INFO L124 PetriNetUnfolderBase]: 2259/3412 cut-off events. [2024-06-04 15:42:04,828 INFO L125 PetriNetUnfolderBase]: For 116966/117008 co-relation queries the response was YES. [2024-06-04 15:42:04,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23677 conditions, 3412 events. 2259/3412 cut-off events. For 116966/117008 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16345 event pairs, 510 based on Foata normal form. 9/3361 useless extension candidates. Maximal degree in co-relation 23602. Up to 3055 conditions per place. [2024-06-04 15:42:04,855 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 142 selfloop transitions, 36 changer transitions 0/220 dead transitions. [2024-06-04 15:42:04,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 220 transitions, 2526 flow [2024-06-04 15:42:04,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:04,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 15:42:04,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-04 15:42:04,857 INFO L175 Difference]: Start difference. First operand has 158 places, 186 transitions, 2036 flow. Second operand 8 states and 141 transitions. [2024-06-04 15:42:04,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 220 transitions, 2526 flow [2024-06-04 15:42:04,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 220 transitions, 2441 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 15:42:04,949 INFO L231 Difference]: Finished difference. Result has 160 places, 188 transitions, 2070 flow [2024-06-04 15:42:04,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2070, PETRI_PLACES=160, PETRI_TRANSITIONS=188} [2024-06-04 15:42:04,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-04 15:42:04,949 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 188 transitions, 2070 flow [2024-06-04 15:42:04,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:04,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:04,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:04,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 15:42:04,950 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)] === [2024-06-04 15:42:04,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:04,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1690716626, now seen corresponding path program 1 times [2024-06-04 15:42:04,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:04,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372811802] [2024-06-04 15:42:04,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:04,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:06,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:06,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372811802] [2024-06-04 15:42:06,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372811802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:06,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:06,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:42:06,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765812250] [2024-06-04 15:42:06,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:06,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:42:06,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:06,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:42:06,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:42:06,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:06,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 188 transitions, 2070 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:42:06,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:06,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:06,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:07,187 INFO L124 PetriNetUnfolderBase]: 2405/3590 cut-off events. [2024-06-04 15:42:07,187 INFO L125 PetriNetUnfolderBase]: For 119524/119528 co-relation queries the response was YES. [2024-06-04 15:42:07,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24794 conditions, 3590 events. 2405/3590 cut-off events. For 119524/119528 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16903 event pairs, 556 based on Foata normal form. 8/3598 useless extension candidates. Maximal degree in co-relation 24718. Up to 3320 conditions per place. [2024-06-04 15:42:07,215 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 186 selfloop transitions, 39 changer transitions 0/228 dead transitions. [2024-06-04 15:42:07,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 228 transitions, 2682 flow [2024-06-04 15:42:07,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:42:07,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:42:07,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-04 15:42:07,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-04 15:42:07,217 INFO L175 Difference]: Start difference. First operand has 160 places, 188 transitions, 2070 flow. Second operand 9 states and 150 transitions. [2024-06-04 15:42:07,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 228 transitions, 2682 flow [2024-06-04 15:42:07,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 228 transitions, 2585 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 15:42:07,330 INFO L231 Difference]: Finished difference. Result has 163 places, 191 transitions, 2114 flow [2024-06-04 15:42:07,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1973, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2114, PETRI_PLACES=163, PETRI_TRANSITIONS=191} [2024-06-04 15:42:07,331 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-04 15:42:07,331 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 191 transitions, 2114 flow [2024-06-04 15:42:07,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:42:07,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:07,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:07,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 15:42:07,331 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)] === [2024-06-04 15:42:07,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:07,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1806007796, now seen corresponding path program 2 times [2024-06-04 15:42:07,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:07,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804017363] [2024-06-04 15:42:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:07,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:08,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:08,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804017363] [2024-06-04 15:42:08,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804017363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:08,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:08,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:42:08,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270120837] [2024-06-04 15:42:08,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:08,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:42:08,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:08,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:42:08,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:42:08,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:08,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 191 transitions, 2114 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:42:08,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:08,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:08,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:09,585 INFO L124 PetriNetUnfolderBase]: 2427/3623 cut-off events. [2024-06-04 15:42:09,585 INFO L125 PetriNetUnfolderBase]: For 126079/126079 co-relation queries the response was YES. [2024-06-04 15:42:09,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25184 conditions, 3623 events. 2427/3623 cut-off events. For 126079/126079 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17094 event pairs, 543 based on Foata normal form. 4/3627 useless extension candidates. Maximal degree in co-relation 25107. Up to 3224 conditions per place. [2024-06-04 15:42:09,612 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 172 selfloop transitions, 54 changer transitions 0/229 dead transitions. [2024-06-04 15:42:09,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 229 transitions, 2722 flow [2024-06-04 15:42:09,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:42:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:42:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-04 15:42:09,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 15:42:09,613 INFO L175 Difference]: Start difference. First operand has 163 places, 191 transitions, 2114 flow. Second operand 9 states and 153 transitions. [2024-06-04 15:42:09,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 229 transitions, 2722 flow [2024-06-04 15:42:09,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 229 transitions, 2613 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-04 15:42:09,732 INFO L231 Difference]: Finished difference. Result has 165 places, 194 transitions, 2181 flow [2024-06-04 15:42:09,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2005, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2181, PETRI_PLACES=165, PETRI_TRANSITIONS=194} [2024-06-04 15:42:09,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-04 15:42:09,733 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 194 transitions, 2181 flow [2024-06-04 15:42:09,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:42:09,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:09,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:09,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 15:42:09,733 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:09,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:09,733 INFO L85 PathProgramCache]: Analyzing trace with hash -38632186, now seen corresponding path program 3 times [2024-06-04 15:42:09,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:09,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226554065] [2024-06-04 15:42:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:09,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:11,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:11,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226554065] [2024-06-04 15:42:11,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226554065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:11,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:11,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:42:11,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173667326] [2024-06-04 15:42:11,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:11,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:42:11,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:11,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:42:11,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:42:11,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:42:11,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 194 transitions, 2181 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-04 15:42:11,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:11,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:42:11,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:12,295 INFO L124 PetriNetUnfolderBase]: 2321/3507 cut-off events. [2024-06-04 15:42:12,295 INFO L125 PetriNetUnfolderBase]: For 141402/141443 co-relation queries the response was YES. [2024-06-04 15:42:12,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25134 conditions, 3507 events. 2321/3507 cut-off events. For 141402/141443 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16968 event pairs, 504 based on Foata normal form. 8/3453 useless extension candidates. Maximal degree in co-relation 25056. Up to 3076 conditions per place. [2024-06-04 15:42:12,320 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 134 selfloop transitions, 48 changer transitions 0/226 dead transitions. [2024-06-04 15:42:12,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 226 transitions, 2671 flow [2024-06-04 15:42:12,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:12,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:12,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 15:42:12,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-04 15:42:12,321 INFO L175 Difference]: Start difference. First operand has 165 places, 194 transitions, 2181 flow. Second operand 8 states and 142 transitions. [2024-06-04 15:42:12,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 226 transitions, 2671 flow [2024-06-04 15:42:12,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 226 transitions, 2525 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-04 15:42:12,458 INFO L231 Difference]: Finished difference. Result has 166 places, 196 transitions, 2181 flow [2024-06-04 15:42:12,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2035, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2181, PETRI_PLACES=166, PETRI_TRANSITIONS=196} [2024-06-04 15:42:12,458 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-04 15:42:12,458 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 196 transitions, 2181 flow [2024-06-04 15:42:12,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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) [2024-06-04 15:42:12,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:12,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:12,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 15:42:12,459 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:12,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:12,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1660358452, now seen corresponding path program 3 times [2024-06-04 15:42:12,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:12,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361826841] [2024-06-04 15:42:12,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:12,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:13,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:13,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361826841] [2024-06-04 15:42:13,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361826841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:13,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:13,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:42:13,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224253116] [2024-06-04 15:42:13,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:13,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:42:13,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:13,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:42:13,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:42:13,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:13,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 196 transitions, 2181 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:42:13,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:13,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:13,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:14,788 INFO L124 PetriNetUnfolderBase]: 2474/3694 cut-off events. [2024-06-04 15:42:14,789 INFO L125 PetriNetUnfolderBase]: For 142841/142841 co-relation queries the response was YES. [2024-06-04 15:42:14,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26232 conditions, 3694 events. 2474/3694 cut-off events. For 142841/142841 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17509 event pairs, 542 based on Foata normal form. 4/3698 useless extension candidates. Maximal degree in co-relation 26153. Up to 3295 conditions per place. [2024-06-04 15:42:14,820 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 176 selfloop transitions, 56 changer transitions 0/235 dead transitions. [2024-06-04 15:42:14,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 235 transitions, 2811 flow [2024-06-04 15:42:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:42:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:42:14,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-04 15:42:14,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 15:42:14,821 INFO L175 Difference]: Start difference. First operand has 166 places, 196 transitions, 2181 flow. Second operand 9 states and 153 transitions. [2024-06-04 15:42:14,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 235 transitions, 2811 flow [2024-06-04 15:42:14,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 235 transitions, 2685 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 15:42:14,981 INFO L231 Difference]: Finished difference. Result has 169 places, 199 transitions, 2241 flow [2024-06-04 15:42:14,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2241, PETRI_PLACES=169, PETRI_TRANSITIONS=199} [2024-06-04 15:42:14,982 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-04 15:42:14,982 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 199 transitions, 2241 flow [2024-06-04 15:42:14,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-04 15:42:14,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:14,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:14,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 15:42:14,982 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:14,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:14,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1806187286, now seen corresponding path program 4 times [2024-06-04 15:42:14,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:14,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519145532] [2024-06-04 15:42:14,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:14,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:16,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:16,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519145532] [2024-06-04 15:42:16,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519145532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:16,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:16,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:42:16,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941560356] [2024-06-04 15:42:16,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:16,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:42:16,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:16,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:42:16,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:42:16,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:16,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 199 transitions, 2241 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-04 15:42:16,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:16,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:16,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:16,877 INFO L124 PetriNetUnfolderBase]: 2496/3732 cut-off events. [2024-06-04 15:42:16,877 INFO L125 PetriNetUnfolderBase]: For 150938/150946 co-relation queries the response was YES. [2024-06-04 15:42:16,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26687 conditions, 3732 events. 2496/3732 cut-off events. For 150938/150946 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 17736 event pairs, 546 based on Foata normal form. 8/3740 useless extension candidates. Maximal degree in co-relation 26607. Up to 2975 conditions per place. [2024-06-04 15:42:16,910 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 136 selfloop transitions, 96 changer transitions 0/235 dead transitions. [2024-06-04 15:42:16,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 235 transitions, 3003 flow [2024-06-04 15:42:16,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:16,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:16,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 15:42:16,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 15:42:16,911 INFO L175 Difference]: Start difference. First operand has 169 places, 199 transitions, 2241 flow. Second operand 8 states and 144 transitions. [2024-06-04 15:42:16,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 235 transitions, 3003 flow [2024-06-04 15:42:17,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 235 transitions, 2847 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-04 15:42:17,095 INFO L231 Difference]: Finished difference. Result has 170 places, 202 transitions, 2352 flow [2024-06-04 15:42:17,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2352, PETRI_PLACES=170, PETRI_TRANSITIONS=202} [2024-06-04 15:42:17,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-04 15:42:17,096 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 202 transitions, 2352 flow [2024-06-04 15:42:17,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-04 15:42:17,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:17,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:17,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 15:42:17,097 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)] === [2024-06-04 15:42:17,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:17,097 INFO L85 PathProgramCache]: Analyzing trace with hash -436681217, now seen corresponding path program 1 times [2024-06-04 15:42:17,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:17,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224432604] [2024-06-04 15:42:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:17,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:17,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:17,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:17,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224432604] [2024-06-04 15:42:17,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224432604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:17,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:17,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:42:17,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752369473] [2024-06-04 15:42:17,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:17,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:42:17,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:17,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:42:17,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:42:18,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:18,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 202 transitions, 2352 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:18,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:18,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:18,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:18,782 INFO L124 PetriNetUnfolderBase]: 2526/3767 cut-off events. [2024-06-04 15:42:18,782 INFO L125 PetriNetUnfolderBase]: For 157711/157715 co-relation queries the response was YES. [2024-06-04 15:42:18,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27261 conditions, 3767 events. 2526/3767 cut-off events. For 157711/157715 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 17865 event pairs, 693 based on Foata normal form. 8/3775 useless extension candidates. Maximal degree in co-relation 27180. Up to 3629 conditions per place. [2024-06-04 15:42:18,813 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 201 selfloop transitions, 33 changer transitions 0/237 dead transitions. [2024-06-04 15:42:18,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 237 transitions, 3085 flow [2024-06-04 15:42:18,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:42:18,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:42:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-04 15:42:18,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-04 15:42:18,814 INFO L175 Difference]: Start difference. First operand has 170 places, 202 transitions, 2352 flow. Second operand 7 states and 118 transitions. [2024-06-04 15:42:18,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 237 transitions, 3085 flow [2024-06-04 15:42:18,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 237 transitions, 2857 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-04 15:42:18,990 INFO L231 Difference]: Finished difference. Result has 173 places, 213 transitions, 2332 flow [2024-06-04 15:42:18,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2124, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2332, PETRI_PLACES=173, PETRI_TRANSITIONS=213} [2024-06-04 15:42:18,990 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-04 15:42:18,990 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 213 transitions, 2332 flow [2024-06-04 15:42:18,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:18,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:18,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:18,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 15:42:18,991 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:18,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:18,991 INFO L85 PathProgramCache]: Analyzing trace with hash 487384806, now seen corresponding path program 4 times [2024-06-04 15:42:18,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:18,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632104459] [2024-06-04 15:42:18,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:18,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:19,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:20,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:20,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632104459] [2024-06-04 15:42:20,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632104459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:20,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:20,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:20,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6721581] [2024-06-04 15:42:20,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:20,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:20,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:20,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:20,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:20,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:42:20,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 213 transitions, 2332 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:20,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:20,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:42:20,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:21,228 INFO L124 PetriNetUnfolderBase]: 2384/3602 cut-off events. [2024-06-04 15:42:21,228 INFO L125 PetriNetUnfolderBase]: For 170180/170227 co-relation queries the response was YES. [2024-06-04 15:42:21,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26405 conditions, 3602 events. 2384/3602 cut-off events. For 170180/170227 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17404 event pairs, 520 based on Foata normal form. 11/3548 useless extension candidates. Maximal degree in co-relation 26322. Up to 3097 conditions per place. [2024-06-04 15:42:21,261 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 137 selfloop transitions, 61 changer transitions 0/244 dead transitions. [2024-06-04 15:42:21,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 244 transitions, 2856 flow [2024-06-04 15:42:21,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:21,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:21,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 15:42:21,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-04 15:42:21,262 INFO L175 Difference]: Start difference. First operand has 173 places, 213 transitions, 2332 flow. Second operand 8 states and 142 transitions. [2024-06-04 15:42:21,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 244 transitions, 2856 flow [2024-06-04 15:42:21,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 244 transitions, 2814 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-04 15:42:21,470 INFO L231 Difference]: Finished difference. Result has 179 places, 215 transitions, 2466 flow [2024-06-04 15:42:21,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2466, PETRI_PLACES=179, PETRI_TRANSITIONS=215} [2024-06-04 15:42:21,471 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-04 15:42:21,471 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 215 transitions, 2466 flow [2024-06-04 15:42:21,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:21,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:21,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:21,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 15:42:21,472 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:21,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:21,472 INFO L85 PathProgramCache]: Analyzing trace with hash 487562746, now seen corresponding path program 5 times [2024-06-04 15:42:21,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:21,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766781889] [2024-06-04 15:42:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:21,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:22,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:22,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766781889] [2024-06-04 15:42:22,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766781889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:22,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:22,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:22,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284439337] [2024-06-04 15:42:22,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:22,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:22,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:22,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:22,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:22,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:22,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 215 transitions, 2466 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:22,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:22,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:22,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:23,724 INFO L124 PetriNetUnfolderBase]: 2535/3787 cut-off events. [2024-06-04 15:42:23,724 INFO L125 PetriNetUnfolderBase]: For 171408/171418 co-relation queries the response was YES. [2024-06-04 15:42:23,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27747 conditions, 3787 events. 2535/3787 cut-off events. For 171408/171418 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18048 event pairs, 553 based on Foata normal form. 9/3796 useless extension candidates. Maximal degree in co-relation 27662. Up to 3228 conditions per place. [2024-06-04 15:42:23,753 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 179 selfloop transitions, 72 changer transitions 0/254 dead transitions. [2024-06-04 15:42:23,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 254 transitions, 3130 flow [2024-06-04 15:42:23,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:42:23,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:42:23,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 15:42:23,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-04 15:42:23,755 INFO L175 Difference]: Start difference. First operand has 179 places, 215 transitions, 2466 flow. Second operand 9 states and 157 transitions. [2024-06-04 15:42:23,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 254 transitions, 3130 flow [2024-06-04 15:42:23,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 254 transitions, 2974 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 15:42:23,917 INFO L231 Difference]: Finished difference. Result has 182 places, 218 transitions, 2524 flow [2024-06-04 15:42:23,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2310, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2524, PETRI_PLACES=182, PETRI_TRANSITIONS=218} [2024-06-04 15:42:23,918 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-04 15:42:23,918 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 218 transitions, 2524 flow [2024-06-04 15:42:23,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:23,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:23,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:23,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 15:42:23,919 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:23,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:23,919 INFO L85 PathProgramCache]: Analyzing trace with hash -144599926, now seen corresponding path program 6 times [2024-06-04 15:42:23,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:23,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264753607] [2024-06-04 15:42:23,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:23,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:25,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:25,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264753607] [2024-06-04 15:42:25,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264753607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:25,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:25,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:25,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076108689] [2024-06-04 15:42:25,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:25,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:25,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:25,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:25,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:25,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:25,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 218 transitions, 2524 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:25,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:25,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:25,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:26,159 INFO L124 PetriNetUnfolderBase]: 2557/3819 cut-off events. [2024-06-04 15:42:26,159 INFO L125 PetriNetUnfolderBase]: For 179491/179501 co-relation queries the response was YES. [2024-06-04 15:42:26,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28198 conditions, 3819 events. 2557/3819 cut-off events. For 179491/179501 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 18147 event pairs, 545 based on Foata normal form. 9/3828 useless extension candidates. Maximal degree in co-relation 28112. Up to 3000 conditions per place. [2024-06-04 15:42:26,191 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 157 selfloop transitions, 98 changer transitions 0/258 dead transitions. [2024-06-04 15:42:26,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 258 transitions, 3354 flow [2024-06-04 15:42:26,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:42:26,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:42:26,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-04 15:42:26,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-04 15:42:26,192 INFO L175 Difference]: Start difference. First operand has 182 places, 218 transitions, 2524 flow. Second operand 9 states and 159 transitions. [2024-06-04 15:42:26,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 258 transitions, 3354 flow [2024-06-04 15:42:26,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 258 transitions, 3170 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-04 15:42:26,403 INFO L231 Difference]: Finished difference. Result has 184 places, 221 transitions, 2606 flow [2024-06-04 15:42:26,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2606, PETRI_PLACES=184, PETRI_TRANSITIONS=221} [2024-06-04 15:42:26,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-04 15:42:26,403 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 221 transitions, 2606 flow [2024-06-04 15:42:26,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:26,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:26,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:26,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 15:42:26,404 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:26,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:26,404 INFO L85 PathProgramCache]: Analyzing trace with hash 487389766, now seen corresponding path program 7 times [2024-06-04 15:42:26,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:26,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896951070] [2024-06-04 15:42:26,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:26,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:27,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:27,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896951070] [2024-06-04 15:42:27,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896951070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:27,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:27,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:42:27,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933087257] [2024-06-04 15:42:27,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:27,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:42:27,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:27,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:42:27,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:42:27,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:27,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 221 transitions, 2606 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:27,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:27,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:27,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:28,631 INFO L124 PetriNetUnfolderBase]: 2547/3805 cut-off events. [2024-06-04 15:42:28,631 INFO L125 PetriNetUnfolderBase]: For 184823/184833 co-relation queries the response was YES. [2024-06-04 15:42:28,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28219 conditions, 3805 events. 2547/3805 cut-off events. For 184823/184833 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18104 event pairs, 560 based on Foata normal form. 9/3814 useless extension candidates. Maximal degree in co-relation 28132. Up to 3246 conditions per place. [2024-06-04 15:42:28,663 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 179 selfloop transitions, 73 changer transitions 0/255 dead transitions. [2024-06-04 15:42:28,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 255 transitions, 3210 flow [2024-06-04 15:42:28,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:42:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:42:28,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-04 15:42:28,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-04 15:42:28,664 INFO L175 Difference]: Start difference. First operand has 184 places, 221 transitions, 2606 flow. Second operand 9 states and 154 transitions. [2024-06-04 15:42:28,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 255 transitions, 3210 flow [2024-06-04 15:42:28,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 255 transitions, 3001 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-04 15:42:28,905 INFO L231 Difference]: Finished difference. Result has 187 places, 221 transitions, 2551 flow [2024-06-04 15:42:28,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2397, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2551, PETRI_PLACES=187, PETRI_TRANSITIONS=221} [2024-06-04 15:42:28,905 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-04 15:42:28,906 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 221 transitions, 2551 flow [2024-06-04 15:42:28,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:28,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:28,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:28,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 15:42:28,906 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)] === [2024-06-04 15:42:28,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:28,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1033442119, now seen corresponding path program 2 times [2024-06-04 15:42:28,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:28,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785494621] [2024-06-04 15:42:28,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:28,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:29,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:29,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785494621] [2024-06-04 15:42:29,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785494621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:29,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:29,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:42:29,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354310464] [2024-06-04 15:42:29,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:29,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:42:29,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:29,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:42:29,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:42:29,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:29,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 221 transitions, 2551 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:29,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:29,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:29,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:30,667 INFO L124 PetriNetUnfolderBase]: 2567/3826 cut-off events. [2024-06-04 15:42:30,667 INFO L125 PetriNetUnfolderBase]: For 192115/192119 co-relation queries the response was YES. [2024-06-04 15:42:30,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28355 conditions, 3826 events. 2567/3826 cut-off events. For 192115/192119 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 18244 event pairs, 700 based on Foata normal form. 8/3834 useless extension candidates. Maximal degree in co-relation 28267. Up to 3716 conditions per place. [2024-06-04 15:42:30,699 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 211 selfloop transitions, 28 changer transitions 0/242 dead transitions. [2024-06-04 15:42:30,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 242 transitions, 3129 flow [2024-06-04 15:42:30,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:42:30,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:42:30,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-04 15:42:30,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-04 15:42:30,700 INFO L175 Difference]: Start difference. First operand has 187 places, 221 transitions, 2551 flow. Second operand 5 states and 92 transitions. [2024-06-04 15:42:30,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 242 transitions, 3129 flow [2024-06-04 15:42:30,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 242 transitions, 2865 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-04 15:42:30,926 INFO L231 Difference]: Finished difference. Result has 183 places, 224 transitions, 2413 flow [2024-06-04 15:42:30,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2413, PETRI_PLACES=183, PETRI_TRANSITIONS=224} [2024-06-04 15:42:30,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-04 15:42:30,927 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 224 transitions, 2413 flow [2024-06-04 15:42:30,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:30,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:30,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:30,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 15:42:30,928 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)] === [2024-06-04 15:42:30,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:30,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1081117085, now seen corresponding path program 3 times [2024-06-04 15:42:30,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:30,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101366891] [2024-06-04 15:42:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:30,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:31,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:31,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101366891] [2024-06-04 15:42:31,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101366891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:31,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:31,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:42:31,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327413550] [2024-06-04 15:42:31,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:31,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:42:31,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:31,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:42:31,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:42:31,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:31,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 224 transitions, 2413 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:31,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:31,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:31,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:32,569 INFO L124 PetriNetUnfolderBase]: 2555/3810 cut-off events. [2024-06-04 15:42:32,569 INFO L125 PetriNetUnfolderBase]: For 195329/195333 co-relation queries the response was YES. [2024-06-04 15:42:32,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27831 conditions, 3810 events. 2555/3810 cut-off events. For 195329/195333 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 18061 event pairs, 694 based on Foata normal form. 8/3818 useless extension candidates. Maximal degree in co-relation 27742. Up to 3668 conditions per place. [2024-06-04 15:42:32,603 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 208 selfloop transitions, 34 changer transitions 0/245 dead transitions. [2024-06-04 15:42:32,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 245 transitions, 2965 flow [2024-06-04 15:42:32,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:42:32,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:42:32,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-04 15:42:32,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 15:42:32,604 INFO L175 Difference]: Start difference. First operand has 183 places, 224 transitions, 2413 flow. Second operand 6 states and 105 transitions. [2024-06-04 15:42:32,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 245 transitions, 2965 flow [2024-06-04 15:42:32,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 245 transitions, 2891 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-04 15:42:32,855 INFO L231 Difference]: Finished difference. Result has 186 places, 224 transitions, 2419 flow [2024-06-04 15:42:32,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2339, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2419, PETRI_PLACES=186, PETRI_TRANSITIONS=224} [2024-06-04 15:42:32,855 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-04 15:42:32,855 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 224 transitions, 2419 flow [2024-06-04 15:42:32,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:32,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:32,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:32,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 15:42:32,856 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)] === [2024-06-04 15:42:32,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:32,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1811834565, now seen corresponding path program 1 times [2024-06-04 15:42:32,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:32,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755634116] [2024-06-04 15:42:32,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:32,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:33,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:33,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755634116] [2024-06-04 15:42:33,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755634116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:33,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:33,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:42:33,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963957259] [2024-06-04 15:42:33,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:33,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:42:33,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:33,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:42:33,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:42:33,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:33,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 224 transitions, 2419 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-04 15:42:33,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:33,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:33,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:34,347 INFO L124 PetriNetUnfolderBase]: 2586/3865 cut-off events. [2024-06-04 15:42:34,347 INFO L125 PetriNetUnfolderBase]: For 206498/206498 co-relation queries the response was YES. [2024-06-04 15:42:34,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28395 conditions, 3865 events. 2586/3865 cut-off events. For 206498/206498 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18643 event pairs, 1122 based on Foata normal form. 3/3868 useless extension candidates. Maximal degree in co-relation 28305. Up to 3773 conditions per place. [2024-06-04 15:42:34,383 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 225 selfloop transitions, 25 changer transitions 0/253 dead transitions. [2024-06-04 15:42:34,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 253 transitions, 3212 flow [2024-06-04 15:42:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:42:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:42:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-04 15:42:34,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-04 15:42:34,388 INFO L175 Difference]: Start difference. First operand has 186 places, 224 transitions, 2419 flow. Second operand 8 states and 125 transitions. [2024-06-04 15:42:34,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 253 transitions, 3212 flow [2024-06-04 15:42:34,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 253 transitions, 3129 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 15:42:34,620 INFO L231 Difference]: Finished difference. Result has 190 places, 232 transitions, 2514 flow [2024-06-04 15:42:34,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2514, PETRI_PLACES=190, PETRI_TRANSITIONS=232} [2024-06-04 15:42:34,620 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-04 15:42:34,620 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 232 transitions, 2514 flow [2024-06-04 15:42:34,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-04 15:42:34,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:34,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:34,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 15:42:34,621 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)] === [2024-06-04 15:42:34,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:34,621 INFO L85 PathProgramCache]: Analyzing trace with hash -837686171, now seen corresponding path program 2 times [2024-06-04 15:42:34,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:34,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947978874] [2024-06-04 15:42:34,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:34,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:35,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:35,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947978874] [2024-06-04 15:42:35,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947978874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:35,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:35,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:42:35,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161229274] [2024-06-04 15:42:35,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:35,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:42:35,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:35,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:42:35,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:42:35,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:35,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 232 transitions, 2514 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:35,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:35,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:35,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:36,163 INFO L124 PetriNetUnfolderBase]: 2616/3907 cut-off events. [2024-06-04 15:42:36,164 INFO L125 PetriNetUnfolderBase]: For 207946/207946 co-relation queries the response was YES. [2024-06-04 15:42:36,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28907 conditions, 3907 events. 2616/3907 cut-off events. For 207946/207946 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 18863 event pairs, 1123 based on Foata normal form. 3/3910 useless extension candidates. Maximal degree in co-relation 28816. Up to 3831 conditions per place. [2024-06-04 15:42:36,200 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 230 selfloop transitions, 24 changer transitions 0/257 dead transitions. [2024-06-04 15:42:36,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 257 transitions, 3186 flow [2024-06-04 15:42:36,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:42:36,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:42:36,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-04 15:42:36,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 15:42:36,201 INFO L175 Difference]: Start difference. First operand has 190 places, 232 transitions, 2514 flow. Second operand 7 states and 112 transitions. [2024-06-04 15:42:36,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 257 transitions, 3186 flow [2024-06-04 15:42:36,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 257 transitions, 3119 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-04 15:42:36,506 INFO L231 Difference]: Finished difference. Result has 194 places, 240 transitions, 2599 flow [2024-06-04 15:42:36,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2456, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2599, PETRI_PLACES=194, PETRI_TRANSITIONS=240} [2024-06-04 15:42:36,506 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-04 15:42:36,507 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 240 transitions, 2599 flow [2024-06-04 15:42:36,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:36,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:36,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:36,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 15:42:36,507 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)] === [2024-06-04 15:42:36,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:36,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1081332163, now seen corresponding path program 3 times [2024-06-04 15:42:36,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:36,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816230912] [2024-06-04 15:42:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:36,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:37,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:37,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816230912] [2024-06-04 15:42:37,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816230912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:37,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:37,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:42:37,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817124685] [2024-06-04 15:42:37,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:37,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:42:37,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:37,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:42:37,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:42:37,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:37,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 240 transitions, 2599 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:37,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:37,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:37,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:37,971 INFO L124 PetriNetUnfolderBase]: 2607/3895 cut-off events. [2024-06-04 15:42:37,971 INFO L125 PetriNetUnfolderBase]: For 213274/213274 co-relation queries the response was YES. [2024-06-04 15:42:37,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28884 conditions, 3895 events. 2607/3895 cut-off events. For 213274/213274 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18817 event pairs, 1124 based on Foata normal form. 3/3898 useless extension candidates. Maximal degree in co-relation 28791. Up to 3819 conditions per place. [2024-06-04 15:42:38,004 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 22 changer transitions 0/258 dead transitions. [2024-06-04 15:42:38,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 258 transitions, 3188 flow [2024-06-04 15:42:38,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:42:38,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:42:38,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-04 15:42:38,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-04 15:42:38,005 INFO L175 Difference]: Start difference. First operand has 194 places, 240 transitions, 2599 flow. Second operand 6 states and 103 transitions. [2024-06-04 15:42:38,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 258 transitions, 3188 flow [2024-06-04 15:42:38,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 258 transitions, 3089 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-04 15:42:38,320 INFO L231 Difference]: Finished difference. Result has 196 places, 240 transitions, 2555 flow [2024-06-04 15:42:38,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2555, PETRI_PLACES=196, PETRI_TRANSITIONS=240} [2024-06-04 15:42:38,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-04 15:42:38,320 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 240 transitions, 2555 flow [2024-06-04 15:42:38,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:38,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:38,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:38,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 15:42:38,321 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)] === [2024-06-04 15:42:38,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:38,321 INFO L85 PathProgramCache]: Analyzing trace with hash -919592379, now seen corresponding path program 1 times [2024-06-04 15:42:38,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:38,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959026104] [2024-06-04 15:42:38,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:38,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:39,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:39,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959026104] [2024-06-04 15:42:39,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959026104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:39,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:39,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:42:39,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459548033] [2024-06-04 15:42:39,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:39,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:42:39,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:39,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:42:39,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:42:39,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:39,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 240 transitions, 2555 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:39,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:39,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:39,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:39,993 INFO L124 PetriNetUnfolderBase]: 2601/3887 cut-off events. [2024-06-04 15:42:39,993 INFO L125 PetriNetUnfolderBase]: For 218419/218419 co-relation queries the response was YES. [2024-06-04 15:42:40,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28828 conditions, 3887 events. 2601/3887 cut-off events. For 218419/218419 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18726 event pairs, 1112 based on Foata normal form. 2/3889 useless extension candidates. Maximal degree in co-relation 28734. Up to 3810 conditions per place. [2024-06-04 15:42:40,027 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 227 selfloop transitions, 25 changer transitions 0/255 dead transitions. [2024-06-04 15:42:40,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 255 transitions, 3139 flow [2024-06-04 15:42:40,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:42:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:42:40,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-04 15:42:40,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-04 15:42:40,029 INFO L175 Difference]: Start difference. First operand has 196 places, 240 transitions, 2555 flow. Second operand 5 states and 88 transitions. [2024-06-04 15:42:40,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 255 transitions, 3139 flow [2024-06-04 15:42:40,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 255 transitions, 3084 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 15:42:40,309 INFO L231 Difference]: Finished difference. Result has 196 places, 243 transitions, 2622 flow [2024-06-04 15:42:40,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2622, PETRI_PLACES=196, PETRI_TRANSITIONS=243} [2024-06-04 15:42:40,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-04 15:42:40,309 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 243 transitions, 2622 flow [2024-06-04 15:42:40,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:40,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:40,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:40,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 15:42:40,310 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)] === [2024-06-04 15:42:40,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:40,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1081578427, now seen corresponding path program 1 times [2024-06-04 15:42:40,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:40,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643134653] [2024-06-04 15:42:40,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:40,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:41,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:41,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643134653] [2024-06-04 15:42:41,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643134653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:41,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:41,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:42:41,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297078205] [2024-06-04 15:42:41,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:41,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:42:41,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:41,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:42:41,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:42:41,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:41,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 243 transitions, 2622 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:41,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:41,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:41,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:42,143 INFO L124 PetriNetUnfolderBase]: 2596/3880 cut-off events. [2024-06-04 15:42:42,143 INFO L125 PetriNetUnfolderBase]: For 224114/224114 co-relation queries the response was YES. [2024-06-04 15:42:42,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29193 conditions, 3880 events. 2596/3880 cut-off events. For 224114/224114 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18633 event pairs, 1113 based on Foata normal form. 2/3882 useless extension candidates. Maximal degree in co-relation 29098. Up to 3832 conditions per place. [2024-06-04 15:42:42,178 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 239 selfloop transitions, 12 changer transitions 0/254 dead transitions. [2024-06-04 15:42:42,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 254 transitions, 3176 flow [2024-06-04 15:42:42,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:42:42,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:42:42,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-06-04 15:42:42,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-04 15:42:42,179 INFO L175 Difference]: Start difference. First operand has 196 places, 243 transitions, 2622 flow. Second operand 5 states and 82 transitions. [2024-06-04 15:42:42,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 254 transitions, 3176 flow [2024-06-04 15:42:42,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 254 transitions, 3118 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-04 15:42:42,473 INFO L231 Difference]: Finished difference. Result has 198 places, 245 transitions, 2625 flow [2024-06-04 15:42:42,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2564, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2625, PETRI_PLACES=198, PETRI_TRANSITIONS=245} [2024-06-04 15:42:42,473 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-04 15:42:42,473 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 245 transitions, 2625 flow [2024-06-04 15:42:42,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:42,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:42,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:42,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 15:42:42,474 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:42,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:42,474 INFO L85 PathProgramCache]: Analyzing trace with hash -733714691, now seen corresponding path program 1 times [2024-06-04 15:42:42,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:42,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294271239] [2024-06-04 15:42:42,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:42,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:43,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:43,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294271239] [2024-06-04 15:42:43,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294271239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:43,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:43,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:42:43,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141131348] [2024-06-04 15:42:43,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:43,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:42:43,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:43,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:42:43,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:42:44,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:44,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 245 transitions, 2625 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:44,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:44,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:44,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:44,912 INFO L124 PetriNetUnfolderBase]: 2662/3976 cut-off events. [2024-06-04 15:42:44,912 INFO L125 PetriNetUnfolderBase]: For 234433/234437 co-relation queries the response was YES. [2024-06-04 15:42:44,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29979 conditions, 3976 events. 2662/3976 cut-off events. For 234433/234437 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 19184 event pairs, 527 based on Foata normal form. 8/3984 useless extension candidates. Maximal degree in co-relation 29883. Up to 3759 conditions per place. [2024-06-04 15:42:44,950 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 257 selfloop transitions, 37 changer transitions 0/297 dead transitions. [2024-06-04 15:42:44,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 297 transitions, 3472 flow [2024-06-04 15:42:44,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:42:44,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:42:44,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-04 15:42:44,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-04 15:42:44,952 INFO L175 Difference]: Start difference. First operand has 198 places, 245 transitions, 2625 flow. Second operand 10 states and 164 transitions. [2024-06-04 15:42:44,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 297 transitions, 3472 flow [2024-06-04 15:42:45,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 297 transitions, 3427 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-04 15:42:45,294 INFO L231 Difference]: Finished difference. Result has 208 places, 257 transitions, 2836 flow [2024-06-04 15:42:45,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2580, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2836, PETRI_PLACES=208, PETRI_TRANSITIONS=257} [2024-06-04 15:42:45,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-04 15:42:45,295 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 257 transitions, 2836 flow [2024-06-04 15:42:45,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:45,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:45,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:45,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 15:42:45,295 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:45,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:45,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1424229625, now seen corresponding path program 2 times [2024-06-04 15:42:45,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:45,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014913764] [2024-06-04 15:42:45,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:45,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:46,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:46,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014913764] [2024-06-04 15:42:46,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014913764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:46,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:46,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:42:46,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172129330] [2024-06-04 15:42:46,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:46,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:42:46,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:46,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:42:46,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:42:46,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:46,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 257 transitions, 2836 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:46,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:46,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:46,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:47,741 INFO L124 PetriNetUnfolderBase]: 2679/4003 cut-off events. [2024-06-04 15:42:47,741 INFO L125 PetriNetUnfolderBase]: For 246982/246984 co-relation queries the response was YES. [2024-06-04 15:42:47,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30903 conditions, 4003 events. 2679/4003 cut-off events. For 246982/246984 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 19353 event pairs, 539 based on Foata normal form. 6/4009 useless extension candidates. Maximal degree in co-relation 30803. Up to 3787 conditions per place. [2024-06-04 15:42:47,775 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 256 selfloop transitions, 39 changer transitions 0/298 dead transitions. [2024-06-04 15:42:47,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 298 transitions, 3599 flow [2024-06-04 15:42:47,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:42:47,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:42:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-04 15:42:47,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-04 15:42:47,776 INFO L175 Difference]: Start difference. First operand has 208 places, 257 transitions, 2836 flow. Second operand 10 states and 167 transitions. [2024-06-04 15:42:47,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 298 transitions, 3599 flow [2024-06-04 15:42:48,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 298 transitions, 3504 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-04 15:42:48,108 INFO L231 Difference]: Finished difference. Result has 215 places, 259 transitions, 2876 flow [2024-06-04 15:42:48,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2741, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2876, PETRI_PLACES=215, PETRI_TRANSITIONS=259} [2024-06-04 15:42:48,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-04 15:42:48,109 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 259 transitions, 2876 flow [2024-06-04 15:42:48,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:48,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:48,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:48,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 15:42:48,109 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:48,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:48,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1424225905, now seen corresponding path program 3 times [2024-06-04 15:42:48,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:48,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635362558] [2024-06-04 15:42:48,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:48,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:49,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:49,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635362558] [2024-06-04 15:42:49,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635362558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:49,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:49,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:42:49,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023472950] [2024-06-04 15:42:49,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:49,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:42:49,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:49,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:42:49,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:42:49,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:49,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 259 transitions, 2876 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:49,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:49,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:49,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:50,995 INFO L124 PetriNetUnfolderBase]: 2713/4055 cut-off events. [2024-06-04 15:42:50,995 INFO L125 PetriNetUnfolderBase]: For 258231/258233 co-relation queries the response was YES. [2024-06-04 15:42:51,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31602 conditions, 4055 events. 2713/4055 cut-off events. For 258231/258233 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 19673 event pairs, 530 based on Foata normal form. 6/4061 useless extension candidates. Maximal degree in co-relation 31500. Up to 3782 conditions per place. [2024-06-04 15:42:51,037 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 252 selfloop transitions, 47 changer transitions 0/302 dead transitions. [2024-06-04 15:42:51,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 302 transitions, 3679 flow [2024-06-04 15:42:51,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:42:51,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:42:51,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-04 15:42:51,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-04 15:42:51,038 INFO L175 Difference]: Start difference. First operand has 215 places, 259 transitions, 2876 flow. Second operand 10 states and 169 transitions. [2024-06-04 15:42:51,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 302 transitions, 3679 flow [2024-06-04 15:42:51,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 302 transitions, 3562 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-04 15:42:51,401 INFO L231 Difference]: Finished difference. Result has 218 places, 263 transitions, 2950 flow [2024-06-04 15:42:51,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2759, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2950, PETRI_PLACES=218, PETRI_TRANSITIONS=263} [2024-06-04 15:42:51,402 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-04 15:42:51,402 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 263 transitions, 2950 flow [2024-06-04 15:42:51,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:51,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:51,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:51,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 15:42:51,402 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)] === [2024-06-04 15:42:51,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:51,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1422351955, now seen corresponding path program 4 times [2024-06-04 15:42:51,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:51,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071534838] [2024-06-04 15:42:51,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:51,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:52,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:52,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071534838] [2024-06-04 15:42:52,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071534838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:52,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:52,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:42:52,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341882007] [2024-06-04 15:42:52,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:52,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:42:52,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:52,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:42:52,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:42:52,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:52,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 263 transitions, 2950 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:52,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:52,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:52,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:53,957 INFO L124 PetriNetUnfolderBase]: 2798/4196 cut-off events. [2024-06-04 15:42:53,957 INFO L125 PetriNetUnfolderBase]: For 269693/269695 co-relation queries the response was YES. [2024-06-04 15:42:53,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32651 conditions, 4196 events. 2798/4196 cut-off events. For 269693/269695 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 20699 event pairs, 535 based on Foata normal form. 6/4202 useless extension candidates. Maximal degree in co-relation 32547. Up to 3942 conditions per place. [2024-06-04 15:42:53,993 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 269 selfloop transitions, 43 changer transitions 0/315 dead transitions. [2024-06-04 15:42:53,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 315 transitions, 3863 flow [2024-06-04 15:42:53,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:42:53,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:42:53,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-04 15:42:53,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-04 15:42:53,996 INFO L175 Difference]: Start difference. First operand has 218 places, 263 transitions, 2950 flow. Second operand 10 states and 166 transitions. [2024-06-04 15:42:53,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 315 transitions, 3863 flow [2024-06-04 15:42:54,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 315 transitions, 3758 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-04 15:42:54,371 INFO L231 Difference]: Finished difference. Result has 225 places, 275 transitions, 3131 flow [2024-06-04 15:42:54,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2845, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3131, PETRI_PLACES=225, PETRI_TRANSITIONS=275} [2024-06-04 15:42:54,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-04 15:42:54,372 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 275 transitions, 3131 flow [2024-06-04 15:42:54,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:54,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:54,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:54,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 15:42:54,373 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:54,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:54,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1511071537, now seen corresponding path program 1 times [2024-06-04 15:42:54,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:54,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304429695] [2024-06-04 15:42:54,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:54,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:55,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:55,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304429695] [2024-06-04 15:42:55,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304429695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:55,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:55,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:42:55,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297668686] [2024-06-04 15:42:55,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:55,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:42:55,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:55,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:42:55,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:42:55,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:55,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 275 transitions, 3131 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:55,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:55,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:55,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:42:56,952 INFO L124 PetriNetUnfolderBase]: 2895/4355 cut-off events. [2024-06-04 15:42:56,952 INFO L125 PetriNetUnfolderBase]: For 302081/302083 co-relation queries the response was YES. [2024-06-04 15:42:56,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33905 conditions, 4355 events. 2895/4355 cut-off events. For 302081/302083 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21780 event pairs, 542 based on Foata normal form. 22/4377 useless extension candidates. Maximal degree in co-relation 33797. Up to 4008 conditions per place. [2024-06-04 15:42:57,000 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 283 selfloop transitions, 41 changer transitions 0/327 dead transitions. [2024-06-04 15:42:57,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 327 transitions, 3993 flow [2024-06-04 15:42:57,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:42:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:42:57,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-04 15:42:57,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-04 15:42:57,001 INFO L175 Difference]: Start difference. First operand has 225 places, 275 transitions, 3131 flow. Second operand 11 states and 185 transitions. [2024-06-04 15:42:57,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 327 transitions, 3993 flow [2024-06-04 15:42:57,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 327 transitions, 3864 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-04 15:42:57,419 INFO L231 Difference]: Finished difference. Result has 232 places, 279 transitions, 3146 flow [2024-06-04 15:42:57,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3002, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3146, PETRI_PLACES=232, PETRI_TRANSITIONS=279} [2024-06-04 15:42:57,420 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-04 15:42:57,420 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 279 transitions, 3146 flow [2024-06-04 15:42:57,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:57,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:42:57,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:42:57,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 15:42:57,421 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:42:57,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:42:57,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1067960957, now seen corresponding path program 5 times [2024-06-04 15:42:57,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:42:57,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011394922] [2024-06-04 15:42:57,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:42:57,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:42:57,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:42:59,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:42:59,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:42:59,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011394922] [2024-06-04 15:42:59,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011394922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:42:59,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:42:59,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:42:59,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118128116] [2024-06-04 15:42:59,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:42:59,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:42:59,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:42:59,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:42:59,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:42:59,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:42:59,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 279 transitions, 3146 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:42:59,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:42:59,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:42:59,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:00,316 INFO L124 PetriNetUnfolderBase]: 3088/4638 cut-off events. [2024-06-04 15:43:00,316 INFO L125 PetriNetUnfolderBase]: For 294716/294716 co-relation queries the response was YES. [2024-06-04 15:43:00,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36017 conditions, 4638 events. 3088/4638 cut-off events. For 294716/294716 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 23399 event pairs, 559 based on Foata normal form. 4/4642 useless extension candidates. Maximal degree in co-relation 35906. Up to 4242 conditions per place. [2024-06-04 15:43:00,360 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 284 selfloop transitions, 61 changer transitions 0/348 dead transitions. [2024-06-04 15:43:00,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 348 transitions, 4387 flow [2024-06-04 15:43:00,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:43:00,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:43:00,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-04 15:43:00,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 15:43:00,362 INFO L175 Difference]: Start difference. First operand has 232 places, 279 transitions, 3146 flow. Second operand 10 states and 170 transitions. [2024-06-04 15:43:00,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 348 transitions, 4387 flow [2024-06-04 15:43:00,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 348 transitions, 4294 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 15:43:00,974 INFO L231 Difference]: Finished difference. Result has 237 places, 305 transitions, 3633 flow [2024-06-04 15:43:00,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3053, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3633, PETRI_PLACES=237, PETRI_TRANSITIONS=305} [2024-06-04 15:43:00,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-04 15:43:00,974 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 305 transitions, 3633 flow [2024-06-04 15:43:00,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:00,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:00,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:00,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 15:43:00,975 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:00,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:00,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1067955005, now seen corresponding path program 2 times [2024-06-04 15:43:00,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:00,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826463575] [2024-06-04 15:43:00,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:00,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:02,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:02,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:02,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826463575] [2024-06-04 15:43:02,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826463575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:02,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:02,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:43:02,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739980850] [2024-06-04 15:43:02,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:02,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:43:02,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:02,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:43:02,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:43:02,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:43:02,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 305 transitions, 3633 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:02,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:02,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:43:02,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:03,827 INFO L124 PetriNetUnfolderBase]: 3185/4795 cut-off events. [2024-06-04 15:43:03,827 INFO L125 PetriNetUnfolderBase]: For 329859/329859 co-relation queries the response was YES. [2024-06-04 15:43:03,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37444 conditions, 4795 events. 3185/4795 cut-off events. For 329859/329859 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24487 event pairs, 574 based on Foata normal form. 20/4815 useless extension candidates. Maximal degree in co-relation 37329. Up to 4274 conditions per place. [2024-06-04 15:43:03,879 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 295 selfloop transitions, 63 changer transitions 0/361 dead transitions. [2024-06-04 15:43:03,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 361 transitions, 4631 flow [2024-06-04 15:43:03,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:43:03,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:43:03,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-04 15:43:03,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-04 15:43:03,881 INFO L175 Difference]: Start difference. First operand has 237 places, 305 transitions, 3633 flow. Second operand 11 states and 188 transitions. [2024-06-04 15:43:03,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 361 transitions, 4631 flow [2024-06-04 15:43:04,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 361 transitions, 4491 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-04 15:43:04,543 INFO L231 Difference]: Finished difference. Result has 244 places, 309 transitions, 3685 flow [2024-06-04 15:43:04,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3493, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3685, PETRI_PLACES=244, PETRI_TRANSITIONS=309} [2024-06-04 15:43:04,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-04 15:43:04,544 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 309 transitions, 3685 flow [2024-06-04 15:43:04,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:04,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:04,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:04,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 15:43:04,544 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:04,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:04,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1068108827, now seen corresponding path program 6 times [2024-06-04 15:43:04,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:04,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010516778] [2024-06-04 15:43:04,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:04,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:05,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:05,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:05,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010516778] [2024-06-04 15:43:05,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010516778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:05,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:05,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:43:05,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839010679] [2024-06-04 15:43:05,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:05,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:43:05,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:05,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:43:05,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:43:06,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:43:06,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 309 transitions, 3685 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:06,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:06,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:43:06,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:07,269 INFO L124 PetriNetUnfolderBase]: 3244/4888 cut-off events. [2024-06-04 15:43:07,270 INFO L125 PetriNetUnfolderBase]: For 330726/330726 co-relation queries the response was YES. [2024-06-04 15:43:07,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38656 conditions, 4888 events. 3244/4888 cut-off events. For 330726/330726 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 25133 event pairs, 579 based on Foata normal form. 4/4892 useless extension candidates. Maximal degree in co-relation 38539. Up to 4427 conditions per place. [2024-06-04 15:43:07,324 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 291 selfloop transitions, 65 changer transitions 0/359 dead transitions. [2024-06-04 15:43:07,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 359 transitions, 4926 flow [2024-06-04 15:43:07,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:43:07,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:43:07,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-04 15:43:07,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-04 15:43:07,325 INFO L175 Difference]: Start difference. First operand has 244 places, 309 transitions, 3685 flow. Second operand 10 states and 172 transitions. [2024-06-04 15:43:07,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 359 transitions, 4926 flow [2024-06-04 15:43:07,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 359 transitions, 4785 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-04 15:43:07,915 INFO L231 Difference]: Finished difference. Result has 247 places, 314 transitions, 3831 flow [2024-06-04 15:43:07,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3544, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3831, PETRI_PLACES=247, PETRI_TRANSITIONS=314} [2024-06-04 15:43:07,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-04 15:43:07,916 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 314 transitions, 3831 flow [2024-06-04 15:43:07,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:07,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:07,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:07,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 15:43:07,916 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:07,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:07,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1062598577, now seen corresponding path program 7 times [2024-06-04 15:43:07,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:07,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482284756] [2024-06-04 15:43:07,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:07,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:09,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:09,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482284756] [2024-06-04 15:43:09,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482284756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:09,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:09,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:43:09,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253401213] [2024-06-04 15:43:09,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:09,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:43:09,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:09,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:43:09,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:43:09,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:43:09,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 314 transitions, 3831 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:09,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:09,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:43:09,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:10,480 INFO L124 PetriNetUnfolderBase]: 3236/4876 cut-off events. [2024-06-04 15:43:10,480 INFO L125 PetriNetUnfolderBase]: For 336989/336989 co-relation queries the response was YES. [2024-06-04 15:43:10,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38607 conditions, 4876 events. 3236/4876 cut-off events. For 336989/336989 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 25067 event pairs, 583 based on Foata normal form. 4/4880 useless extension candidates. Maximal degree in co-relation 38488. Up to 4480 conditions per place. [2024-06-04 15:43:10,534 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 293 selfloop transitions, 63 changer transitions 0/359 dead transitions. [2024-06-04 15:43:10,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 359 transitions, 4775 flow [2024-06-04 15:43:10,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:43:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:43:10,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-04 15:43:10,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 15:43:10,535 INFO L175 Difference]: Start difference. First operand has 247 places, 314 transitions, 3831 flow. Second operand 10 states and 170 transitions. [2024-06-04 15:43:10,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 359 transitions, 4775 flow [2024-06-04 15:43:11,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 359 transitions, 4538 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-04 15:43:11,100 INFO L231 Difference]: Finished difference. Result has 251 places, 318 transitions, 3848 flow [2024-06-04 15:43:11,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3624, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3848, PETRI_PLACES=251, PETRI_TRANSITIONS=318} [2024-06-04 15:43:11,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-04 15:43:11,100 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 318 transitions, 3848 flow [2024-06-04 15:43:11,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:11,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:11,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:11,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 15:43:11,101 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:11,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:11,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1062383375, now seen corresponding path program 3 times [2024-06-04 15:43:11,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:11,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264934332] [2024-06-04 15:43:11,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:11,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:12,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:12,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264934332] [2024-06-04 15:43:12,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264934332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:12,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:12,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:43:12,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076391235] [2024-06-04 15:43:12,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:12,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:43:12,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:12,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:43:12,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:43:12,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:43:12,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 318 transitions, 3848 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:12,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:12,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:43:12,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:13,530 INFO L124 PetriNetUnfolderBase]: 3405/5159 cut-off events. [2024-06-04 15:43:13,530 INFO L125 PetriNetUnfolderBase]: For 392622/392622 co-relation queries the response was YES. [2024-06-04 15:43:13,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41367 conditions, 5159 events. 3405/5159 cut-off events. For 392622/392622 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 26999 event pairs, 448 based on Foata normal form. 16/5175 useless extension candidates. Maximal degree in co-relation 41245. Up to 3475 conditions per place. [2024-06-04 15:43:13,590 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 222 selfloop transitions, 140 changer transitions 0/365 dead transitions. [2024-06-04 15:43:13,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 365 transitions, 5020 flow [2024-06-04 15:43:13,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:13,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:13,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-04 15:43:13,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-04 15:43:13,592 INFO L175 Difference]: Start difference. First operand has 251 places, 318 transitions, 3848 flow. Second operand 9 states and 165 transitions. [2024-06-04 15:43:13,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 365 transitions, 5020 flow [2024-06-04 15:43:14,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 365 transitions, 4936 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 15:43:14,085 INFO L231 Difference]: Finished difference. Result has 255 places, 320 transitions, 4124 flow [2024-06-04 15:43:14,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3764, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4124, PETRI_PLACES=255, PETRI_TRANSITIONS=320} [2024-06-04 15:43:14,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-04 15:43:14,085 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 320 transitions, 4124 flow [2024-06-04 15:43:14,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:14,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:14,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:14,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 15:43:14,086 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:14,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:14,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1542633577, now seen corresponding path program 4 times [2024-06-04 15:43:14,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:14,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340984868] [2024-06-04 15:43:14,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:14,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:15,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:15,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340984868] [2024-06-04 15:43:15,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340984868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:15,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:15,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:43:15,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353888249] [2024-06-04 15:43:15,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:15,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:43:15,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:15,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:43:15,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:43:15,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:43:15,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 320 transitions, 4124 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:15,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:15,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:43:15,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:16,646 INFO L124 PetriNetUnfolderBase]: 3480/5284 cut-off events. [2024-06-04 15:43:16,646 INFO L125 PetriNetUnfolderBase]: For 416532/416532 co-relation queries the response was YES. [2024-06-04 15:43:16,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43059 conditions, 5284 events. 3480/5284 cut-off events. For 416532/416532 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 27926 event pairs, 629 based on Foata normal form. 20/5304 useless extension candidates. Maximal degree in co-relation 42936. Up to 4142 conditions per place. [2024-06-04 15:43:16,701 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 222 selfloop transitions, 135 changer transitions 0/360 dead transitions. [2024-06-04 15:43:16,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 360 transitions, 5018 flow [2024-06-04 15:43:16,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:16,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:16,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-04 15:43:16,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-04 15:43:16,702 INFO L175 Difference]: Start difference. First operand has 255 places, 320 transitions, 4124 flow. Second operand 9 states and 159 transitions. [2024-06-04 15:43:16,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 360 transitions, 5018 flow [2024-06-04 15:43:17,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 360 transitions, 4797 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-04 15:43:17,258 INFO L231 Difference]: Finished difference. Result has 259 places, 321 transitions, 4220 flow [2024-06-04 15:43:17,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3913, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4220, PETRI_PLACES=259, PETRI_TRANSITIONS=321} [2024-06-04 15:43:17,258 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-04 15:43:17,258 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 321 transitions, 4220 flow [2024-06-04 15:43:17,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:17,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:17,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:17,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 15:43:17,259 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:17,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:17,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1542431767, now seen corresponding path program 5 times [2024-06-04 15:43:17,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:17,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822451237] [2024-06-04 15:43:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:17,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:18,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:18,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822451237] [2024-06-04 15:43:18,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822451237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:18,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:18,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:43:18,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136349622] [2024-06-04 15:43:18,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:18,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:43:18,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:18,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:43:18,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:43:18,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:43:18,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 321 transitions, 4220 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:18,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:18,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:43:18,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:20,024 INFO L124 PetriNetUnfolderBase]: 3577/5437 cut-off events. [2024-06-04 15:43:20,024 INFO L125 PetriNetUnfolderBase]: For 426331/426331 co-relation queries the response was YES. [2024-06-04 15:43:20,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44138 conditions, 5437 events. 3577/5437 cut-off events. For 426331/426331 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29081 event pairs, 666 based on Foata normal form. 20/5457 useless extension candidates. Maximal degree in co-relation 44013. Up to 4916 conditions per place. [2024-06-04 15:43:20,085 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 307 selfloop transitions, 65 changer transitions 0/375 dead transitions. [2024-06-04 15:43:20,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 375 transitions, 5199 flow [2024-06-04 15:43:20,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:43:20,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:43:20,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-04 15:43:20,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-04 15:43:20,086 INFO L175 Difference]: Start difference. First operand has 259 places, 321 transitions, 4220 flow. Second operand 11 states and 188 transitions. [2024-06-04 15:43:20,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 375 transitions, 5199 flow [2024-06-04 15:43:20,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 375 transitions, 4910 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 15:43:20,775 INFO L231 Difference]: Finished difference. Result has 264 places, 325 transitions, 4134 flow [2024-06-04 15:43:20,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3937, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4134, PETRI_PLACES=264, PETRI_TRANSITIONS=325} [2024-06-04 15:43:20,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-04 15:43:20,776 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 325 transitions, 4134 flow [2024-06-04 15:43:20,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:20,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:20,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:20,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 15:43:20,776 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:20,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:20,777 INFO L85 PathProgramCache]: Analyzing trace with hash -720921137, now seen corresponding path program 8 times [2024-06-04 15:43:20,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:20,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051701209] [2024-06-04 15:43:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:20,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:22,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:22,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051701209] [2024-06-04 15:43:22,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051701209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:22,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:22,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:43:22,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843144584] [2024-06-04 15:43:22,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:22,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:43:22,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:22,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:43:22,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:43:22,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:43:22,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 325 transitions, 4134 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:22,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:22,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:43:22,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:23,456 INFO L124 PetriNetUnfolderBase]: 3834/5852 cut-off events. [2024-06-04 15:43:23,457 INFO L125 PetriNetUnfolderBase]: For 467839/467841 co-relation queries the response was YES. [2024-06-04 15:43:23,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46318 conditions, 5852 events. 3834/5852 cut-off events. For 467839/467841 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 31987 event pairs, 788 based on Foata normal form. 38/5890 useless extension candidates. Maximal degree in co-relation 46191. Up to 5297 conditions per place. [2024-06-04 15:43:23,526 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 332 selfloop transitions, 51 changer transitions 0/386 dead transitions. [2024-06-04 15:43:23,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 386 transitions, 5368 flow [2024-06-04 15:43:23,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:43:23,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:43:23,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-04 15:43:23,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 15:43:23,528 INFO L175 Difference]: Start difference. First operand has 264 places, 325 transitions, 4134 flow. Second operand 10 states and 170 transitions. [2024-06-04 15:43:23,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 386 transitions, 5368 flow [2024-06-04 15:43:24,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 386 transitions, 5215 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 15:43:24,217 INFO L231 Difference]: Finished difference. Result has 268 places, 340 transitions, 4403 flow [2024-06-04 15:43:24,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3993, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4403, PETRI_PLACES=268, PETRI_TRANSITIONS=340} [2024-06-04 15:43:24,217 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-04 15:43:24,217 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 340 transitions, 4403 flow [2024-06-04 15:43:24,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:24,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:24,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:24,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 15:43:24,218 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:24,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:24,218 INFO L85 PathProgramCache]: Analyzing trace with hash -48564653, now seen corresponding path program 9 times [2024-06-04 15:43:24,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:24,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455498721] [2024-06-04 15:43:24,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:24,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:25,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:25,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455498721] [2024-06-04 15:43:25,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455498721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:25,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:25,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:43:25,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541568175] [2024-06-04 15:43:25,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:25,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:43:25,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:25,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:43:25,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:43:25,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:43:25,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 340 transitions, 4403 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:25,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:25,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:43:25,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:27,029 INFO L124 PetriNetUnfolderBase]: 3931/6009 cut-off events. [2024-06-04 15:43:27,029 INFO L125 PetriNetUnfolderBase]: For 456830/456832 co-relation queries the response was YES. [2024-06-04 15:43:27,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47617 conditions, 6009 events. 3931/6009 cut-off events. For 456830/456832 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 33125 event pairs, 784 based on Foata normal form. 18/6027 useless extension candidates. Maximal degree in co-relation 47487. Up to 5317 conditions per place. [2024-06-04 15:43:27,090 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 338 selfloop transitions, 55 changer transitions 0/396 dead transitions. [2024-06-04 15:43:27,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 396 transitions, 5556 flow [2024-06-04 15:43:27,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:43:27,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:43:27,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-04 15:43:27,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-04 15:43:27,091 INFO L175 Difference]: Start difference. First operand has 268 places, 340 transitions, 4403 flow. Second operand 10 states and 173 transitions. [2024-06-04 15:43:27,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 396 transitions, 5556 flow [2024-06-04 15:43:27,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 396 transitions, 5454 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 15:43:27,665 INFO L231 Difference]: Finished difference. Result has 273 places, 346 transitions, 4551 flow [2024-06-04 15:43:27,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4301, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4551, PETRI_PLACES=273, PETRI_TRANSITIONS=346} [2024-06-04 15:43:27,665 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-04 15:43:27,666 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 346 transitions, 4551 flow [2024-06-04 15:43:27,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:27,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:27,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:27,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 15:43:27,666 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:27,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:27,667 INFO L85 PathProgramCache]: Analyzing trace with hash 936567759, now seen corresponding path program 10 times [2024-06-04 15:43:27,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:27,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226368203] [2024-06-04 15:43:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:27,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:28,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:28,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226368203] [2024-06-04 15:43:28,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226368203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:28,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:28,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:43:28,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596481329] [2024-06-04 15:43:28,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:28,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:43:28,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:28,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:43:28,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:43:28,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:43:28,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 346 transitions, 4551 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:28,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:28,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:43:28,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:30,340 INFO L124 PetriNetUnfolderBase]: 4090/6272 cut-off events. [2024-06-04 15:43:30,341 INFO L125 PetriNetUnfolderBase]: For 475666/475668 co-relation queries the response was YES. [2024-06-04 15:43:30,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49416 conditions, 6272 events. 4090/6272 cut-off events. For 475666/475668 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 35137 event pairs, 803 based on Foata normal form. 18/6290 useless extension candidates. Maximal degree in co-relation 49284. Up to 5819 conditions per place. [2024-06-04 15:43:30,415 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 53 changer transitions 0/408 dead transitions. [2024-06-04 15:43:30,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 408 transitions, 5831 flow [2024-06-04 15:43:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:43:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:43:30,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-04 15:43:30,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-04 15:43:30,416 INFO L175 Difference]: Start difference. First operand has 273 places, 346 transitions, 4551 flow. Second operand 10 states and 164 transitions. [2024-06-04 15:43:30,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 408 transitions, 5831 flow [2024-06-04 15:43:31,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 408 transitions, 5738 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 15:43:31,089 INFO L231 Difference]: Finished difference. Result has 279 places, 364 transitions, 4905 flow [2024-06-04 15:43:31,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4458, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4905, PETRI_PLACES=279, PETRI_TRANSITIONS=364} [2024-06-04 15:43:31,090 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-04 15:43:31,090 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 364 transitions, 4905 flow [2024-06-04 15:43:31,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:31,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:31,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:31,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 15:43:31,090 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:31,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:31,091 INFO L85 PathProgramCache]: Analyzing trace with hash 558364913, now seen corresponding path program 11 times [2024-06-04 15:43:31,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:31,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561807053] [2024-06-04 15:43:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:31,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:32,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:32,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561807053] [2024-06-04 15:43:32,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561807053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:32,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:32,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:43:32,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151187751] [2024-06-04 15:43:32,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:32,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:43:32,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:32,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:43:32,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:43:32,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:43:32,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 364 transitions, 4905 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:32,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:32,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:43:32,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:34,156 INFO L124 PetriNetUnfolderBase]: 4107/6297 cut-off events. [2024-06-04 15:43:34,156 INFO L125 PetriNetUnfolderBase]: For 472578/472580 co-relation queries the response was YES. [2024-06-04 15:43:34,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50453 conditions, 6297 events. 4107/6297 cut-off events. For 472578/472580 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 35269 event pairs, 817 based on Foata normal form. 6/6303 useless extension candidates. Maximal degree in co-relation 50317. Up to 5763 conditions per place. [2024-06-04 15:43:34,373 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 333 selfloop transitions, 67 changer transitions 0/403 dead transitions. [2024-06-04 15:43:34,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 403 transitions, 6004 flow [2024-06-04 15:43:34,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:34,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:34,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-04 15:43:34,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-04 15:43:34,374 INFO L175 Difference]: Start difference. First operand has 279 places, 364 transitions, 4905 flow. Second operand 9 states and 147 transitions. [2024-06-04 15:43:34,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 403 transitions, 6004 flow [2024-06-04 15:43:35,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 403 transitions, 5792 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-04 15:43:35,279 INFO L231 Difference]: Finished difference. Result has 283 places, 369 transitions, 5055 flow [2024-06-04 15:43:35,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4715, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5055, PETRI_PLACES=283, PETRI_TRANSITIONS=369} [2024-06-04 15:43:35,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-04 15:43:35,280 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 369 transitions, 5055 flow [2024-06-04 15:43:35,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:35,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:35,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:35,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 15:43:35,280 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:35,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:35,281 INFO L85 PathProgramCache]: Analyzing trace with hash 560242583, now seen corresponding path program 12 times [2024-06-04 15:43:35,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:35,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001942174] [2024-06-04 15:43:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:35,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:36,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:36,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001942174] [2024-06-04 15:43:36,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001942174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:36,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:36,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:43:36,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580669888] [2024-06-04 15:43:36,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:36,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:43:36,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:36,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:43:36,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:43:36,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:43:36,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 369 transitions, 5055 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:36,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:36,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:43:36,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:38,207 INFO L124 PetriNetUnfolderBase]: 4124/6336 cut-off events. [2024-06-04 15:43:38,208 INFO L125 PetriNetUnfolderBase]: For 488349/488351 co-relation queries the response was YES. [2024-06-04 15:43:38,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51331 conditions, 6336 events. 4124/6336 cut-off events. For 488349/488351 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35763 event pairs, 990 based on Foata normal form. 6/6342 useless extension candidates. Maximal degree in co-relation 51193. Up to 5938 conditions per place. [2024-06-04 15:43:38,291 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 346 selfloop transitions, 57 changer transitions 0/406 dead transitions. [2024-06-04 15:43:38,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 406 transitions, 6092 flow [2024-06-04 15:43:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:38,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:38,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-04 15:43:38,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-04 15:43:38,292 INFO L175 Difference]: Start difference. First operand has 283 places, 369 transitions, 5055 flow. Second operand 9 states and 149 transitions. [2024-06-04 15:43:38,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 406 transitions, 6092 flow [2024-06-04 15:43:39,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 406 transitions, 5905 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-04 15:43:39,478 INFO L231 Difference]: Finished difference. Result has 287 places, 372 transitions, 5111 flow [2024-06-04 15:43:39,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4872, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5111, PETRI_PLACES=287, PETRI_TRANSITIONS=372} [2024-06-04 15:43:39,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-04 15:43:39,479 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 372 transitions, 5111 flow [2024-06-04 15:43:39,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:39,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:39,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:39,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 15:43:39,479 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:39,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:39,480 INFO L85 PathProgramCache]: Analyzing trace with hash 643355753, now seen corresponding path program 13 times [2024-06-04 15:43:39,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:39,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489078144] [2024-06-04 15:43:39,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:39,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:40,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:40,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489078144] [2024-06-04 15:43:40,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489078144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:40,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:40,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:43:40,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891717356] [2024-06-04 15:43:40,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:40,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:43:40,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:40,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:43:40,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:43:40,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:43:40,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 372 transitions, 5111 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:40,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:40,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:43:40,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:42,576 INFO L124 PetriNetUnfolderBase]: 4141/6361 cut-off events. [2024-06-04 15:43:42,576 INFO L125 PetriNetUnfolderBase]: For 470758/470760 co-relation queries the response was YES. [2024-06-04 15:43:42,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51179 conditions, 6361 events. 4141/6361 cut-off events. For 470758/470760 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35970 event pairs, 944 based on Foata normal form. 6/6367 useless extension candidates. Maximal degree in co-relation 51039. Up to 5819 conditions per place. [2024-06-04 15:43:42,644 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 341 selfloop transitions, 67 changer transitions 0/411 dead transitions. [2024-06-04 15:43:42,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 411 transitions, 6208 flow [2024-06-04 15:43:42,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-04 15:43:42,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-04 15:43:42,645 INFO L175 Difference]: Start difference. First operand has 287 places, 372 transitions, 5111 flow. Second operand 9 states and 150 transitions. [2024-06-04 15:43:42,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 411 transitions, 6208 flow [2024-06-04 15:43:43,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 411 transitions, 6016 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-04 15:43:43,388 INFO L231 Difference]: Finished difference. Result has 290 places, 377 transitions, 5256 flow [2024-06-04 15:43:43,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4919, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5256, PETRI_PLACES=290, PETRI_TRANSITIONS=377} [2024-06-04 15:43:43,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-04 15:43:43,388 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 377 transitions, 5256 flow [2024-06-04 15:43:43,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:43,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:43,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:43,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 15:43:43,389 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:43,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:43,389 INFO L85 PathProgramCache]: Analyzing trace with hash 872609243, now seen corresponding path program 6 times [2024-06-04 15:43:43,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:43,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442725825] [2024-06-04 15:43:43,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:43,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:44,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:44,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442725825] [2024-06-04 15:43:44,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442725825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:44,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:44,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:43:44,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114845879] [2024-06-04 15:43:44,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:44,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:43:44,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:44,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:43:44,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:43:44,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:43:44,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 377 transitions, 5256 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:44,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:44,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:43:44,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:46,542 INFO L124 PetriNetUnfolderBase]: 4216/6486 cut-off events. [2024-06-04 15:43:46,542 INFO L125 PetriNetUnfolderBase]: For 514262/514264 co-relation queries the response was YES. [2024-06-04 15:43:46,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52116 conditions, 6486 events. 4216/6486 cut-off events. For 514262/514264 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 36878 event pairs, 933 based on Foata normal form. 22/6508 useless extension candidates. Maximal degree in co-relation 51974. Up to 5644 conditions per place. [2024-06-04 15:43:46,633 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 351 selfloop transitions, 67 changer transitions 0/421 dead transitions. [2024-06-04 15:43:46,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 421 transitions, 6294 flow [2024-06-04 15:43:46,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:43:46,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:43:46,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-04 15:43:46,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-04 15:43:46,634 INFO L175 Difference]: Start difference. First operand has 290 places, 377 transitions, 5256 flow. Second operand 10 states and 167 transitions. [2024-06-04 15:43:46,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 421 transitions, 6294 flow [2024-06-04 15:43:47,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 421 transitions, 6086 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-04 15:43:47,814 INFO L231 Difference]: Finished difference. Result has 295 places, 378 transitions, 5234 flow [2024-06-04 15:43:47,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5048, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5234, PETRI_PLACES=295, PETRI_TRANSITIONS=378} [2024-06-04 15:43:47,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-04 15:43:47,815 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 378 transitions, 5234 flow [2024-06-04 15:43:47,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:47,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:47,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:47,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 15:43:47,816 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:47,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:47,816 INFO L85 PathProgramCache]: Analyzing trace with hash 133084089, now seen corresponding path program 14 times [2024-06-04 15:43:47,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:47,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703984748] [2024-06-04 15:43:47,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:47,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:49,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:49,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703984748] [2024-06-04 15:43:49,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703984748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:49,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:49,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:43:49,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860217720] [2024-06-04 15:43:49,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:49,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:43:49,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:49,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:43:49,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:43:49,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:43:49,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 378 transitions, 5234 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:49,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:49,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:43:49,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:50,876 INFO L124 PetriNetUnfolderBase]: 4233/6501 cut-off events. [2024-06-04 15:43:50,877 INFO L125 PetriNetUnfolderBase]: For 481783/481783 co-relation queries the response was YES. [2024-06-04 15:43:50,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52220 conditions, 6501 events. 4233/6501 cut-off events. For 481783/481783 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 36881 event pairs, 832 based on Foata normal form. 4/6505 useless extension candidates. Maximal degree in co-relation 52076. Up to 5889 conditions per place. [2024-06-04 15:43:50,963 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 324 selfloop transitions, 87 changer transitions 0/414 dead transitions. [2024-06-04 15:43:50,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 414 transitions, 6262 flow [2024-06-04 15:43:50,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:50,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:50,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-04 15:43:50,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-04 15:43:50,964 INFO L175 Difference]: Start difference. First operand has 295 places, 378 transitions, 5234 flow. Second operand 9 states and 152 transitions. [2024-06-04 15:43:50,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 414 transitions, 6262 flow [2024-06-04 15:43:52,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 414 transitions, 6112 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-04 15:43:52,276 INFO L231 Difference]: Finished difference. Result has 296 places, 380 transitions, 5356 flow [2024-06-04 15:43:52,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5084, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5356, PETRI_PLACES=296, PETRI_TRANSITIONS=380} [2024-06-04 15:43:52,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-04 15:43:52,277 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 380 transitions, 5356 flow [2024-06-04 15:43:52,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:52,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:52,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:52,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 15:43:52,277 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:52,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:52,277 INFO L85 PathProgramCache]: Analyzing trace with hash 133080369, now seen corresponding path program 15 times [2024-06-04 15:43:52,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:52,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899956330] [2024-06-04 15:43:52,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:52,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:53,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:53,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899956330] [2024-06-04 15:43:53,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899956330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:53,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:53,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:43:53,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468148282] [2024-06-04 15:43:53,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:53,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:43:53,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:53,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:43:53,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:43:53,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:43:53,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 380 transitions, 5356 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:53,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:53,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:43:53,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:55,488 INFO L124 PetriNetUnfolderBase]: 4275/6567 cut-off events. [2024-06-04 15:43:55,488 INFO L125 PetriNetUnfolderBase]: For 509272/509272 co-relation queries the response was YES. [2024-06-04 15:43:55,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53528 conditions, 6567 events. 4275/6567 cut-off events. For 509272/509272 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 37357 event pairs, 832 based on Foata normal form. 4/6571 useless extension candidates. Maximal degree in co-relation 53383. Up to 5831 conditions per place. [2024-06-04 15:43:55,559 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 322 selfloop transitions, 96 changer transitions 0/421 dead transitions. [2024-06-04 15:43:55,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 421 transitions, 6738 flow [2024-06-04 15:43:55,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:43:55,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:43:55,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-04 15:43:55,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-04 15:43:55,560 INFO L175 Difference]: Start difference. First operand has 296 places, 380 transitions, 5356 flow. Second operand 9 states and 154 transitions. [2024-06-04 15:43:55,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 421 transitions, 6738 flow [2024-06-04 15:43:56,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 421 transitions, 6498 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-04 15:43:56,487 INFO L231 Difference]: Finished difference. Result has 299 places, 385 transitions, 5523 flow [2024-06-04 15:43:56,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5116, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5523, PETRI_PLACES=299, PETRI_TRANSITIONS=385} [2024-06-04 15:43:56,488 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-04 15:43:56,488 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 385 transitions, 5523 flow [2024-06-04 15:43:56,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:56,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:43:56,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:43:56,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 15:43:56,488 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:43:56,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:43:56,489 INFO L85 PathProgramCache]: Analyzing trace with hash 133234191, now seen corresponding path program 7 times [2024-06-04 15:43:56,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:43:56,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467140293] [2024-06-04 15:43:56,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:43:56,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:43:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:43:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:43:57,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:43:57,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467140293] [2024-06-04 15:43:57,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467140293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:43:57,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:43:57,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:43:57,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483755918] [2024-06-04 15:43:57,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:43:57,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:43:57,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:43:57,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:43:57,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:43:57,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:43:57,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 385 transitions, 5523 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:43:57,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:43:57,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:43:57,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:43:59,711 INFO L124 PetriNetUnfolderBase]: 4350/6692 cut-off events. [2024-06-04 15:43:59,711 INFO L125 PetriNetUnfolderBase]: For 555816/555816 co-relation queries the response was YES. [2024-06-04 15:43:59,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54633 conditions, 6692 events. 4350/6692 cut-off events. For 555816/555816 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 38225 event pairs, 844 based on Foata normal form. 20/6712 useless extension candidates. Maximal degree in co-relation 54486. Up to 5784 conditions per place. [2024-06-04 15:43:59,798 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 334 selfloop transitions, 97 changer transitions 0/434 dead transitions. [2024-06-04 15:43:59,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 434 transitions, 6607 flow [2024-06-04 15:43:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:43:59,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:43:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-04 15:43:59,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-04 15:43:59,806 INFO L175 Difference]: Start difference. First operand has 299 places, 385 transitions, 5523 flow. Second operand 11 states and 185 transitions. [2024-06-04 15:43:59,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 434 transitions, 6607 flow [2024-06-04 15:44:00,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 434 transitions, 6384 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-04 15:44:00,922 INFO L231 Difference]: Finished difference. Result has 304 places, 386 transitions, 5542 flow [2024-06-04 15:44:00,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5300, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5542, PETRI_PLACES=304, PETRI_TRANSITIONS=386} [2024-06-04 15:44:00,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-04 15:44:00,922 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 386 transitions, 5542 flow [2024-06-04 15:44:00,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:00,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:00,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:00,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 15:44:00,923 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:00,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:00,923 INFO L85 PathProgramCache]: Analyzing trace with hash 157024645, now seen corresponding path program 16 times [2024-06-04 15:44:00,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:00,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930961665] [2024-06-04 15:44:00,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:00,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:02,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:02,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930961665] [2024-06-04 15:44:02,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930961665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:02,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:02,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:44:02,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312959101] [2024-06-04 15:44:02,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:02,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:44:02,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:02,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:44:02,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:44:02,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:44:02,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 386 transitions, 5542 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:02,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:02,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:44:02,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:03,893 INFO L124 PetriNetUnfolderBase]: 4342/6680 cut-off events. [2024-06-04 15:44:03,893 INFO L125 PetriNetUnfolderBase]: For 513155/513155 co-relation queries the response was YES. [2024-06-04 15:44:03,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54194 conditions, 6680 events. 4342/6680 cut-off events. For 513155/513155 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 38286 event pairs, 856 based on Foata normal form. 4/6684 useless extension candidates. Maximal degree in co-relation 54046. Up to 6068 conditions per place. [2024-06-04 15:44:03,991 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 328 selfloop transitions, 91 changer transitions 0/422 dead transitions. [2024-06-04 15:44:03,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 422 transitions, 6537 flow [2024-06-04 15:44:03,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:44:03,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:44:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-04 15:44:03,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-04 15:44:03,993 INFO L175 Difference]: Start difference. First operand has 304 places, 386 transitions, 5542 flow. Second operand 9 states and 152 transitions. [2024-06-04 15:44:03,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 422 transitions, 6537 flow [2024-06-04 15:44:05,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 422 transitions, 6265 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-04 15:44:05,312 INFO L231 Difference]: Finished difference. Result has 304 places, 387 transitions, 5495 flow [2024-06-04 15:44:05,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5290, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5495, PETRI_PLACES=304, PETRI_TRANSITIONS=387} [2024-06-04 15:44:05,313 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-04 15:44:05,313 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 387 transitions, 5495 flow [2024-06-04 15:44:05,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:05,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:05,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:05,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 15:44:05,313 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:05,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:05,314 INFO L85 PathProgramCache]: Analyzing trace with hash 157030597, now seen corresponding path program 8 times [2024-06-04 15:44:05,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:05,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070055421] [2024-06-04 15:44:05,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:05,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:06,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:06,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070055421] [2024-06-04 15:44:06,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070055421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:06,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:06,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:44:06,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530483552] [2024-06-04 15:44:06,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:06,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:44:06,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:06,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:44:06,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:44:06,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:44:06,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 387 transitions, 5495 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:06,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:06,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:44:06,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:08,436 INFO L124 PetriNetUnfolderBase]: 4417/6805 cut-off events. [2024-06-04 15:44:08,436 INFO L125 PetriNetUnfolderBase]: For 555756/555756 co-relation queries the response was YES. [2024-06-04 15:44:08,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54794 conditions, 6805 events. 4417/6805 cut-off events. For 555756/555756 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 39196 event pairs, 856 based on Foata normal form. 20/6825 useless extension candidates. Maximal degree in co-relation 54645. Up to 5943 conditions per place. [2024-06-04 15:44:08,535 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 334 selfloop transitions, 95 changer transitions 0/432 dead transitions. [2024-06-04 15:44:08,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 432 transitions, 6563 flow [2024-06-04 15:44:08,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:44:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:44:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-04 15:44:08,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 15:44:08,536 INFO L175 Difference]: Start difference. First operand has 304 places, 387 transitions, 5495 flow. Second operand 10 states and 170 transitions. [2024-06-04 15:44:08,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 432 transitions, 6563 flow [2024-06-04 15:44:09,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 432 transitions, 6379 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 15:44:09,576 INFO L231 Difference]: Finished difference. Result has 307 places, 388 transitions, 5551 flow [2024-06-04 15:44:09,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5311, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5551, PETRI_PLACES=307, PETRI_TRANSITIONS=388} [2024-06-04 15:44:09,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-04 15:44:09,577 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 388 transitions, 5551 flow [2024-06-04 15:44:09,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:09,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:09,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:09,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 15:44:09,577 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:09,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:09,577 INFO L85 PathProgramCache]: Analyzing trace with hash -571980307, now seen corresponding path program 17 times [2024-06-04 15:44:09,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:09,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160536084] [2024-06-04 15:44:09,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:09,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:10,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:10,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160536084] [2024-06-04 15:44:10,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160536084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:10,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:10,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:44:10,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449004725] [2024-06-04 15:44:10,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:10,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:44:10,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:10,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:44:10,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:44:11,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:44:11,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 388 transitions, 5551 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:11,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:11,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:44:11,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:12,731 INFO L124 PetriNetUnfolderBase]: 4434/6836 cut-off events. [2024-06-04 15:44:12,731 INFO L125 PetriNetUnfolderBase]: For 544671/544673 co-relation queries the response was YES. [2024-06-04 15:44:12,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55464 conditions, 6836 events. 4434/6836 cut-off events. For 544671/544673 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 39459 event pairs, 849 based on Foata normal form. 6/6842 useless extension candidates. Maximal degree in co-relation 55314. Up to 5697 conditions per place. [2024-06-04 15:44:12,815 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 289 selfloop transitions, 133 changer transitions 0/425 dead transitions. [2024-06-04 15:44:12,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 425 transitions, 6609 flow [2024-06-04 15:44:12,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:44:12,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:44:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-04 15:44:12,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-04 15:44:12,816 INFO L175 Difference]: Start difference. First operand has 307 places, 388 transitions, 5551 flow. Second operand 9 states and 158 transitions. [2024-06-04 15:44:12,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 425 transitions, 6609 flow [2024-06-04 15:44:13,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 425 transitions, 6395 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-04 15:44:13,914 INFO L231 Difference]: Finished difference. Result has 308 places, 390 transitions, 5702 flow [2024-06-04 15:44:13,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5337, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5702, PETRI_PLACES=308, PETRI_TRANSITIONS=390} [2024-06-04 15:44:13,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-04 15:44:13,915 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 390 transitions, 5702 flow [2024-06-04 15:44:13,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:13,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:13,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:13,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 15:44:13,916 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:13,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:13,916 INFO L85 PathProgramCache]: Analyzing trace with hash -2065422669, now seen corresponding path program 9 times [2024-06-04 15:44:13,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:13,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388512221] [2024-06-04 15:44:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:13,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:15,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:15,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388512221] [2024-06-04 15:44:15,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388512221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:15,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:15,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:44:15,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130646882] [2024-06-04 15:44:15,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:15,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:44:15,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:15,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:44:15,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:44:15,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:44:15,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 390 transitions, 5702 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:15,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:15,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:44:15,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:17,199 INFO L124 PetriNetUnfolderBase]: 4509/6961 cut-off events. [2024-06-04 15:44:17,199 INFO L125 PetriNetUnfolderBase]: For 578711/578713 co-relation queries the response was YES. [2024-06-04 15:44:17,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56303 conditions, 6961 events. 4509/6961 cut-off events. For 578711/578713 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 40438 event pairs, 859 based on Foata normal form. 22/6983 useless extension candidates. Maximal degree in co-relation 56152. Up to 5702 conditions per place. [2024-06-04 15:44:17,292 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 298 selfloop transitions, 134 changer transitions 0/435 dead transitions. [2024-06-04 15:44:17,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 435 transitions, 6776 flow [2024-06-04 15:44:17,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:44:17,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:44:17,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-04 15:44:17,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-04 15:44:17,293 INFO L175 Difference]: Start difference. First operand has 308 places, 390 transitions, 5702 flow. Second operand 10 states and 177 transitions. [2024-06-04 15:44:17,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 435 transitions, 6776 flow [2024-06-04 15:44:18,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 435 transitions, 6429 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-04 15:44:18,715 INFO L231 Difference]: Finished difference. Result has 311 places, 391 transitions, 5673 flow [2024-06-04 15:44:18,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5355, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5673, PETRI_PLACES=311, PETRI_TRANSITIONS=391} [2024-06-04 15:44:18,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-04 15:44:18,716 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 391 transitions, 5673 flow [2024-06-04 15:44:18,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:18,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:18,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:18,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 15:44:18,716 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:18,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:18,717 INFO L85 PathProgramCache]: Analyzing trace with hash -2070935151, now seen corresponding path program 18 times [2024-06-04 15:44:18,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:18,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162254224] [2024-06-04 15:44:18,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:18,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:20,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:20,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162254224] [2024-06-04 15:44:20,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162254224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:20,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:20,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:44:20,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110806149] [2024-06-04 15:44:20,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:20,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:44:20,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:20,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:44:20,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:44:20,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:44:20,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 391 transitions, 5673 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:20,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:20,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:44:20,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:22,075 INFO L124 PetriNetUnfolderBase]: 4526/6988 cut-off events. [2024-06-04 15:44:22,075 INFO L125 PetriNetUnfolderBase]: For 563989/563991 co-relation queries the response was YES. [2024-06-04 15:44:22,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56700 conditions, 6988 events. 4526/6988 cut-off events. For 563989/563991 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 40648 event pairs, 869 based on Foata normal form. 6/6994 useless extension candidates. Maximal degree in co-relation 56548. Up to 5849 conditions per place. [2024-06-04 15:44:22,153 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 288 selfloop transitions, 135 changer transitions 0/426 dead transitions. [2024-06-04 15:44:22,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 426 transitions, 6731 flow [2024-06-04 15:44:22,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:44:22,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:44:22,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-04 15:44:22,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-04 15:44:22,154 INFO L175 Difference]: Start difference. First operand has 311 places, 391 transitions, 5673 flow. Second operand 9 states and 156 transitions. [2024-06-04 15:44:22,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 426 transitions, 6731 flow [2024-06-04 15:44:23,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 426 transitions, 6443 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-04 15:44:23,189 INFO L231 Difference]: Finished difference. Result has 312 places, 393 transitions, 5758 flow [2024-06-04 15:44:23,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5385, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5758, PETRI_PLACES=312, PETRI_TRANSITIONS=393} [2024-06-04 15:44:23,189 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-04 15:44:23,189 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 393 transitions, 5758 flow [2024-06-04 15:44:23,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:23,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:23,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:23,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 15:44:23,190 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:23,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:23,190 INFO L85 PathProgramCache]: Analyzing trace with hash -2070785049, now seen corresponding path program 10 times [2024-06-04 15:44:23,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:23,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390828879] [2024-06-04 15:44:23,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:23,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:24,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:24,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:24,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390828879] [2024-06-04 15:44:24,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390828879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:24,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:24,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:44:24,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920618396] [2024-06-04 15:44:24,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:24,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:44:24,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:24,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:44:24,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:44:24,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:44:24,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 393 transitions, 5758 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:24,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:24,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:44:24,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:26,463 INFO L124 PetriNetUnfolderBase]: 4601/7113 cut-off events. [2024-06-04 15:44:26,463 INFO L125 PetriNetUnfolderBase]: For 614841/614843 co-relation queries the response was YES. [2024-06-04 15:44:26,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57625 conditions, 7113 events. 4601/7113 cut-off events. For 614841/614843 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 41603 event pairs, 883 based on Foata normal form. 22/7135 useless extension candidates. Maximal degree in co-relation 57472. Up to 6236 conditions per place. [2024-06-04 15:44:26,562 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 333 selfloop transitions, 100 changer transitions 0/436 dead transitions. [2024-06-04 15:44:26,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 436 transitions, 6830 flow [2024-06-04 15:44:26,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:44:26,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:44:26,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-04 15:44:26,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-04 15:44:26,563 INFO L175 Difference]: Start difference. First operand has 312 places, 393 transitions, 5758 flow. Second operand 10 states and 171 transitions. [2024-06-04 15:44:26,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 436 transitions, 6830 flow [2024-06-04 15:44:27,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 436 transitions, 6475 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-04 15:44:27,878 INFO L231 Difference]: Finished difference. Result has 315 places, 394 transitions, 5652 flow [2024-06-04 15:44:27,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5403, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5652, PETRI_PLACES=315, PETRI_TRANSITIONS=394} [2024-06-04 15:44:27,879 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-04 15:44:27,879 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 394 transitions, 5652 flow [2024-06-04 15:44:27,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:27,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:27,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:27,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 15:44:27,879 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:27,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:27,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2070938871, now seen corresponding path program 19 times [2024-06-04 15:44:27,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:27,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667869129] [2024-06-04 15:44:27,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:27,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:29,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:29,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667869129] [2024-06-04 15:44:29,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667869129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:29,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:29,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:44:29,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96222798] [2024-06-04 15:44:29,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:29,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:44:29,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:29,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:44:29,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:44:29,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:44:29,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 394 transitions, 5652 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:29,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:29,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:44:29,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:31,115 INFO L124 PetriNetUnfolderBase]: 4729/7321 cut-off events. [2024-06-04 15:44:31,115 INFO L125 PetriNetUnfolderBase]: For 648980/648982 co-relation queries the response was YES. [2024-06-04 15:44:31,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60496 conditions, 7321 events. 4729/7321 cut-off events. For 648980/648982 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 43187 event pairs, 914 based on Foata normal form. 6/7327 useless extension candidates. Maximal degree in co-relation 60342. Up to 5933 conditions per place. [2024-06-04 15:44:31,216 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 294 selfloop transitions, 141 changer transitions 0/438 dead transitions. [2024-06-04 15:44:31,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 438 transitions, 7132 flow [2024-06-04 15:44:31,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:44:31,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:44:31,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 15:44:31,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 15:44:31,217 INFO L175 Difference]: Start difference. First operand has 315 places, 394 transitions, 5652 flow. Second operand 9 states and 162 transitions. [2024-06-04 15:44:31,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 438 transitions, 7132 flow [2024-06-04 15:44:32,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 438 transitions, 6907 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-04 15:44:32,761 INFO L231 Difference]: Finished difference. Result has 317 places, 399 transitions, 5931 flow [2024-06-04 15:44:32,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5427, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5931, PETRI_PLACES=317, PETRI_TRANSITIONS=399} [2024-06-04 15:44:32,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-04 15:44:32,762 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 399 transitions, 5931 flow [2024-06-04 15:44:32,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:32,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:32,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:32,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 15:44:32,763 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:32,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:32,763 INFO L85 PathProgramCache]: Analyzing trace with hash 67891447, now seen corresponding path program 11 times [2024-06-04 15:44:32,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:32,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873146401] [2024-06-04 15:44:32,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:32,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:33,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:33,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873146401] [2024-06-04 15:44:33,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873146401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:33,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:33,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:44:33,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812155799] [2024-06-04 15:44:33,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:33,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:44:33,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:33,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:44:33,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:44:34,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:44:34,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 399 transitions, 5931 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:34,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:34,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:44:34,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:35,863 INFO L124 PetriNetUnfolderBase]: 4787/7419 cut-off events. [2024-06-04 15:44:35,864 INFO L125 PetriNetUnfolderBase]: For 697578/697580 co-relation queries the response was YES. [2024-06-04 15:44:35,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61724 conditions, 7419 events. 4787/7419 cut-off events. For 697578/697580 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 43938 event pairs, 881 based on Foata normal form. 18/7437 useless extension candidates. Maximal degree in co-relation 61568. Up to 5970 conditions per place. [2024-06-04 15:44:35,958 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 301 selfloop transitions, 142 changer transitions 0/446 dead transitions. [2024-06-04 15:44:35,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 446 transitions, 7382 flow [2024-06-04 15:44:35,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:44:35,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:44:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-04 15:44:35,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-04 15:44:35,959 INFO L175 Difference]: Start difference. First operand has 317 places, 399 transitions, 5931 flow. Second operand 9 states and 166 transitions. [2024-06-04 15:44:35,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 446 transitions, 7382 flow [2024-06-04 15:44:37,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 446 transitions, 7090 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-04 15:44:37,635 INFO L231 Difference]: Finished difference. Result has 322 places, 401 transitions, 6058 flow [2024-06-04 15:44:37,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5659, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6058, PETRI_PLACES=322, PETRI_TRANSITIONS=401} [2024-06-04 15:44:37,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-04 15:44:37,635 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 401 transitions, 6058 flow [2024-06-04 15:44:37,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:37,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:37,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:37,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 15:44:37,636 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:37,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:37,636 INFO L85 PathProgramCache]: Analyzing trace with hash 67884007, now seen corresponding path program 12 times [2024-06-04 15:44:37,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:37,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548184633] [2024-06-04 15:44:37,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:37,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:38,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:38,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548184633] [2024-06-04 15:44:38,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548184633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:38,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:38,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:44:38,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012875188] [2024-06-04 15:44:38,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:38,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:44:38,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:38,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:44:38,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:44:39,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:44:39,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 401 transitions, 6058 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:39,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:39,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:44:39,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:40,881 INFO L124 PetriNetUnfolderBase]: 4751/7363 cut-off events. [2024-06-04 15:44:40,881 INFO L125 PetriNetUnfolderBase]: For 670412/670414 co-relation queries the response was YES. [2024-06-04 15:44:40,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60319 conditions, 7363 events. 4751/7363 cut-off events. For 670412/670414 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 43570 event pairs, 868 based on Foata normal form. 22/7385 useless extension candidates. Maximal degree in co-relation 60160. Up to 6122 conditions per place. [2024-06-04 15:44:40,991 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 290 selfloop transitions, 153 changer transitions 0/446 dead transitions. [2024-06-04 15:44:40,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 446 transitions, 7160 flow [2024-06-04 15:44:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:44:40,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:44:40,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-04 15:44:40,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-04 15:44:40,993 INFO L175 Difference]: Start difference. First operand has 322 places, 401 transitions, 6058 flow. Second operand 10 states and 174 transitions. [2024-06-04 15:44:40,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 446 transitions, 7160 flow [2024-06-04 15:44:42,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 446 transitions, 6833 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 15:44:42,635 INFO L231 Difference]: Finished difference. Result has 326 places, 402 transitions, 6088 flow [2024-06-04 15:44:42,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5732, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6088, PETRI_PLACES=326, PETRI_TRANSITIONS=402} [2024-06-04 15:44:42,636 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-04 15:44:42,636 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 402 transitions, 6088 flow [2024-06-04 15:44:42,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:42,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:42,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:42,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 15:44:42,636 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:42,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:42,636 INFO L85 PathProgramCache]: Analyzing trace with hash 381850147, now seen corresponding path program 13 times [2024-06-04 15:44:42,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:42,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944991275] [2024-06-04 15:44:42,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:42,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:43,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:43,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944991275] [2024-06-04 15:44:43,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944991275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:43,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:43,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:44:43,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278355833] [2024-06-04 15:44:43,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:43,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:44:43,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:43,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:44:43,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:44:44,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:44:44,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 402 transitions, 6088 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:44,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:44,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:44:44,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:45,736 INFO L124 PetriNetUnfolderBase]: 4759/7383 cut-off events. [2024-06-04 15:44:45,736 INFO L125 PetriNetUnfolderBase]: For 657401/657403 co-relation queries the response was YES. [2024-06-04 15:44:45,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59886 conditions, 7383 events. 4759/7383 cut-off events. For 657401/657403 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 43474 event pairs, 697 based on Foata normal form. 18/7401 useless extension candidates. Maximal degree in co-relation 59726. Up to 4266 conditions per place. [2024-06-04 15:44:45,839 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 279 selfloop transitions, 172 changer transitions 0/454 dead transitions. [2024-06-04 15:44:45,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 454 transitions, 7528 flow [2024-06-04 15:44:45,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:44:45,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:44:45,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-04 15:44:45,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 15:44:45,841 INFO L175 Difference]: Start difference. First operand has 326 places, 402 transitions, 6088 flow. Second operand 10 states and 180 transitions. [2024-06-04 15:44:45,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 454 transitions, 7528 flow [2024-06-04 15:44:47,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 454 transitions, 7161 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-04 15:44:47,461 INFO L231 Difference]: Finished difference. Result has 328 places, 403 transitions, 6133 flow [2024-06-04 15:44:47,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5721, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6133, PETRI_PLACES=328, PETRI_TRANSITIONS=403} [2024-06-04 15:44:47,461 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-04 15:44:47,462 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 403 transitions, 6133 flow [2024-06-04 15:44:47,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:47,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:47,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:47,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 15:44:47,462 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:47,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:47,462 INFO L85 PathProgramCache]: Analyzing trace with hash -187634973, now seen corresponding path program 20 times [2024-06-04 15:44:47,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:47,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302948167] [2024-06-04 15:44:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:47,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:48,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:48,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302948167] [2024-06-04 15:44:48,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302948167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:48,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:48,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:44:48,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906111659] [2024-06-04 15:44:48,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:48,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:44:48,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:48,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:44:48,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:44:48,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:44:48,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 403 transitions, 6133 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:48,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:48,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:44:48,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:50,746 INFO L124 PetriNetUnfolderBase]: 4751/7371 cut-off events. [2024-06-04 15:44:50,746 INFO L125 PetriNetUnfolderBase]: For 633774/633776 co-relation queries the response was YES. [2024-06-04 15:44:50,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59630 conditions, 7371 events. 4751/7371 cut-off events. For 633774/633776 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 43725 event pairs, 883 based on Foata normal form. 6/7377 useless extension candidates. Maximal degree in co-relation 59471. Up to 6112 conditions per place. [2024-06-04 15:44:50,851 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 296 selfloop transitions, 142 changer transitions 0/441 dead transitions. [2024-06-04 15:44:50,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 441 transitions, 7161 flow [2024-06-04 15:44:50,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:44:50,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:44:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-04 15:44:50,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-04 15:44:50,856 INFO L175 Difference]: Start difference. First operand has 328 places, 403 transitions, 6133 flow. Second operand 9 states and 160 transitions. [2024-06-04 15:44:50,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 441 transitions, 7161 flow [2024-06-04 15:44:52,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 441 transitions, 6689 flow, removed 65 selfloop flow, removed 8 redundant places. [2024-06-04 15:44:52,482 INFO L231 Difference]: Finished difference. Result has 329 places, 403 transitions, 5955 flow [2024-06-04 15:44:52,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5661, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5955, PETRI_PLACES=329, PETRI_TRANSITIONS=403} [2024-06-04 15:44:52,482 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-04 15:44:52,483 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 403 transitions, 5955 flow [2024-06-04 15:44:52,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:52,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:52,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:52,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 15:44:52,483 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:44:52,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:52,483 INFO L85 PathProgramCache]: Analyzing trace with hash -187629021, now seen corresponding path program 14 times [2024-06-04 15:44:52,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:52,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753403084] [2024-06-04 15:44:52,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:52,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:53,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:53,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753403084] [2024-06-04 15:44:53,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753403084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:53,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:53,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:44:53,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621906716] [2024-06-04 15:44:53,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:53,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:44:53,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:53,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:44:53,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:44:54,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:44:54,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 403 transitions, 5955 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:54,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:54,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:44:54,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:44:55,773 INFO L124 PetriNetUnfolderBase]: 4715/7315 cut-off events. [2024-06-04 15:44:55,773 INFO L125 PetriNetUnfolderBase]: For 628665/628667 co-relation queries the response was YES. [2024-06-04 15:44:55,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57009 conditions, 7315 events. 4715/7315 cut-off events. For 628665/628667 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 43284 event pairs, 865 based on Foata normal form. 22/7337 useless extension candidates. Maximal degree in co-relation 56849. Up to 5936 conditions per place. [2024-06-04 15:44:55,876 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 300 selfloop transitions, 143 changer transitions 0/446 dead transitions. [2024-06-04 15:44:55,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 446 transitions, 7011 flow [2024-06-04 15:44:55,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:44:55,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:44:55,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-04 15:44:55,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 15:44:55,878 INFO L175 Difference]: Start difference. First operand has 329 places, 403 transitions, 5955 flow. Second operand 10 states and 175 transitions. [2024-06-04 15:44:55,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 446 transitions, 7011 flow [2024-06-04 15:44:57,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 446 transitions, 6712 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 15:44:57,581 INFO L231 Difference]: Finished difference. Result has 331 places, 403 transitions, 5955 flow [2024-06-04 15:44:57,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5656, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5955, PETRI_PLACES=331, PETRI_TRANSITIONS=403} [2024-06-04 15:44:57,582 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-04 15:44:57,582 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 403 transitions, 5955 flow [2024-06-04 15:44:57,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:57,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:44:57,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:44:57,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 15:44:57,583 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)] === [2024-06-04 15:44:57,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:44:57,583 INFO L85 PathProgramCache]: Analyzing trace with hash 798194447, now seen corresponding path program 1 times [2024-06-04 15:44:57,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:44:57,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803488687] [2024-06-04 15:44:57,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:44:57,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:44:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:44:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:44:58,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:44:58,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803488687] [2024-06-04 15:44:58,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803488687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:44:58,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:44:58,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:44:58,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517688883] [2024-06-04 15:44:58,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:44:58,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:44:58,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:44:58,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:44:58,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:44:58,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:44:58,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 403 transitions, 5955 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:44:58,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:44:58,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:44:58,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:00,314 INFO L124 PetriNetUnfolderBase]: 4746/7369 cut-off events. [2024-06-04 15:45:00,314 INFO L125 PetriNetUnfolderBase]: For 595767/595767 co-relation queries the response was YES. [2024-06-04 15:45:00,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57418 conditions, 7369 events. 4746/7369 cut-off events. For 595767/595767 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 44096 event pairs, 1995 based on Foata normal form. 3/7372 useless extension candidates. Maximal degree in co-relation 57257. Up to 7202 conditions per place. [2024-06-04 15:45:00,401 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 393 selfloop transitions, 43 changer transitions 0/439 dead transitions. [2024-06-04 15:45:00,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 439 transitions, 7233 flow [2024-06-04 15:45:00,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:45:00,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:45:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-04 15:45:00,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-04 15:45:00,402 INFO L175 Difference]: Start difference. First operand has 331 places, 403 transitions, 5955 flow. Second operand 9 states and 147 transitions. [2024-06-04 15:45:00,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 439 transitions, 7233 flow [2024-06-04 15:45:02,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 439 transitions, 6922 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-04 15:45:02,310 INFO L231 Difference]: Finished difference. Result has 332 places, 411 transitions, 5884 flow [2024-06-04 15:45:02,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5646, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5884, PETRI_PLACES=332, PETRI_TRANSITIONS=411} [2024-06-04 15:45:02,311 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-04 15:45:02,311 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 411 transitions, 5884 flow [2024-06-04 15:45:02,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:02,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:02,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:02,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 15:45:02,312 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)] === [2024-06-04 15:45:02,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:02,312 INFO L85 PathProgramCache]: Analyzing trace with hash -198465717, now seen corresponding path program 2 times [2024-06-04 15:45:02,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:02,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975514526] [2024-06-04 15:45:02,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:02,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:03,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:03,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975514526] [2024-06-04 15:45:03,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975514526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:03,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:03,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:45:03,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961558793] [2024-06-04 15:45:03,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:03,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:45:03,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:03,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:45:03,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:45:03,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:45:03,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 411 transitions, 5884 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:03,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:03,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:45:03,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:05,221 INFO L124 PetriNetUnfolderBase]: 4806/7444 cut-off events. [2024-06-04 15:45:05,222 INFO L125 PetriNetUnfolderBase]: For 595824/595828 co-relation queries the response was YES. [2024-06-04 15:45:05,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58053 conditions, 7444 events. 4806/7444 cut-off events. For 595824/595828 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 44341 event pairs, 1377 based on Foata normal form. 7/7451 useless extension candidates. Maximal degree in co-relation 57891. Up to 7167 conditions per place. [2024-06-04 15:45:05,329 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 377 selfloop transitions, 70 changer transitions 0/450 dead transitions. [2024-06-04 15:45:05,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 450 transitions, 7306 flow [2024-06-04 15:45:05,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:45:05,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:45:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 15:45:05,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 15:45:05,330 INFO L175 Difference]: Start difference. First operand has 332 places, 411 transitions, 5884 flow. Second operand 8 states and 128 transitions. [2024-06-04 15:45:05,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 450 transitions, 7306 flow [2024-06-04 15:45:07,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 450 transitions, 7197 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-04 15:45:07,570 INFO L231 Difference]: Finished difference. Result has 336 places, 431 transitions, 6261 flow [2024-06-04 15:45:07,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5781, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6261, PETRI_PLACES=336, PETRI_TRANSITIONS=431} [2024-06-04 15:45:07,571 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-04 15:45:07,571 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 431 transitions, 6261 flow [2024-06-04 15:45:07,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:07,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:07,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:07,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 15:45:07,572 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)] === [2024-06-04 15:45:07,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:07,572 INFO L85 PathProgramCache]: Analyzing trace with hash -831082122, now seen corresponding path program 1 times [2024-06-04 15:45:07,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:07,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325692286] [2024-06-04 15:45:07,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:07,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:08,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:08,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325692286] [2024-06-04 15:45:08,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325692286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:08,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:08,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:45:08,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170887128] [2024-06-04 15:45:08,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:08,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:45:08,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:08,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:45:08,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:45:08,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:45:08,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 431 transitions, 6261 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:08,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:08,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:45:08,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:10,413 INFO L124 PetriNetUnfolderBase]: 4800/7445 cut-off events. [2024-06-04 15:45:10,413 INFO L125 PetriNetUnfolderBase]: For 610317/610317 co-relation queries the response was YES. [2024-06-04 15:45:10,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58732 conditions, 7445 events. 4800/7445 cut-off events. For 610317/610317 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 44486 event pairs, 2000 based on Foata normal form. 2/7447 useless extension candidates. Maximal degree in co-relation 58567. Up to 7330 conditions per place. [2024-06-04 15:45:10,534 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 419 selfloop transitions, 30 changer transitions 0/452 dead transitions. [2024-06-04 15:45:10,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 452 transitions, 7327 flow [2024-06-04 15:45:10,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:45:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:45:10,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-04 15:45:10,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 15:45:10,536 INFO L175 Difference]: Start difference. First operand has 336 places, 431 transitions, 6261 flow. Second operand 6 states and 105 transitions. [2024-06-04 15:45:10,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 452 transitions, 7327 flow [2024-06-04 15:45:12,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 452 transitions, 7187 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-04 15:45:12,882 INFO L231 Difference]: Finished difference. Result has 340 places, 434 transitions, 6280 flow [2024-06-04 15:45:12,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6121, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6280, PETRI_PLACES=340, PETRI_TRANSITIONS=434} [2024-06-04 15:45:12,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-04 15:45:12,883 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 434 transitions, 6280 flow [2024-06-04 15:45:12,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:12,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:12,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:12,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 15:45:12,883 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)] === [2024-06-04 15:45:12,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:12,884 INFO L85 PathProgramCache]: Analyzing trace with hash -838439507, now seen corresponding path program 3 times [2024-06-04 15:45:12,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:12,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959820967] [2024-06-04 15:45:12,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:12,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:13,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:13,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959820967] [2024-06-04 15:45:13,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959820967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:13,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:13,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:45:13,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660451692] [2024-06-04 15:45:13,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:13,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:45:13,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:13,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:45:13,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:45:13,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:45:13,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 434 transitions, 6280 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:13,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:13,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:45:13,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:15,570 INFO L124 PetriNetUnfolderBase]: 4807/7455 cut-off events. [2024-06-04 15:45:15,570 INFO L125 PetriNetUnfolderBase]: For 622461/622461 co-relation queries the response was YES. [2024-06-04 15:45:15,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59090 conditions, 7455 events. 4807/7455 cut-off events. For 622461/622461 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 44586 event pairs, 2006 based on Foata normal form. 3/7458 useless extension candidates. Maximal degree in co-relation 58923. Up to 7342 conditions per place. [2024-06-04 15:45:15,680 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 427 selfloop transitions, 29 changer transitions 0/459 dead transitions. [2024-06-04 15:45:15,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 459 transitions, 7343 flow [2024-06-04 15:45:15,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:45:15,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:45:15,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-04 15:45:15,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-04 15:45:15,681 INFO L175 Difference]: Start difference. First operand has 340 places, 434 transitions, 6280 flow. Second operand 7 states and 120 transitions. [2024-06-04 15:45:15,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 459 transitions, 7343 flow [2024-06-04 15:45:17,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 459 transitions, 7227 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-04 15:45:17,744 INFO L231 Difference]: Finished difference. Result has 342 places, 437 transitions, 6284 flow [2024-06-04 15:45:17,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6164, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6284, PETRI_PLACES=342, PETRI_TRANSITIONS=437} [2024-06-04 15:45:17,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-04 15:45:17,744 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 437 transitions, 6284 flow [2024-06-04 15:45:17,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:17,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:17,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:17,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 15:45:17,745 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:45:17,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:17,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1465903481, now seen corresponding path program 1 times [2024-06-04 15:45:17,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:17,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458925192] [2024-06-04 15:45:17,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:17,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:19,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:19,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:19,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458925192] [2024-06-04 15:45:19,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458925192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:19,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:19,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:45:19,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535901276] [2024-06-04 15:45:19,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:19,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:45:19,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:19,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:45:19,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:45:19,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:45:19,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 437 transitions, 6284 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:19,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:19,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:45:19,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:21,278 INFO L124 PetriNetUnfolderBase]: 4875/7560 cut-off events. [2024-06-04 15:45:21,278 INFO L125 PetriNetUnfolderBase]: For 646929/646931 co-relation queries the response was YES. [2024-06-04 15:45:21,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59869 conditions, 7560 events. 4875/7560 cut-off events. For 646929/646931 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 45188 event pairs, 1039 based on Foata normal form. 14/7574 useless extension candidates. Maximal degree in co-relation 59702. Up to 7192 conditions per place. [2024-06-04 15:45:21,390 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 435 selfloop transitions, 47 changer transitions 0/485 dead transitions. [2024-06-04 15:45:21,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 485 transitions, 7504 flow [2024-06-04 15:45:21,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:45:21,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:45:21,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-04 15:45:21,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-04 15:45:21,392 INFO L175 Difference]: Start difference. First operand has 342 places, 437 transitions, 6284 flow. Second operand 11 states and 182 transitions. [2024-06-04 15:45:21,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 485 transitions, 7504 flow [2024-06-04 15:45:23,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 485 transitions, 7411 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-04 15:45:23,431 INFO L231 Difference]: Finished difference. Result has 348 places, 439 transitions, 6383 flow [2024-06-04 15:45:23,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6191, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6383, PETRI_PLACES=348, PETRI_TRANSITIONS=439} [2024-06-04 15:45:23,432 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-04 15:45:23,432 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 439 transitions, 6383 flow [2024-06-04 15:45:23,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:23,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:23,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:23,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 15:45:23,432 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:45:23,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:23,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1201331453, now seen corresponding path program 2 times [2024-06-04 15:45:23,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:23,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959373438] [2024-06-04 15:45:23,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:23,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:24,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:24,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959373438] [2024-06-04 15:45:24,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959373438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:24,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:24,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:45:24,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623866855] [2024-06-04 15:45:24,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:24,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:45:24,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:24,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:45:24,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:45:25,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:45:25,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 439 transitions, 6383 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:25,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:25,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:45:25,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:26,984 INFO L124 PetriNetUnfolderBase]: 4943/7676 cut-off events. [2024-06-04 15:45:26,984 INFO L125 PetriNetUnfolderBase]: For 670171/670173 co-relation queries the response was YES. [2024-06-04 15:45:27,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61012 conditions, 7676 events. 4943/7676 cut-off events. For 670171/670173 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46161 event pairs, 1037 based on Foata normal form. 14/7690 useless extension candidates. Maximal degree in co-relation 60844. Up to 7244 conditions per place. [2024-06-04 15:45:27,105 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 432 selfloop transitions, 52 changer transitions 0/487 dead transitions. [2024-06-04 15:45:27,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 487 transitions, 7599 flow [2024-06-04 15:45:27,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:45:27,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:45:27,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-04 15:45:27,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-04 15:45:27,106 INFO L175 Difference]: Start difference. First operand has 348 places, 439 transitions, 6383 flow. Second operand 11 states and 183 transitions. [2024-06-04 15:45:27,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 487 transitions, 7599 flow [2024-06-04 15:45:29,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 487 transitions, 7446 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-04 15:45:29,257 INFO L231 Difference]: Finished difference. Result has 350 places, 441 transitions, 6424 flow [2024-06-04 15:45:29,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6230, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6424, PETRI_PLACES=350, PETRI_TRANSITIONS=441} [2024-06-04 15:45:29,258 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-04 15:45:29,258 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 441 transitions, 6424 flow [2024-06-04 15:45:29,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:29,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:29,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:29,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 15:45:29,258 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:45:29,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:29,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1143239003, now seen corresponding path program 3 times [2024-06-04 15:45:29,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:29,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384863828] [2024-06-04 15:45:29,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:29,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:30,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:30,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384863828] [2024-06-04 15:45:30,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384863828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:30,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:30,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:45:30,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179606045] [2024-06-04 15:45:30,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:30,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:45:30,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:30,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:45:30,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:45:30,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:45:30,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 441 transitions, 6424 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:30,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:30,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:45:30,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:32,747 INFO L124 PetriNetUnfolderBase]: 5011/7788 cut-off events. [2024-06-04 15:45:32,747 INFO L125 PetriNetUnfolderBase]: For 686729/686731 co-relation queries the response was YES. [2024-06-04 15:45:32,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61771 conditions, 7788 events. 5011/7788 cut-off events. For 686729/686731 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 46993 event pairs, 1071 based on Foata normal form. 14/7802 useless extension candidates. Maximal degree in co-relation 61602. Up to 7381 conditions per place. [2024-06-04 15:45:32,864 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 437 selfloop transitions, 50 changer transitions 0/490 dead transitions. [2024-06-04 15:45:32,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 490 transitions, 7651 flow [2024-06-04 15:45:32,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:45:32,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:45:32,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-04 15:45:32,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917748917748918 [2024-06-04 15:45:32,865 INFO L175 Difference]: Start difference. First operand has 350 places, 441 transitions, 6424 flow. Second operand 11 states and 181 transitions. [2024-06-04 15:45:32,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 490 transitions, 7651 flow [2024-06-04 15:45:34,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 490 transitions, 7504 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-04 15:45:34,683 INFO L231 Difference]: Finished difference. Result has 353 places, 443 transitions, 6472 flow [2024-06-04 15:45:34,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6277, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6472, PETRI_PLACES=353, PETRI_TRANSITIONS=443} [2024-06-04 15:45:34,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-04 15:45:34,684 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 443 transitions, 6472 flow [2024-06-04 15:45:34,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:45:34,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:34,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:34,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 15:45:34,684 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:45:34,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:34,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1419183839, now seen corresponding path program 4 times [2024-06-04 15:45:34,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:34,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279200243] [2024-06-04 15:45:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:34,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:36,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:36,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279200243] [2024-06-04 15:45:36,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279200243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:36,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:36,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-04 15:45:36,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078248407] [2024-06-04 15:45:36,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:36,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 15:45:36,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:36,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 15:45:36,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-04 15:45:36,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:45:36,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 443 transitions, 6472 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 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) [2024-06-04 15:45:36,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:36,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:45:36,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:38,667 INFO L124 PetriNetUnfolderBase]: 5052/7859 cut-off events. [2024-06-04 15:45:38,668 INFO L125 PetriNetUnfolderBase]: For 703611/703611 co-relation queries the response was YES. [2024-06-04 15:45:38,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62300 conditions, 7859 events. 5052/7859 cut-off events. For 703611/703611 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 47540 event pairs, 1046 based on Foata normal form. 12/7871 useless extension candidates. Maximal degree in co-relation 62130. Up to 7370 conditions per place. [2024-06-04 15:45:38,780 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 420 selfloop transitions, 69 changer transitions 0/492 dead transitions. [2024-06-04 15:45:38,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 492 transitions, 7699 flow [2024-06-04 15:45:38,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:45:38,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:45:38,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-04 15:45:38,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-04 15:45:38,781 INFO L175 Difference]: Start difference. First operand has 353 places, 443 transitions, 6472 flow. Second operand 11 states and 185 transitions. [2024-06-04 15:45:38,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 492 transitions, 7699 flow [2024-06-04 15:45:40,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 492 transitions, 7529 flow, removed 31 selfloop flow, removed 10 redundant places. [2024-06-04 15:45:40,744 INFO L231 Difference]: Finished difference. Result has 354 places, 444 transitions, 6516 flow [2024-06-04 15:45:40,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6302, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6516, PETRI_PLACES=354, PETRI_TRANSITIONS=444} [2024-06-04 15:45:40,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-04 15:45:40,744 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 444 transitions, 6516 flow [2024-06-04 15:45:40,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 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) [2024-06-04 15:45:40,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:40,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:40,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 15:45:40,745 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:45:40,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:40,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1248481409, now seen corresponding path program 5 times [2024-06-04 15:45:40,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:40,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867628813] [2024-06-04 15:45:40,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:40,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:42,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:42,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867628813] [2024-06-04 15:45:42,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867628813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:42,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:42,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-04 15:45:42,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409982540] [2024-06-04 15:45:42,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:42,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 15:45:42,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:42,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 15:45:42,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-04 15:45:42,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:45:42,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 444 transitions, 6516 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 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) [2024-06-04 15:45:42,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:42,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:45:42,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:44,675 INFO L124 PetriNetUnfolderBase]: 5093/7930 cut-off events. [2024-06-04 15:45:44,675 INFO L125 PetriNetUnfolderBase]: For 721148/721148 co-relation queries the response was YES. [2024-06-04 15:45:44,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62906 conditions, 7930 events. 5093/7930 cut-off events. For 721148/721148 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 48117 event pairs, 1056 based on Foata normal form. 12/7942 useless extension candidates. Maximal degree in co-relation 62735. Up to 7441 conditions per place. [2024-06-04 15:45:44,789 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 423 selfloop transitions, 66 changer transitions 0/492 dead transitions. [2024-06-04 15:45:44,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 492 transitions, 7741 flow [2024-06-04 15:45:44,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:45:44,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:45:44,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-04 15:45:44,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-04 15:45:44,790 INFO L175 Difference]: Start difference. First operand has 354 places, 444 transitions, 6516 flow. Second operand 11 states and 185 transitions. [2024-06-04 15:45:44,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 492 transitions, 7741 flow [2024-06-04 15:45:46,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 492 transitions, 7545 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-04 15:45:46,511 INFO L231 Difference]: Finished difference. Result has 356 places, 445 transitions, 6530 flow [2024-06-04 15:45:46,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6320, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6530, PETRI_PLACES=356, PETRI_TRANSITIONS=445} [2024-06-04 15:45:46,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-04 15:45:46,512 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 445 transitions, 6530 flow [2024-06-04 15:45:46,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 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) [2024-06-04 15:45:46,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:46,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:46,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 15:45:46,512 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:45:46,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:46,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1248366089, now seen corresponding path program 6 times [2024-06-04 15:45:46,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:46,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235393390] [2024-06-04 15:45:46,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:46,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:48,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:48,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235393390] [2024-06-04 15:45:48,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235393390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:48,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:48,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-04 15:45:48,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766325635] [2024-06-04 15:45:48,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:48,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 15:45:48,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:48,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 15:45:48,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-04 15:45:48,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:45:48,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 445 transitions, 6530 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 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) [2024-06-04 15:45:48,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:48,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:45:48,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:50,671 INFO L124 PetriNetUnfolderBase]: 5134/8001 cut-off events. [2024-06-04 15:45:50,671 INFO L125 PetriNetUnfolderBase]: For 739696/739696 co-relation queries the response was YES. [2024-06-04 15:45:50,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63396 conditions, 8001 events. 5134/8001 cut-off events. For 739696/739696 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 48712 event pairs, 1059 based on Foata normal form. 12/8013 useless extension candidates. Maximal degree in co-relation 63224. Up to 7453 conditions per place. [2024-06-04 15:45:50,780 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 419 selfloop transitions, 71 changer transitions 0/493 dead transitions. [2024-06-04 15:45:50,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 493 transitions, 7759 flow [2024-06-04 15:45:50,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:45:50,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:45:50,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-04 15:45:50,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-04 15:45:50,781 INFO L175 Difference]: Start difference. First operand has 356 places, 445 transitions, 6530 flow. Second operand 11 states and 185 transitions. [2024-06-04 15:45:50,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 493 transitions, 7759 flow [2024-06-04 15:45:53,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 493 transitions, 7567 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-04 15:45:53,080 INFO L231 Difference]: Finished difference. Result has 358 places, 446 transitions, 6560 flow [2024-06-04 15:45:53,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6338, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6560, PETRI_PLACES=358, PETRI_TRANSITIONS=446} [2024-06-04 15:45:53,081 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-04 15:45:53,081 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 446 transitions, 6560 flow [2024-06-04 15:45:53,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 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) [2024-06-04 15:45:53,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:53,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:53,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 15:45:53,082 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)] === [2024-06-04 15:45:53,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:53,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1032375058, now seen corresponding path program 1 times [2024-06-04 15:45:53,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:53,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642081230] [2024-06-04 15:45:53,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:53,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:45:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:45:54,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:45:54,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642081230] [2024-06-04 15:45:54,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642081230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:45:54,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:45:54,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:45:54,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116379095] [2024-06-04 15:45:54,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:45:54,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:45:54,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:45:54,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:45:54,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:45:54,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:45:54,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 446 transitions, 6560 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-04 15:45:54,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:45:54,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:45:54,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:45:56,712 INFO L124 PetriNetUnfolderBase]: 5278/8203 cut-off events. [2024-06-04 15:45:56,713 INFO L125 PetriNetUnfolderBase]: For 756722/756724 co-relation queries the response was YES. [2024-06-04 15:45:56,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64955 conditions, 8203 events. 5278/8203 cut-off events. For 756722/756724 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 49912 event pairs, 1211 based on Foata normal form. 6/8209 useless extension candidates. Maximal degree in co-relation 64782. Up to 7808 conditions per place. [2024-06-04 15:45:56,838 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 445 selfloop transitions, 66 changer transitions 0/514 dead transitions. [2024-06-04 15:45:56,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 514 transitions, 8536 flow [2024-06-04 15:45:56,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:45:56,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:45:56,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 15:45:56,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 15:45:56,839 INFO L175 Difference]: Start difference. First operand has 358 places, 446 transitions, 6560 flow. Second operand 9 states and 162 transitions. [2024-06-04 15:45:56,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 514 transitions, 8536 flow [2024-06-04 15:45:59,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 514 transitions, 8332 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-04 15:45:59,302 INFO L231 Difference]: Finished difference. Result has 360 places, 471 transitions, 6834 flow [2024-06-04 15:45:59,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6356, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6834, PETRI_PLACES=360, PETRI_TRANSITIONS=471} [2024-06-04 15:45:59,303 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-04 15:45:59,303 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 471 transitions, 6834 flow [2024-06-04 15:45:59,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-04 15:45:59,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:45:59,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:45:59,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 15:45:59,303 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)] === [2024-06-04 15:45:59,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:45:59,304 INFO L85 PathProgramCache]: Analyzing trace with hash 486043194, now seen corresponding path program 2 times [2024-06-04 15:45:59,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:45:59,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556452748] [2024-06-04 15:45:59,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:45:59,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:45:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:00,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:00,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556452748] [2024-06-04 15:46:00,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556452748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:00,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:00,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:46:00,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656491289] [2024-06-04 15:46:00,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:00,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:46:00,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:00,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:46:00,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:46:00,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:46:00,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 471 transitions, 6834 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-04 15:46:00,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:00,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:46:00,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:02,825 INFO L124 PetriNetUnfolderBase]: 5298/8229 cut-off events. [2024-06-04 15:46:02,825 INFO L125 PetriNetUnfolderBase]: For 768044/768044 co-relation queries the response was YES. [2024-06-04 15:46:02,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65419 conditions, 8229 events. 5298/8229 cut-off events. For 768044/768044 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 50005 event pairs, 1133 based on Foata normal form. 4/8233 useless extension candidates. Maximal degree in co-relation 65243. Up to 7824 conditions per place. [2024-06-04 15:46:02,953 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 435 selfloop transitions, 73 changer transitions 0/511 dead transitions. [2024-06-04 15:46:02,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 511 transitions, 8377 flow [2024-06-04 15:46:02,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:46:02,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:46:02,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-04 15:46:02,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-04 15:46:02,954 INFO L175 Difference]: Start difference. First operand has 360 places, 471 transitions, 6834 flow. Second operand 9 states and 156 transitions. [2024-06-04 15:46:02,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 511 transitions, 8377 flow [2024-06-04 15:46:05,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 511 transitions, 8298 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-04 15:46:05,606 INFO L231 Difference]: Finished difference. Result has 368 places, 477 transitions, 7017 flow [2024-06-04 15:46:05,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6763, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7017, PETRI_PLACES=368, PETRI_TRANSITIONS=477} [2024-06-04 15:46:05,606 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-04 15:46:05,606 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 477 transitions, 7017 flow [2024-06-04 15:46:05,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-04 15:46:05,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:05,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:05,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 15:46:05,607 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)] === [2024-06-04 15:46:05,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:05,607 INFO L85 PathProgramCache]: Analyzing trace with hash -401441856, now seen corresponding path program 3 times [2024-06-04 15:46:05,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:05,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802558893] [2024-06-04 15:46:05,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:05,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:07,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:07,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:07,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802558893] [2024-06-04 15:46:07,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802558893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:07,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:07,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:46:07,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710810102] [2024-06-04 15:46:07,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:07,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:46:07,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:07,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:46:07,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:46:07,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:46:07,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 477 transitions, 7017 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-04 15:46:07,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:07,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:46:07,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:09,323 INFO L124 PetriNetUnfolderBase]: 5286/8213 cut-off events. [2024-06-04 15:46:09,323 INFO L125 PetriNetUnfolderBase]: For 772044/772044 co-relation queries the response was YES. [2024-06-04 15:46:09,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65412 conditions, 8213 events. 5286/8213 cut-off events. For 772044/772044 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 49974 event pairs, 1131 based on Foata normal form. 4/8217 useless extension candidates. Maximal degree in co-relation 65233. Up to 7816 conditions per place. [2024-06-04 15:46:09,452 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 439 selfloop transitions, 71 changer transitions 0/513 dead transitions. [2024-06-04 15:46:09,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 513 transitions, 8492 flow [2024-06-04 15:46:09,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:46:09,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:46:09,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 15:46:09,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-04 15:46:09,453 INFO L175 Difference]: Start difference. First operand has 368 places, 477 transitions, 7017 flow. Second operand 9 states and 157 transitions. [2024-06-04 15:46:09,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 513 transitions, 8492 flow [2024-06-04 15:46:12,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 513 transitions, 8309 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-04 15:46:12,226 INFO L231 Difference]: Finished difference. Result has 373 places, 478 transitions, 7001 flow [2024-06-04 15:46:12,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6834, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7001, PETRI_PLACES=373, PETRI_TRANSITIONS=478} [2024-06-04 15:46:12,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-04 15:46:12,227 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 478 transitions, 7001 flow [2024-06-04 15:46:12,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-04 15:46:12,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:12,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:12,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 15:46:12,228 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:46:12,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:12,228 INFO L85 PathProgramCache]: Analyzing trace with hash 790581049, now seen corresponding path program 7 times [2024-06-04 15:46:12,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:12,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843542017] [2024-06-04 15:46:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:12,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:13,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:13,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843542017] [2024-06-04 15:46:13,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843542017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:13,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:13,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:46:13,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456803420] [2024-06-04 15:46:13,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:13,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:46:13,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:13,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:46:13,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:46:13,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:46:13,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 478 transitions, 7001 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:13,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:13,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:46:13,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:15,842 INFO L124 PetriNetUnfolderBase]: 5381/8376 cut-off events. [2024-06-04 15:46:15,842 INFO L125 PetriNetUnfolderBase]: For 819742/819744 co-relation queries the response was YES. [2024-06-04 15:46:15,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66586 conditions, 8376 events. 5381/8376 cut-off events. For 819742/819744 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 51392 event pairs, 1305 based on Foata normal form. 14/8390 useless extension candidates. Maximal degree in co-relation 66405. Up to 7934 conditions per place. [2024-06-04 15:46:15,969 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 474 selfloop transitions, 51 changer transitions 0/528 dead transitions. [2024-06-04 15:46:15,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 528 transitions, 8325 flow [2024-06-04 15:46:15,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:46:15,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:46:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-04 15:46:15,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3874458874458874 [2024-06-04 15:46:15,970 INFO L175 Difference]: Start difference. First operand has 373 places, 478 transitions, 7001 flow. Second operand 11 states and 179 transitions. [2024-06-04 15:46:15,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 528 transitions, 8325 flow [2024-06-04 15:46:19,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 528 transitions, 8193 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 15:46:19,099 INFO L231 Difference]: Finished difference. Result has 378 places, 481 transitions, 7091 flow [2024-06-04 15:46:19,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6869, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7091, PETRI_PLACES=378, PETRI_TRANSITIONS=481} [2024-06-04 15:46:19,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-04 15:46:19,100 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 481 transitions, 7091 flow [2024-06-04 15:46:19,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:19,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:19,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:19,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 15:46:19,100 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)] === [2024-06-04 15:46:19,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:19,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1258901060, now seen corresponding path program 4 times [2024-06-04 15:46:19,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:19,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568932720] [2024-06-04 15:46:19,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:19,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:20,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:20,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:20,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568932720] [2024-06-04 15:46:20,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568932720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:20,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:20,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:46:20,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652530033] [2024-06-04 15:46:20,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:20,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:46:20,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:20,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:46:20,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:46:20,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:46:20,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 481 transitions, 7091 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-04 15:46:20,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:20,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:46:20,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:22,438 INFO L124 PetriNetUnfolderBase]: 5399/8408 cut-off events. [2024-06-04 15:46:22,438 INFO L125 PetriNetUnfolderBase]: For 800460/800462 co-relation queries the response was YES. [2024-06-04 15:46:22,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66557 conditions, 8408 events. 5399/8408 cut-off events. For 800460/800462 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 51611 event pairs, 1442 based on Foata normal form. 6/8414 useless extension candidates. Maximal degree in co-relation 66375. Up to 7991 conditions per place. [2024-06-04 15:46:22,561 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 438 selfloop transitions, 80 changer transitions 0/521 dead transitions. [2024-06-04 15:46:22,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 521 transitions, 8459 flow [2024-06-04 15:46:22,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:46:22,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:46:22,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-04 15:46:22,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-04 15:46:22,562 INFO L175 Difference]: Start difference. First operand has 378 places, 481 transitions, 7091 flow. Second operand 9 states and 155 transitions. [2024-06-04 15:46:22,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 521 transitions, 8459 flow [2024-06-04 15:46:25,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 521 transitions, 8266 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-06-04 15:46:25,130 INFO L231 Difference]: Finished difference. Result has 379 places, 487 transitions, 7134 flow [2024-06-04 15:46:25,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6898, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7134, PETRI_PLACES=379, PETRI_TRANSITIONS=487} [2024-06-04 15:46:25,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-04 15:46:25,130 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 487 transitions, 7134 flow [2024-06-04 15:46:25,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-04 15:46:25,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:25,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:25,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 15:46:25,131 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)] === [2024-06-04 15:46:25,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:25,131 INFO L85 PathProgramCache]: Analyzing trace with hash -467064222, now seen corresponding path program 1 times [2024-06-04 15:46:25,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:25,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952264558] [2024-06-04 15:46:25,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:25,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:25,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:25,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952264558] [2024-06-04 15:46:25,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952264558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:25,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:25,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:46:25,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701961640] [2024-06-04 15:46:25,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:25,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:46:25,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:25,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:46:25,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:46:25,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:46:25,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 487 transitions, 7134 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:25,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:25,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:46:25,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:28,040 INFO L124 PetriNetUnfolderBase]: 5461/8490 cut-off events. [2024-06-04 15:46:28,041 INFO L125 PetriNetUnfolderBase]: For 819391/819403 co-relation queries the response was YES. [2024-06-04 15:46:28,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67685 conditions, 8490 events. 5461/8490 cut-off events. For 819391/819403 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 52097 event pairs, 1670 based on Foata normal form. 14/8504 useless extension candidates. Maximal degree in co-relation 67501. Up to 8295 conditions per place. [2024-06-04 15:46:28,159 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 477 selfloop transitions, 55 changer transitions 0/535 dead transitions. [2024-06-04 15:46:28,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 535 transitions, 8867 flow [2024-06-04 15:46:28,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:46:28,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:46:28,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-04 15:46:28,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-04 15:46:28,161 INFO L175 Difference]: Start difference. First operand has 379 places, 487 transitions, 7134 flow. Second operand 9 states and 149 transitions. [2024-06-04 15:46:28,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 535 transitions, 8867 flow [2024-06-04 15:46:31,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 535 transitions, 8739 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-04 15:46:31,138 INFO L231 Difference]: Finished difference. Result has 385 places, 506 transitions, 7575 flow [2024-06-04 15:46:31,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7006, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7575, PETRI_PLACES=385, PETRI_TRANSITIONS=506} [2024-06-04 15:46:31,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-04 15:46:31,139 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 506 transitions, 7575 flow [2024-06-04 15:46:31,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:31,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:31,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:31,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 15:46:31,139 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)] === [2024-06-04 15:46:31,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:31,140 INFO L85 PathProgramCache]: Analyzing trace with hash 507084172, now seen corresponding path program 2 times [2024-06-04 15:46:31,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:31,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216412142] [2024-06-04 15:46:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:31,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:31,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:31,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216412142] [2024-06-04 15:46:31,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216412142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:31,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:31,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:46:31,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733032486] [2024-06-04 15:46:31,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:31,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:46:31,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:31,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:46:31,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:46:31,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:46:31,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 506 transitions, 7575 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:31,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:31,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:46:31,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:34,091 INFO L124 PetriNetUnfolderBase]: 5455/8481 cut-off events. [2024-06-04 15:46:34,091 INFO L125 PetriNetUnfolderBase]: For 831722/831726 co-relation queries the response was YES. [2024-06-04 15:46:34,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67859 conditions, 8481 events. 5455/8481 cut-off events. For 831722/831726 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 52029 event pairs, 1668 based on Foata normal form. 6/8487 useless extension candidates. Maximal degree in co-relation 67672. Up to 8332 conditions per place. [2024-06-04 15:46:34,217 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 481 selfloop transitions, 47 changer transitions 0/531 dead transitions. [2024-06-04 15:46:34,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 531 transitions, 8719 flow [2024-06-04 15:46:34,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:46:34,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:46:34,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-04 15:46:34,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 15:46:34,218 INFO L175 Difference]: Start difference. First operand has 385 places, 506 transitions, 7575 flow. Second operand 9 states and 144 transitions. [2024-06-04 15:46:34,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 531 transitions, 8719 flow [2024-06-04 15:46:38,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 531 transitions, 8568 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-04 15:46:38,370 INFO L231 Difference]: Finished difference. Result has 391 places, 506 transitions, 7524 flow [2024-06-04 15:46:38,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7424, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7524, PETRI_PLACES=391, PETRI_TRANSITIONS=506} [2024-06-04 15:46:38,371 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-04 15:46:38,371 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 506 transitions, 7524 flow [2024-06-04 15:46:38,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:38,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:38,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:38,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 15:46:38,371 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)] === [2024-06-04 15:46:38,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:38,372 INFO L85 PathProgramCache]: Analyzing trace with hash 507084358, now seen corresponding path program 1 times [2024-06-04 15:46:38,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:38,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451204312] [2024-06-04 15:46:38,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:38,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:39,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:39,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451204312] [2024-06-04 15:46:39,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451204312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:39,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:39,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:46:39,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509517685] [2024-06-04 15:46:39,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:39,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:46:39,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:39,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:46:39,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:46:39,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:46:39,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 506 transitions, 7524 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:39,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:39,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:46:39,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:41,560 INFO L124 PetriNetUnfolderBase]: 5512/8560 cut-off events. [2024-06-04 15:46:41,560 INFO L125 PetriNetUnfolderBase]: For 873672/873676 co-relation queries the response was YES. [2024-06-04 15:46:41,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68943 conditions, 8560 events. 5512/8560 cut-off events. For 873672/873676 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 52397 event pairs, 1678 based on Foata normal form. 8/8568 useless extension candidates. Maximal degree in co-relation 68754. Up to 8306 conditions per place. [2024-06-04 15:46:41,701 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 479 selfloop transitions, 64 changer transitions 0/546 dead transitions. [2024-06-04 15:46:41,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 546 transitions, 9044 flow [2024-06-04 15:46:41,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:46:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:46:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-04 15:46:41,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 15:46:41,704 INFO L175 Difference]: Start difference. First operand has 391 places, 506 transitions, 7524 flow. Second operand 9 states and 153 transitions. [2024-06-04 15:46:41,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 546 transitions, 9044 flow [2024-06-04 15:46:44,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 546 transitions, 8899 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-04 15:46:44,954 INFO L231 Difference]: Finished difference. Result has 396 places, 516 transitions, 7696 flow [2024-06-04 15:46:44,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7379, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7696, PETRI_PLACES=396, PETRI_TRANSITIONS=516} [2024-06-04 15:46:44,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-04 15:46:44,955 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 516 transitions, 7696 flow [2024-06-04 15:46:44,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:44,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:44,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:44,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 15:46:44,955 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)] === [2024-06-04 15:46:44,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:44,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1839134364, now seen corresponding path program 2 times [2024-06-04 15:46:44,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:44,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866928613] [2024-06-04 15:46:44,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:44,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:45,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:45,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:45,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866928613] [2024-06-04 15:46:45,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866928613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:45,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:45,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:46:45,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111983105] [2024-06-04 15:46:45,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:45,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:46:45,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:45,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:46:45,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:46:45,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:46:45,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 516 transitions, 7696 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:45,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:45,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:46:45,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:47,956 INFO L124 PetriNetUnfolderBase]: 5532/8588 cut-off events. [2024-06-04 15:46:47,956 INFO L125 PetriNetUnfolderBase]: For 894535/894539 co-relation queries the response was YES. [2024-06-04 15:46:48,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70088 conditions, 8588 events. 5532/8588 cut-off events. For 894535/894539 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 52607 event pairs, 1700 based on Foata normal form. 8/8596 useless extension candidates. Maximal degree in co-relation 69897. Up to 8390 conditions per place. [2024-06-04 15:46:48,096 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 486 selfloop transitions, 57 changer transitions 0/546 dead transitions. [2024-06-04 15:46:48,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 546 transitions, 8972 flow [2024-06-04 15:46:48,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:46:48,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:46:48,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-04 15:46:48,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 15:46:48,097 INFO L175 Difference]: Start difference. First operand has 396 places, 516 transitions, 7696 flow. Second operand 9 states and 144 transitions. [2024-06-04 15:46:48,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 546 transitions, 8972 flow [2024-06-04 15:46:51,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 546 transitions, 8889 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-04 15:46:51,646 INFO L231 Difference]: Finished difference. Result has 403 places, 522 transitions, 7849 flow [2024-06-04 15:46:51,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7613, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7849, PETRI_PLACES=403, PETRI_TRANSITIONS=522} [2024-06-04 15:46:51,646 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-04 15:46:51,647 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 522 transitions, 7849 flow [2024-06-04 15:46:51,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:51,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:51,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:51,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 15:46:51,647 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)] === [2024-06-04 15:46:51,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:51,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1060148128, now seen corresponding path program 3 times [2024-06-04 15:46:51,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:51,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012284680] [2024-06-04 15:46:51,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:51,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:46:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:46:52,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:46:52,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012284680] [2024-06-04 15:46:52,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012284680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:46:52,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:46:52,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:46:52,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139646284] [2024-06-04 15:46:52,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:46:52,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:46:52,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:46:52,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:46:52,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:46:52,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:46:52,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 522 transitions, 7849 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:52,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:46:52,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:46:52,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:46:54,793 INFO L124 PetriNetUnfolderBase]: 5520/8572 cut-off events. [2024-06-04 15:46:54,794 INFO L125 PetriNetUnfolderBase]: For 895834/895838 co-relation queries the response was YES. [2024-06-04 15:46:54,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70303 conditions, 8572 events. 5520/8572 cut-off events. For 895834/895838 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 52506 event pairs, 1691 based on Foata normal form. 8/8580 useless extension candidates. Maximal degree in co-relation 70108. Up to 8368 conditions per place. [2024-06-04 15:46:55,172 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 484 selfloop transitions, 59 changer transitions 0/546 dead transitions. [2024-06-04 15:46:55,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 546 transitions, 9029 flow [2024-06-04 15:46:55,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:46:55,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:46:55,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-04 15:46:55,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 15:46:55,173 INFO L175 Difference]: Start difference. First operand has 403 places, 522 transitions, 7849 flow. Second operand 9 states and 144 transitions. [2024-06-04 15:46:55,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 546 transitions, 9029 flow [2024-06-04 15:46:59,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 546 transitions, 8808 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-04 15:46:59,335 INFO L231 Difference]: Finished difference. Result has 406 places, 522 transitions, 7752 flow [2024-06-04 15:46:59,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7628, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7752, PETRI_PLACES=406, PETRI_TRANSITIONS=522} [2024-06-04 15:46:59,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-04 15:46:59,335 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 522 transitions, 7752 flow [2024-06-04 15:46:59,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:46:59,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:46:59,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:46:59,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 15:46:59,336 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)] === [2024-06-04 15:46:59,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:46:59,336 INFO L85 PathProgramCache]: Analyzing trace with hash 684215692, now seen corresponding path program 3 times [2024-06-04 15:46:59,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:46:59,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020090467] [2024-06-04 15:46:59,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:46:59,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:46:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:00,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:00,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:00,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020090467] [2024-06-04 15:47:00,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020090467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:00,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:00,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:47:00,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747505708] [2024-06-04 15:47:00,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:00,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:47:00,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:00,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:47:00,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:47:00,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:47:00,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 522 transitions, 7752 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:00,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:00,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:47:00,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:02,369 INFO L124 PetriNetUnfolderBase]: 5514/8564 cut-off events. [2024-06-04 15:47:02,369 INFO L125 PetriNetUnfolderBase]: For 894590/894594 co-relation queries the response was YES. [2024-06-04 15:47:02,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69945 conditions, 8564 events. 5514/8564 cut-off events. For 894590/894594 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 52498 event pairs, 1688 based on Foata normal form. 6/8570 useless extension candidates. Maximal degree in co-relation 69749. Up to 8441 conditions per place. [2024-06-04 15:47:02,496 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 498 selfloop transitions, 42 changer transitions 0/543 dead transitions. [2024-06-04 15:47:02,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 543 transitions, 8910 flow [2024-06-04 15:47:02,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:47:02,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:47:02,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-04 15:47:02,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-04 15:47:02,497 INFO L175 Difference]: Start difference. First operand has 406 places, 522 transitions, 7752 flow. Second operand 9 states and 138 transitions. [2024-06-04 15:47:02,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 543 transitions, 8910 flow [2024-06-04 15:47:06,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 543 transitions, 8721 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-04 15:47:06,204 INFO L231 Difference]: Finished difference. Result has 410 places, 522 transitions, 7653 flow [2024-06-04 15:47:06,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7563, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7653, PETRI_PLACES=410, PETRI_TRANSITIONS=522} [2024-06-04 15:47:06,204 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-04 15:47:06,204 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 522 transitions, 7653 flow [2024-06-04 15:47:06,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:06,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:06,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:06,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 15:47:06,204 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)] === [2024-06-04 15:47:06,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:06,205 INFO L85 PathProgramCache]: Analyzing trace with hash 684461956, now seen corresponding path program 1 times [2024-06-04 15:47:06,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:06,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025160271] [2024-06-04 15:47:06,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:06,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:07,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:07,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025160271] [2024-06-04 15:47:07,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025160271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:07,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:07,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:47:07,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782167863] [2024-06-04 15:47:07,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:07,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:47:07,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:07,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:47:07,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:47:07,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:47:07,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 522 transitions, 7653 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-04 15:47:07,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:07,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:47:07,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:09,734 INFO L124 PetriNetUnfolderBase]: 5557/8629 cut-off events. [2024-06-04 15:47:09,735 INFO L125 PetriNetUnfolderBase]: For 921513/921517 co-relation queries the response was YES. [2024-06-04 15:47:09,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70592 conditions, 8629 events. 5557/8629 cut-off events. For 921513/921517 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 52921 event pairs, 1695 based on Foata normal form. 8/8637 useless extension candidates. Maximal degree in co-relation 70395. Up to 8415 conditions per place. [2024-06-04 15:47:09,879 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 495 selfloop transitions, 66 changer transitions 0/564 dead transitions. [2024-06-04 15:47:09,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 564 transitions, 9192 flow [2024-06-04 15:47:09,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:47:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:47:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-04 15:47:09,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-04 15:47:09,880 INFO L175 Difference]: Start difference. First operand has 410 places, 522 transitions, 7653 flow. Second operand 9 states and 145 transitions. [2024-06-04 15:47:09,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 564 transitions, 9192 flow [2024-06-04 15:47:13,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 564 transitions, 9080 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-04 15:47:13,568 INFO L231 Difference]: Finished difference. Result has 415 places, 540 transitions, 8057 flow [2024-06-04 15:47:13,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7551, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8057, PETRI_PLACES=415, PETRI_TRANSITIONS=540} [2024-06-04 15:47:13,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-04 15:47:13,569 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 540 transitions, 8057 flow [2024-06-04 15:47:13,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-04 15:47:13,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:13,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:13,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 15:47:13,569 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:47:13,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:13,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2076484763, now seen corresponding path program 8 times [2024-06-04 15:47:13,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:13,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748732855] [2024-06-04 15:47:13,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:13,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:15,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:15,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748732855] [2024-06-04 15:47:15,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748732855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:15,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:15,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:47:15,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744240540] [2024-06-04 15:47:15,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:15,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:47:15,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:15,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:47:15,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:47:15,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:47:15,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 540 transitions, 8057 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:15,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:15,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:47:15,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:17,672 INFO L124 PetriNetUnfolderBase]: 5598/8696 cut-off events. [2024-06-04 15:47:17,672 INFO L125 PetriNetUnfolderBase]: For 973158/973160 co-relation queries the response was YES. [2024-06-04 15:47:17,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71921 conditions, 8696 events. 5598/8696 cut-off events. For 973158/973160 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 53347 event pairs, 1290 based on Foata normal form. 14/8710 useless extension candidates. Maximal degree in co-relation 71720. Up to 7759 conditions per place. [2024-06-04 15:47:17,795 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 502 selfloop transitions, 77 changer transitions 0/582 dead transitions. [2024-06-04 15:47:17,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 582 transitions, 9445 flow [2024-06-04 15:47:17,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:47:17,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:47:17,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-04 15:47:17,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-04 15:47:17,797 INFO L175 Difference]: Start difference. First operand has 415 places, 540 transitions, 8057 flow. Second operand 10 states and 162 transitions. [2024-06-04 15:47:17,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 582 transitions, 9445 flow [2024-06-04 15:47:21,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 582 transitions, 9352 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-04 15:47:21,957 INFO L231 Difference]: Finished difference. Result has 423 places, 541 transitions, 8211 flow [2024-06-04 15:47:21,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7964, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8211, PETRI_PLACES=423, PETRI_TRANSITIONS=541} [2024-06-04 15:47:21,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-04 15:47:21,957 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 541 transitions, 8211 flow [2024-06-04 15:47:21,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:21,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:21,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:21,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 15:47:21,958 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:47:21,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:21,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1411015157, now seen corresponding path program 9 times [2024-06-04 15:47:21,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:21,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859124793] [2024-06-04 15:47:21,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:21,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:23,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:23,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859124793] [2024-06-04 15:47:23,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859124793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:23,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:23,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:47:23,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363877741] [2024-06-04 15:47:23,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:23,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:47:23,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:23,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:47:23,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:47:23,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:47:23,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 541 transitions, 8211 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:23,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:23,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:47:23,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:26,116 INFO L124 PetriNetUnfolderBase]: 5639/8779 cut-off events. [2024-06-04 15:47:26,116 INFO L125 PetriNetUnfolderBase]: For 1003700/1003702 co-relation queries the response was YES. [2024-06-04 15:47:26,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73116 conditions, 8779 events. 5639/8779 cut-off events. For 1003700/1003702 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 54304 event pairs, 1473 based on Foata normal form. 14/8793 useless extension candidates. Maximal degree in co-relation 72913. Up to 8125 conditions per place. [2024-06-04 15:47:26,268 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 516 selfloop transitions, 64 changer transitions 0/583 dead transitions. [2024-06-04 15:47:26,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 583 transitions, 9603 flow [2024-06-04 15:47:26,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:47:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:47:26,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-04 15:47:26,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-04 15:47:26,269 INFO L175 Difference]: Start difference. First operand has 423 places, 541 transitions, 8211 flow. Second operand 10 states and 164 transitions. [2024-06-04 15:47:26,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 583 transitions, 9603 flow [2024-06-04 15:47:30,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 583 transitions, 9376 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-04 15:47:30,458 INFO L231 Difference]: Finished difference. Result has 425 places, 542 transitions, 8202 flow [2024-06-04 15:47:30,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7988, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8202, PETRI_PLACES=425, PETRI_TRANSITIONS=542} [2024-06-04 15:47:30,458 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-04 15:47:30,458 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 542 transitions, 8202 flow [2024-06-04 15:47:30,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:30,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:30,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:30,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 15:47:30,458 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:47:30,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:30,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1165493113, now seen corresponding path program 10 times [2024-06-04 15:47:30,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:30,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406964990] [2024-06-04 15:47:30,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:30,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:31,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:31,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:31,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406964990] [2024-06-04 15:47:31,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406964990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:31,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:31,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:47:31,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091273475] [2024-06-04 15:47:31,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:31,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:47:31,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:31,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:47:31,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:47:32,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:47:32,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 542 transitions, 8202 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:32,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:32,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:47:32,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:34,476 INFO L124 PetriNetUnfolderBase]: 5680/8850 cut-off events. [2024-06-04 15:47:34,476 INFO L125 PetriNetUnfolderBase]: For 985165/985167 co-relation queries the response was YES. [2024-06-04 15:47:34,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73139 conditions, 8850 events. 5680/8850 cut-off events. For 985165/985167 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 54882 event pairs, 1425 based on Foata normal form. 14/8864 useless extension candidates. Maximal degree in co-relation 72935. Up to 8050 conditions per place. [2024-06-04 15:47:34,648 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 507 selfloop transitions, 74 changer transitions 0/584 dead transitions. [2024-06-04 15:47:34,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 584 transitions, 9594 flow [2024-06-04 15:47:34,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:47:34,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:47:34,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-04 15:47:34,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-04 15:47:34,649 INFO L175 Difference]: Start difference. First operand has 425 places, 542 transitions, 8202 flow. Second operand 10 states and 165 transitions. [2024-06-04 15:47:34,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 584 transitions, 9594 flow [2024-06-04 15:47:39,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 584 transitions, 9384 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-04 15:47:39,018 INFO L231 Difference]: Finished difference. Result has 427 places, 543 transitions, 8228 flow [2024-06-04 15:47:39,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7998, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8228, PETRI_PLACES=427, PETRI_TRANSITIONS=543} [2024-06-04 15:47:39,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-04 15:47:39,018 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 543 transitions, 8228 flow [2024-06-04 15:47:39,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:39,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:39,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:39,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 15:47:39,019 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)] === [2024-06-04 15:47:39,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:39,019 INFO L85 PathProgramCache]: Analyzing trace with hash 318994384, now seen corresponding path program 5 times [2024-06-04 15:47:39,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:39,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841465456] [2024-06-04 15:47:39,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:39,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:40,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:40,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841465456] [2024-06-04 15:47:40,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841465456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:40,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:40,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:47:40,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997488958] [2024-06-04 15:47:40,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:40,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:47:40,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:40,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:47:40,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:47:40,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:47:40,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 543 transitions, 8228 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:40,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:40,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:47:40,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:43,146 INFO L124 PetriNetUnfolderBase]: 5710/8888 cut-off events. [2024-06-04 15:47:43,147 INFO L125 PetriNetUnfolderBase]: For 951933/951935 co-relation queries the response was YES. [2024-06-04 15:47:43,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73004 conditions, 8888 events. 5710/8888 cut-off events. For 951933/951935 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 55053 event pairs, 1612 based on Foata normal form. 6/8894 useless extension candidates. Maximal degree in co-relation 72799. Up to 8421 conditions per place. [2024-06-04 15:47:43,281 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 471 selfloop transitions, 103 changer transitions 0/577 dead transitions. [2024-06-04 15:47:43,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 577 transitions, 9733 flow [2024-06-04 15:47:43,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:47:43,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:47:43,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 15:47:43,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-04 15:47:43,282 INFO L175 Difference]: Start difference. First operand has 427 places, 543 transitions, 8228 flow. Second operand 8 states and 139 transitions. [2024-06-04 15:47:43,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 577 transitions, 9733 flow [2024-06-04 15:47:47,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 577 transitions, 9521 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-04 15:47:47,580 INFO L231 Difference]: Finished difference. Result has 428 places, 549 transitions, 8335 flow [2024-06-04 15:47:47,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8018, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8335, PETRI_PLACES=428, PETRI_TRANSITIONS=549} [2024-06-04 15:47:47,580 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-04 15:47:47,580 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 549 transitions, 8335 flow [2024-06-04 15:47:47,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:47:47,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:47,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:47,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 15:47:47,580 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:47:47,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:47,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1343251, now seen corresponding path program 11 times [2024-06-04 15:47:47,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:47,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663888531] [2024-06-04 15:47:47,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:47,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:49,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:49,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663888531] [2024-06-04 15:47:49,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663888531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:49,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:49,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-04 15:47:49,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613343269] [2024-06-04 15:47:49,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:49,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 15:47:49,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:49,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 15:47:49,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-04 15:47:49,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:47:49,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 549 transitions, 8335 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 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) [2024-06-04 15:47:49,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:49,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:47:49,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:47:52,340 INFO L124 PetriNetUnfolderBase]: 5751/8951 cut-off events. [2024-06-04 15:47:52,340 INFO L125 PetriNetUnfolderBase]: For 973425/973425 co-relation queries the response was YES. [2024-06-04 15:47:52,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73342 conditions, 8951 events. 5751/8951 cut-off events. For 973425/973425 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 55386 event pairs, 1149 based on Foata normal form. 12/8963 useless extension candidates. Maximal degree in co-relation 73135. Up to 7898 conditions per place. [2024-06-04 15:47:52,500 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 495 selfloop transitions, 103 changer transitions 0/601 dead transitions. [2024-06-04 15:47:52,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 601 transitions, 9823 flow [2024-06-04 15:47:52,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:47:52,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:47:52,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-04 15:47:52,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-04 15:47:52,501 INFO L175 Difference]: Start difference. First operand has 428 places, 549 transitions, 8335 flow. Second operand 11 states and 186 transitions. [2024-06-04 15:47:52,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 601 transitions, 9823 flow [2024-06-04 15:47:56,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 601 transitions, 9630 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 15:47:56,247 INFO L231 Difference]: Finished difference. Result has 433 places, 550 transitions, 8428 flow [2024-06-04 15:47:56,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8142, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8428, PETRI_PLACES=433, PETRI_TRANSITIONS=550} [2024-06-04 15:47:56,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-04 15:47:56,247 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 550 transitions, 8428 flow [2024-06-04 15:47:56,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 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) [2024-06-04 15:47:56,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:47:56,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:47:56,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 15:47:56,247 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:47:56,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:47:56,248 INFO L85 PathProgramCache]: Analyzing trace with hash -169359179, now seen corresponding path program 12 times [2024-06-04 15:47:56,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:47:56,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268204044] [2024-06-04 15:47:56,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:47:56,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:47:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:47:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:47:57,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:47:57,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268204044] [2024-06-04 15:47:57,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268204044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:47:57,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:47:57,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-04 15:47:57,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346134012] [2024-06-04 15:47:57,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:47:57,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 15:47:57,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:47:57,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 15:47:57,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-04 15:47:57,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:47:57,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 550 transitions, 8428 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 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) [2024-06-04 15:47:57,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:47:57,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:47:57,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:48:00,489 INFO L124 PetriNetUnfolderBase]: 5792/9022 cut-off events. [2024-06-04 15:48:00,490 INFO L125 PetriNetUnfolderBase]: For 965115/965115 co-relation queries the response was YES. [2024-06-04 15:48:00,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73959 conditions, 9022 events. 5792/9022 cut-off events. For 965115/965115 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 56018 event pairs, 1174 based on Foata normal form. 12/9034 useless extension candidates. Maximal degree in co-relation 73753. Up to 8255 conditions per place. [2024-06-04 15:48:00,650 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 498 selfloop transitions, 91 changer transitions 0/592 dead transitions. [2024-06-04 15:48:00,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 592 transitions, 9838 flow [2024-06-04 15:48:00,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:48:00,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:48:00,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-04 15:48:00,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-04 15:48:00,651 INFO L175 Difference]: Start difference. First operand has 433 places, 550 transitions, 8428 flow. Second operand 10 states and 167 transitions. [2024-06-04 15:48:00,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 592 transitions, 9838 flow [2024-06-04 15:48:05,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 592 transitions, 9568 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-04 15:48:05,416 INFO L231 Difference]: Finished difference. Result has 434 places, 551 transitions, 8422 flow [2024-06-04 15:48:05,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8160, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8422, PETRI_PLACES=434, PETRI_TRANSITIONS=551} [2024-06-04 15:48:05,417 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-04 15:48:05,417 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 551 transitions, 8422 flow [2024-06-04 15:48:05,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 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) [2024-06-04 15:48:05,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:48:05,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:48:05,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 15:48:05,417 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:48:05,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:48:05,418 INFO L85 PathProgramCache]: Analyzing trace with hash -169474499, now seen corresponding path program 13 times [2024-06-04 15:48:05,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:48:05,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209496579] [2024-06-04 15:48:05,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:48:05,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:48:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:48:07,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:48:07,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:48:07,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209496579] [2024-06-04 15:48:07,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209496579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:48:07,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:48:07,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-04 15:48:07,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891884453] [2024-06-04 15:48:07,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:48:07,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 15:48:07,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:48:07,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 15:48:07,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-04 15:48:07,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:48:07,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 551 transitions, 8422 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 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) [2024-06-04 15:48:07,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:48:07,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:48:07,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:48:09,726 INFO L124 PetriNetUnfolderBase]: 5833/9093 cut-off events. [2024-06-04 15:48:09,727 INFO L125 PetriNetUnfolderBase]: For 965420/965420 co-relation queries the response was YES. [2024-06-04 15:48:09,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74150 conditions, 9093 events. 5833/9093 cut-off events. For 965420/965420 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 56633 event pairs, 1167 based on Foata normal form. 12/9105 useless extension candidates. Maximal degree in co-relation 73943. Up to 8208 conditions per place. [2024-06-04 15:48:09,879 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 489 selfloop transitions, 101 changer transitions 0/593 dead transitions. [2024-06-04 15:48:09,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 593 transitions, 9834 flow [2024-06-04 15:48:09,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:48:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:48:09,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-04 15:48:09,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-04 15:48:09,881 INFO L175 Difference]: Start difference. First operand has 434 places, 551 transitions, 8422 flow. Second operand 10 states and 167 transitions. [2024-06-04 15:48:09,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 593 transitions, 9834 flow [2024-06-04 15:48:12,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 593 transitions, 9588 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-04 15:48:12,915 INFO L231 Difference]: Finished difference. Result has 436 places, 552 transitions, 8460 flow [2024-06-04 15:48:12,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8178, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8460, PETRI_PLACES=436, PETRI_TRANSITIONS=552} [2024-06-04 15:48:12,916 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-04 15:48:12,916 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 552 transitions, 8460 flow [2024-06-04 15:48:12,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 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) [2024-06-04 15:48:12,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:48:12,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:48:12,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 15:48:12,916 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)] === [2024-06-04 15:48:12,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:48:12,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1111948926, now seen corresponding path program 6 times [2024-06-04 15:48:12,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:48:12,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721945231] [2024-06-04 15:48:12,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:48:12,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:48:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:48:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:48:14,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:48:14,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721945231] [2024-06-04 15:48:14,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721945231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:48:14,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:48:14,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:48:14,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126564629] [2024-06-04 15:48:14,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:48:14,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:48:14,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:48:14,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:48:14,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:48:14,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:48:14,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 552 transitions, 8460 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-04 15:48:14,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:48:14,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:48:14,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:48:17,007 INFO L124 PetriNetUnfolderBase]: 5895/9179 cut-off events. [2024-06-04 15:48:17,008 INFO L125 PetriNetUnfolderBase]: For 952370/952370 co-relation queries the response was YES. [2024-06-04 15:48:17,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74727 conditions, 9179 events. 5895/9179 cut-off events. For 952370/952370 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 57082 event pairs, 1289 based on Foata normal form. 4/9183 useless extension candidates. Maximal degree in co-relation 74519. Up to 8680 conditions per place. [2024-06-04 15:48:17,166 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 471 selfloop transitions, 114 changer transitions 0/588 dead transitions. [2024-06-04 15:48:17,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 588 transitions, 10235 flow [2024-06-04 15:48:17,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:48:17,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:48:17,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 15:48:17,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-04 15:48:17,168 INFO L175 Difference]: Start difference. First operand has 436 places, 552 transitions, 8460 flow. Second operand 8 states and 138 transitions. [2024-06-04 15:48:17,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 588 transitions, 10235 flow [2024-06-04 15:48:21,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 588 transitions, 9967 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-04 15:48:21,237 INFO L231 Difference]: Finished difference. Result has 437 places, 561 transitions, 8606 flow [2024-06-04 15:48:21,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8196, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8606, PETRI_PLACES=437, PETRI_TRANSITIONS=561} [2024-06-04 15:48:21,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-04 15:48:21,237 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 561 transitions, 8606 flow [2024-06-04 15:48:21,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-04 15:48:21,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:48:21,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:48:21,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 15:48:21,238 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)] === [2024-06-04 15:48:21,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:48:21,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1111937766, now seen corresponding path program 7 times [2024-06-04 15:48:21,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:48:21,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799999718] [2024-06-04 15:48:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:48:21,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:48:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:48:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:48:22,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:48:22,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799999718] [2024-06-04 15:48:22,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799999718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:48:22,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:48:22,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:48:22,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168763612] [2024-06-04 15:48:22,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:48:22,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:48:22,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:48:22,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:48:22,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:48:22,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:48:22,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 561 transitions, 8606 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-04 15:48:22,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:48:22,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:48:22,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:48:25,563 INFO L124 PetriNetUnfolderBase]: 5883/9163 cut-off events. [2024-06-04 15:48:25,564 INFO L125 PetriNetUnfolderBase]: For 927657/927657 co-relation queries the response was YES. [2024-06-04 15:48:25,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73921 conditions, 9163 events. 5883/9163 cut-off events. For 927657/927657 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 57022 event pairs, 1287 based on Foata normal form. 4/9167 useless extension candidates. Maximal degree in co-relation 73711. Up to 8672 conditions per place. [2024-06-04 15:48:25,702 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 477 selfloop transitions, 108 changer transitions 0/588 dead transitions. [2024-06-04 15:48:25,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 588 transitions, 10065 flow [2024-06-04 15:48:25,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:48:25,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:48:25,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 15:48:25,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-04 15:48:25,704 INFO L175 Difference]: Start difference. First operand has 437 places, 561 transitions, 8606 flow. Second operand 8 states and 138 transitions. [2024-06-04 15:48:25,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 588 transitions, 10065 flow [2024-06-04 15:48:30,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 588 transitions, 9887 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-04 15:48:30,847 INFO L231 Difference]: Finished difference. Result has 441 places, 561 transitions, 8656 flow [2024-06-04 15:48:30,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8430, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8656, PETRI_PLACES=441, PETRI_TRANSITIONS=561} [2024-06-04 15:48:30,848 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-04 15:48:30,848 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 561 transitions, 8656 flow [2024-06-04 15:48:30,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-04 15:48:30,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:48:30,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:48:30,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 15:48:30,848 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)] === [2024-06-04 15:48:30,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:48:30,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1198674970, now seen corresponding path program 4 times [2024-06-04 15:48:30,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:48:30,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892179493] [2024-06-04 15:48:30,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:48:30,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:48:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:48:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:48:31,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:48:31,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892179493] [2024-06-04 15:48:31,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892179493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:48:31,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:48:31,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:48:31,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890161597] [2024-06-04 15:48:31,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:48:31,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:48:31,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:48:31,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:48:31,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:48:31,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:48:31,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 561 transitions, 8656 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:48:31,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:48:31,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:48:31,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:48:34,175 INFO L124 PetriNetUnfolderBase]: 5925/9225 cut-off events. [2024-06-04 15:48:34,176 INFO L125 PetriNetUnfolderBase]: For 941482/941486 co-relation queries the response was YES. [2024-06-04 15:48:34,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75020 conditions, 9225 events. 5925/9225 cut-off events. For 941482/941486 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 57475 event pairs, 1767 based on Foata normal form. 6/9231 useless extension candidates. Maximal degree in co-relation 74810. Up to 8940 conditions per place. [2024-06-04 15:48:34,327 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 514 selfloop transitions, 78 changer transitions 0/595 dead transitions. [2024-06-04 15:48:34,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 595 transitions, 10444 flow [2024-06-04 15:48:34,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:48:34,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:48:34,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-04 15:48:34,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-04 15:48:34,328 INFO L175 Difference]: Start difference. First operand has 441 places, 561 transitions, 8656 flow. Second operand 8 states and 133 transitions. [2024-06-04 15:48:34,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 595 transitions, 10444 flow [2024-06-04 15:48:39,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 595 transitions, 10186 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 15:48:39,339 INFO L231 Difference]: Finished difference. Result has 442 places, 570 transitions, 8910 flow [2024-06-04 15:48:39,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8400, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8910, PETRI_PLACES=442, PETRI_TRANSITIONS=570} [2024-06-04 15:48:39,340 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-04 15:48:39,340 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 570 transitions, 8910 flow [2024-06-04 15:48:39,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:48:39,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:48:39,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:48:39,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 15:48:39,340 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)] === [2024-06-04 15:48:39,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:48:39,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1250446696, now seen corresponding path program 4 times [2024-06-04 15:48:39,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:48:39,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122908131] [2024-06-04 15:48:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:48:39,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:48:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:48:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:48:40,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:48:40,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122908131] [2024-06-04 15:48:40,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122908131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:48:40,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:48:40,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:48:40,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626253322] [2024-06-04 15:48:40,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:48:40,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:48:40,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:48:40,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:48:40,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:48:40,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:48:40,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 570 transitions, 8910 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:48:40,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:48:40,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:48:40,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:48:42,895 INFO L124 PetriNetUnfolderBase]: 5977/9298 cut-off events. [2024-06-04 15:48:42,895 INFO L125 PetriNetUnfolderBase]: For 972382/972394 co-relation queries the response was YES. [2024-06-04 15:48:43,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76279 conditions, 9298 events. 5977/9298 cut-off events. For 972382/972394 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 57936 event pairs, 1772 based on Foata normal form. 16/9314 useless extension candidates. Maximal degree in co-relation 76069. Up to 8957 conditions per place. [2024-06-04 15:48:43,048 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 507 selfloop transitions, 91 changer transitions 0/601 dead transitions. [2024-06-04 15:48:43,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 601 transitions, 10564 flow [2024-06-04 15:48:43,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:48:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:48:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-04 15:48:43,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-04 15:48:43,049 INFO L175 Difference]: Start difference. First operand has 442 places, 570 transitions, 8910 flow. Second operand 8 states and 137 transitions. [2024-06-04 15:48:43,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 601 transitions, 10564 flow [2024-06-04 15:48:47,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 601 transitions, 10361 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-04 15:48:47,175 INFO L231 Difference]: Finished difference. Result has 445 places, 576 transitions, 9071 flow [2024-06-04 15:48:47,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8713, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9071, PETRI_PLACES=445, PETRI_TRANSITIONS=576} [2024-06-04 15:48:47,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-04 15:48:47,176 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 576 transitions, 9071 flow [2024-06-04 15:48:47,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:48:47,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:48:47,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:48:47,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 15:48:47,176 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)] === [2024-06-04 15:48:47,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:48:47,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1027977190, now seen corresponding path program 5 times [2024-06-04 15:48:47,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:48:47,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661430614] [2024-06-04 15:48:47,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:48:47,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:48:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:48:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:48:47,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:48:47,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661430614] [2024-06-04 15:48:47,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661430614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:48:47,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:48:47,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:48:47,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247699356] [2024-06-04 15:48:47,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:48:47,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:48:47,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:48:47,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:48:47,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:48:48,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:48:48,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 576 transitions, 9071 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:48:48,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:48:48,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:48:48,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:48:50,684 INFO L124 PetriNetUnfolderBase]: 6027/9369 cut-off events. [2024-06-04 15:48:50,684 INFO L125 PetriNetUnfolderBase]: For 955624/955628 co-relation queries the response was YES. [2024-06-04 15:48:50,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77040 conditions, 9369 events. 6027/9369 cut-off events. For 955624/955628 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 58422 event pairs, 1809 based on Foata normal form. 6/9375 useless extension candidates. Maximal degree in co-relation 76829. Up to 9165 conditions per place. [2024-06-04 15:48:50,869 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 544 selfloop transitions, 68 changer transitions 0/615 dead transitions. [2024-06-04 15:48:50,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 615 transitions, 10872 flow [2024-06-04 15:48:50,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:48:50,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:48:50,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-04 15:48:50,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36243386243386244 [2024-06-04 15:48:50,870 INFO L175 Difference]: Start difference. First operand has 445 places, 576 transitions, 9071 flow. Second operand 9 states and 137 transitions. [2024-06-04 15:48:50,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 615 transitions, 10872 flow [2024-06-04 15:48:55,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 615 transitions, 10693 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-04 15:48:55,471 INFO L231 Difference]: Finished difference. Result has 453 places, 595 transitions, 9559 flow [2024-06-04 15:48:55,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8904, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9559, PETRI_PLACES=453, PETRI_TRANSITIONS=595} [2024-06-04 15:48:55,471 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 410 predicate places. [2024-06-04 15:48:55,472 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 595 transitions, 9559 flow [2024-06-04 15:48:55,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:48:55,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:48:55,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:48:55,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 15:48:55,472 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)] === [2024-06-04 15:48:55,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:48:55,472 INFO L85 PathProgramCache]: Analyzing trace with hash 644126414, now seen corresponding path program 5 times [2024-06-04 15:48:55,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:48:55,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71722960] [2024-06-04 15:48:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:48:55,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:48:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:48:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:48:56,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:48:56,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71722960] [2024-06-04 15:48:56,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71722960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:48:56,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:48:56,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:48:56,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260502772] [2024-06-04 15:48:56,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:48:56,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:48:56,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:48:56,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:48:56,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:48:56,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:48:56,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 595 transitions, 9559 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:48:56,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:48:56,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:48:56,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:48:59,142 INFO L124 PetriNetUnfolderBase]: 6047/9398 cut-off events. [2024-06-04 15:48:59,142 INFO L125 PetriNetUnfolderBase]: For 962036/962040 co-relation queries the response was YES. [2024-06-04 15:48:59,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77178 conditions, 9398 events. 6047/9398 cut-off events. For 962036/962040 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 58503 event pairs, 1808 based on Foata normal form. 8/9406 useless extension candidates. Maximal degree in co-relation 76963. Up to 9154 conditions per place. [2024-06-04 15:48:59,324 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 537 selfloop transitions, 80 changer transitions 0/620 dead transitions. [2024-06-04 15:48:59,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 620 transitions, 10975 flow [2024-06-04 15:48:59,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:48:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:48:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 15:48:59,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 15:48:59,325 INFO L175 Difference]: Start difference. First operand has 453 places, 595 transitions, 9559 flow. Second operand 8 states and 128 transitions. [2024-06-04 15:48:59,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 620 transitions, 10975 flow [2024-06-04 15:49:03,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 620 transitions, 10813 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-04 15:49:03,451 INFO L231 Difference]: Finished difference. Result has 457 places, 600 transitions, 9679 flow [2024-06-04 15:49:03,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9397, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9679, PETRI_PLACES=457, PETRI_TRANSITIONS=600} [2024-06-04 15:49:03,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 414 predicate places. [2024-06-04 15:49:03,452 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 600 transitions, 9679 flow [2024-06-04 15:49:03,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:49:03,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:49:03,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:49:03,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 15:49:03,452 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)] === [2024-06-04 15:49:03,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:49:03,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1205108710, now seen corresponding path program 6 times [2024-06-04 15:49:03,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:49:03,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118725002] [2024-06-04 15:49:03,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:49:03,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:49:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:49:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:49:04,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:49:04,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118725002] [2024-06-04 15:49:04,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118725002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:49:04,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:49:04,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:49:04,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161745181] [2024-06-04 15:49:04,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:49:04,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:49:04,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:49:04,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:49:04,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:49:04,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:49:04,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 600 transitions, 9679 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:49:04,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:49:04,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:49:04,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:49:07,216 INFO L124 PetriNetUnfolderBase]: 6067/9425 cut-off events. [2024-06-04 15:49:07,217 INFO L125 PetriNetUnfolderBase]: For 972475/972479 co-relation queries the response was YES. [2024-06-04 15:49:07,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77971 conditions, 9425 events. 6067/9425 cut-off events. For 972475/972479 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 58774 event pairs, 1818 based on Foata normal form. 6/9431 useless extension candidates. Maximal degree in co-relation 77754. Up to 9257 conditions per place. [2024-06-04 15:49:07,368 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 557 selfloop transitions, 63 changer transitions 0/623 dead transitions. [2024-06-04 15:49:07,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 623 transitions, 11152 flow [2024-06-04 15:49:07,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:49:07,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:49:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-04 15:49:07,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-04 15:49:07,369 INFO L175 Difference]: Start difference. First operand has 457 places, 600 transitions, 9679 flow. Second operand 8 states and 123 transitions. [2024-06-04 15:49:07,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 623 transitions, 11152 flow [2024-06-04 15:49:11,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 623 transitions, 11020 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-04 15:49:11,221 INFO L231 Difference]: Finished difference. Result has 464 places, 606 transitions, 9871 flow [2024-06-04 15:49:11,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9547, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9871, PETRI_PLACES=464, PETRI_TRANSITIONS=606} [2024-06-04 15:49:11,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-04 15:49:11,223 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 606 transitions, 9871 flow [2024-06-04 15:49:11,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:49:11,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:49:11,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:49:11,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 15:49:11,224 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)] === [2024-06-04 15:49:11,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:49:11,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1205108896, now seen corresponding path program 6 times [2024-06-04 15:49:11,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:49:11,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40994351] [2024-06-04 15:49:11,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:49:11,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:49:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:49:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:49:12,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:49:12,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40994351] [2024-06-04 15:49:12,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40994351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:49:12,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:49:12,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:49:12,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867086716] [2024-06-04 15:49:12,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:49:12,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:49:12,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:49:12,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:49:12,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:49:12,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:49:12,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 606 transitions, 9871 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:49:12,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:49:12,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:49:12,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:49:14,883 INFO L124 PetriNetUnfolderBase]: 6107/9482 cut-off events. [2024-06-04 15:49:14,883 INFO L125 PetriNetUnfolderBase]: For 1002231/1002235 co-relation queries the response was YES. [2024-06-04 15:49:15,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78441 conditions, 9482 events. 6107/9482 cut-off events. For 1002231/1002235 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 59053 event pairs, 1809 based on Foata normal form. 8/9490 useless extension candidates. Maximal degree in co-relation 78221. Up to 9188 conditions per place. [2024-06-04 15:49:15,061 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 542 selfloop transitions, 98 changer transitions 0/643 dead transitions. [2024-06-04 15:49:15,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 643 transitions, 11434 flow [2024-06-04 15:49:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:49:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:49:15,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-04 15:49:15,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-04 15:49:15,062 INFO L175 Difference]: Start difference. First operand has 464 places, 606 transitions, 9871 flow. Second operand 8 states and 132 transitions. [2024-06-04 15:49:15,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 643 transitions, 11434 flow [2024-06-04 15:49:19,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 643 transitions, 11245 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-04 15:49:19,931 INFO L231 Difference]: Finished difference. Result has 470 places, 623 transitions, 10173 flow [2024-06-04 15:49:19,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9682, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10173, PETRI_PLACES=470, PETRI_TRANSITIONS=623} [2024-06-04 15:49:19,931 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-04 15:49:19,932 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 623 transitions, 10173 flow [2024-06-04 15:49:19,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:49:19,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:49:19,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:49:19,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 15:49:19,932 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)] === [2024-06-04 15:49:19,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:49:19,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1726551880, now seen corresponding path program 2 times [2024-06-04 15:49:19,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:49:19,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491697176] [2024-06-04 15:49:19,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:49:19,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:49:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:49:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:49:21,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:49:21,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491697176] [2024-06-04 15:49:21,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491697176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:49:21,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:49:21,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:49:21,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457218634] [2024-06-04 15:49:21,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:49:21,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:49:21,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:49:21,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:49:21,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:49:21,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:49:21,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 623 transitions, 10173 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-04 15:49:21,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:49:21,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:49:21,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:49:24,318 INFO L124 PetriNetUnfolderBase]: 6123/9503 cut-off events. [2024-06-04 15:49:24,318 INFO L125 PetriNetUnfolderBase]: For 1003907/1003909 co-relation queries the response was YES. [2024-06-04 15:49:24,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79259 conditions, 9503 events. 6123/9503 cut-off events. For 1003907/1003909 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59244 event pairs, 1926 based on Foata normal form. 6/9509 useless extension candidates. Maximal degree in co-relation 79036. Up to 9260 conditions per place. [2024-06-04 15:49:24,524 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 567 selfloop transitions, 75 changer transitions 0/645 dead transitions. [2024-06-04 15:49:24,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 645 transitions, 11593 flow [2024-06-04 15:49:24,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:49:24,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:49:24,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-04 15:49:24,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-04 15:49:24,526 INFO L175 Difference]: Start difference. First operand has 470 places, 623 transitions, 10173 flow. Second operand 8 states and 129 transitions. [2024-06-04 15:49:24,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 645 transitions, 11593 flow [2024-06-04 15:49:28,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 645 transitions, 11458 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-04 15:49:28,337 INFO L231 Difference]: Finished difference. Result has 475 places, 625 transitions, 10253 flow [2024-06-04 15:49:28,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10038, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10253, PETRI_PLACES=475, PETRI_TRANSITIONS=625} [2024-06-04 15:49:28,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-04 15:49:28,345 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 625 transitions, 10253 flow [2024-06-04 15:49:28,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-04 15:49:28,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:49:28,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:49:28,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 15:49:28,346 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:49:28,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:49:28,347 INFO L85 PathProgramCache]: Analyzing trace with hash 221372615, now seen corresponding path program 14 times [2024-06-04 15:49:28,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:49:28,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124409986] [2024-06-04 15:49:28,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:49:28,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:49:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:49:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:49:30,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:49:30,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124409986] [2024-06-04 15:49:30,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124409986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:49:30,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:49:30,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:49:30,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178879529] [2024-06-04 15:49:30,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:49:30,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:49:30,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:49:30,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:49:30,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:49:30,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:49:30,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 625 transitions, 10253 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:49:30,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:49:30,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:49:30,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:49:33,130 INFO L124 PetriNetUnfolderBase]: 6164/9577 cut-off events. [2024-06-04 15:49:33,130 INFO L125 PetriNetUnfolderBase]: For 1037617/1037619 co-relation queries the response was YES. [2024-06-04 15:49:33,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79853 conditions, 9577 events. 6164/9577 cut-off events. For 1037617/1037619 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 59779 event pairs, 1214 based on Foata normal form. 14/9591 useless extension candidates. Maximal degree in co-relation 79629. Up to 8326 conditions per place. [2024-06-04 15:49:33,587 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 527 selfloop transitions, 138 changer transitions 0/668 dead transitions. [2024-06-04 15:49:33,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 668 transitions, 11829 flow [2024-06-04 15:49:33,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:49:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:49:33,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-04 15:49:33,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-04 15:49:33,593 INFO L175 Difference]: Start difference. First operand has 475 places, 625 transitions, 10253 flow. Second operand 10 states and 173 transitions. [2024-06-04 15:49:33,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 668 transitions, 11829 flow [2024-06-04 15:49:37,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 668 transitions, 11646 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 15:49:37,054 INFO L231 Difference]: Finished difference. Result has 479 places, 626 transitions, 10424 flow [2024-06-04 15:49:37,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10070, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10424, PETRI_PLACES=479, PETRI_TRANSITIONS=626} [2024-06-04 15:49:37,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-04 15:49:37,055 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 626 transitions, 10424 flow [2024-06-04 15:49:37,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:49:37,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:49:37,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:49:37,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 15:49:37,055 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)] === [2024-06-04 15:49:37,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:49:37,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2053317444, now seen corresponding path program 7 times [2024-06-04 15:49:37,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:49:37,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533269694] [2024-06-04 15:49:37,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:49:37,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:49:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:49:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:49:37,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:49:37,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533269694] [2024-06-04 15:49:37,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533269694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:49:37,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:49:37,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:49:37,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349107921] [2024-06-04 15:49:37,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:49:37,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:49:37,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:49:37,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:49:37,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:49:38,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:49:38,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 626 transitions, 10424 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:49:38,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:49:38,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:49:38,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:49:40,502 INFO L124 PetriNetUnfolderBase]: 6238/9681 cut-off events. [2024-06-04 15:49:40,502 INFO L125 PetriNetUnfolderBase]: For 1068874/1068878 co-relation queries the response was YES. [2024-06-04 15:49:40,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82650 conditions, 9681 events. 6238/9681 cut-off events. For 1068874/1068878 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 60602 event pairs, 1820 based on Foata normal form. 6/9687 useless extension candidates. Maximal degree in co-relation 82425. Up to 8883 conditions per place. [2024-06-04 15:49:40,668 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 537 selfloop transitions, 141 changer transitions 0/681 dead transitions. [2024-06-04 15:49:40,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 681 transitions, 13204 flow [2024-06-04 15:49:40,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:49:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:49:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 15:49:40,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-04 15:49:40,669 INFO L175 Difference]: Start difference. First operand has 479 places, 626 transitions, 10424 flow. Second operand 8 states and 139 transitions. [2024-06-04 15:49:40,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 681 transitions, 13204 flow [2024-06-04 15:49:44,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 681 transitions, 12868 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-04 15:49:44,811 INFO L231 Difference]: Finished difference. Result has 480 places, 653 transitions, 11209 flow [2024-06-04 15:49:44,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10088, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11209, PETRI_PLACES=480, PETRI_TRANSITIONS=653} [2024-06-04 15:49:44,811 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 437 predicate places. [2024-06-04 15:49:44,811 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 653 transitions, 11209 flow [2024-06-04 15:49:44,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:49:44,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:49:44,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:49:44,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 15:49:44,812 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:49:44,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:49:44,812 INFO L85 PathProgramCache]: Analyzing trace with hash 50670185, now seen corresponding path program 15 times [2024-06-04 15:49:44,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:49:44,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5864060] [2024-06-04 15:49:44,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:49:44,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:49:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:49:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:49:46,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:49:46,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5864060] [2024-06-04 15:49:46,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5864060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:49:46,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:49:46,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-04 15:49:46,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362856183] [2024-06-04 15:49:46,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:49:46,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 15:49:46,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:49:46,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 15:49:46,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-04 15:49:46,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:49:46,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 653 transitions, 11209 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 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) [2024-06-04 15:49:46,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:49:46,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:49:46,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:49:50,162 INFO L124 PetriNetUnfolderBase]: 6279/9750 cut-off events. [2024-06-04 15:49:50,162 INFO L125 PetriNetUnfolderBase]: For 1129629/1129631 co-relation queries the response was YES. [2024-06-04 15:49:50,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83938 conditions, 9750 events. 6279/9750 cut-off events. For 1129629/1129631 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 60888 event pairs, 1246 based on Foata normal form. 14/9764 useless extension candidates. Maximal degree in co-relation 83711. Up to 8697 conditions per place. [2024-06-04 15:49:50,430 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 592 selfloop transitions, 113 changer transitions 0/708 dead transitions. [2024-06-04 15:49:50,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 708 transitions, 12929 flow [2024-06-04 15:49:50,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 15:49:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 15:49:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 202 transitions. [2024-06-04 15:49:50,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-04 15:49:50,431 INFO L175 Difference]: Start difference. First operand has 480 places, 653 transitions, 11209 flow. Second operand 12 states and 202 transitions. [2024-06-04 15:49:50,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 708 transitions, 12929 flow [2024-06-04 15:49:55,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 708 transitions, 12725 flow, removed 84 selfloop flow, removed 2 redundant places. [2024-06-04 15:49:55,229 INFO L231 Difference]: Finished difference. Result has 490 places, 654 transitions, 11311 flow [2024-06-04 15:49:55,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11005, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11311, PETRI_PLACES=490, PETRI_TRANSITIONS=654} [2024-06-04 15:49:55,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 447 predicate places. [2024-06-04 15:49:55,229 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 654 transitions, 11311 flow [2024-06-04 15:49:55,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 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) [2024-06-04 15:49:55,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:49:55,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:49:55,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 15:49:55,229 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)] === [2024-06-04 15:49:55,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:49:55,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1979974632, now seen corresponding path program 7 times [2024-06-04 15:49:55,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:49:55,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967967943] [2024-06-04 15:49:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:49:55,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:49:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:49:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:49:56,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:49:56,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967967943] [2024-06-04 15:49:56,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967967943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:49:56,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:49:56,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:49:56,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264261681] [2024-06-04 15:49:56,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:49:56,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:49:56,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:49:56,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:49:56,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:49:56,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:49:56,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 654 transitions, 11311 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:49:56,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:49:56,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:49:56,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:49:59,652 INFO L124 PetriNetUnfolderBase]: 6341/9838 cut-off events. [2024-06-04 15:49:59,652 INFO L125 PetriNetUnfolderBase]: For 1145957/1145961 co-relation queries the response was YES. [2024-06-04 15:49:59,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85693 conditions, 9838 events. 6341/9838 cut-off events. For 1145957/1145961 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 61668 event pairs, 1838 based on Foata normal form. 8/9846 useless extension candidates. Maximal degree in co-relation 85464. Up to 9174 conditions per place. [2024-06-04 15:49:59,797 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 544 selfloop transitions, 145 changer transitions 0/692 dead transitions. [2024-06-04 15:49:59,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 692 transitions, 13515 flow [2024-06-04 15:49:59,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:49:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:49:59,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-04 15:49:59,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-04 15:49:59,798 INFO L175 Difference]: Start difference. First operand has 490 places, 654 transitions, 11311 flow. Second operand 8 states and 137 transitions. [2024-06-04 15:49:59,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 692 transitions, 13515 flow [2024-06-04 15:50:04,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 692 transitions, 13227 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-04 15:50:04,360 INFO L231 Difference]: Finished difference. Result has 489 places, 666 transitions, 11631 flow [2024-06-04 15:50:04,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11023, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11631, PETRI_PLACES=489, PETRI_TRANSITIONS=666} [2024-06-04 15:50:04,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-04 15:50:04,361 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 666 transitions, 11631 flow [2024-06-04 15:50:04,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:50:04,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:50:04,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:50:04,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 15:50:04,361 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:50:04,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:50:04,361 INFO L85 PathProgramCache]: Analyzing trace with hash 225405797, now seen corresponding path program 16 times [2024-06-04 15:50:04,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:50:04,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066732006] [2024-06-04 15:50:04,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:50:04,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:50:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:50:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:50:06,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:50:06,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066732006] [2024-06-04 15:50:06,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066732006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:50:06,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:50:06,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-04 15:50:06,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788821868] [2024-06-04 15:50:06,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:50:06,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 15:50:06,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:50:06,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 15:50:06,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-04 15:50:06,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:50:06,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 666 transitions, 11631 flow. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 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) [2024-06-04 15:50:06,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:50:06,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:50:06,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:50:09,850 INFO L124 PetriNetUnfolderBase]: 6382/9907 cut-off events. [2024-06-04 15:50:09,850 INFO L125 PetriNetUnfolderBase]: For 1196552/1196554 co-relation queries the response was YES. [2024-06-04 15:50:09,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86396 conditions, 9907 events. 6382/9907 cut-off events. For 1196552/1196554 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 62058 event pairs, 1252 based on Foata normal form. 14/9921 useless extension candidates. Maximal degree in co-relation 86165. Up to 8966 conditions per place. [2024-06-04 15:50:10,002 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 594 selfloop transitions, 110 changer transitions 0/707 dead transitions. [2024-06-04 15:50:10,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 707 transitions, 13279 flow [2024-06-04 15:50:10,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:50:10,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:50:10,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-04 15:50:10,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-04 15:50:10,003 INFO L175 Difference]: Start difference. First operand has 489 places, 666 transitions, 11631 flow. Second operand 10 states and 168 transitions. [2024-06-04 15:50:10,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 707 transitions, 13279 flow [2024-06-04 15:50:14,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 707 transitions, 13114 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-04 15:50:14,885 INFO L231 Difference]: Finished difference. Result has 497 places, 667 transitions, 11768 flow [2024-06-04 15:50:14,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11466, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11768, PETRI_PLACES=497, PETRI_TRANSITIONS=667} [2024-06-04 15:50:14,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-04 15:50:14,886 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 667 transitions, 11768 flow [2024-06-04 15:50:14,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 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) [2024-06-04 15:50:14,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:50:14,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:50:14,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 15:50:14,886 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)] === [2024-06-04 15:50:14,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:50:14,887 INFO L85 PathProgramCache]: Analyzing trace with hash 2060467284, now seen corresponding path program 8 times [2024-06-04 15:50:14,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:50:14,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225564235] [2024-06-04 15:50:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:50:14,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:50:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:50:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:50:15,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:50:15,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225564235] [2024-06-04 15:50:15,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225564235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:50:15,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:50:15,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:50:15,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294183666] [2024-06-04 15:50:15,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:50:15,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:50:15,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:50:15,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:50:15,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:50:15,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:50:15,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 667 transitions, 11768 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:50:15,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:50:15,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:50:15,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:50:18,889 INFO L124 PetriNetUnfolderBase]: 6402/9937 cut-off events. [2024-06-04 15:50:18,889 INFO L125 PetriNetUnfolderBase]: For 1193765/1193769 co-relation queries the response was YES. [2024-06-04 15:50:19,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87276 conditions, 9937 events. 6402/9937 cut-off events. For 1193765/1193769 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 62561 event pairs, 1809 based on Foata normal form. 8/9945 useless extension candidates. Maximal degree in co-relation 87043. Up to 9119 conditions per place. [2024-06-04 15:50:19,041 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 536 selfloop transitions, 159 changer transitions 0/698 dead transitions. [2024-06-04 15:50:19,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 698 transitions, 13810 flow [2024-06-04 15:50:19,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:50:19,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:50:19,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-04 15:50:19,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-04 15:50:19,042 INFO L175 Difference]: Start difference. First operand has 497 places, 667 transitions, 11768 flow. Second operand 8 states and 138 transitions. [2024-06-04 15:50:19,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 698 transitions, 13810 flow [2024-06-04 15:50:23,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 698 transitions, 13498 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-04 15:50:23,752 INFO L231 Difference]: Finished difference. Result has 496 places, 671 transitions, 11897 flow [2024-06-04 15:50:23,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11456, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11897, PETRI_PLACES=496, PETRI_TRANSITIONS=671} [2024-06-04 15:50:23,753 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 453 predicate places. [2024-06-04 15:50:23,753 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 671 transitions, 11897 flow [2024-06-04 15:50:23,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:50:23,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:50:23,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:50:23,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 15:50:23,753 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:50:23,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:50:23,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1696566441, now seen corresponding path program 17 times [2024-06-04 15:50:23,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:50:23,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505356888] [2024-06-04 15:50:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:50:23,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:50:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:50:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:50:25,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:50:25,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505356888] [2024-06-04 15:50:25,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505356888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:50:25,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:50:25,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:50:25,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279031061] [2024-06-04 15:50:25,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:50:25,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:50:25,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:50:25,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:50:25,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:50:25,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:50:25,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 671 transitions, 11897 flow. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:50:25,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:50:25,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:50:25,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:50:28,706 INFO L124 PetriNetUnfolderBase]: 6382/9903 cut-off events. [2024-06-04 15:50:28,707 INFO L125 PetriNetUnfolderBase]: For 1185178/1185180 co-relation queries the response was YES. [2024-06-04 15:50:28,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85685 conditions, 9903 events. 6382/9903 cut-off events. For 1185178/1185180 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 61954 event pairs, 1212 based on Foata normal form. 14/9917 useless extension candidates. Maximal degree in co-relation 85452. Up to 8532 conditions per place. [2024-06-04 15:50:28,988 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 564 selfloop transitions, 148 changer transitions 0/715 dead transitions. [2024-06-04 15:50:28,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 715 transitions, 13381 flow [2024-06-04 15:50:28,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:50:28,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:50:28,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-04 15:50:28,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-04 15:50:28,990 INFO L175 Difference]: Start difference. First operand has 496 places, 671 transitions, 11897 flow. Second operand 10 states and 174 transitions. [2024-06-04 15:50:28,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 715 transitions, 13381 flow [2024-06-04 15:50:33,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 715 transitions, 12998 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-04 15:50:33,676 INFO L231 Difference]: Finished difference. Result has 500 places, 670 transitions, 11662 flow [2024-06-04 15:50:33,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11362, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11662, PETRI_PLACES=500, PETRI_TRANSITIONS=670} [2024-06-04 15:50:33,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 457 predicate places. [2024-06-04 15:50:33,677 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 670 transitions, 11662 flow [2024-06-04 15:50:33,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:50:33,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:50:33,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:50:33,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 15:50:33,678 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)] === [2024-06-04 15:50:33,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:50:33,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1984791292, now seen corresponding path program 9 times [2024-06-04 15:50:33,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:50:33,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507786758] [2024-06-04 15:50:33,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:50:33,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:50:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:50:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:50:34,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:50:34,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507786758] [2024-06-04 15:50:34,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507786758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:50:34,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:50:34,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:50:34,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784664299] [2024-06-04 15:50:34,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:50:34,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:50:34,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:50:34,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:50:34,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:50:34,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:50:34,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 670 transitions, 11662 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:50:34,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:50:34,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:50:34,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:50:37,631 INFO L124 PetriNetUnfolderBase]: 6426/9966 cut-off events. [2024-06-04 15:50:37,631 INFO L125 PetriNetUnfolderBase]: For 1176520/1176524 co-relation queries the response was YES. [2024-06-04 15:50:37,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86507 conditions, 9966 events. 6426/9966 cut-off events. For 1176520/1176524 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 62676 event pairs, 1805 based on Foata normal form. 8/9974 useless extension candidates. Maximal degree in co-relation 86273. Up to 9124 conditions per place. [2024-06-04 15:50:37,780 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 534 selfloop transitions, 165 changer transitions 0/702 dead transitions. [2024-06-04 15:50:37,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 702 transitions, 13831 flow [2024-06-04 15:50:37,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:50:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:50:37,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 15:50:37,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-04 15:50:37,781 INFO L175 Difference]: Start difference. First operand has 500 places, 670 transitions, 11662 flow. Second operand 8 states and 134 transitions. [2024-06-04 15:50:37,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 702 transitions, 13831 flow [2024-06-04 15:50:42,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 702 transitions, 13270 flow, removed 37 selfloop flow, removed 11 redundant places. [2024-06-04 15:50:42,635 INFO L231 Difference]: Finished difference. Result has 497 places, 677 transitions, 11635 flow [2024-06-04 15:50:42,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11101, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11635, PETRI_PLACES=497, PETRI_TRANSITIONS=677} [2024-06-04 15:50:42,636 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-04 15:50:42,636 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 677 transitions, 11635 flow [2024-06-04 15:50:42,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:50:42,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:50:42,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:50:42,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 15:50:42,636 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)] === [2024-06-04 15:50:42,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:50:42,636 INFO L85 PathProgramCache]: Analyzing trace with hash 2053437414, now seen corresponding path program 10 times [2024-06-04 15:50:42,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:50:42,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155610377] [2024-06-04 15:50:42,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:50:42,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:50:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:50:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:50:43,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:50:43,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155610377] [2024-06-04 15:50:43,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155610377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:50:43,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:50:43,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:50:43,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130841502] [2024-06-04 15:50:43,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:50:43,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:50:43,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:50:43,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:50:43,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:50:43,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:50:43,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 677 transitions, 11635 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:50:43,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:50:43,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:50:43,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand