./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix024_power.opt_pso.opt_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/mix024_power.opt_pso.opt_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/mix024_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix024_power.opt_pso.opt_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 [2024-06-03 19:27:19,422 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:27:19,500 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:27:19,510 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:27:19,510 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:27:19,524 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:27:19,525 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:27:19,525 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:27:19,525 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:27:19,526 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:27:19,526 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:27:19,526 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:27:19,527 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:27:19,527 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:27:19,527 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:27:19,528 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:27:19,528 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:27:19,528 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:27:19,528 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:27:19,529 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:27:19,529 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:27:19,529 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:27:19,530 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:27:19,530 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:27:19,530 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:27:19,531 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:27:19,531 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:27:19,531 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:27:19,531 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:27:19,532 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:27:19,532 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:27:19,532 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:27:19,532 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:27:19,533 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:27:19,533 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:27:19,533 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:27:19,533 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:27:19,534 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:27:19,534 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:27:19,534 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:27:19,534 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:27:19,534 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:27:19,535 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:27:19,535 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:27:19,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:27:19,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:27:19,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:27:19,730 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:27:19,730 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:27:19,731 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix024_power.opt_pso.opt_rmo.opt.i [2024-06-03 19:27:20,785 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:27:20,995 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:27:20,996 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix024_power.opt_pso.opt_rmo.opt.i [2024-06-03 19:27:21,009 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0a8a385d/c24df500885d4752937d220fcc10f4d8/FLAGeed892db0 [2024-06-03 19:27:21,020 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0a8a385d/c24df500885d4752937d220fcc10f4d8 [2024-06-03 19:27:21,022 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:27:21,023 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:27:21,023 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix024_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-03 19:27:21,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:27:21,210 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:27:21,213 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:27:21,213 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:27:21,217 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:27:21,217 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:27:21" (1/2) ... [2024-06-03 19:27:21,218 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d5de4bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:27:21, skipping insertion in model container [2024-06-03 19:27:21,218 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:27:21" (1/2) ... [2024-06-03 19:27:21,219 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5853db39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:27:21, skipping insertion in model container [2024-06-03 19:27:21,220 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:27:21" (2/2) ... [2024-06-03 19:27:21,220 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d5de4bc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:27:21, skipping insertion in model container [2024-06-03 19:27:21,220 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:27:21" (2/2) ... [2024-06-03 19:27:21,220 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:27:21,296 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:27:21,298 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0) [2024-06-03 19:27:21,298 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0) [2024-06-03 19:27:21,298 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0) [2024-06-03 19:27:21,298 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:27:21,298 INFO L106 edCorrectnessWitness]: ghost_update [L845-L845] multithreaded = 1; [2024-06-03 19:27:21,337 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:27:21,612 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:27:21,625 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:27:21,751 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:27:21,784 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:27:21,785 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:27:21 WrapperNode [2024-06-03 19:27:21,785 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:27:21,786 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:27:21,787 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:27:21,787 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:27:21,792 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:27:21" (1/1) ... [2024-06-03 19:27:21,805 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:27:21" (1/1) ... [2024-06-03 19:27:21,843 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-03 19:27:21,844 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:27:21,844 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:27:21,844 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:27:21,844 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:27:21,853 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:27:21" (1/1) ... [2024-06-03 19:27:21,853 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:27:21" (1/1) ... [2024-06-03 19:27:21,856 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:27:21" (1/1) ... [2024-06-03 19:27:21,868 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 19:27:21,868 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:27:21" (1/1) ... [2024-06-03 19:27:21,868 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:27:21" (1/1) ... [2024-06-03 19:27:21,887 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:27:21" (1/1) ... [2024-06-03 19:27:21,889 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:27:21" (1/1) ... [2024-06-03 19:27:21,890 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:27:21" (1/1) ... [2024-06-03 19:27:21,891 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:27:21" (1/1) ... [2024-06-03 19:27:21,902 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:27:21,902 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:27:21,903 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:27:21,903 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:27:21,903 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:27:21" (1/1) ... [2024-06-03 19:27:21,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:27:21,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:27:21,932 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 19:27:21,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 19:27:21,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:27:21,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:27:21,971 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:27:21,971 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:27:21,971 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:27:21,971 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:27:21,971 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:27:21,972 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:27:21,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:27:21,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:27:21,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:27:21,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:27:21,973 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:27:22,118 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:27:22,120 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:27:22,438 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:27:22,440 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:27:22,633 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:27:22,634 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:27:22,635 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:27:22 BoogieIcfgContainer [2024-06-03 19:27:22,635 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:27:22,637 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:27:22,638 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:27:22,640 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:27:22,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:27:21" (1/4) ... [2024-06-03 19:27:22,641 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3092c32b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:27:22, skipping insertion in model container [2024-06-03 19:27:22,641 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:27:21" (2/4) ... [2024-06-03 19:27:22,641 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3092c32b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:27:22, skipping insertion in model container [2024-06-03 19:27:22,641 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:27:21" (3/4) ... [2024-06-03 19:27:22,642 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3092c32b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:27:22, skipping insertion in model container [2024-06-03 19:27:22,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:27:22" (4/4) ... [2024-06-03 19:27:22,643 INFO L112 eAbstractionObserver]: Analyzing ICFG mix024_power.opt_pso.opt_rmo.opt.i [2024-06-03 19:27:22,655 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:27:22,655 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 19:27:22,655 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:27:22,697 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:27:22,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-03 19:27:22,754 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-03 19:27:22,754 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:27:22,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:27:22,756 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-03 19:27:22,759 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-03 19:27:22,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:27:22,776 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;@61b98542, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:27:22,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 19:27:22,780 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:27:22,780 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:27:22,781 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:27:22,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:22,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:27:22,782 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:22,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:22,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1329062406, now seen corresponding path program 1 times [2024-06-03 19:27:22,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:22,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656460993] [2024-06-03 19:27:22,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:22,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:23,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:23,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656460993] [2024-06-03 19:27:23,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656460993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:23,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:23,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:27:23,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937725269] [2024-06-03 19:27:23,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:23,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:27:23,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:23,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:27:23,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:27:23,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-03 19:27:23,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:23,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:23,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-03 19:27:23,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:24,169 INFO L124 PetriNetUnfolderBase]: 1407/2254 cut-off events. [2024-06-03 19:27:24,169 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-03 19:27:24,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4460 conditions, 2254 events. 1407/2254 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11660 event pairs, 989 based on Foata normal form. 1/2163 useless extension candidates. Maximal degree in co-relation 4445. Up to 2105 conditions per place. [2024-06-03 19:27:24,186 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-03 19:27:24,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 181 flow [2024-06-03 19:27:24,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:27:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:27:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-03 19:27:24,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-06-03 19:27:24,196 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 80 transitions. [2024-06-03 19:27:24,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 181 flow [2024-06-03 19:27:24,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 19:27:24,202 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-03 19:27:24,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-03 19:27:24,207 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-03 19:27:24,207 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-03 19:27:24,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:24,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:24,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:24,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:27:24,209 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:24,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:24,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1623636071, now seen corresponding path program 1 times [2024-06-03 19:27:24,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:24,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996877708] [2024-06-03 19:27:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:24,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:24,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:24,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996877708] [2024-06-03 19:27:24,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996877708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:24,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:24,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:27:24,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597452306] [2024-06-03 19:27:24,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:24,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:27:24,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:24,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:27:24,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:27:24,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-03 19:27:24,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:24,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:24,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-03 19:27:24,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:25,138 INFO L124 PetriNetUnfolderBase]: 1653/2545 cut-off events. [2024-06-03 19:27:25,138 INFO L125 PetriNetUnfolderBase]: For 463/463 co-relation queries the response was YES. [2024-06-03 19:27:25,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5736 conditions, 2545 events. 1653/2545 cut-off events. For 463/463 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12823 event pairs, 1038 based on Foata normal form. 3/2533 useless extension candidates. Maximal degree in co-relation 5721. Up to 2441 conditions per place. [2024-06-03 19:27:25,153 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 42 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-03 19:27:25,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 250 flow [2024-06-03 19:27:25,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:27:25,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:27:25,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-03 19:27:25,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-03 19:27:25,157 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 100 transitions. [2024-06-03 19:27:25,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 250 flow [2024-06-03 19:27:25,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:27:25,159 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-03 19:27:25,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-03 19:27:25,160 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-03 19:27:25,160 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-03 19:27:25,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:25,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:25,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:25,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:27:25,169 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)] === [2024-06-03 19:27:25,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:25,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1206890949, now seen corresponding path program 1 times [2024-06-03 19:27:25,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:25,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042383464] [2024-06-03 19:27:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:25,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:25,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:25,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042383464] [2024-06-03 19:27:25,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042383464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:25,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:25,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:27:25,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753623745] [2024-06-03 19:27:25,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:25,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:27:25,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:25,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:27:25,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:27:25,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:27:25,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:25,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:25,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:27:25,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:26,207 INFO L124 PetriNetUnfolderBase]: 1947/2974 cut-off events. [2024-06-03 19:27:26,208 INFO L125 PetriNetUnfolderBase]: For 1495/1495 co-relation queries the response was YES. [2024-06-03 19:27:26,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7389 conditions, 2974 events. 1947/2974 cut-off events. For 1495/1495 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14660 event pairs, 1135 based on Foata normal form. 3/2960 useless extension candidates. Maximal degree in co-relation 7372. Up to 2853 conditions per place. [2024-06-03 19:27:26,250 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 50 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-03 19:27:26,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 330 flow [2024-06-03 19:27:26,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:27:26,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:27:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-03 19:27:26,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-06-03 19:27:26,252 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 118 transitions. [2024-06-03 19:27:26,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 330 flow [2024-06-03 19:27:26,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 316 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 19:27:26,254 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 178 flow [2024-06-03 19:27:26,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-03 19:27:26,255 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2024-06-03 19:27:26,255 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 178 flow [2024-06-03 19:27:26,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:26,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:26,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:26,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:27:26,255 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:26,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:26,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1241084616, now seen corresponding path program 1 times [2024-06-03 19:27:26,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:26,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169470851] [2024-06-03 19:27:26,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:26,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:26,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:26,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:26,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169470851] [2024-06-03 19:27:26,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169470851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:26,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:26,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:27:26,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996293057] [2024-06-03 19:27:26,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:26,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:27:26,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:26,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:27:26,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:27:26,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:27:26,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 178 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:26,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:26,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:27:26,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:27,287 INFO L124 PetriNetUnfolderBase]: 1935/2940 cut-off events. [2024-06-03 19:27:27,287 INFO L125 PetriNetUnfolderBase]: For 2815/2815 co-relation queries the response was YES. [2024-06-03 19:27:27,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8000 conditions, 2940 events. 1935/2940 cut-off events. For 2815/2815 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14453 event pairs, 843 based on Foata normal form. 6/2934 useless extension candidates. Maximal degree in co-relation 7982. Up to 2805 conditions per place. [2024-06-03 19:27:27,301 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 58 selfloop transitions, 13 changer transitions 0/76 dead transitions. [2024-06-03 19:27:27,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 76 transitions, 412 flow [2024-06-03 19:27:27,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:27:27,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:27:27,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-03 19:27:27,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-06-03 19:27:27,303 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 178 flow. Second operand 6 states and 140 transitions. [2024-06-03 19:27:27,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 76 transitions, 412 flow [2024-06-03 19:27:27,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 76 transitions, 388 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:27:27,306 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 214 flow [2024-06-03 19:27:27,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-06-03 19:27:27,306 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-03 19:27:27,307 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 214 flow [2024-06-03 19:27:27,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:27,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:27,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:27,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:27:27,307 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:27,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:27,308 INFO L85 PathProgramCache]: Analyzing trace with hash -885408401, now seen corresponding path program 1 times [2024-06-03 19:27:27,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:27,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511646521] [2024-06-03 19:27:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:27,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:27,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:28,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:28,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511646521] [2024-06-03 19:27:28,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511646521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:28,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:28,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:27:28,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647148741] [2024-06-03 19:27:28,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:28,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:27:28,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:28,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:27:28,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:27:28,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-03 19:27:28,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:28,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:28,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-03 19:27:28,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:28,505 INFO L124 PetriNetUnfolderBase]: 1556/2547 cut-off events. [2024-06-03 19:27:28,505 INFO L125 PetriNetUnfolderBase]: For 3635/3635 co-relation queries the response was YES. [2024-06-03 19:27:28,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7323 conditions, 2547 events. 1556/2547 cut-off events. For 3635/3635 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13463 event pairs, 785 based on Foata normal form. 2/2505 useless extension candidates. Maximal degree in co-relation 7304. Up to 2304 conditions per place. [2024-06-03 19:27:28,517 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 45 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-03 19:27:28,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 364 flow [2024-06-03 19:27:28,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:27:28,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:27:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-03 19:27:28,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-03 19:27:28,519 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 214 flow. Second operand 5 states and 107 transitions. [2024-06-03 19:27:28,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 364 flow [2024-06-03 19:27:28,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 330 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 19:27:28,522 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 226 flow [2024-06-03 19:27:28,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-03 19:27:28,523 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2024-06-03 19:27:28,523 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 226 flow [2024-06-03 19:27:28,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:28,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:28,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:28,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:27:28,524 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:28,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:28,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1686793009, now seen corresponding path program 1 times [2024-06-03 19:27:28,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:28,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516100635] [2024-06-03 19:27:28,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:28,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:29,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:29,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516100635] [2024-06-03 19:27:29,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516100635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:29,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:29,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:27:29,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926703493] [2024-06-03 19:27:29,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:29,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:27:29,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:29,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:27:29,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:27:29,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:27:29,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 226 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:29,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:29,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:27:29,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:29,702 INFO L124 PetriNetUnfolderBase]: 1842/2877 cut-off events. [2024-06-03 19:27:29,702 INFO L125 PetriNetUnfolderBase]: For 5868/5868 co-relation queries the response was YES. [2024-06-03 19:27:29,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8954 conditions, 2877 events. 1842/2877 cut-off events. For 5868/5868 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14530 event pairs, 927 based on Foata normal form. 3/2878 useless extension candidates. Maximal degree in co-relation 8933. Up to 2684 conditions per place. [2024-06-03 19:27:29,724 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 54 selfloop transitions, 17 changer transitions 0/78 dead transitions. [2024-06-03 19:27:29,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 78 transitions, 484 flow [2024-06-03 19:27:29,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:27:29,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:27:29,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-03 19:27:29,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4810606060606061 [2024-06-03 19:27:29,725 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 226 flow. Second operand 6 states and 127 transitions. [2024-06-03 19:27:29,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 78 transitions, 484 flow [2024-06-03 19:27:29,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 78 transitions, 462 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 19:27:29,730 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 329 flow [2024-06-03 19:27:29,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=329, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2024-06-03 19:27:29,733 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 15 predicate places. [2024-06-03 19:27:29,733 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 329 flow [2024-06-03 19:27:29,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:29,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:29,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:29,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:27:29,734 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)] === [2024-06-03 19:27:29,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:29,734 INFO L85 PathProgramCache]: Analyzing trace with hash -758603230, now seen corresponding path program 1 times [2024-06-03 19:27:29,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:29,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642263368] [2024-06-03 19:27:29,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:29,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:30,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:30,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642263368] [2024-06-03 19:27:30,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642263368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:30,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:30,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:27:30,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289566449] [2024-06-03 19:27:30,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:30,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:27:30,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:30,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:27:30,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:27:30,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:27:30,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 329 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:30,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:30,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:27:30,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:30,912 INFO L124 PetriNetUnfolderBase]: 1902/2983 cut-off events. [2024-06-03 19:27:30,912 INFO L125 PetriNetUnfolderBase]: For 9315/9325 co-relation queries the response was YES. [2024-06-03 19:27:30,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10395 conditions, 2983 events. 1902/2983 cut-off events. For 9315/9325 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15189 event pairs, 932 based on Foata normal form. 2/2972 useless extension candidates. Maximal degree in co-relation 10371. Up to 2774 conditions per place. [2024-06-03 19:27:30,928 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 61 selfloop transitions, 11 changer transitions 0/82 dead transitions. [2024-06-03 19:27:30,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 82 transitions, 543 flow [2024-06-03 19:27:30,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:27:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:27:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-03 19:27:30,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-03 19:27:30,930 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 329 flow. Second operand 6 states and 124 transitions. [2024-06-03 19:27:30,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 82 transitions, 543 flow [2024-06-03 19:27:30,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 82 transitions, 527 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-03 19:27:30,936 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 373 flow [2024-06-03 19:27:30,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=373, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-06-03 19:27:30,937 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2024-06-03 19:27:30,937 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 373 flow [2024-06-03 19:27:30,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:30,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:30,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:30,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:27:30,938 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:30,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:30,938 INFO L85 PathProgramCache]: Analyzing trace with hash -473928370, now seen corresponding path program 2 times [2024-06-03 19:27:30,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:30,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673925574] [2024-06-03 19:27:30,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:30,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:31,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:31,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673925574] [2024-06-03 19:27:31,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673925574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:31,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:31,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:27:31,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304828864] [2024-06-03 19:27:31,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:31,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:27:31,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:31,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:27:31,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:27:31,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:27:31,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 373 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:31,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:31,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:27:31,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:32,180 INFO L124 PetriNetUnfolderBase]: 1897/2978 cut-off events. [2024-06-03 19:27:32,180 INFO L125 PetriNetUnfolderBase]: For 12008/12030 co-relation queries the response was YES. [2024-06-03 19:27:32,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11044 conditions, 2978 events. 1897/2978 cut-off events. For 12008/12030 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15143 event pairs, 939 based on Foata normal form. 10/2974 useless extension candidates. Maximal degree in co-relation 11017. Up to 2749 conditions per place. [2024-06-03 19:27:32,197 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 56 selfloop transitions, 16 changer transitions 0/82 dead transitions. [2024-06-03 19:27:32,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 585 flow [2024-06-03 19:27:32,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:27:32,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:27:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-03 19:27:32,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-03 19:27:32,200 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 373 flow. Second operand 6 states and 123 transitions. [2024-06-03 19:27:32,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 585 flow [2024-06-03 19:27:32,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 82 transitions, 549 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:27:32,207 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 413 flow [2024-06-03 19:27:32,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=413, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-03 19:27:32,209 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2024-06-03 19:27:32,209 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 413 flow [2024-06-03 19:27:32,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:32,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:32,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:32,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:27:32,210 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:32,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:32,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2145558751, now seen corresponding path program 1 times [2024-06-03 19:27:32,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:32,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645471245] [2024-06-03 19:27:32,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:32,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:33,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:33,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645471245] [2024-06-03 19:27:33,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645471245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:33,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:33,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:27:33,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659639399] [2024-06-03 19:27:33,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:33,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:27:33,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:33,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:27:33,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:27:33,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:27:33,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 413 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:33,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:33,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:27:33,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:33,868 INFO L124 PetriNetUnfolderBase]: 1997/3050 cut-off events. [2024-06-03 19:27:33,868 INFO L125 PetriNetUnfolderBase]: For 14849/14863 co-relation queries the response was YES. [2024-06-03 19:27:33,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11921 conditions, 3050 events. 1997/3050 cut-off events. For 14849/14863 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14979 event pairs, 645 based on Foata normal form. 6/3029 useless extension candidates. Maximal degree in co-relation 11893. Up to 2843 conditions per place. [2024-06-03 19:27:33,885 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 85 selfloop transitions, 18 changer transitions 0/111 dead transitions. [2024-06-03 19:27:33,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 111 transitions, 751 flow [2024-06-03 19:27:33,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:33,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:33,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-03 19:27:33,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028409090909091 [2024-06-03 19:27:33,887 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 413 flow. Second operand 8 states and 177 transitions. [2024-06-03 19:27:33,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 111 transitions, 751 flow [2024-06-03 19:27:33,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 111 transitions, 699 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 19:27:33,896 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 444 flow [2024-06-03 19:27:33,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=444, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-06-03 19:27:33,897 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2024-06-03 19:27:33,897 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 444 flow [2024-06-03 19:27:33,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:33,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:33,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:33,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:27:33,898 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:33,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:33,898 INFO L85 PathProgramCache]: Analyzing trace with hash -473918450, now seen corresponding path program 1 times [2024-06-03 19:27:33,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:33,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962266260] [2024-06-03 19:27:33,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:33,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:34,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:34,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962266260] [2024-06-03 19:27:34,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962266260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:34,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:34,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:27:34,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068066183] [2024-06-03 19:27:34,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:34,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:27:34,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:34,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:27:34,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:27:35,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:27:35,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 444 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:35,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:35,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:27:35,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:35,473 INFO L124 PetriNetUnfolderBase]: 1832/2886 cut-off events. [2024-06-03 19:27:35,474 INFO L125 PetriNetUnfolderBase]: For 17584/17584 co-relation queries the response was YES. [2024-06-03 19:27:35,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11921 conditions, 2886 events. 1832/2886 cut-off events. For 17584/17584 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14711 event pairs, 727 based on Foata normal form. 3/2887 useless extension candidates. Maximal degree in co-relation 11892. Up to 2668 conditions per place. [2024-06-03 19:27:35,492 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 68 selfloop transitions, 21 changer transitions 0/96 dead transitions. [2024-06-03 19:27:35,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 96 transitions, 744 flow [2024-06-03 19:27:35,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:27:35,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:27:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-03 19:27:35,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-03 19:27:35,494 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 444 flow. Second operand 7 states and 145 transitions. [2024-06-03 19:27:35,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 96 transitions, 744 flow [2024-06-03 19:27:35,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 96 transitions, 687 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 19:27:35,502 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 480 flow [2024-06-03 19:27:35,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=480, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-03 19:27:35,504 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-06-03 19:27:35,505 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 480 flow [2024-06-03 19:27:35,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:35,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:35,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:35,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:27:35,506 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:35,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:35,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2042042442, now seen corresponding path program 1 times [2024-06-03 19:27:35,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:35,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729542759] [2024-06-03 19:27:35,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:35,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:36,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:36,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729542759] [2024-06-03 19:27:36,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729542759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:36,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:36,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:27:36,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330707440] [2024-06-03 19:27:36,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:36,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:27:36,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:36,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:27:36,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:27:36,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:27:36,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 480 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:36,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:36,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:27:36,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:36,911 INFO L124 PetriNetUnfolderBase]: 2082/3164 cut-off events. [2024-06-03 19:27:36,911 INFO L125 PetriNetUnfolderBase]: For 23489/23514 co-relation queries the response was YES. [2024-06-03 19:27:36,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13899 conditions, 3164 events. 2082/3164 cut-off events. For 23489/23514 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15410 event pairs, 816 based on Foata normal form. 7/3143 useless extension candidates. Maximal degree in co-relation 13868. Up to 2973 conditions per place. [2024-06-03 19:27:36,930 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 78 selfloop transitions, 21 changer transitions 0/108 dead transitions. [2024-06-03 19:27:36,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 108 transitions, 825 flow [2024-06-03 19:27:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:36,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:36,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:27:36,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-03 19:27:36,931 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 480 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:27:36,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 108 transitions, 825 flow [2024-06-03 19:27:36,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 108 transitions, 760 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 19:27:36,943 INFO L231 Difference]: Finished difference. Result has 79 places, 87 transitions, 580 flow [2024-06-03 19:27:36,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=580, PETRI_PLACES=79, PETRI_TRANSITIONS=87} [2024-06-03 19:27:36,943 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2024-06-03 19:27:36,943 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 87 transitions, 580 flow [2024-06-03 19:27:36,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:36,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:36,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:36,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:27:36,944 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:36,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:36,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1051914214, now seen corresponding path program 2 times [2024-06-03 19:27:36,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:36,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687704181] [2024-06-03 19:27:36,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:36,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:37,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:37,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687704181] [2024-06-03 19:27:37,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687704181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:37,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:37,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:27:37,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887786277] [2024-06-03 19:27:37,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:37,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:27:37,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:37,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:27:37,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:27:37,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:27:37,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 87 transitions, 580 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:37,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:37,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:27:37,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:38,211 INFO L124 PetriNetUnfolderBase]: 2119/3219 cut-off events. [2024-06-03 19:27:38,211 INFO L125 PetriNetUnfolderBase]: For 28168/28197 co-relation queries the response was YES. [2024-06-03 19:27:38,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14893 conditions, 3219 events. 2119/3219 cut-off events. For 28168/28197 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15680 event pairs, 796 based on Foata normal form. 11/3204 useless extension candidates. Maximal degree in co-relation 14858. Up to 3015 conditions per place. [2024-06-03 19:27:38,232 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 86 selfloop transitions, 33 changer transitions 0/128 dead transitions. [2024-06-03 19:27:38,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 128 transitions, 1035 flow [2024-06-03 19:27:38,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:38,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:38,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 19:27:38,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-03 19:27:38,234 INFO L175 Difference]: Start difference. First operand has 79 places, 87 transitions, 580 flow. Second operand 8 states and 156 transitions. [2024-06-03 19:27:38,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 128 transitions, 1035 flow [2024-06-03 19:27:38,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 128 transitions, 949 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-03 19:27:38,247 INFO L231 Difference]: Finished difference. Result has 86 places, 101 transitions, 740 flow [2024-06-03 19:27:38,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=740, PETRI_PLACES=86, PETRI_TRANSITIONS=101} [2024-06-03 19:27:38,247 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 41 predicate places. [2024-06-03 19:27:38,247 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 101 transitions, 740 flow [2024-06-03 19:27:38,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:38,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:38,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:38,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:27:38,248 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:38,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:38,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1667439954, now seen corresponding path program 3 times [2024-06-03 19:27:38,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:38,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508482265] [2024-06-03 19:27:38,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:38,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:38,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:38,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508482265] [2024-06-03 19:27:38,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508482265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:38,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:38,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:27:38,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966065037] [2024-06-03 19:27:38,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:38,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:27:38,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:38,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:27:39,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:27:39,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:27:39,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 101 transitions, 740 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:39,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:39,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:27:39,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:39,612 INFO L124 PetriNetUnfolderBase]: 2146/3260 cut-off events. [2024-06-03 19:27:39,612 INFO L125 PetriNetUnfolderBase]: For 33877/33900 co-relation queries the response was YES. [2024-06-03 19:27:39,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15910 conditions, 3260 events. 2146/3260 cut-off events. For 33877/33900 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15838 event pairs, 800 based on Foata normal form. 3/3237 useless extension candidates. Maximal degree in co-relation 15872. Up to 3011 conditions per place. [2024-06-03 19:27:39,630 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 80 selfloop transitions, 41 changer transitions 0/130 dead transitions. [2024-06-03 19:27:39,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 130 transitions, 1198 flow [2024-06-03 19:27:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:27:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:27:39,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-03 19:27:39,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-03 19:27:39,632 INFO L175 Difference]: Start difference. First operand has 86 places, 101 transitions, 740 flow. Second operand 7 states and 139 transitions. [2024-06-03 19:27:39,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 130 transitions, 1198 flow [2024-06-03 19:27:39,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 130 transitions, 1114 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 19:27:39,647 INFO L231 Difference]: Finished difference. Result has 88 places, 107 transitions, 848 flow [2024-06-03 19:27:39,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=848, PETRI_PLACES=88, PETRI_TRANSITIONS=107} [2024-06-03 19:27:39,648 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-03 19:27:39,648 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 107 transitions, 848 flow [2024-06-03 19:27:39,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:39,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:39,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:39,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:27:39,649 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:39,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:39,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1667439706, now seen corresponding path program 1 times [2024-06-03 19:27:39,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:39,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432762549] [2024-06-03 19:27:39,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:39,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:40,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:40,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432762549] [2024-06-03 19:27:40,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432762549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:40,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:40,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:27:40,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093737791] [2024-06-03 19:27:40,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:40,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:27:40,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:40,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:27:40,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:27:40,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:27:40,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 107 transitions, 848 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:40,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:40,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:27:40,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:41,018 INFO L124 PetriNetUnfolderBase]: 2241/3381 cut-off events. [2024-06-03 19:27:41,018 INFO L125 PetriNetUnfolderBase]: For 39714/39720 co-relation queries the response was YES. [2024-06-03 19:27:41,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17011 conditions, 3381 events. 2241/3381 cut-off events. For 39714/39720 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16417 event pairs, 827 based on Foata normal form. 9/3388 useless extension candidates. Maximal degree in co-relation 16972. Up to 3207 conditions per place. [2024-06-03 19:27:41,037 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 102 selfloop transitions, 25 changer transitions 0/142 dead transitions. [2024-06-03 19:27:41,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 142 transitions, 1362 flow [2024-06-03 19:27:41,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:27:41,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:27:41,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-03 19:27:41,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-03 19:27:41,039 INFO L175 Difference]: Start difference. First operand has 88 places, 107 transitions, 848 flow. Second operand 7 states and 143 transitions. [2024-06-03 19:27:41,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 142 transitions, 1362 flow [2024-06-03 19:27:41,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 142 transitions, 1292 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-03 19:27:41,059 INFO L231 Difference]: Finished difference. Result has 94 places, 118 transitions, 978 flow [2024-06-03 19:27:41,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=978, PETRI_PLACES=94, PETRI_TRANSITIONS=118} [2024-06-03 19:27:41,060 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-03 19:27:41,060 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 118 transitions, 978 flow [2024-06-03 19:27:41,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:41,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:41,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:41,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:27:41,061 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)] === [2024-06-03 19:27:41,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:41,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1805678974, now seen corresponding path program 2 times [2024-06-03 19:27:41,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:41,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563549906] [2024-06-03 19:27:41,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:41,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:41,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:41,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563549906] [2024-06-03 19:27:41,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563549906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:41,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:41,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:27:41,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595735407] [2024-06-03 19:27:41,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:41,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:27:41,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:41,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:27:41,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:27:41,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:27:41,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 118 transitions, 978 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:41,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:41,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:27:41,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:42,286 INFO L124 PetriNetUnfolderBase]: 2264/3416 cut-off events. [2024-06-03 19:27:42,286 INFO L125 PetriNetUnfolderBase]: For 47381/47393 co-relation queries the response was YES. [2024-06-03 19:27:42,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18407 conditions, 3416 events. 2264/3416 cut-off events. For 47381/47393 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16669 event pairs, 830 based on Foata normal form. 13/3425 useless extension candidates. Maximal degree in co-relation 18364. Up to 3156 conditions per place. [2024-06-03 19:27:42,310 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 93 selfloop transitions, 44 changer transitions 0/152 dead transitions. [2024-06-03 19:27:42,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 152 transitions, 1576 flow [2024-06-03 19:27:42,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:27:42,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:27:42,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-03 19:27:42,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-03 19:27:42,312 INFO L175 Difference]: Start difference. First operand has 94 places, 118 transitions, 978 flow. Second operand 7 states and 144 transitions. [2024-06-03 19:27:42,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 152 transitions, 1576 flow [2024-06-03 19:27:42,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 152 transitions, 1519 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-03 19:27:42,342 INFO L231 Difference]: Finished difference. Result has 100 places, 130 transitions, 1203 flow [2024-06-03 19:27:42,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1203, PETRI_PLACES=100, PETRI_TRANSITIONS=130} [2024-06-03 19:27:42,343 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 55 predicate places. [2024-06-03 19:27:42,343 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 130 transitions, 1203 flow [2024-06-03 19:27:42,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:42,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:42,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:42,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:27:42,344 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)] === [2024-06-03 19:27:42,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:42,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1662332022, now seen corresponding path program 4 times [2024-06-03 19:27:42,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:42,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870797244] [2024-06-03 19:27:42,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:42,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:43,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:43,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:43,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870797244] [2024-06-03 19:27:43,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870797244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:43,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:43,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:27:43,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386267541] [2024-06-03 19:27:43,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:43,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:27:43,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:43,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:27:43,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:27:43,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:27:43,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 130 transitions, 1203 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:43,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:43,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:27:43,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:43,708 INFO L124 PetriNetUnfolderBase]: 2260/3412 cut-off events. [2024-06-03 19:27:43,708 INFO L125 PetriNetUnfolderBase]: For 54362/54411 co-relation queries the response was YES. [2024-06-03 19:27:43,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19654 conditions, 3412 events. 2260/3412 cut-off events. For 54362/54411 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16417 event pairs, 776 based on Foata normal form. 5/3391 useless extension candidates. Maximal degree in co-relation 19608. Up to 3177 conditions per place. [2024-06-03 19:27:43,728 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 112 selfloop transitions, 46 changer transitions 0/173 dead transitions. [2024-06-03 19:27:43,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 173 transitions, 1760 flow [2024-06-03 19:27:43,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:43,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 19:27:43,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-03 19:27:43,729 INFO L175 Difference]: Start difference. First operand has 100 places, 130 transitions, 1203 flow. Second operand 8 states and 156 transitions. [2024-06-03 19:27:43,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 173 transitions, 1760 flow [2024-06-03 19:27:43,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 173 transitions, 1662 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-03 19:27:43,773 INFO L231 Difference]: Finished difference. Result has 108 places, 149 transitions, 1432 flow [2024-06-03 19:27:43,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1432, PETRI_PLACES=108, PETRI_TRANSITIONS=149} [2024-06-03 19:27:43,773 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-06-03 19:27:43,773 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 149 transitions, 1432 flow [2024-06-03 19:27:43,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:43,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:43,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:43,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:27:43,774 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)] === [2024-06-03 19:27:43,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:43,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1806876884, now seen corresponding path program 5 times [2024-06-03 19:27:43,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:43,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457396976] [2024-06-03 19:27:43,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:43,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:44,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:44,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457396976] [2024-06-03 19:27:44,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457396976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:44,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:44,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:27:44,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898315335] [2024-06-03 19:27:44,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:44,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:27:44,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:44,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:27:44,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:27:44,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:27:44,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 149 transitions, 1432 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:44,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:44,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:27:44,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:45,075 INFO L124 PetriNetUnfolderBase]: 2255/3408 cut-off events. [2024-06-03 19:27:45,075 INFO L125 PetriNetUnfolderBase]: For 55976/56017 co-relation queries the response was YES. [2024-06-03 19:27:45,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19436 conditions, 3408 events. 2255/3408 cut-off events. For 55976/56017 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16419 event pairs, 792 based on Foata normal form. 7/3381 useless extension candidates. Maximal degree in co-relation 19386. Up to 3094 conditions per place. [2024-06-03 19:27:45,095 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 94 selfloop transitions, 61 changer transitions 0/170 dead transitions. [2024-06-03 19:27:45,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 170 transitions, 1862 flow [2024-06-03 19:27:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:27:45,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:27:45,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-03 19:27:45,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-03 19:27:45,097 INFO L175 Difference]: Start difference. First operand has 108 places, 149 transitions, 1432 flow. Second operand 7 states and 136 transitions. [2024-06-03 19:27:45,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 170 transitions, 1862 flow [2024-06-03 19:27:45,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 170 transitions, 1787 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 19:27:45,137 INFO L231 Difference]: Finished difference. Result has 111 places, 152 transitions, 1551 flow [2024-06-03 19:27:45,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1551, PETRI_PLACES=111, PETRI_TRANSITIONS=152} [2024-06-03 19:27:45,138 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-03 19:27:45,138 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 152 transitions, 1551 flow [2024-06-03 19:27:45,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:45,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:45,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:45,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:27:45,139 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)] === [2024-06-03 19:27:45,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:45,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1806876636, now seen corresponding path program 3 times [2024-06-03 19:27:45,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:45,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942973552] [2024-06-03 19:27:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:45,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:45,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:45,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942973552] [2024-06-03 19:27:45,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942973552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:45,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:45,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:27:45,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784808054] [2024-06-03 19:27:45,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:45,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:27:45,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:45,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:27:45,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:27:45,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:27:45,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 152 transitions, 1551 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:45,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:45,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:27:45,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:46,428 INFO L124 PetriNetUnfolderBase]: 2281/3445 cut-off events. [2024-06-03 19:27:46,429 INFO L125 PetriNetUnfolderBase]: For 62387/62393 co-relation queries the response was YES. [2024-06-03 19:27:46,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20018 conditions, 3445 events. 2281/3445 cut-off events. For 62387/62393 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16743 event pairs, 829 based on Foata normal form. 7/3447 useless extension candidates. Maximal degree in co-relation 19967. Up to 3173 conditions per place. [2024-06-03 19:27:46,449 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 111 selfloop transitions, 42 changer transitions 0/173 dead transitions. [2024-06-03 19:27:46,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 173 transitions, 2027 flow [2024-06-03 19:27:46,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:27:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:27:46,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-03 19:27:46,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-03 19:27:46,450 INFO L175 Difference]: Start difference. First operand has 111 places, 152 transitions, 1551 flow. Second operand 7 states and 143 transitions. [2024-06-03 19:27:46,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 173 transitions, 2027 flow [2024-06-03 19:27:46,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 173 transitions, 1827 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-03 19:27:46,497 INFO L231 Difference]: Finished difference. Result has 113 places, 152 transitions, 1445 flow [2024-06-03 19:27:46,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1445, PETRI_PLACES=113, PETRI_TRANSITIONS=152} [2024-06-03 19:27:46,497 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-03 19:27:46,498 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 152 transitions, 1445 flow [2024-06-03 19:27:46,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:46,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:46,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:46,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:27:46,498 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)] === [2024-06-03 19:27:46,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:46,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1805379762, now seen corresponding path program 1 times [2024-06-03 19:27:46,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:46,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847530887] [2024-06-03 19:27:46,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:46,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:47,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:47,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847530887] [2024-06-03 19:27:47,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847530887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:47,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:47,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:47,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178749391] [2024-06-03 19:27:47,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:47,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:47,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:47,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:47,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:47,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:27:47,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 152 transitions, 1445 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:47,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:47,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:27:47,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:48,089 INFO L124 PetriNetUnfolderBase]: 1998/3161 cut-off events. [2024-06-03 19:27:48,090 INFO L125 PetriNetUnfolderBase]: For 58230/58230 co-relation queries the response was YES. [2024-06-03 19:27:48,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18120 conditions, 3161 events. 1998/3161 cut-off events. For 58230/58230 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16143 event pairs, 692 based on Foata normal form. 6/3165 useless extension candidates. Maximal degree in co-relation 18068. Up to 2859 conditions per place. [2024-06-03 19:27:48,110 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 134 selfloop transitions, 25 changer transitions 0/180 dead transitions. [2024-06-03 19:27:48,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 180 transitions, 1969 flow [2024-06-03 19:27:48,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:48,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:48,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-03 19:27:48,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-03 19:27:48,111 INFO L175 Difference]: Start difference. First operand has 113 places, 152 transitions, 1445 flow. Second operand 8 states and 164 transitions. [2024-06-03 19:27:48,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 180 transitions, 1969 flow [2024-06-03 19:27:48,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 180 transitions, 1819 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-03 19:27:48,155 INFO L231 Difference]: Finished difference. Result has 113 places, 155 transitions, 1411 flow [2024-06-03 19:27:48,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1411, PETRI_PLACES=113, PETRI_TRANSITIONS=155} [2024-06-03 19:27:48,156 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-03 19:27:48,156 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 155 transitions, 1411 flow [2024-06-03 19:27:48,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:48,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:48,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:48,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:27:48,156 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:48,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:48,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2043648777, now seen corresponding path program 1 times [2024-06-03 19:27:48,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:48,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121280195] [2024-06-03 19:27:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:48,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:48,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:48,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121280195] [2024-06-03 19:27:48,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121280195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:48,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:48,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:27:48,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579704064] [2024-06-03 19:27:48,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:48,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:27:48,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:48,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:27:48,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:27:48,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:27:48,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 155 transitions, 1411 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:48,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:48,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:27:48,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:49,507 INFO L124 PetriNetUnfolderBase]: 1996/3157 cut-off events. [2024-06-03 19:27:49,507 INFO L125 PetriNetUnfolderBase]: For 61814/61814 co-relation queries the response was YES. [2024-06-03 19:27:49,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18371 conditions, 3157 events. 1996/3157 cut-off events. For 61814/61814 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16084 event pairs, 711 based on Foata normal form. 1/3156 useless extension candidates. Maximal degree in co-relation 18321. Up to 2928 conditions per place. [2024-06-03 19:27:49,527 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 131 selfloop transitions, 10 changer transitions 0/162 dead transitions. [2024-06-03 19:27:49,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 162 transitions, 1715 flow [2024-06-03 19:27:49,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:27:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:27:49,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-03 19:27:49,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 19:27:49,529 INFO L175 Difference]: Start difference. First operand has 113 places, 155 transitions, 1411 flow. Second operand 6 states and 110 transitions. [2024-06-03 19:27:49,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 162 transitions, 1715 flow [2024-06-03 19:27:49,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 162 transitions, 1615 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 19:27:49,573 INFO L231 Difference]: Finished difference. Result has 113 places, 155 transitions, 1337 flow [2024-06-03 19:27:49,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1337, PETRI_PLACES=113, PETRI_TRANSITIONS=155} [2024-06-03 19:27:49,574 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-03 19:27:49,574 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 155 transitions, 1337 flow [2024-06-03 19:27:49,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:49,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:49,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:49,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:27:49,575 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:49,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:49,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1121044737, now seen corresponding path program 1 times [2024-06-03 19:27:49,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:49,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539151786] [2024-06-03 19:27:49,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:49,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:50,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:50,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539151786] [2024-06-03 19:27:50,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539151786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:50,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:50,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:50,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722183773] [2024-06-03 19:27:50,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:50,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:50,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:50,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:50,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:50,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:27:50,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 155 transitions, 1337 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:50,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:50,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:27:50,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:50,995 INFO L124 PetriNetUnfolderBase]: 2262/3430 cut-off events. [2024-06-03 19:27:50,995 INFO L125 PetriNetUnfolderBase]: For 77957/77977 co-relation queries the response was YES. [2024-06-03 19:27:51,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20752 conditions, 3430 events. 2262/3430 cut-off events. For 77957/77977 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16687 event pairs, 746 based on Foata normal form. 8/3422 useless extension candidates. Maximal degree in co-relation 20701. Up to 3143 conditions per place. [2024-06-03 19:27:51,014 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 131 selfloop transitions, 41 changer transitions 0/188 dead transitions. [2024-06-03 19:27:51,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 188 transitions, 1841 flow [2024-06-03 19:27:51,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:51,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:51,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:27:51,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-03 19:27:51,015 INFO L175 Difference]: Start difference. First operand has 113 places, 155 transitions, 1337 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:27:51,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 188 transitions, 1841 flow [2024-06-03 19:27:51,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 188 transitions, 1793 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 19:27:51,058 INFO L231 Difference]: Finished difference. Result has 116 places, 158 transitions, 1443 flow [2024-06-03 19:27:51,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1443, PETRI_PLACES=116, PETRI_TRANSITIONS=158} [2024-06-03 19:27:51,058 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 71 predicate places. [2024-06-03 19:27:51,058 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 158 transitions, 1443 flow [2024-06-03 19:27:51,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:51,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:51,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:51,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:27:51,059 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:51,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:51,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1121194467, now seen corresponding path program 2 times [2024-06-03 19:27:51,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:51,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865998571] [2024-06-03 19:27:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:51,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:51,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:51,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865998571] [2024-06-03 19:27:51,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865998571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:51,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:51,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:51,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106721977] [2024-06-03 19:27:51,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:51,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:51,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:51,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:51,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:51,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:27:51,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 158 transitions, 1443 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:51,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:51,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:27:51,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:52,509 INFO L124 PetriNetUnfolderBase]: 2284/3464 cut-off events. [2024-06-03 19:27:52,509 INFO L125 PetriNetUnfolderBase]: For 86859/86879 co-relation queries the response was YES. [2024-06-03 19:27:52,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21735 conditions, 3464 events. 2284/3464 cut-off events. For 86859/86879 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16863 event pairs, 746 based on Foata normal form. 8/3456 useless extension candidates. Maximal degree in co-relation 21685. Up to 3096 conditions per place. [2024-06-03 19:27:52,532 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 119 selfloop transitions, 55 changer transitions 0/190 dead transitions. [2024-06-03 19:27:52,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 190 transitions, 1955 flow [2024-06-03 19:27:52,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:52,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:52,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:27:52,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-03 19:27:52,534 INFO L175 Difference]: Start difference. First operand has 116 places, 158 transitions, 1443 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:27:52,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 190 transitions, 1955 flow [2024-06-03 19:27:52,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 190 transitions, 1825 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 19:27:52,583 INFO L231 Difference]: Finished difference. Result has 118 places, 161 transitions, 1506 flow [2024-06-03 19:27:52,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1506, PETRI_PLACES=118, PETRI_TRANSITIONS=161} [2024-06-03 19:27:52,584 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 73 predicate places. [2024-06-03 19:27:52,584 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 161 transitions, 1506 flow [2024-06-03 19:27:52,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:52,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:52,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:52,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:27:52,584 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:52,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:52,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1121194684, now seen corresponding path program 1 times [2024-06-03 19:27:52,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:52,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882788384] [2024-06-03 19:27:52,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:52,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:53,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:53,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882788384] [2024-06-03 19:27:53,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882788384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:53,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:53,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:53,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126438363] [2024-06-03 19:27:53,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:53,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:53,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:53,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:53,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:53,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:27:53,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 161 transitions, 1506 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-03 19:27:53,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:53,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:27:53,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:54,016 INFO L124 PetriNetUnfolderBase]: 2484/3690 cut-off events. [2024-06-03 19:27:54,016 INFO L125 PetriNetUnfolderBase]: For 97340/97342 co-relation queries the response was YES. [2024-06-03 19:27:54,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23629 conditions, 3690 events. 2484/3690 cut-off events. For 97340/97342 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17456 event pairs, 779 based on Foata normal form. 5/3693 useless extension candidates. Maximal degree in co-relation 23578. Up to 3465 conditions per place. [2024-06-03 19:27:54,040 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 143 selfloop transitions, 54 changer transitions 0/201 dead transitions. [2024-06-03 19:27:54,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 201 transitions, 2282 flow [2024-06-03 19:27:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:54,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:54,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 19:27:54,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-03 19:27:54,042 INFO L175 Difference]: Start difference. First operand has 118 places, 161 transitions, 1506 flow. Second operand 8 states and 157 transitions. [2024-06-03 19:27:54,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 201 transitions, 2282 flow [2024-06-03 19:27:54,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 201 transitions, 2123 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-03 19:27:54,119 INFO L231 Difference]: Finished difference. Result has 122 places, 172 transitions, 1683 flow [2024-06-03 19:27:54,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1683, PETRI_PLACES=122, PETRI_TRANSITIONS=172} [2024-06-03 19:27:54,119 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 77 predicate places. [2024-06-03 19:27:54,120 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 172 transitions, 1683 flow [2024-06-03 19:27:54,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-03 19:27:54,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:54,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:54,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:27:54,120 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:54,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:54,120 INFO L85 PathProgramCache]: Analyzing trace with hash -151022357, now seen corresponding path program 1 times [2024-06-03 19:27:54,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:54,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286868493] [2024-06-03 19:27:54,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:54,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:54,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:54,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286868493] [2024-06-03 19:27:54,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286868493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:54,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:54,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:54,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375562420] [2024-06-03 19:27:54,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:54,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:54,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:54,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:54,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:55,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:27:55,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 172 transitions, 1683 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:55,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:55,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:27:55,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:55,699 INFO L124 PetriNetUnfolderBase]: 2392/3607 cut-off events. [2024-06-03 19:27:55,699 INFO L125 PetriNetUnfolderBase]: For 106722/106724 co-relation queries the response was YES. [2024-06-03 19:27:55,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23907 conditions, 3607 events. 2392/3607 cut-off events. For 106722/106724 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17612 event pairs, 767 based on Foata normal form. 5/3610 useless extension candidates. Maximal degree in co-relation 23853. Up to 3363 conditions per place. [2024-06-03 19:27:55,720 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 147 selfloop transitions, 32 changer transitions 0/202 dead transitions. [2024-06-03 19:27:55,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 202 transitions, 2287 flow [2024-06-03 19:27:55,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:55,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:55,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-03 19:27:55,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-03 19:27:55,721 INFO L175 Difference]: Start difference. First operand has 122 places, 172 transitions, 1683 flow. Second operand 8 states and 160 transitions. [2024-06-03 19:27:55,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 202 transitions, 2287 flow [2024-06-03 19:27:55,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 202 transitions, 2187 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-03 19:27:55,798 INFO L231 Difference]: Finished difference. Result has 127 places, 176 transitions, 1732 flow [2024-06-03 19:27:55,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1583, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1732, PETRI_PLACES=127, PETRI_TRANSITIONS=176} [2024-06-03 19:27:55,798 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 82 predicate places. [2024-06-03 19:27:55,798 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 176 transitions, 1732 flow [2024-06-03 19:27:55,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:55,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:55,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:55,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:27:55,799 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:27:55,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:55,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1126766314, now seen corresponding path program 2 times [2024-06-03 19:27:55,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:55,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691424933] [2024-06-03 19:27:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:55,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:56,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:56,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691424933] [2024-06-03 19:27:56,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691424933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:56,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:56,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:56,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107432508] [2024-06-03 19:27:56,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:56,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:56,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:56,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:56,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:56,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:27:56,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 176 transitions, 1732 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-03 19:27:56,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:56,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:27:56,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:57,386 INFO L124 PetriNetUnfolderBase]: 2560/3799 cut-off events. [2024-06-03 19:27:57,387 INFO L125 PetriNetUnfolderBase]: For 118059/118059 co-relation queries the response was YES. [2024-06-03 19:27:57,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26333 conditions, 3799 events. 2560/3799 cut-off events. For 118059/118059 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18061 event pairs, 762 based on Foata normal form. 3/3800 useless extension candidates. Maximal degree in co-relation 26277. Up to 3477 conditions per place. [2024-06-03 19:27:57,416 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 141 selfloop transitions, 71 changer transitions 0/216 dead transitions. [2024-06-03 19:27:57,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 216 transitions, 2656 flow [2024-06-03 19:27:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:57,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:27:57,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-03 19:27:57,417 INFO L175 Difference]: Start difference. First operand has 127 places, 176 transitions, 1732 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:27:57,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 216 transitions, 2656 flow [2024-06-03 19:27:57,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 216 transitions, 2537 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-03 19:27:57,508 INFO L231 Difference]: Finished difference. Result has 130 places, 188 transitions, 2035 flow [2024-06-03 19:27:57,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2035, PETRI_PLACES=130, PETRI_TRANSITIONS=188} [2024-06-03 19:27:57,509 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 85 predicate places. [2024-06-03 19:27:57,509 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 188 transitions, 2035 flow [2024-06-03 19:27:57,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-03 19:27:57,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:57,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:57,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:27:57,509 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)] === [2024-06-03 19:27:57,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:57,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1126758874, now seen corresponding path program 3 times [2024-06-03 19:27:57,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:57,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709603352] [2024-06-03 19:27:57,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:57,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:58,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:58,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709603352] [2024-06-03 19:27:58,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709603352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:58,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:58,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:58,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54868999] [2024-06-03 19:27:58,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:58,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:58,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:58,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:58,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:58,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:27:58,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 188 transitions, 2035 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-03 19:27:58,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:58,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:27:58,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:27:58,942 INFO L124 PetriNetUnfolderBase]: 2554/3791 cut-off events. [2024-06-03 19:27:58,942 INFO L125 PetriNetUnfolderBase]: For 128952/128952 co-relation queries the response was YES. [2024-06-03 19:27:58,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27354 conditions, 3791 events. 2554/3791 cut-off events. For 128952/128952 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18015 event pairs, 762 based on Foata normal form. 3/3792 useless extension candidates. Maximal degree in co-relation 27296. Up to 3473 conditions per place. [2024-06-03 19:27:58,970 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 150 selfloop transitions, 61 changer transitions 0/215 dead transitions. [2024-06-03 19:27:58,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 215 transitions, 2695 flow [2024-06-03 19:27:58,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:27:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:27:58,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 19:27:58,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-03 19:27:58,972 INFO L175 Difference]: Start difference. First operand has 130 places, 188 transitions, 2035 flow. Second operand 8 states and 157 transitions. [2024-06-03 19:27:58,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 215 transitions, 2695 flow [2024-06-03 19:27:59,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 215 transitions, 2522 flow, removed 70 selfloop flow, removed 3 redundant places. [2024-06-03 19:27:59,074 INFO L231 Difference]: Finished difference. Result has 135 places, 188 transitions, 1994 flow [2024-06-03 19:27:59,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1994, PETRI_PLACES=135, PETRI_TRANSITIONS=188} [2024-06-03 19:27:59,074 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 90 predicate places. [2024-06-03 19:27:59,074 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 188 transitions, 1994 flow [2024-06-03 19:27:59,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-03 19:27:59,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:27:59,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:27:59,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:27:59,075 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)] === [2024-06-03 19:27:59,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:27:59,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1126758657, now seen corresponding path program 3 times [2024-06-03 19:27:59,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:27:59,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316659541] [2024-06-03 19:27:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:27:59,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:27:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:27:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:27:59,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:27:59,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316659541] [2024-06-03 19:27:59,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316659541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:27:59,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:27:59,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:27:59,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333981895] [2024-06-03 19:27:59,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:27:59,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:27:59,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:27:59,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:27:59,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:27:59,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:27:59,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 188 transitions, 1994 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:27:59,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:27:59,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:27:59,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:00,548 INFO L124 PetriNetUnfolderBase]: 2434/3674 cut-off events. [2024-06-03 19:28:00,548 INFO L125 PetriNetUnfolderBase]: For 133483/133517 co-relation queries the response was YES. [2024-06-03 19:28:00,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26584 conditions, 3674 events. 2434/3674 cut-off events. For 133483/133517 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17900 event pairs, 711 based on Foata normal form. 6/3664 useless extension candidates. Maximal degree in co-relation 26524. Up to 3232 conditions per place. [2024-06-03 19:28:00,575 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 141 selfloop transitions, 54 changer transitions 0/218 dead transitions. [2024-06-03 19:28:00,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 218 transitions, 2556 flow [2024-06-03 19:28:00,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:28:00,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:28:00,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:28:00,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-03 19:28:00,577 INFO L175 Difference]: Start difference. First operand has 135 places, 188 transitions, 1994 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:28:00,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 218 transitions, 2556 flow [2024-06-03 19:28:00,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 218 transitions, 2346 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-03 19:28:00,669 INFO L231 Difference]: Finished difference. Result has 135 places, 191 transitions, 1984 flow [2024-06-03 19:28:00,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1784, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1984, PETRI_PLACES=135, PETRI_TRANSITIONS=191} [2024-06-03 19:28:00,670 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 90 predicate places. [2024-06-03 19:28:00,670 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 191 transitions, 1984 flow [2024-06-03 19:28:00,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:00,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:00,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:00,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:28:00,671 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)] === [2024-06-03 19:28:00,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:00,671 INFO L85 PathProgramCache]: Analyzing trace with hash -132535069, now seen corresponding path program 2 times [2024-06-03 19:28:00,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:00,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560804012] [2024-06-03 19:28:00,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:00,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:01,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:01,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560804012] [2024-06-03 19:28:01,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560804012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:01,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:01,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:28:01,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431823912] [2024-06-03 19:28:01,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:01,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:28:01,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:01,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:28:01,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:28:01,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:28:01,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 191 transitions, 1984 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:01,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:01,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:28:01,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:02,441 INFO L124 PetriNetUnfolderBase]: 2480/3741 cut-off events. [2024-06-03 19:28:02,441 INFO L125 PetriNetUnfolderBase]: For 144308/144314 co-relation queries the response was YES. [2024-06-03 19:28:02,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27041 conditions, 3741 events. 2480/3741 cut-off events. For 144308/144314 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18306 event pairs, 771 based on Foata normal form. 7/3743 useless extension candidates. Maximal degree in co-relation 26982. Up to 3386 conditions per place. [2024-06-03 19:28:02,468 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 140 selfloop transitions, 53 changer transitions 0/219 dead transitions. [2024-06-03 19:28:02,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 219 transitions, 2638 flow [2024-06-03 19:28:02,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:02,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 19:28:02,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-03 19:28:02,477 INFO L175 Difference]: Start difference. First operand has 135 places, 191 transitions, 1984 flow. Second operand 9 states and 172 transitions. [2024-06-03 19:28:02,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 219 transitions, 2638 flow [2024-06-03 19:28:02,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 219 transitions, 2462 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-03 19:28:02,586 INFO L231 Difference]: Finished difference. Result has 138 places, 195 transitions, 2011 flow [2024-06-03 19:28:02,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2011, PETRI_PLACES=138, PETRI_TRANSITIONS=195} [2024-06-03 19:28:02,587 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 93 predicate places. [2024-06-03 19:28:02,587 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 195 transitions, 2011 flow [2024-06-03 19:28:02,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:02,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:02,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:02,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:28:02,588 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)] === [2024-06-03 19:28:02,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:02,588 INFO L85 PathProgramCache]: Analyzing trace with hash -132535348, now seen corresponding path program 4 times [2024-06-03 19:28:02,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:02,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957568120] [2024-06-03 19:28:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:02,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:03,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:03,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957568120] [2024-06-03 19:28:03,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957568120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:03,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:03,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:28:03,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336262830] [2024-06-03 19:28:03,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:03,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:28:03,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:03,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:28:03,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:28:03,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:28:03,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 195 transitions, 2011 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-03 19:28:03,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:03,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:28:03,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:04,086 INFO L124 PetriNetUnfolderBase]: 2620/3894 cut-off events. [2024-06-03 19:28:04,086 INFO L125 PetriNetUnfolderBase]: For 154275/154281 co-relation queries the response was YES. [2024-06-03 19:28:04,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28930 conditions, 3894 events. 2620/3894 cut-off events. For 154275/154281 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18635 event pairs, 771 based on Foata normal form. 7/3891 useless extension candidates. Maximal degree in co-relation 28870. Up to 3422 conditions per place. [2024-06-03 19:28:04,115 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 129 selfloop transitions, 100 changer transitions 0/233 dead transitions. [2024-06-03 19:28:04,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 233 transitions, 3015 flow [2024-06-03 19:28:04,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:28:04,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:28:04,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:28:04,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-03 19:28:04,121 INFO L175 Difference]: Start difference. First operand has 138 places, 195 transitions, 2011 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:28:04,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 233 transitions, 3015 flow [2024-06-03 19:28:04,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 233 transitions, 2854 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-03 19:28:04,233 INFO L231 Difference]: Finished difference. Result has 142 places, 207 transitions, 2371 flow [2024-06-03 19:28:04,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1850, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2371, PETRI_PLACES=142, PETRI_TRANSITIONS=207} [2024-06-03 19:28:04,234 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 97 predicate places. [2024-06-03 19:28:04,234 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 207 transitions, 2371 flow [2024-06-03 19:28:04,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-03 19:28:04,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:04,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:04,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:28:04,234 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)] === [2024-06-03 19:28:04,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:04,234 INFO L85 PathProgramCache]: Analyzing trace with hash -178607827, now seen corresponding path program 4 times [2024-06-03 19:28:04,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:04,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506363509] [2024-06-03 19:28:04,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:04,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:04,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:04,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506363509] [2024-06-03 19:28:04,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506363509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:04,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:04,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:28:04,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265549010] [2024-06-03 19:28:04,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:04,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:28:04,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:04,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:28:04,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:28:05,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:28:05,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 207 transitions, 2371 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:05,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:05,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:28:05,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:05,689 INFO L124 PetriNetUnfolderBase]: 2484/3755 cut-off events. [2024-06-03 19:28:05,689 INFO L125 PetriNetUnfolderBase]: For 165829/165886 co-relation queries the response was YES. [2024-06-03 19:28:05,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29219 conditions, 3755 events. 2484/3755 cut-off events. For 165829/165886 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18409 event pairs, 727 based on Foata normal form. 12/3742 useless extension candidates. Maximal degree in co-relation 29156. Up to 3250 conditions per place. [2024-06-03 19:28:05,719 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 146 selfloop transitions, 62 changer transitions 0/235 dead transitions. [2024-06-03 19:28:05,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 235 transitions, 2965 flow [2024-06-03 19:28:05,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:28:05,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:28:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 19:28:05,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-03 19:28:05,720 INFO L175 Difference]: Start difference. First operand has 142 places, 207 transitions, 2371 flow. Second operand 8 states and 157 transitions. [2024-06-03 19:28:05,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 235 transitions, 2965 flow [2024-06-03 19:28:05,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 235 transitions, 2831 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-03 19:28:05,848 INFO L231 Difference]: Finished difference. Result has 147 places, 210 transitions, 2465 flow [2024-06-03 19:28:05,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2243, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2465, PETRI_PLACES=147, PETRI_TRANSITIONS=210} [2024-06-03 19:28:05,848 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 102 predicate places. [2024-06-03 19:28:05,849 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 210 transitions, 2465 flow [2024-06-03 19:28:05,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:05,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:05,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:05,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:28:05,849 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)] === [2024-06-03 19:28:05,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:05,849 INFO L85 PathProgramCache]: Analyzing trace with hash 49146371, now seen corresponding path program 3 times [2024-06-03 19:28:05,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:05,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586347155] [2024-06-03 19:28:05,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:05,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:06,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:06,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586347155] [2024-06-03 19:28:06,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586347155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:06,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:06,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:28:06,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688325982] [2024-06-03 19:28:06,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:06,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:28:06,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:06,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:28:06,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:28:06,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:28:06,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 210 transitions, 2465 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:06,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:06,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:28:06,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:07,526 INFO L124 PetriNetUnfolderBase]: 2538/3830 cut-off events. [2024-06-03 19:28:07,526 INFO L125 PetriNetUnfolderBase]: For 172222/172228 co-relation queries the response was YES. [2024-06-03 19:28:07,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29500 conditions, 3830 events. 2538/3830 cut-off events. For 172222/172228 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18844 event pairs, 772 based on Foata normal form. 7/3832 useless extension candidates. Maximal degree in co-relation 29435. Up to 3403 conditions per place. [2024-06-03 19:28:07,555 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 149 selfloop transitions, 66 changer transitions 0/244 dead transitions. [2024-06-03 19:28:07,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 244 transitions, 3397 flow [2024-06-03 19:28:07,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:28:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:28:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-03 19:28:07,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-03 19:28:07,556 INFO L175 Difference]: Start difference. First operand has 147 places, 210 transitions, 2465 flow. Second operand 8 states and 163 transitions. [2024-06-03 19:28:07,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 244 transitions, 3397 flow [2024-06-03 19:28:07,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 244 transitions, 3199 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-03 19:28:07,650 INFO L231 Difference]: Finished difference. Result has 149 places, 218 transitions, 2596 flow [2024-06-03 19:28:07,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2596, PETRI_PLACES=149, PETRI_TRANSITIONS=218} [2024-06-03 19:28:07,650 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 104 predicate places. [2024-06-03 19:28:07,650 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 218 transitions, 2596 flow [2024-06-03 19:28:07,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:07,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:07,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:07,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:28:07,651 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:07,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:07,651 INFO L85 PathProgramCache]: Analyzing trace with hash -178607610, now seen corresponding path program 5 times [2024-06-03 19:28:07,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:07,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830704961] [2024-06-03 19:28:07,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:07,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:08,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:08,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830704961] [2024-06-03 19:28:08,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830704961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:08,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:08,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:28:08,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132279362] [2024-06-03 19:28:08,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:08,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:28:08,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:08,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:28:08,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:28:08,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:28:08,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 218 transitions, 2596 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-03 19:28:08,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:08,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:28:08,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:09,171 INFO L124 PetriNetUnfolderBase]: 2670/3971 cut-off events. [2024-06-03 19:28:09,171 INFO L125 PetriNetUnfolderBase]: For 184712/184718 co-relation queries the response was YES. [2024-06-03 19:28:09,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31333 conditions, 3971 events. 2670/3971 cut-off events. For 184712/184718 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 19109 event pairs, 771 based on Foata normal form. 7/3968 useless extension candidates. Maximal degree in co-relation 31267. Up to 3487 conditions per place. [2024-06-03 19:28:09,204 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 160 selfloop transitions, 85 changer transitions 0/249 dead transitions. [2024-06-03 19:28:09,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 249 transitions, 3573 flow [2024-06-03 19:28:09,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:28:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:28:09,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:28:09,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-03 19:28:09,206 INFO L175 Difference]: Start difference. First operand has 149 places, 218 transitions, 2596 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:28:09,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 249 transitions, 3573 flow [2024-06-03 19:28:09,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 249 transitions, 3414 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-03 19:28:09,374 INFO L231 Difference]: Finished difference. Result has 153 places, 222 transitions, 2712 flow [2024-06-03 19:28:09,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2437, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2712, PETRI_PLACES=153, PETRI_TRANSITIONS=222} [2024-06-03 19:28:09,375 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 108 predicate places. [2024-06-03 19:28:09,375 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 222 transitions, 2712 flow [2024-06-03 19:28:09,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-03 19:28:09,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:09,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:09,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:28:09,375 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:09,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:09,376 INFO L85 PathProgramCache]: Analyzing trace with hash -178600170, now seen corresponding path program 6 times [2024-06-03 19:28:09,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:09,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399980408] [2024-06-03 19:28:09,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:09,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:10,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:10,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399980408] [2024-06-03 19:28:10,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399980408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:10,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:10,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:28:10,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65414708] [2024-06-03 19:28:10,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:10,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:28:10,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:10,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:28:10,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:28:10,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:28:10,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 222 transitions, 2712 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-03 19:28:10,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:10,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:28:10,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:10,874 INFO L124 PetriNetUnfolderBase]: 2664/3963 cut-off events. [2024-06-03 19:28:10,874 INFO L125 PetriNetUnfolderBase]: For 192485/192491 co-relation queries the response was YES. [2024-06-03 19:28:10,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31698 conditions, 3963 events. 2664/3963 cut-off events. For 192485/192491 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 19055 event pairs, 771 based on Foata normal form. 7/3960 useless extension candidates. Maximal degree in co-relation 31630. Up to 3483 conditions per place. [2024-06-03 19:28:10,902 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 157 selfloop transitions, 86 changer transitions 0/247 dead transitions. [2024-06-03 19:28:10,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 247 transitions, 3472 flow [2024-06-03 19:28:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:28:10,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:28:10,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:28:10,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-03 19:28:10,903 INFO L175 Difference]: Start difference. First operand has 153 places, 222 transitions, 2712 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:28:10,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 247 transitions, 3472 flow [2024-06-03 19:28:11,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 247 transitions, 3114 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-03 19:28:11,082 INFO L231 Difference]: Finished difference. Result has 154 places, 222 transitions, 2535 flow [2024-06-03 19:28:11,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2354, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2535, PETRI_PLACES=154, PETRI_TRANSITIONS=222} [2024-06-03 19:28:11,083 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-03 19:28:11,083 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 222 transitions, 2535 flow [2024-06-03 19:28:11,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-03 19:28:11,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:11,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:11,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:28:11,083 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:11,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:11,084 INFO L85 PathProgramCache]: Analyzing trace with hash -141731839, now seen corresponding path program 4 times [2024-06-03 19:28:11,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:11,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079041362] [2024-06-03 19:28:11,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:11,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:12,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:12,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079041362] [2024-06-03 19:28:12,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079041362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:12,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:12,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:28:12,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794247868] [2024-06-03 19:28:12,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:12,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:28:12,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:12,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:28:12,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:28:12,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:28:12,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 222 transitions, 2535 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:12,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:12,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:28:12,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:12,867 INFO L124 PetriNetUnfolderBase]: 2544/3840 cut-off events. [2024-06-03 19:28:12,867 INFO L125 PetriNetUnfolderBase]: For 196666/196672 co-relation queries the response was YES. [2024-06-03 19:28:12,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30454 conditions, 3840 events. 2544/3840 cut-off events. For 196666/196672 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18930 event pairs, 770 based on Foata normal form. 7/3842 useless extension candidates. Maximal degree in co-relation 30387. Up to 3462 conditions per place. [2024-06-03 19:28:12,894 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 169 selfloop transitions, 48 changer transitions 0/247 dead transitions. [2024-06-03 19:28:12,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 247 transitions, 3249 flow [2024-06-03 19:28:12,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:12,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:12,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 19:28:12,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-03 19:28:12,895 INFO L175 Difference]: Start difference. First operand has 154 places, 222 transitions, 2535 flow. Second operand 9 states and 173 transitions. [2024-06-03 19:28:12,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 247 transitions, 3249 flow [2024-06-03 19:28:13,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 247 transitions, 2942 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-03 19:28:13,094 INFO L231 Difference]: Finished difference. Result has 156 places, 222 transitions, 2333 flow [2024-06-03 19:28:13,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2228, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2333, PETRI_PLACES=156, PETRI_TRANSITIONS=222} [2024-06-03 19:28:13,095 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2024-06-03 19:28:13,095 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 222 transitions, 2333 flow [2024-06-03 19:28:13,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:13,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:13,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:13,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:28:13,095 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:13,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:13,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1071396041, now seen corresponding path program 1 times [2024-06-03 19:28:13,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:13,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147321461] [2024-06-03 19:28:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:13,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:13,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:13,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147321461] [2024-06-03 19:28:13,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147321461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:13,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:13,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:28:13,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744404139] [2024-06-03 19:28:13,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:13,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:28:13,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:13,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:28:13,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:28:13,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:28:13,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 222 transitions, 2333 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:13,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:13,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:28:13,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:14,612 INFO L124 PetriNetUnfolderBase]: 2254/3543 cut-off events. [2024-06-03 19:28:14,613 INFO L125 PetriNetUnfolderBase]: For 170006/170006 co-relation queries the response was YES. [2024-06-03 19:28:14,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27130 conditions, 3543 events. 2254/3543 cut-off events. For 170006/170006 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18091 event pairs, 655 based on Foata normal form. 2/3543 useless extension candidates. Maximal degree in co-relation 27063. Up to 3212 conditions per place. [2024-06-03 19:28:14,638 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 190 selfloop transitions, 13 changer transitions 0/234 dead transitions. [2024-06-03 19:28:14,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 234 transitions, 2797 flow [2024-06-03 19:28:14,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:28:14,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:28:14,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 19:28:14,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-03 19:28:14,639 INFO L175 Difference]: Start difference. First operand has 156 places, 222 transitions, 2333 flow. Second operand 7 states and 126 transitions. [2024-06-03 19:28:14,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 234 transitions, 2797 flow [2024-06-03 19:28:14,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 234 transitions, 2660 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-03 19:28:14,763 INFO L231 Difference]: Finished difference. Result has 155 places, 225 transitions, 2266 flow [2024-06-03 19:28:14,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2196, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2266, PETRI_PLACES=155, PETRI_TRANSITIONS=225} [2024-06-03 19:28:14,763 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 110 predicate places. [2024-06-03 19:28:14,763 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 225 transitions, 2266 flow [2024-06-03 19:28:14,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:14,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:14,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:14,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:28:14,764 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)] === [2024-06-03 19:28:14,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:14,764 INFO L85 PathProgramCache]: Analyzing trace with hash 392529269, now seen corresponding path program 1 times [2024-06-03 19:28:14,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:14,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086410597] [2024-06-03 19:28:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:14,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:15,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:15,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086410597] [2024-06-03 19:28:15,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086410597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:15,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:15,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:15,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513307138] [2024-06-03 19:28:15,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:15,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:15,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:15,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:15,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:15,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:28:15,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 225 transitions, 2266 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:15,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:15,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:28:15,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:16,633 INFO L124 PetriNetUnfolderBase]: 2500/3790 cut-off events. [2024-06-03 19:28:16,634 INFO L125 PetriNetUnfolderBase]: For 207524/207528 co-relation queries the response was YES. [2024-06-03 19:28:16,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30394 conditions, 3790 events. 2500/3790 cut-off events. For 207524/207528 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18675 event pairs, 683 based on Foata normal form. 6/3794 useless extension candidates. Maximal degree in co-relation 30326. Up to 3428 conditions per place. [2024-06-03 19:28:16,667 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 190 selfloop transitions, 44 changer transitions 0/264 dead transitions. [2024-06-03 19:28:16,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 264 transitions, 2948 flow [2024-06-03 19:28:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:16,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-03 19:28:16,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-03 19:28:16,668 INFO L175 Difference]: Start difference. First operand has 155 places, 225 transitions, 2266 flow. Second operand 9 states and 178 transitions. [2024-06-03 19:28:16,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 264 transitions, 2948 flow [2024-06-03 19:28:16,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 264 transitions, 2900 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 19:28:16,824 INFO L231 Difference]: Finished difference. Result has 159 places, 228 transitions, 2412 flow [2024-06-03 19:28:16,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2218, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2412, PETRI_PLACES=159, PETRI_TRANSITIONS=228} [2024-06-03 19:28:16,825 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 114 predicate places. [2024-06-03 19:28:16,825 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 228 transitions, 2412 flow [2024-06-03 19:28:16,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:16,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:16,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:16,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:28:16,826 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)] === [2024-06-03 19:28:16,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:16,826 INFO L85 PathProgramCache]: Analyzing trace with hash 392649425, now seen corresponding path program 1 times [2024-06-03 19:28:16,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:16,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728356055] [2024-06-03 19:28:16,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:16,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:17,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:17,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728356055] [2024-06-03 19:28:17,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728356055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:17,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:17,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:17,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570156901] [2024-06-03 19:28:17,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:17,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:17,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:17,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:17,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:17,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:28:17,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 228 transitions, 2412 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:17,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:17,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:28:17,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:18,584 INFO L124 PetriNetUnfolderBase]: 2712/4033 cut-off events. [2024-06-03 19:28:18,584 INFO L125 PetriNetUnfolderBase]: For 227626/227628 co-relation queries the response was YES. [2024-06-03 19:28:18,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32842 conditions, 4033 events. 2712/4033 cut-off events. For 227626/227628 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 19532 event pairs, 708 based on Foata normal form. 8/4039 useless extension candidates. Maximal degree in co-relation 32773. Up to 3768 conditions per place. [2024-06-03 19:28:18,612 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 225 selfloop transitions, 49 changer transitions 0/278 dead transitions. [2024-06-03 19:28:18,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 278 transitions, 3582 flow [2024-06-03 19:28:18,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:18,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:18,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-03 19:28:18,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-03 19:28:18,613 INFO L175 Difference]: Start difference. First operand has 159 places, 228 transitions, 2412 flow. Second operand 9 states and 180 transitions. [2024-06-03 19:28:18,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 278 transitions, 3582 flow [2024-06-03 19:28:18,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 278 transitions, 3412 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-03 19:28:18,764 INFO L231 Difference]: Finished difference. Result has 163 places, 239 transitions, 2592 flow [2024-06-03 19:28:18,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2592, PETRI_PLACES=163, PETRI_TRANSITIONS=239} [2024-06-03 19:28:18,765 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 118 predicate places. [2024-06-03 19:28:18,765 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 239 transitions, 2592 flow [2024-06-03 19:28:18,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:18,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:18,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:18,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:28:18,765 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:18,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:18,766 INFO L85 PathProgramCache]: Analyzing trace with hash 397297813, now seen corresponding path program 1 times [2024-06-03 19:28:18,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:18,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047485669] [2024-06-03 19:28:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:18,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:19,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:19,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047485669] [2024-06-03 19:28:19,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047485669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:19,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:19,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:19,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938387277] [2024-06-03 19:28:19,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:19,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:19,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:19,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:19,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:19,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:28:19,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 239 transitions, 2592 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:19,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:19,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:28:19,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:20,531 INFO L124 PetriNetUnfolderBase]: 2730/4059 cut-off events. [2024-06-03 19:28:20,531 INFO L125 PetriNetUnfolderBase]: For 243525/243527 co-relation queries the response was YES. [2024-06-03 19:28:20,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34249 conditions, 4059 events. 2730/4059 cut-off events. For 243525/243527 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 19640 event pairs, 696 based on Foata normal form. 5/4062 useless extension candidates. Maximal degree in co-relation 34177. Up to 3806 conditions per place. [2024-06-03 19:28:20,565 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 214 selfloop transitions, 58 changer transitions 0/276 dead transitions. [2024-06-03 19:28:20,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 276 transitions, 3568 flow [2024-06-03 19:28:20,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 19:28:20,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-03 19:28:20,566 INFO L175 Difference]: Start difference. First operand has 163 places, 239 transitions, 2592 flow. Second operand 9 states and 174 transitions. [2024-06-03 19:28:20,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 276 transitions, 3568 flow [2024-06-03 19:28:20,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 276 transitions, 3403 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-03 19:28:20,758 INFO L231 Difference]: Finished difference. Result has 168 places, 243 transitions, 2662 flow [2024-06-03 19:28:20,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2662, PETRI_PLACES=168, PETRI_TRANSITIONS=243} [2024-06-03 19:28:20,758 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 123 predicate places. [2024-06-03 19:28:20,758 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 243 transitions, 2662 flow [2024-06-03 19:28:20,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:20,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:20,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:20,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:28:20,758 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)] === [2024-06-03 19:28:20,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:20,759 INFO L85 PathProgramCache]: Analyzing trace with hash 397297565, now seen corresponding path program 2 times [2024-06-03 19:28:20,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:20,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56781241] [2024-06-03 19:28:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:20,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:21,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:21,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56781241] [2024-06-03 19:28:21,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56781241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:21,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:21,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:21,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604372072] [2024-06-03 19:28:21,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:21,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:21,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:21,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:21,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:21,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:28:21,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 243 transitions, 2662 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:21,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:21,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:28:21,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:22,352 INFO L124 PetriNetUnfolderBase]: 2846/4226 cut-off events. [2024-06-03 19:28:22,352 INFO L125 PetriNetUnfolderBase]: For 265683/265685 co-relation queries the response was YES. [2024-06-03 19:28:22,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36399 conditions, 4226 events. 2846/4226 cut-off events. For 265683/265685 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 20549 event pairs, 691 based on Foata normal form. 8/4232 useless extension candidates. Maximal degree in co-relation 36325. Up to 3724 conditions per place. [2024-06-03 19:28:22,389 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 222 selfloop transitions, 68 changer transitions 0/294 dead transitions. [2024-06-03 19:28:22,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 294 transitions, 4040 flow [2024-06-03 19:28:22,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:22,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:22,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-03 19:28:22,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-03 19:28:22,390 INFO L175 Difference]: Start difference. First operand has 168 places, 243 transitions, 2662 flow. Second operand 9 states and 182 transitions. [2024-06-03 19:28:22,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 294 transitions, 4040 flow [2024-06-03 19:28:22,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 294 transitions, 3835 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-03 19:28:22,594 INFO L231 Difference]: Finished difference. Result has 171 places, 255 transitions, 2940 flow [2024-06-03 19:28:22,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2457, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2940, PETRI_PLACES=171, PETRI_TRANSITIONS=255} [2024-06-03 19:28:22,594 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 126 predicate places. [2024-06-03 19:28:22,594 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 255 transitions, 2940 flow [2024-06-03 19:28:22,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:22,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:22,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:22,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:28:22,595 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)] === [2024-06-03 19:28:22,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:22,595 INFO L85 PathProgramCache]: Analyzing trace with hash 397291055, now seen corresponding path program 3 times [2024-06-03 19:28:22,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:22,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559934501] [2024-06-03 19:28:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:22,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:23,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:23,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559934501] [2024-06-03 19:28:23,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559934501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:23,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:23,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:23,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627033563] [2024-06-03 19:28:23,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:23,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:23,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:23,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:23,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:23,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:28:23,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 255 transitions, 2940 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:23,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:23,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:28:23,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:24,302 INFO L124 PetriNetUnfolderBase]: 2834/4210 cut-off events. [2024-06-03 19:28:24,302 INFO L125 PetriNetUnfolderBase]: For 278085/278087 co-relation queries the response was YES. [2024-06-03 19:28:24,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37076 conditions, 4210 events. 2834/4210 cut-off events. For 278085/278087 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 20466 event pairs, 699 based on Foata normal form. 8/4216 useless extension candidates. Maximal degree in co-relation 37000. Up to 3718 conditions per place. [2024-06-03 19:28:24,339 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 226 selfloop transitions, 63 changer transitions 0/293 dead transitions. [2024-06-03 19:28:24,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 293 transitions, 3956 flow [2024-06-03 19:28:24,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:24,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-03 19:28:24,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-03 19:28:24,340 INFO L175 Difference]: Start difference. First operand has 171 places, 255 transitions, 2940 flow. Second operand 9 states and 181 transitions. [2024-06-03 19:28:24,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 293 transitions, 3956 flow [2024-06-03 19:28:24,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 293 transitions, 3714 flow, removed 101 selfloop flow, removed 4 redundant places. [2024-06-03 19:28:24,664 INFO L231 Difference]: Finished difference. Result has 176 places, 255 transitions, 2834 flow [2024-06-03 19:28:24,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2698, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2834, PETRI_PLACES=176, PETRI_TRANSITIONS=255} [2024-06-03 19:28:24,665 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 131 predicate places. [2024-06-03 19:28:24,665 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 255 transitions, 2834 flow [2024-06-03 19:28:24,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:24,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:24,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:24,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:28:24,665 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)] === [2024-06-03 19:28:24,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:24,666 INFO L85 PathProgramCache]: Analyzing trace with hash 569787455, now seen corresponding path program 4 times [2024-06-03 19:28:24,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:24,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397077895] [2024-06-03 19:28:24,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:24,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:25,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:25,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397077895] [2024-06-03 19:28:25,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397077895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:25,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:25,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:25,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176650641] [2024-06-03 19:28:25,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:25,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:25,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:25,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:25,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:25,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:28:25,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 255 transitions, 2834 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:25,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:25,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:28:25,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:26,415 INFO L124 PetriNetUnfolderBase]: 2982/4436 cut-off events. [2024-06-03 19:28:26,415 INFO L125 PetriNetUnfolderBase]: For 301373/301373 co-relation queries the response was YES. [2024-06-03 19:28:26,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38930 conditions, 4436 events. 2982/4436 cut-off events. For 301373/301373 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 21861 event pairs, 709 based on Foata normal form. 6/4440 useless extension candidates. Maximal degree in co-relation 38852. Up to 3683 conditions per place. [2024-06-03 19:28:26,455 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 225 selfloop transitions, 78 changer transitions 0/307 dead transitions. [2024-06-03 19:28:26,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 307 transitions, 4400 flow [2024-06-03 19:28:26,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:26,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:26,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-03 19:28:26,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-03 19:28:26,456 INFO L175 Difference]: Start difference. First operand has 176 places, 255 transitions, 2834 flow. Second operand 9 states and 185 transitions. [2024-06-03 19:28:26,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 307 transitions, 4400 flow [2024-06-03 19:28:26,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 307 transitions, 4207 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-03 19:28:26,704 INFO L231 Difference]: Finished difference. Result has 178 places, 267 transitions, 3146 flow [2024-06-03 19:28:26,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2641, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3146, PETRI_PLACES=178, PETRI_TRANSITIONS=267} [2024-06-03 19:28:26,705 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 133 predicate places. [2024-06-03 19:28:26,705 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 267 transitions, 3146 flow [2024-06-03 19:28:26,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:26,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:26,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:26,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:28:26,705 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)] === [2024-06-03 19:28:26,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:26,706 INFO L85 PathProgramCache]: Analyzing trace with hash -386964083, now seen corresponding path program 2 times [2024-06-03 19:28:26,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:26,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439792040] [2024-06-03 19:28:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:26,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:27,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:27,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439792040] [2024-06-03 19:28:27,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439792040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:27,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:27,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:27,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376298274] [2024-06-03 19:28:27,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:27,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:27,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:27,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:27,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:27,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:28:27,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 267 transitions, 3146 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:27,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:27,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:28:27,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:28,632 INFO L124 PetriNetUnfolderBase]: 3000/4460 cut-off events. [2024-06-03 19:28:28,632 INFO L125 PetriNetUnfolderBase]: For 319108/319108 co-relation queries the response was YES. [2024-06-03 19:28:28,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40200 conditions, 4460 events. 3000/4460 cut-off events. For 319108/319108 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 21937 event pairs, 730 based on Foata normal form. 3/4461 useless extension candidates. Maximal degree in co-relation 40121. Up to 4098 conditions per place. [2024-06-03 19:28:28,673 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 233 selfloop transitions, 65 changer transitions 0/302 dead transitions. [2024-06-03 19:28:28,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 302 transitions, 4208 flow [2024-06-03 19:28:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:28,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:28,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 19:28:28,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-03 19:28:28,674 INFO L175 Difference]: Start difference. First operand has 178 places, 267 transitions, 3146 flow. Second operand 9 states and 174 transitions. [2024-06-03 19:28:28,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 302 transitions, 4208 flow [2024-06-03 19:28:29,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 302 transitions, 4005 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-03 19:28:29,026 INFO L231 Difference]: Finished difference. Result has 183 places, 271 transitions, 3208 flow [2024-06-03 19:28:29,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2943, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3208, PETRI_PLACES=183, PETRI_TRANSITIONS=271} [2024-06-03 19:28:29,026 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 138 predicate places. [2024-06-03 19:28:29,027 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 271 transitions, 3208 flow [2024-06-03 19:28:29,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:29,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:29,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:29,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:28:29,028 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:29,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:29,028 INFO L85 PathProgramCache]: Analyzing trace with hash -386970841, now seen corresponding path program 5 times [2024-06-03 19:28:29,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:29,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501783618] [2024-06-03 19:28:29,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:29,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:29,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:29,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501783618] [2024-06-03 19:28:29,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501783618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:29,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:29,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:29,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097604798] [2024-06-03 19:28:29,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:29,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:29,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:29,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:29,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:29,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:28:29,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 271 transitions, 3208 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:29,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:29,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:28:29,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:30,709 INFO L124 PetriNetUnfolderBase]: 2988/4444 cut-off events. [2024-06-03 19:28:30,709 INFO L125 PetriNetUnfolderBase]: For 326423/326423 co-relation queries the response was YES. [2024-06-03 19:28:30,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40400 conditions, 4444 events. 2988/4444 cut-off events. For 326423/326423 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 21906 event pairs, 711 based on Foata normal form. 6/4448 useless extension candidates. Maximal degree in co-relation 40319. Up to 3703 conditions per place. [2024-06-03 19:28:30,750 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 228 selfloop transitions, 77 changer transitions 0/309 dead transitions. [2024-06-03 19:28:30,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 309 transitions, 4424 flow [2024-06-03 19:28:30,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:30,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-03 19:28:30,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-03 19:28:30,751 INFO L175 Difference]: Start difference. First operand has 183 places, 271 transitions, 3208 flow. Second operand 9 states and 182 transitions. [2024-06-03 19:28:30,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 309 transitions, 4424 flow [2024-06-03 19:28:31,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 309 transitions, 4130 flow, removed 91 selfloop flow, removed 6 redundant places. [2024-06-03 19:28:31,105 INFO L231 Difference]: Finished difference. Result has 186 places, 271 transitions, 3078 flow [2024-06-03 19:28:31,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2914, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3078, PETRI_PLACES=186, PETRI_TRANSITIONS=271} [2024-06-03 19:28:31,106 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 141 predicate places. [2024-06-03 19:28:31,106 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 271 transitions, 3078 flow [2024-06-03 19:28:31,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:31,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:31,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:31,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:28:31,106 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:31,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:31,107 INFO L85 PathProgramCache]: Analyzing trace with hash -386733691, now seen corresponding path program 6 times [2024-06-03 19:28:31,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:31,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890161818] [2024-06-03 19:28:31,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:31,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:31,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:31,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890161818] [2024-06-03 19:28:31,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890161818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:31,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:31,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:31,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043803655] [2024-06-03 19:28:31,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:31,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:31,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:31,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:31,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:31,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:28:31,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 271 transitions, 3078 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:31,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:31,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:28:31,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:32,840 INFO L124 PetriNetUnfolderBase]: 2992/4453 cut-off events. [2024-06-03 19:28:32,840 INFO L125 PetriNetUnfolderBase]: For 336350/336350 co-relation queries the response was YES. [2024-06-03 19:28:32,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40484 conditions, 4453 events. 2992/4453 cut-off events. For 336350/336350 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 21960 event pairs, 693 based on Foata normal form. 6/4457 useless extension candidates. Maximal degree in co-relation 40402. Up to 3712 conditions per place. [2024-06-03 19:28:32,880 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 206 selfloop transitions, 99 changer transitions 0/309 dead transitions. [2024-06-03 19:28:32,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 309 transitions, 4103 flow [2024-06-03 19:28:32,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:32,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:32,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-03 19:28:32,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-03 19:28:32,881 INFO L175 Difference]: Start difference. First operand has 186 places, 271 transitions, 3078 flow. Second operand 9 states and 179 transitions. [2024-06-03 19:28:32,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 309 transitions, 4103 flow [2024-06-03 19:28:33,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 309 transitions, 3946 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 19:28:33,127 INFO L231 Difference]: Finished difference. Result has 188 places, 275 transitions, 3257 flow [2024-06-03 19:28:33,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2924, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3257, PETRI_PLACES=188, PETRI_TRANSITIONS=275} [2024-06-03 19:28:33,127 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 143 predicate places. [2024-06-03 19:28:33,127 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 275 transitions, 3257 flow [2024-06-03 19:28:33,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:33,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:33,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:33,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:28:33,128 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:33,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:33,128 INFO L85 PathProgramCache]: Analyzing trace with hash 570026713, now seen corresponding path program 3 times [2024-06-03 19:28:33,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:33,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587584402] [2024-06-03 19:28:33,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:33,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:34,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:34,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587584402] [2024-06-03 19:28:34,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587584402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:34,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:34,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:34,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080474976] [2024-06-03 19:28:34,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:34,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:34,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:34,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:34,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:34,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:28:34,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 275 transitions, 3257 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:34,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:34,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:28:34,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:35,095 INFO L124 PetriNetUnfolderBase]: 3010/4479 cut-off events. [2024-06-03 19:28:35,095 INFO L125 PetriNetUnfolderBase]: For 348604/348604 co-relation queries the response was YES. [2024-06-03 19:28:35,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41236 conditions, 4479 events. 3010/4479 cut-off events. For 348604/348604 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 22103 event pairs, 724 based on Foata normal form. 3/4480 useless extension candidates. Maximal degree in co-relation 41153. Up to 4067 conditions per place. [2024-06-03 19:28:35,136 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 222 selfloop transitions, 87 changer transitions 0/313 dead transitions. [2024-06-03 19:28:35,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 313 transitions, 4293 flow [2024-06-03 19:28:35,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:28:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:28:35,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-03 19:28:35,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2024-06-03 19:28:35,138 INFO L175 Difference]: Start difference. First operand has 188 places, 275 transitions, 3257 flow. Second operand 10 states and 191 transitions. [2024-06-03 19:28:35,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 313 transitions, 4293 flow [2024-06-03 19:28:35,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 313 transitions, 4054 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-03 19:28:35,487 INFO L231 Difference]: Finished difference. Result has 192 places, 279 transitions, 3338 flow [2024-06-03 19:28:35,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3018, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3338, PETRI_PLACES=192, PETRI_TRANSITIONS=279} [2024-06-03 19:28:35,488 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 147 predicate places. [2024-06-03 19:28:35,488 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 279 transitions, 3338 flow [2024-06-03 19:28:35,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:35,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:35,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:35,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:28:35,489 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:35,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:35,489 INFO L85 PathProgramCache]: Analyzing trace with hash 570027023, now seen corresponding path program 1 times [2024-06-03 19:28:35,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:35,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356277549] [2024-06-03 19:28:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:35,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:36,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:36,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356277549] [2024-06-03 19:28:36,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356277549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:36,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:36,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:36,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228981953] [2024-06-03 19:28:36,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:36,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:36,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:36,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:36,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:36,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:28:36,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 279 transitions, 3338 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:36,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:36,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:28:36,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:37,444 INFO L124 PetriNetUnfolderBase]: 2912/4397 cut-off events. [2024-06-03 19:28:37,445 INFO L125 PetriNetUnfolderBase]: For 366363/366365 co-relation queries the response was YES. [2024-06-03 19:28:37,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40787 conditions, 4397 events. 2912/4397 cut-off events. For 366363/366365 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 22319 event pairs, 729 based on Foata normal form. 8/4403 useless extension candidates. Maximal degree in co-relation 40703. Up to 4023 conditions per place. [2024-06-03 19:28:37,489 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 245 selfloop transitions, 35 changer transitions 0/313 dead transitions. [2024-06-03 19:28:37,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 313 transitions, 4296 flow [2024-06-03 19:28:37,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:37,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:37,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-03 19:28:37,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-03 19:28:37,491 INFO L175 Difference]: Start difference. First operand has 192 places, 279 transitions, 3338 flow. Second operand 9 states and 178 transitions. [2024-06-03 19:28:37,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 313 transitions, 4296 flow [2024-06-03 19:28:37,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 313 transitions, 4031 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-03 19:28:37,841 INFO L231 Difference]: Finished difference. Result has 194 places, 282 transitions, 3273 flow [2024-06-03 19:28:37,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3073, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3273, PETRI_PLACES=194, PETRI_TRANSITIONS=282} [2024-06-03 19:28:37,841 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 149 predicate places. [2024-06-03 19:28:37,841 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 282 transitions, 3273 flow [2024-06-03 19:28:37,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:37,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:37,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:37,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 19:28:37,842 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:37,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:37,842 INFO L85 PathProgramCache]: Analyzing trace with hash 585743472, now seen corresponding path program 1 times [2024-06-03 19:28:37,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:37,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790501364] [2024-06-03 19:28:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:37,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:38,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:38,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790501364] [2024-06-03 19:28:38,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790501364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:38,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:38,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:28:38,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039653882] [2024-06-03 19:28:38,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:38,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:28:38,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:38,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:28:38,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:28:38,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:28:38,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 282 transitions, 3273 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-03 19:28:38,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:38,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:28:38,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:39,551 INFO L124 PetriNetUnfolderBase]: 2925/4415 cut-off events. [2024-06-03 19:28:39,551 INFO L125 PetriNetUnfolderBase]: For 374322/374325 co-relation queries the response was YES. [2024-06-03 19:28:39,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41199 conditions, 4415 events. 2925/4415 cut-off events. For 374322/374325 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 22389 event pairs, 739 based on Foata normal form. 3/4415 useless extension candidates. Maximal degree in co-relation 41114. Up to 4118 conditions per place. [2024-06-03 19:28:39,591 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 241 selfloop transitions, 27 changer transitions 0/301 dead transitions. [2024-06-03 19:28:39,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 301 transitions, 4143 flow [2024-06-03 19:28:39,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:28:39,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:28:39,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 19:28:39,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41883116883116883 [2024-06-03 19:28:39,592 INFO L175 Difference]: Start difference. First operand has 194 places, 282 transitions, 3273 flow. Second operand 7 states and 129 transitions. [2024-06-03 19:28:39,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 301 transitions, 4143 flow [2024-06-03 19:28:39,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 301 transitions, 3968 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-03 19:28:39,949 INFO L231 Difference]: Finished difference. Result has 195 places, 288 transitions, 3271 flow [2024-06-03 19:28:39,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3108, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3271, PETRI_PLACES=195, PETRI_TRANSITIONS=288} [2024-06-03 19:28:39,950 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 150 predicate places. [2024-06-03 19:28:39,950 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 288 transitions, 3271 flow [2024-06-03 19:28:39,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-03 19:28:39,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:39,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:39,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 19:28:39,951 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:39,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:39,951 INFO L85 PathProgramCache]: Analyzing trace with hash -956537127, now seen corresponding path program 4 times [2024-06-03 19:28:39,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:39,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576143804] [2024-06-03 19:28:39,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:39,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:40,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:40,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:40,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576143804] [2024-06-03 19:28:40,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576143804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:40,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:40,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:40,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26421140] [2024-06-03 19:28:40,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:40,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:40,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:40,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:40,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:41,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:28:41,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 288 transitions, 3271 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:41,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:41,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:28:41,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:41,899 INFO L124 PetriNetUnfolderBase]: 3069/4569 cut-off events. [2024-06-03 19:28:41,900 INFO L125 PetriNetUnfolderBase]: For 389903/389906 co-relation queries the response was YES. [2024-06-03 19:28:41,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42658 conditions, 4569 events. 3069/4569 cut-off events. For 389903/389906 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 22705 event pairs, 714 based on Foata normal form. 5/4564 useless extension candidates. Maximal degree in co-relation 42572. Up to 4040 conditions per place. [2024-06-03 19:28:41,942 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 204 selfloop transitions, 112 changer transitions 0/320 dead transitions. [2024-06-03 19:28:41,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 320 transitions, 4325 flow [2024-06-03 19:28:41,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:41,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:41,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 19:28:41,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-03 19:28:41,943 INFO L175 Difference]: Start difference. First operand has 195 places, 288 transitions, 3271 flow. Second operand 9 states and 173 transitions. [2024-06-03 19:28:41,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 320 transitions, 4325 flow [2024-06-03 19:28:42,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 320 transitions, 4252 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 19:28:42,392 INFO L231 Difference]: Finished difference. Result has 199 places, 292 transitions, 3579 flow [2024-06-03 19:28:42,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3198, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3579, PETRI_PLACES=199, PETRI_TRANSITIONS=292} [2024-06-03 19:28:42,393 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 154 predicate places. [2024-06-03 19:28:42,393 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 292 transitions, 3579 flow [2024-06-03 19:28:42,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:42,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:42,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:42,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 19:28:42,393 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:42,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:42,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1778106177, now seen corresponding path program 7 times [2024-06-03 19:28:42,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:42,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274711087] [2024-06-03 19:28:42,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:42,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:43,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:43,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274711087] [2024-06-03 19:28:43,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274711087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:43,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:43,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:43,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550079029] [2024-06-03 19:28:43,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:43,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:43,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:43,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:43,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:43,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:28:43,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 292 transitions, 3579 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:43,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:43,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:28:43,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:44,284 INFO L124 PetriNetUnfolderBase]: 3153/4703 cut-off events. [2024-06-03 19:28:44,285 INFO L125 PetriNetUnfolderBase]: For 423402/423405 co-relation queries the response was YES. [2024-06-03 19:28:44,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45303 conditions, 4703 events. 3153/4703 cut-off events. For 423402/423405 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 23603 event pairs, 686 based on Foata normal form. 8/4700 useless extension candidates. Maximal degree in co-relation 45217. Up to 3647 conditions per place. [2024-06-03 19:28:44,327 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 189 selfloop transitions, 145 changer transitions 0/338 dead transitions. [2024-06-03 19:28:44,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 338 transitions, 5109 flow [2024-06-03 19:28:44,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-03 19:28:44,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-03 19:28:44,328 INFO L175 Difference]: Start difference. First operand has 199 places, 292 transitions, 3579 flow. Second operand 9 states and 181 transitions. [2024-06-03 19:28:44,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 338 transitions, 5109 flow [2024-06-03 19:28:44,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 338 transitions, 4758 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-03 19:28:44,759 INFO L231 Difference]: Finished difference. Result has 202 places, 304 transitions, 3995 flow [2024-06-03 19:28:44,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3228, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3995, PETRI_PLACES=202, PETRI_TRANSITIONS=304} [2024-06-03 19:28:44,759 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 157 predicate places. [2024-06-03 19:28:44,759 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 304 transitions, 3995 flow [2024-06-03 19:28:44,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:44,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:44,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:44,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 19:28:44,760 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)] === [2024-06-03 19:28:44,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:44,760 INFO L85 PathProgramCache]: Analyzing trace with hash -946052927, now seen corresponding path program 2 times [2024-06-03 19:28:44,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:44,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067219897] [2024-06-03 19:28:44,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:44,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:45,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:45,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067219897] [2024-06-03 19:28:45,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067219897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:45,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:45,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:45,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555716337] [2024-06-03 19:28:45,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:45,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:45,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:45,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:45,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:45,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:28:45,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 304 transitions, 3995 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:45,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:45,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:28:45,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:46,814 INFO L124 PetriNetUnfolderBase]: 3063/4632 cut-off events. [2024-06-03 19:28:46,814 INFO L125 PetriNetUnfolderBase]: For 444748/444754 co-relation queries the response was YES. [2024-06-03 19:28:46,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46016 conditions, 4632 events. 3063/4632 cut-off events. For 444748/444754 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 23844 event pairs, 701 based on Foata normal form. 10/4637 useless extension candidates. Maximal degree in co-relation 45928. Up to 3983 conditions per place. [2024-06-03 19:28:46,861 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 225 selfloop transitions, 83 changer transitions 0/342 dead transitions. [2024-06-03 19:28:46,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 342 transitions, 5359 flow [2024-06-03 19:28:46,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:46,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-03 19:28:46,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-03 19:28:46,862 INFO L175 Difference]: Start difference. First operand has 202 places, 304 transitions, 3995 flow. Second operand 9 states and 182 transitions. [2024-06-03 19:28:46,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 342 transitions, 5359 flow [2024-06-03 19:28:47,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 342 transitions, 5153 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-03 19:28:47,351 INFO L231 Difference]: Finished difference. Result has 207 places, 310 transitions, 4229 flow [2024-06-03 19:28:47,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3805, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4229, PETRI_PLACES=207, PETRI_TRANSITIONS=310} [2024-06-03 19:28:47,352 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 162 predicate places. [2024-06-03 19:28:47,352 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 310 transitions, 4229 flow [2024-06-03 19:28:47,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:47,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:47,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:47,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 19:28:47,352 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)] === [2024-06-03 19:28:47,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:47,352 INFO L85 PathProgramCache]: Analyzing trace with hash -956528447, now seen corresponding path program 3 times [2024-06-03 19:28:47,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:47,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747773623] [2024-06-03 19:28:47,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:47,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:48,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:48,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747773623] [2024-06-03 19:28:48,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747773623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:48,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:48,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:48,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107098567] [2024-06-03 19:28:48,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:48,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:48,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:48,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:48,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:48,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:28:48,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 310 transitions, 4229 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:48,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:48,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:28:48,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:49,325 INFO L124 PetriNetUnfolderBase]: 3091/4676 cut-off events. [2024-06-03 19:28:49,325 INFO L125 PetriNetUnfolderBase]: For 453945/453951 co-relation queries the response was YES. [2024-06-03 19:28:49,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45965 conditions, 4676 events. 3091/4676 cut-off events. For 453945/453951 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 24099 event pairs, 745 based on Foata normal form. 10/4681 useless extension candidates. Maximal degree in co-relation 45875. Up to 4189 conditions per place. [2024-06-03 19:28:49,373 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 248 selfloop transitions, 60 changer transitions 0/342 dead transitions. [2024-06-03 19:28:49,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 342 transitions, 5269 flow [2024-06-03 19:28:49,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:49,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:49,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-03 19:28:49,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-03 19:28:49,374 INFO L175 Difference]: Start difference. First operand has 207 places, 310 transitions, 4229 flow. Second operand 9 states and 178 transitions. [2024-06-03 19:28:49,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 342 transitions, 5269 flow [2024-06-03 19:28:49,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 342 transitions, 5011 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-03 19:28:49,898 INFO L231 Difference]: Finished difference. Result has 211 places, 313 transitions, 4233 flow [2024-06-03 19:28:49,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3995, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4233, PETRI_PLACES=211, PETRI_TRANSITIONS=313} [2024-06-03 19:28:49,898 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 166 predicate places. [2024-06-03 19:28:49,898 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 313 transitions, 4233 flow [2024-06-03 19:28:49,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:49,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:49,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:49,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 19:28:49,899 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)] === [2024-06-03 19:28:49,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:49,899 INFO L85 PathProgramCache]: Analyzing trace with hash -956528757, now seen corresponding path program 5 times [2024-06-03 19:28:49,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:49,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945041934] [2024-06-03 19:28:49,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:49,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:50,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:50,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945041934] [2024-06-03 19:28:50,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945041934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:50,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:50,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:50,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340320068] [2024-06-03 19:28:50,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:50,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:50,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:50,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:50,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:50,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:28:50,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 313 transitions, 4233 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:50,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:50,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:28:50,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:51,885 INFO L124 PetriNetUnfolderBase]: 3240/4834 cut-off events. [2024-06-03 19:28:51,885 INFO L125 PetriNetUnfolderBase]: For 463519/463522 co-relation queries the response was YES. [2024-06-03 19:28:51,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47653 conditions, 4834 events. 3240/4834 cut-off events. For 463519/463522 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 24377 event pairs, 736 based on Foata normal form. 5/4829 useless extension candidates. Maximal degree in co-relation 47561. Up to 4266 conditions per place. [2024-06-03 19:28:51,934 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 225 selfloop transitions, 120 changer transitions 0/349 dead transitions. [2024-06-03 19:28:51,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 349 transitions, 5383 flow [2024-06-03 19:28:51,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:28:51,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:28:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 19:28:51,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-03 19:28:51,935 INFO L175 Difference]: Start difference. First operand has 211 places, 313 transitions, 4233 flow. Second operand 10 states and 190 transitions. [2024-06-03 19:28:51,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 349 transitions, 5383 flow [2024-06-03 19:28:52,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 349 transitions, 5203 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-03 19:28:52,589 INFO L231 Difference]: Finished difference. Result has 215 places, 317 transitions, 4463 flow [2024-06-03 19:28:52,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4053, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4463, PETRI_PLACES=215, PETRI_TRANSITIONS=317} [2024-06-03 19:28:52,590 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-03 19:28:52,590 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 317 transitions, 4463 flow [2024-06-03 19:28:52,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:52,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:52,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:52,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 19:28:52,590 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:28:52,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:52,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1241636997, now seen corresponding path program 6 times [2024-06-03 19:28:52,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:52,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815092649] [2024-06-03 19:28:52,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:52,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:53,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:53,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:53,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815092649] [2024-06-03 19:28:53,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815092649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:53,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:53,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:53,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459442084] [2024-06-03 19:28:53,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:53,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:53,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:53,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:53,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:53,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:28:53,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 317 transitions, 4463 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:53,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:53,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:28:53,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:54,601 INFO L124 PetriNetUnfolderBase]: 3258/4855 cut-off events. [2024-06-03 19:28:54,601 INFO L125 PetriNetUnfolderBase]: For 483327/483330 co-relation queries the response was YES. [2024-06-03 19:28:54,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48816 conditions, 4855 events. 3258/4855 cut-off events. For 483327/483330 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 24450 event pairs, 740 based on Foata normal form. 5/4850 useless extension candidates. Maximal degree in co-relation 48723. Up to 4318 conditions per place. [2024-06-03 19:28:54,653 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 252 selfloop transitions, 94 changer transitions 0/350 dead transitions. [2024-06-03 19:28:54,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 350 transitions, 5719 flow [2024-06-03 19:28:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:28:54,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:28:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-03 19:28:54,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-03 19:28:54,654 INFO L175 Difference]: Start difference. First operand has 215 places, 317 transitions, 4463 flow. Second operand 9 states and 175 transitions. [2024-06-03 19:28:54,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 350 transitions, 5719 flow [2024-06-03 19:28:55,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 350 transitions, 5357 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-06-03 19:28:55,411 INFO L231 Difference]: Finished difference. Result has 216 places, 321 transitions, 4462 flow [2024-06-03 19:28:55,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4101, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4462, PETRI_PLACES=216, PETRI_TRANSITIONS=321} [2024-06-03 19:28:55,412 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 171 predicate places. [2024-06-03 19:28:55,413 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 321 transitions, 4462 flow [2024-06-03 19:28:55,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:55,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:55,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:55,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 19:28:55,413 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)] === [2024-06-03 19:28:55,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:55,414 INFO L85 PathProgramCache]: Analyzing trace with hash 196500185, now seen corresponding path program 7 times [2024-06-03 19:28:55,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:55,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070104695] [2024-06-03 19:28:55,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:55,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:56,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:56,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070104695] [2024-06-03 19:28:56,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070104695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:56,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:56,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:56,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110330586] [2024-06-03 19:28:56,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:56,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:56,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:56,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:56,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:56,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:28:56,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 321 transitions, 4462 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:56,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:56,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:28:56,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:28:57,496 INFO L124 PetriNetUnfolderBase]: 3284/4892 cut-off events. [2024-06-03 19:28:57,496 INFO L125 PetriNetUnfolderBase]: For 503974/503977 co-relation queries the response was YES. [2024-06-03 19:28:57,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49821 conditions, 4892 events. 3284/4892 cut-off events. For 503974/503977 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 24634 event pairs, 739 based on Foata normal form. 5/4887 useless extension candidates. Maximal degree in co-relation 49727. Up to 4180 conditions per place. [2024-06-03 19:28:57,548 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 205 selfloop transitions, 158 changer transitions 0/367 dead transitions. [2024-06-03 19:28:57,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 367 transitions, 6060 flow [2024-06-03 19:28:57,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:28:57,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:28:57,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-03 19:28:57,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359504132231405 [2024-06-03 19:28:57,549 INFO L175 Difference]: Start difference. First operand has 216 places, 321 transitions, 4462 flow. Second operand 11 states and 211 transitions. [2024-06-03 19:28:57,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 367 transitions, 6060 flow [2024-06-03 19:28:58,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 367 transitions, 5729 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-03 19:28:58,198 INFO L231 Difference]: Finished difference. Result has 220 places, 329 transitions, 4802 flow [2024-06-03 19:28:58,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4131, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4802, PETRI_PLACES=220, PETRI_TRANSITIONS=329} [2024-06-03 19:28:58,198 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 175 predicate places. [2024-06-03 19:28:58,198 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 329 transitions, 4802 flow [2024-06-03 19:28:58,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:58,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:28:58,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:28:58,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 19:28:58,199 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)] === [2024-06-03 19:28:58,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:28:58,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1233296447, now seen corresponding path program 4 times [2024-06-03 19:28:58,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:28:58,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085068981] [2024-06-03 19:28:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:28:58,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:28:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:28:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:28:59,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:28:59,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085068981] [2024-06-03 19:28:59,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085068981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:28:59,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:28:59,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:28:59,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060587137] [2024-06-03 19:28:59,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:28:59,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:28:59,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:28:59,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:28:59,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:28:59,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:28:59,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 329 transitions, 4802 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:28:59,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:28:59,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:28:59,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:00,455 INFO L124 PetriNetUnfolderBase]: 3181/4809 cut-off events. [2024-06-03 19:29:00,456 INFO L125 PetriNetUnfolderBase]: For 523032/523038 co-relation queries the response was YES. [2024-06-03 19:29:00,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49449 conditions, 4809 events. 3181/4809 cut-off events. For 523032/523038 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 24870 event pairs, 746 based on Foata normal form. 10/4814 useless extension candidates. Maximal degree in co-relation 49354. Up to 4217 conditions per place. [2024-06-03 19:29:00,509 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 248 selfloop transitions, 79 changer transitions 0/365 dead transitions. [2024-06-03 19:29:00,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 365 transitions, 5892 flow [2024-06-03 19:29:00,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:29:00,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:29:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-03 19:29:00,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-03 19:29:00,510 INFO L175 Difference]: Start difference. First operand has 220 places, 329 transitions, 4802 flow. Second operand 10 states and 197 transitions. [2024-06-03 19:29:00,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 365 transitions, 5892 flow [2024-06-03 19:29:01,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 365 transitions, 5569 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-03 19:29:01,223 INFO L231 Difference]: Finished difference. Result has 223 places, 332 transitions, 4765 flow [2024-06-03 19:29:01,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4479, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4765, PETRI_PLACES=223, PETRI_TRANSITIONS=332} [2024-06-03 19:29:01,224 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 178 predicate places. [2024-06-03 19:29:01,224 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 332 transitions, 4765 flow [2024-06-03 19:29:01,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:01,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:01,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:01,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 19:29:01,224 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)] === [2024-06-03 19:29:01,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:01,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1241628627, now seen corresponding path program 8 times [2024-06-03 19:29:01,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:01,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147281010] [2024-06-03 19:29:01,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:01,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:02,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:02,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147281010] [2024-06-03 19:29:02,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147281010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:02,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:02,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:29:02,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132054951] [2024-06-03 19:29:02,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:02,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:29:02,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:02,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:29:02,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:29:02,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:29:02,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 332 transitions, 4765 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:02,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:02,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:29:02,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:03,306 INFO L124 PetriNetUnfolderBase]: 3330/4967 cut-off events. [2024-06-03 19:29:03,306 INFO L125 PetriNetUnfolderBase]: For 540887/540890 co-relation queries the response was YES. [2024-06-03 19:29:03,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51717 conditions, 4967 events. 3330/4967 cut-off events. For 540887/540890 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 25172 event pairs, 735 based on Foata normal form. 5/4962 useless extension candidates. Maximal degree in co-relation 51620. Up to 4383 conditions per place. [2024-06-03 19:29:03,358 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 261 selfloop transitions, 106 changer transitions 0/371 dead transitions. [2024-06-03 19:29:03,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 371 transitions, 6309 flow [2024-06-03 19:29:03,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:29:03,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:29:03,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-03 19:29:03,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-03 19:29:03,359 INFO L175 Difference]: Start difference. First operand has 223 places, 332 transitions, 4765 flow. Second operand 10 states and 195 transitions. [2024-06-03 19:29:03,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 371 transitions, 6309 flow [2024-06-03 19:29:04,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 371 transitions, 6047 flow, removed 56 selfloop flow, removed 8 redundant places. [2024-06-03 19:29:04,040 INFO L231 Difference]: Finished difference. Result has 225 places, 336 transitions, 4891 flow [2024-06-03 19:29:04,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4513, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4891, PETRI_PLACES=225, PETRI_TRANSITIONS=336} [2024-06-03 19:29:04,040 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-06-03 19:29:04,041 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 336 transitions, 4891 flow [2024-06-03 19:29:04,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:04,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:04,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:04,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 19:29:04,041 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)] === [2024-06-03 19:29:04,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:04,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1241628317, now seen corresponding path program 5 times [2024-06-03 19:29:04,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:04,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637719037] [2024-06-03 19:29:04,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:04,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:05,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:05,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637719037] [2024-06-03 19:29:05,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637719037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:05,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:05,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:29:05,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942140798] [2024-06-03 19:29:05,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:05,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:29:05,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:05,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:29:05,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:29:05,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:29:05,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 336 transitions, 4891 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:05,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:05,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:29:05,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:06,081 INFO L124 PetriNetUnfolderBase]: 3189/4821 cut-off events. [2024-06-03 19:29:06,081 INFO L125 PetriNetUnfolderBase]: For 524048/524054 co-relation queries the response was YES. [2024-06-03 19:29:06,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49504 conditions, 4821 events. 3189/4821 cut-off events. For 524048/524054 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 24939 event pairs, 746 based on Foata normal form. 10/4826 useless extension candidates. Maximal degree in co-relation 49406. Up to 4299 conditions per place. [2024-06-03 19:29:06,134 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 272 selfloop transitions, 55 changer transitions 0/366 dead transitions. [2024-06-03 19:29:06,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 366 transitions, 5973 flow [2024-06-03 19:29:06,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:29:06,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:29:06,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-03 19:29:06,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-03 19:29:06,135 INFO L175 Difference]: Start difference. First operand has 225 places, 336 transitions, 4891 flow. Second operand 9 states and 179 transitions. [2024-06-03 19:29:06,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 366 transitions, 5973 flow [2024-06-03 19:29:07,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 366 transitions, 5529 flow, removed 105 selfloop flow, removed 8 redundant places. [2024-06-03 19:29:07,118 INFO L231 Difference]: Finished difference. Result has 226 places, 336 transitions, 4565 flow [2024-06-03 19:29:07,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4447, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4565, PETRI_PLACES=226, PETRI_TRANSITIONS=336} [2024-06-03 19:29:07,119 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-03 19:29:07,119 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 336 transitions, 4565 flow [2024-06-03 19:29:07,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:07,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:07,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:07,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 19:29:07,119 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)] === [2024-06-03 19:29:07,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:07,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1241637245, now seen corresponding path program 8 times [2024-06-03 19:29:07,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:07,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110269174] [2024-06-03 19:29:07,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:07,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:07,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:07,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110269174] [2024-06-03 19:29:07,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110269174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:07,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:07,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:29:07,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237424476] [2024-06-03 19:29:07,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:07,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:29:07,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:07,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:29:07,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:29:08,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:29:08,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 336 transitions, 4565 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:08,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:08,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:29:08,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:09,050 INFO L124 PetriNetUnfolderBase]: 3356/5009 cut-off events. [2024-06-03 19:29:09,051 INFO L125 PetriNetUnfolderBase]: For 545580/545583 co-relation queries the response was YES. [2024-06-03 19:29:09,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51260 conditions, 5009 events. 3356/5009 cut-off events. For 545580/545583 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 25410 event pairs, 717 based on Foata normal form. 8/5006 useless extension candidates. Maximal degree in co-relation 51161. Up to 3929 conditions per place. [2024-06-03 19:29:09,099 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 254 selfloop transitions, 118 changer transitions 0/376 dead transitions. [2024-06-03 19:29:09,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 376 transitions, 6128 flow [2024-06-03 19:29:09,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:29:09,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:29:09,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-03 19:29:09,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-03 19:29:09,100 INFO L175 Difference]: Start difference. First operand has 226 places, 336 transitions, 4565 flow. Second operand 9 states and 185 transitions. [2024-06-03 19:29:09,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 376 transitions, 6128 flow [2024-06-03 19:29:09,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 376 transitions, 5986 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-03 19:29:09,730 INFO L231 Difference]: Finished difference. Result has 227 places, 340 transitions, 4813 flow [2024-06-03 19:29:09,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4423, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4813, PETRI_PLACES=227, PETRI_TRANSITIONS=340} [2024-06-03 19:29:09,730 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-03 19:29:09,731 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 340 transitions, 4813 flow [2024-06-03 19:29:09,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:09,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:09,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:09,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 19:29:09,731 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)] === [2024-06-03 19:29:09,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:09,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1241874395, now seen corresponding path program 9 times [2024-06-03 19:29:09,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:09,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088717005] [2024-06-03 19:29:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:09,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:10,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:10,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088717005] [2024-06-03 19:29:10,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088717005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:10,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:10,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:29:10,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451409492] [2024-06-03 19:29:10,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:10,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:29:10,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:10,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:29:10,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:29:10,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:29:10,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 340 transitions, 4813 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:10,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:10,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:29:10,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:11,706 INFO L124 PetriNetUnfolderBase]: 3392/5069 cut-off events. [2024-06-03 19:29:11,707 INFO L125 PetriNetUnfolderBase]: For 568796/568799 co-relation queries the response was YES. [2024-06-03 19:29:11,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52564 conditions, 5069 events. 3392/5069 cut-off events. For 568796/568799 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 25808 event pairs, 719 based on Foata normal form. 8/5066 useless extension candidates. Maximal degree in co-relation 52464. Up to 3959 conditions per place. [2024-06-03 19:29:11,766 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 256 selfloop transitions, 120 changer transitions 0/380 dead transitions. [2024-06-03 19:29:11,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 380 transitions, 6514 flow [2024-06-03 19:29:11,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:29:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:29:11,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-03 19:29:11,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-03 19:29:11,767 INFO L175 Difference]: Start difference. First operand has 227 places, 340 transitions, 4813 flow. Second operand 9 states and 183 transitions. [2024-06-03 19:29:11,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 380 transitions, 6514 flow [2024-06-03 19:29:12,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 380 transitions, 5911 flow, removed 95 selfloop flow, removed 10 redundant places. [2024-06-03 19:29:12,422 INFO L231 Difference]: Finished difference. Result has 226 places, 344 transitions, 4615 flow [2024-06-03 19:29:12,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4237, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4615, PETRI_PLACES=226, PETRI_TRANSITIONS=344} [2024-06-03 19:29:12,423 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-03 19:29:12,423 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 344 transitions, 4615 flow [2024-06-03 19:29:12,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:12,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:12,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:12,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 19:29:12,423 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)] === [2024-06-03 19:29:12,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:12,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1241867637, now seen corresponding path program 9 times [2024-06-03 19:29:12,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:12,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886824156] [2024-06-03 19:29:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:12,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:13,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:13,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886824156] [2024-06-03 19:29:13,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886824156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:13,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:13,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:29:13,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164317557] [2024-06-03 19:29:13,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:13,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:29:13,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:13,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:29:13,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:29:13,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:29:13,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 344 transitions, 4615 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:13,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:13,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:29:13,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:14,637 INFO L124 PetriNetUnfolderBase]: 3386/5059 cut-off events. [2024-06-03 19:29:14,638 INFO L125 PetriNetUnfolderBase]: For 573003/573006 co-relation queries the response was YES. [2024-06-03 19:29:14,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51172 conditions, 5059 events. 3386/5059 cut-off events. For 573003/573006 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 25777 event pairs, 736 based on Foata normal form. 5/5054 useless extension candidates. Maximal degree in co-relation 51075. Up to 4507 conditions per place. [2024-06-03 19:29:14,684 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 277 selfloop transitions, 93 changer transitions 0/374 dead transitions. [2024-06-03 19:29:14,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 374 transitions, 5917 flow [2024-06-03 19:29:14,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:29:14,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:29:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-03 19:29:14,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-03 19:29:14,685 INFO L175 Difference]: Start difference. First operand has 226 places, 344 transitions, 4615 flow. Second operand 9 states and 175 transitions. [2024-06-03 19:29:14,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 374 transitions, 5917 flow [2024-06-03 19:29:15,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 374 transitions, 5403 flow, removed 118 selfloop flow, removed 7 redundant places. [2024-06-03 19:29:15,337 INFO L231 Difference]: Finished difference. Result has 228 places, 344 transitions, 4296 flow [2024-06-03 19:29:15,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4101, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4296, PETRI_PLACES=228, PETRI_TRANSITIONS=344} [2024-06-03 19:29:15,337 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 183 predicate places. [2024-06-03 19:29:15,337 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 344 transitions, 4296 flow [2024-06-03 19:29:15,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:15,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:15,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:15,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 19:29:15,338 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)] === [2024-06-03 19:29:15,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:15,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1241867885, now seen corresponding path program 10 times [2024-06-03 19:29:15,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:15,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657953119] [2024-06-03 19:29:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:15,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:16,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:16,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657953119] [2024-06-03 19:29:16,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657953119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:16,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:16,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:29:16,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656345470] [2024-06-03 19:29:16,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:16,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:29:16,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:16,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:29:16,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:29:16,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:29:16,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 344 transitions, 4296 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:16,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:16,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:29:16,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:17,182 INFO L124 PetriNetUnfolderBase]: 3374/5045 cut-off events. [2024-06-03 19:29:17,182 INFO L125 PetriNetUnfolderBase]: For 579571/579574 co-relation queries the response was YES. [2024-06-03 19:29:17,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50027 conditions, 5045 events. 3374/5045 cut-off events. For 579571/579574 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 25718 event pairs, 717 based on Foata normal form. 8/5042 useless extension candidates. Maximal degree in co-relation 49930. Up to 3945 conditions per place. [2024-06-03 19:29:17,237 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 255 selfloop transitions, 120 changer transitions 0/379 dead transitions. [2024-06-03 19:29:17,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 379 transitions, 5636 flow [2024-06-03 19:29:17,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:29:17,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:29:17,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-03 19:29:17,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-03 19:29:17,238 INFO L175 Difference]: Start difference. First operand has 228 places, 344 transitions, 4296 flow. Second operand 9 states and 183 transitions. [2024-06-03 19:29:17,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 379 transitions, 5636 flow [2024-06-03 19:29:18,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 379 transitions, 5343 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-03 19:29:18,299 INFO L231 Difference]: Finished difference. Result has 229 places, 344 transitions, 4252 flow [2024-06-03 19:29:18,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4003, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4252, PETRI_PLACES=229, PETRI_TRANSITIONS=344} [2024-06-03 19:29:18,299 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-03 19:29:18,299 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 344 transitions, 4252 flow [2024-06-03 19:29:18,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:18,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:18,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:18,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 19:29:18,300 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:29:18,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:18,300 INFO L85 PathProgramCache]: Analyzing trace with hash 621217392, now seen corresponding path program 2 times [2024-06-03 19:29:18,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:18,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520911405] [2024-06-03 19:29:18,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:18,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:19,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:19,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520911405] [2024-06-03 19:29:19,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520911405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:19,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:19,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:29:19,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375456265] [2024-06-03 19:29:19,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:19,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:29:19,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:19,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:29:19,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:29:19,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:29:19,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 344 transitions, 4252 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-03 19:29:19,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:19,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:29:19,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:20,043 INFO L124 PetriNetUnfolderBase]: 3234/4902 cut-off events. [2024-06-03 19:29:20,043 INFO L125 PetriNetUnfolderBase]: For 581438/581444 co-relation queries the response was YES. [2024-06-03 19:29:20,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48698 conditions, 4902 events. 3234/4902 cut-off events. For 581438/581444 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 25541 event pairs, 760 based on Foata normal form. 5/4902 useless extension candidates. Maximal degree in co-relation 48600. Up to 4540 conditions per place. [2024-06-03 19:29:20,097 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 286 selfloop transitions, 28 changer transitions 0/353 dead transitions. [2024-06-03 19:29:20,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 353 transitions, 5026 flow [2024-06-03 19:29:20,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:29:20,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:29:20,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 19:29:20,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39935064935064934 [2024-06-03 19:29:20,098 INFO L175 Difference]: Start difference. First operand has 229 places, 344 transitions, 4252 flow. Second operand 7 states and 123 transitions. [2024-06-03 19:29:20,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 353 transitions, 5026 flow [2024-06-03 19:29:20,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 353 transitions, 4759 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-03 19:29:20,764 INFO L231 Difference]: Finished difference. Result has 229 places, 344 transitions, 4047 flow [2024-06-03 19:29:20,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3985, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4047, PETRI_PLACES=229, PETRI_TRANSITIONS=344} [2024-06-03 19:29:20,765 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-03 19:29:20,765 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 344 transitions, 4047 flow [2024-06-03 19:29:20,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-03 19:29:20,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:20,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:20,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 19:29:20,765 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:29:20,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:20,766 INFO L85 PathProgramCache]: Analyzing trace with hash -501072024, now seen corresponding path program 3 times [2024-06-03 19:29:20,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:20,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178633343] [2024-06-03 19:29:20,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:20,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:21,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:21,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178633343] [2024-06-03 19:29:21,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178633343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:21,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:21,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:29:21,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964148858] [2024-06-03 19:29:21,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:21,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:29:21,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:21,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:29:21,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:29:21,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:29:21,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 344 transitions, 4047 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-03 19:29:21,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:21,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:29:21,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:22,296 INFO L124 PetriNetUnfolderBase]: 3236/4904 cut-off events. [2024-06-03 19:29:22,296 INFO L125 PetriNetUnfolderBase]: For 593837/593839 co-relation queries the response was YES. [2024-06-03 19:29:22,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48177 conditions, 4904 events. 3236/4904 cut-off events. For 593837/593839 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 25545 event pairs, 756 based on Foata normal form. 3/4905 useless extension candidates. Maximal degree in co-relation 48078. Up to 4543 conditions per place. [2024-06-03 19:29:22,348 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 294 selfloop transitions, 31 changer transitions 0/364 dead transitions. [2024-06-03 19:29:22,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 364 transitions, 4796 flow [2024-06-03 19:29:22,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:29:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:29:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-03 19:29:22,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-03 19:29:22,349 INFO L175 Difference]: Start difference. First operand has 229 places, 344 transitions, 4047 flow. Second operand 7 states and 134 transitions. [2024-06-03 19:29:22,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 364 transitions, 4796 flow [2024-06-03 19:29:23,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 364 transitions, 4730 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-03 19:29:23,051 INFO L231 Difference]: Finished difference. Result has 232 places, 347 transitions, 4098 flow [2024-06-03 19:29:23,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3984, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4098, PETRI_PLACES=232, PETRI_TRANSITIONS=347} [2024-06-03 19:29:23,051 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-03 19:29:23,051 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 347 transitions, 4098 flow [2024-06-03 19:29:23,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-03 19:29:23,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:23,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:23,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 19:29:23,052 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:29:23,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:23,052 INFO L85 PathProgramCache]: Analyzing trace with hash 53071174, now seen corresponding path program 1 times [2024-06-03 19:29:23,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:23,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341837778] [2024-06-03 19:29:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:23,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:23,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:23,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341837778] [2024-06-03 19:29:23,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341837778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:23,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:23,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:29:23,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142049872] [2024-06-03 19:29:23,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:23,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:29:23,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:23,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:29:23,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:29:23,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:29:23,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 347 transitions, 4098 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:23,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:23,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:29:23,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:24,518 INFO L124 PetriNetUnfolderBase]: 2955/4619 cut-off events. [2024-06-03 19:29:24,518 INFO L125 PetriNetUnfolderBase]: For 519502/519502 co-relation queries the response was YES. [2024-06-03 19:29:24,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43919 conditions, 4619 events. 2955/4619 cut-off events. For 519502/519502 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 24815 event pairs, 661 based on Foata normal form. 2/4619 useless extension candidates. Maximal degree in co-relation 43819. Up to 4145 conditions per place. [2024-06-03 19:29:24,568 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 302 selfloop transitions, 20 changer transitions 0/362 dead transitions. [2024-06-03 19:29:24,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 362 transitions, 4942 flow [2024-06-03 19:29:24,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:29:24,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:29:24,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-03 19:29:24,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-03 19:29:24,569 INFO L175 Difference]: Start difference. First operand has 232 places, 347 transitions, 4098 flow. Second operand 6 states and 121 transitions. [2024-06-03 19:29:24,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 362 transitions, 4942 flow [2024-06-03 19:29:25,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 362 transitions, 4839 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:29:25,203 INFO L231 Difference]: Finished difference. Result has 231 places, 350 transitions, 4083 flow [2024-06-03 19:29:25,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3995, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4083, PETRI_PLACES=231, PETRI_TRANSITIONS=350} [2024-06-03 19:29:25,204 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 186 predicate places. [2024-06-03 19:29:25,204 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 350 transitions, 4083 flow [2024-06-03 19:29:25,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:25,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:25,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:25,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 19:29:25,205 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:29:25,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:25,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1147377064, now seen corresponding path program 2 times [2024-06-03 19:29:25,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:25,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249694222] [2024-06-03 19:29:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:25,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:25,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:25,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249694222] [2024-06-03 19:29:25,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249694222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:25,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:25,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:29:25,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952638495] [2024-06-03 19:29:25,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:25,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:29:25,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:25,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:29:25,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:29:25,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:29:25,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 350 transitions, 4083 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:25,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:25,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:29:25,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:26,759 INFO L124 PetriNetUnfolderBase]: 2918/4561 cut-off events. [2024-06-03 19:29:26,760 INFO L125 PetriNetUnfolderBase]: For 529239/529239 co-relation queries the response was YES. [2024-06-03 19:29:26,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43744 conditions, 4561 events. 2918/4561 cut-off events. For 529239/529239 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 24455 event pairs, 659 based on Foata normal form. 1/4560 useless extension candidates. Maximal degree in co-relation 43644. Up to 4123 conditions per place. [2024-06-03 19:29:26,805 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 305 selfloop transitions, 13 changer transitions 0/358 dead transitions. [2024-06-03 19:29:26,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 358 transitions, 4743 flow [2024-06-03 19:29:26,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:29:26,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:29:26,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-03 19:29:26,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40584415584415584 [2024-06-03 19:29:26,806 INFO L175 Difference]: Start difference. First operand has 231 places, 350 transitions, 4083 flow. Second operand 7 states and 125 transitions. [2024-06-03 19:29:26,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 358 transitions, 4743 flow [2024-06-03 19:29:27,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 358 transitions, 4712 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:29:27,357 INFO L231 Difference]: Finished difference. Result has 235 places, 350 transitions, 4084 flow [2024-06-03 19:29:27,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4052, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4084, PETRI_PLACES=235, PETRI_TRANSITIONS=350} [2024-06-03 19:29:27,358 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 190 predicate places. [2024-06-03 19:29:27,358 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 350 transitions, 4084 flow [2024-06-03 19:29:27,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:27,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:27,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:27,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 19:29:27,358 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)] === [2024-06-03 19:29:27,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:27,359 INFO L85 PathProgramCache]: Analyzing trace with hash -712918683, now seen corresponding path program 1 times [2024-06-03 19:29:27,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:27,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409318928] [2024-06-03 19:29:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:27,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:28,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:28,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409318928] [2024-06-03 19:29:28,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409318928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:28,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:28,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:29:28,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543921117] [2024-06-03 19:29:28,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:28,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:29:28,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:28,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:29:28,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:29:28,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:29:28,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 350 transitions, 4084 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:28,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:28,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:29:28,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:29,685 INFO L124 PetriNetUnfolderBase]: 3340/4991 cut-off events. [2024-06-03 19:29:29,685 INFO L125 PetriNetUnfolderBase]: For 645625/645627 co-relation queries the response was YES. [2024-06-03 19:29:29,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50060 conditions, 4991 events. 3340/4991 cut-off events. For 645625/645627 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 25325 event pairs, 717 based on Foata normal form. 5/4994 useless extension candidates. Maximal degree in co-relation 49959. Up to 4696 conditions per place. [2024-06-03 19:29:29,735 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 338 selfloop transitions, 63 changer transitions 0/405 dead transitions. [2024-06-03 19:29:29,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 405 transitions, 5858 flow [2024-06-03 19:29:29,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:29:29,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:29:29,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-03 19:29:29,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-03 19:29:29,736 INFO L175 Difference]: Start difference. First operand has 235 places, 350 transitions, 4084 flow. Second operand 10 states and 198 transitions. [2024-06-03 19:29:29,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 405 transitions, 5858 flow [2024-06-03 19:29:30,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 405 transitions, 5807 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 19:29:30,550 INFO L231 Difference]: Finished difference. Result has 240 places, 361 transitions, 4513 flow [2024-06-03 19:29:30,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4033, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4513, PETRI_PLACES=240, PETRI_TRANSITIONS=361} [2024-06-03 19:29:30,550 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 195 predicate places. [2024-06-03 19:29:30,550 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 361 transitions, 4513 flow [2024-06-03 19:29:30,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:30,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:30,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:30,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 19:29:30,551 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)] === [2024-06-03 19:29:30,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:30,551 INFO L85 PathProgramCache]: Analyzing trace with hash -712768736, now seen corresponding path program 1 times [2024-06-03 19:29:30,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:30,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682807255] [2024-06-03 19:29:30,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:30,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:31,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:31,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682807255] [2024-06-03 19:29:31,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682807255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:31,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:31,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:29:31,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254808196] [2024-06-03 19:29:31,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:31,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:29:31,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:31,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:29:31,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:29:31,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:29:31,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 361 transitions, 4513 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:31,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:31,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:29:31,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:32,820 INFO L124 PetriNetUnfolderBase]: 3376/5043 cut-off events. [2024-06-03 19:29:32,820 INFO L125 PetriNetUnfolderBase]: For 681818/681820 co-relation queries the response was YES. [2024-06-03 19:29:32,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51858 conditions, 5043 events. 3376/5043 cut-off events. For 681818/681820 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 25616 event pairs, 689 based on Foata normal form. 8/5049 useless extension candidates. Maximal degree in co-relation 51754. Up to 4700 conditions per place. [2024-06-03 19:29:32,872 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 341 selfloop transitions, 63 changer transitions 0/408 dead transitions. [2024-06-03 19:29:32,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 408 transitions, 6021 flow [2024-06-03 19:29:32,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:29:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:29:32,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-03 19:29:32,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-03 19:29:32,874 INFO L175 Difference]: Start difference. First operand has 240 places, 361 transitions, 4513 flow. Second operand 10 states and 197 transitions. [2024-06-03 19:29:32,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 408 transitions, 6021 flow [2024-06-03 19:29:34,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 408 transitions, 5761 flow, removed 96 selfloop flow, removed 5 redundant places. [2024-06-03 19:29:34,268 INFO L231 Difference]: Finished difference. Result has 245 places, 366 transitions, 4569 flow [2024-06-03 19:29:34,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4253, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4569, PETRI_PLACES=245, PETRI_TRANSITIONS=366} [2024-06-03 19:29:34,268 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 200 predicate places. [2024-06-03 19:29:34,268 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 366 transitions, 4569 flow [2024-06-03 19:29:34,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:34,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:34,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:34,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 19:29:34,269 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)] === [2024-06-03 19:29:34,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:34,269 INFO L85 PathProgramCache]: Analyzing trace with hash -163412500, now seen corresponding path program 2 times [2024-06-03 19:29:34,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:34,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283776725] [2024-06-03 19:29:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:34,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:35,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:35,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283776725] [2024-06-03 19:29:35,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283776725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:35,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:35,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:29:35,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566088356] [2024-06-03 19:29:35,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:35,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:29:35,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:35,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:29:35,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:29:35,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:29:35,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 366 transitions, 4569 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:35,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:35,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:29:35,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:36,533 INFO L124 PetriNetUnfolderBase]: 3394/5081 cut-off events. [2024-06-03 19:29:36,533 INFO L125 PetriNetUnfolderBase]: For 697666/697668 co-relation queries the response was YES. [2024-06-03 19:29:36,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53063 conditions, 5081 events. 3394/5081 cut-off events. For 697666/697668 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 25973 event pairs, 663 based on Foata normal form. 5/5084 useless extension candidates. Maximal degree in co-relation 52957. Up to 4618 conditions per place. [2024-06-03 19:29:36,585 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 354 selfloop transitions, 72 changer transitions 0/430 dead transitions. [2024-06-03 19:29:36,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 430 transitions, 6336 flow [2024-06-03 19:29:36,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:29:36,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:29:36,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-03 19:29:36,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-03 19:29:36,586 INFO L175 Difference]: Start difference. First operand has 245 places, 366 transitions, 4569 flow. Second operand 10 states and 194 transitions. [2024-06-03 19:29:36,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 430 transitions, 6336 flow [2024-06-03 19:29:37,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 430 transitions, 6043 flow, removed 80 selfloop flow, removed 8 redundant places. [2024-06-03 19:29:37,328 INFO L231 Difference]: Finished difference. Result has 250 places, 386 transitions, 4837 flow [2024-06-03 19:29:37,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4289, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4837, PETRI_PLACES=250, PETRI_TRANSITIONS=386} [2024-06-03 19:29:37,328 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-03 19:29:37,329 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 386 transitions, 4837 flow [2024-06-03 19:29:37,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:37,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:37,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:37,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 19:29:37,329 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)] === [2024-06-03 19:29:37,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:37,329 INFO L85 PathProgramCache]: Analyzing trace with hash -568676396, now seen corresponding path program 3 times [2024-06-03 19:29:37,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:37,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873796357] [2024-06-03 19:29:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:37,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:38,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:38,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873796357] [2024-06-03 19:29:38,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873796357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:38,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:38,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:29:38,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870382821] [2024-06-03 19:29:38,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:38,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:29:38,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:38,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:29:38,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:29:38,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:29:38,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 386 transitions, 4837 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:38,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:38,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:29:38,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:39,674 INFO L124 PetriNetUnfolderBase]: 3430/5127 cut-off events. [2024-06-03 19:29:39,674 INFO L125 PetriNetUnfolderBase]: For 729537/729539 co-relation queries the response was YES. [2024-06-03 19:29:39,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54332 conditions, 5127 events. 3430/5127 cut-off events. For 729537/729539 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 26194 event pairs, 673 based on Foata normal form. 8/5133 useless extension candidates. Maximal degree in co-relation 54222. Up to 4554 conditions per place. [2024-06-03 19:29:39,728 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 331 selfloop transitions, 95 changer transitions 0/430 dead transitions. [2024-06-03 19:29:39,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 430 transitions, 6287 flow [2024-06-03 19:29:39,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:29:39,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:29:39,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-03 19:29:39,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-03 19:29:39,733 INFO L175 Difference]: Start difference. First operand has 250 places, 386 transitions, 4837 flow. Second operand 10 states and 197 transitions. [2024-06-03 19:29:39,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 430 transitions, 6287 flow [2024-06-03 19:29:40,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 430 transitions, 6071 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-03 19:29:40,422 INFO L231 Difference]: Finished difference. Result has 256 places, 391 transitions, 5024 flow [2024-06-03 19:29:40,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4625, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5024, PETRI_PLACES=256, PETRI_TRANSITIONS=391} [2024-06-03 19:29:40,423 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 211 predicate places. [2024-06-03 19:29:40,423 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 391 transitions, 5024 flow [2024-06-03 19:29:40,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:40,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:40,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:40,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 19:29:40,423 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)] === [2024-06-03 19:29:40,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:40,423 INFO L85 PathProgramCache]: Analyzing trace with hash -163203250, now seen corresponding path program 4 times [2024-06-03 19:29:40,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:40,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488590007] [2024-06-03 19:29:40,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:40,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:41,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:41,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488590007] [2024-06-03 19:29:41,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488590007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:41,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:41,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:29:41,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212775970] [2024-06-03 19:29:41,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:41,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:29:41,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:41,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:29:41,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:29:41,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:29:41,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 391 transitions, 5024 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:41,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:41,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:29:41,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:42,693 INFO L124 PetriNetUnfolderBase]: 3448/5162 cut-off events. [2024-06-03 19:29:42,693 INFO L125 PetriNetUnfolderBase]: For 746356/746358 co-relation queries the response was YES. [2024-06-03 19:29:42,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55717 conditions, 5162 events. 3448/5162 cut-off events. For 746356/746358 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26420 event pairs, 663 based on Foata normal form. 5/5165 useless extension candidates. Maximal degree in co-relation 55605. Up to 4644 conditions per place. [2024-06-03 19:29:42,749 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 348 selfloop transitions, 94 changer transitions 0/446 dead transitions. [2024-06-03 19:29:42,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 446 transitions, 6750 flow [2024-06-03 19:29:42,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:29:42,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:29:42,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-03 19:29:42,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-03 19:29:42,750 INFO L175 Difference]: Start difference. First operand has 256 places, 391 transitions, 5024 flow. Second operand 10 states and 194 transitions. [2024-06-03 19:29:42,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 446 transitions, 6750 flow [2024-06-03 19:29:43,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 446 transitions, 6224 flow, removed 166 selfloop flow, removed 8 redundant places. [2024-06-03 19:29:43,762 INFO L231 Difference]: Finished difference. Result has 261 places, 407 transitions, 5239 flow [2024-06-03 19:29:43,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4663, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5239, PETRI_PLACES=261, PETRI_TRANSITIONS=407} [2024-06-03 19:29:43,762 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 216 predicate places. [2024-06-03 19:29:43,763 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 407 transitions, 5239 flow [2024-06-03 19:29:43,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:43,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:43,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:43,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 19:29:43,763 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)] === [2024-06-03 19:29:43,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:43,763 INFO L85 PathProgramCache]: Analyzing trace with hash -163202971, now seen corresponding path program 1 times [2024-06-03 19:29:43,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:43,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807390415] [2024-06-03 19:29:43,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:43,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:44,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:44,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807390415] [2024-06-03 19:29:44,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807390415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:44,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:44,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:29:44,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102973905] [2024-06-03 19:29:44,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:44,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:29:44,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:44,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:29:44,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:29:44,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:29:44,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 407 transitions, 5239 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:44,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:44,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:29:44,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:46,086 INFO L124 PetriNetUnfolderBase]: 3476/5207 cut-off events. [2024-06-03 19:29:46,086 INFO L125 PetriNetUnfolderBase]: For 777951/777953 co-relation queries the response was YES. [2024-06-03 19:29:46,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56838 conditions, 5207 events. 3476/5207 cut-off events. For 777951/777953 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 26767 event pairs, 674 based on Foata normal form. 8/5213 useless extension candidates. Maximal degree in co-relation 56722. Up to 4860 conditions per place. [2024-06-03 19:29:46,147 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 373 selfloop transitions, 70 changer transitions 0/447 dead transitions. [2024-06-03 19:29:46,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 447 transitions, 6691 flow [2024-06-03 19:29:46,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:29:46,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:29:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 19:29:46,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-03 19:29:46,148 INFO L175 Difference]: Start difference. First operand has 261 places, 407 transitions, 5239 flow. Second operand 10 states and 190 transitions. [2024-06-03 19:29:46,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 447 transitions, 6691 flow [2024-06-03 19:29:47,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 447 transitions, 6414 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-03 19:29:47,070 INFO L231 Difference]: Finished difference. Result has 266 places, 410 transitions, 5284 flow [2024-06-03 19:29:47,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4962, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5284, PETRI_PLACES=266, PETRI_TRANSITIONS=410} [2024-06-03 19:29:47,072 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 221 predicate places. [2024-06-03 19:29:47,072 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 410 transitions, 5284 flow [2024-06-03 19:29:47,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:47,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:47,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:47,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 19:29:47,072 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)] === [2024-06-03 19:29:47,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:47,072 INFO L85 PathProgramCache]: Analyzing trace with hash 889008604, now seen corresponding path program 5 times [2024-06-03 19:29:47,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:47,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123115596] [2024-06-03 19:29:47,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:47,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:48,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:48,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123115596] [2024-06-03 19:29:48,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123115596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:48,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:48,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:29:48,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633872316] [2024-06-03 19:29:48,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:48,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:29:48,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:48,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:29:48,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:29:48,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:29:48,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 410 transitions, 5284 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:48,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:48,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:29:48,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:49,434 INFO L124 PetriNetUnfolderBase]: 3512/5257 cut-off events. [2024-06-03 19:29:49,435 INFO L125 PetriNetUnfolderBase]: For 801431/801431 co-relation queries the response was YES. [2024-06-03 19:29:49,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57895 conditions, 5257 events. 3512/5257 cut-off events. For 801431/801431 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 27043 event pairs, 663 based on Foata normal form. 6/5261 useless extension candidates. Maximal degree in co-relation 57778. Up to 4439 conditions per place. [2024-06-03 19:29:49,493 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 348 selfloop transitions, 102 changer transitions 0/454 dead transitions. [2024-06-03 19:29:49,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 454 transitions, 6970 flow [2024-06-03 19:29:49,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:29:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:29:49,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-03 19:29:49,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-03 19:29:49,494 INFO L175 Difference]: Start difference. First operand has 266 places, 410 transitions, 5284 flow. Second operand 10 states and 200 transitions. [2024-06-03 19:29:49,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 454 transitions, 6970 flow [2024-06-03 19:29:50,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 454 transitions, 6696 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-03 19:29:50,573 INFO L231 Difference]: Finished difference. Result has 269 places, 415 transitions, 5444 flow [2024-06-03 19:29:50,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5010, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5444, PETRI_PLACES=269, PETRI_TRANSITIONS=415} [2024-06-03 19:29:50,574 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 224 predicate places. [2024-06-03 19:29:50,574 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 415 transitions, 5444 flow [2024-06-03 19:29:50,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:50,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:50,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:50,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 19:29:50,574 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)] === [2024-06-03 19:29:50,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:50,574 INFO L85 PathProgramCache]: Analyzing trace with hash 889016044, now seen corresponding path program 6 times [2024-06-03 19:29:50,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:50,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839124066] [2024-06-03 19:29:50,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:50,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:51,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:51,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839124066] [2024-06-03 19:29:51,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839124066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:51,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:51,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:29:51,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029443579] [2024-06-03 19:29:51,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:51,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:29:51,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:51,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:29:51,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:29:51,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:29:51,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 415 transitions, 5444 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:51,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:51,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:29:51,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:52,936 INFO L124 PetriNetUnfolderBase]: 3554/5333 cut-off events. [2024-06-03 19:29:52,936 INFO L125 PetriNetUnfolderBase]: For 832815/832815 co-relation queries the response was YES. [2024-06-03 19:29:52,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59759 conditions, 5333 events. 3554/5333 cut-off events. For 832815/832815 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 27657 event pairs, 651 based on Foata normal form. 3/5334 useless extension candidates. Maximal degree in co-relation 59641. Up to 4647 conditions per place. [2024-06-03 19:29:52,997 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 381 selfloop transitions, 97 changer transitions 0/482 dead transitions. [2024-06-03 19:29:52,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 482 transitions, 7998 flow [2024-06-03 19:29:52,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:29:52,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:29:52,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-03 19:29:52,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-03 19:29:52,998 INFO L175 Difference]: Start difference. First operand has 269 places, 415 transitions, 5444 flow. Second operand 10 states and 198 transitions. [2024-06-03 19:29:52,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 482 transitions, 7998 flow [2024-06-03 19:29:54,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 482 transitions, 7404 flow, removed 185 selfloop flow, removed 8 redundant places. [2024-06-03 19:29:54,035 INFO L231 Difference]: Finished difference. Result has 274 places, 440 transitions, 5898 flow [2024-06-03 19:29:54,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5046, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5898, PETRI_PLACES=274, PETRI_TRANSITIONS=440} [2024-06-03 19:29:54,035 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 229 predicate places. [2024-06-03 19:29:54,035 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 440 transitions, 5898 flow [2024-06-03 19:29:54,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:54,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:54,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:54,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 19:29:54,036 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)] === [2024-06-03 19:29:54,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:54,036 INFO L85 PathProgramCache]: Analyzing trace with hash 889016323, now seen corresponding path program 2 times [2024-06-03 19:29:54,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:54,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092446151] [2024-06-03 19:29:54,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:54,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:55,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:55,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092446151] [2024-06-03 19:29:55,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092446151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:55,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:55,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:29:55,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425156521] [2024-06-03 19:29:55,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:55,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:29:55,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:55,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:29:55,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:29:55,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:29:55,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 440 transitions, 5898 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:55,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:55,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:29:55,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:56,465 INFO L124 PetriNetUnfolderBase]: 3582/5351 cut-off events. [2024-06-03 19:29:56,465 INFO L125 PetriNetUnfolderBase]: For 866022/866022 co-relation queries the response was YES. [2024-06-03 19:29:56,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60708 conditions, 5351 events. 3582/5351 cut-off events. For 866022/866022 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 27450 event pairs, 671 based on Foata normal form. 6/5355 useless extension candidates. Maximal degree in co-relation 60586. Up to 4919 conditions per place. [2024-06-03 19:29:56,532 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 401 selfloop transitions, 74 changer transitions 0/479 dead transitions. [2024-06-03 19:29:56,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 479 transitions, 7580 flow [2024-06-03 19:29:56,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:29:56,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:29:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-03 19:29:56,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2024-06-03 19:29:56,533 INFO L175 Difference]: Start difference. First operand has 274 places, 440 transitions, 5898 flow. Second operand 10 states and 191 transitions. [2024-06-03 19:29:56,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 479 transitions, 7580 flow [2024-06-03 19:29:57,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 479 transitions, 7266 flow, removed 118 selfloop flow, removed 4 redundant places. [2024-06-03 19:29:57,624 INFO L231 Difference]: Finished difference. Result has 280 places, 443 transitions, 5928 flow [2024-06-03 19:29:57,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5584, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5928, PETRI_PLACES=280, PETRI_TRANSITIONS=443} [2024-06-03 19:29:57,624 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 235 predicate places. [2024-06-03 19:29:57,624 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 443 transitions, 5928 flow [2024-06-03 19:29:57,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:57,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:29:57,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:29:57,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 19:29:57,625 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)] === [2024-06-03 19:29:57,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:29:57,625 INFO L85 PathProgramCache]: Analyzing trace with hash 483341088, now seen corresponding path program 7 times [2024-06-03 19:29:57,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:29:57,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383764817] [2024-06-03 19:29:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:29:57,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:29:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:29:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:29:58,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:29:58,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383764817] [2024-06-03 19:29:58,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383764817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:29:58,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:29:58,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:29:58,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660818916] [2024-06-03 19:29:58,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:29:58,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:29:58,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:29:58,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:29:58,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:29:58,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:29:58,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 443 transitions, 5928 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:29:58,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:29:58,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:29:58,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:29:59,967 INFO L124 PetriNetUnfolderBase]: 3594/5379 cut-off events. [2024-06-03 19:29:59,967 INFO L125 PetriNetUnfolderBase]: For 880936/880936 co-relation queries the response was YES. [2024-06-03 19:30:00,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61148 conditions, 5379 events. 3594/5379 cut-off events. For 880936/880936 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 27744 event pairs, 663 based on Foata normal form. 6/5383 useless extension candidates. Maximal degree in co-relation 61024. Up to 4561 conditions per place. [2024-06-03 19:30:00,038 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 366 selfloop transitions, 115 changer transitions 0/485 dead transitions. [2024-06-03 19:30:00,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 485 transitions, 7817 flow [2024-06-03 19:30:00,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:30:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:30:00,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-03 19:30:00,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-03 19:30:00,039 INFO L175 Difference]: Start difference. First operand has 280 places, 443 transitions, 5928 flow. Second operand 10 states and 199 transitions. [2024-06-03 19:30:00,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 485 transitions, 7817 flow [2024-06-03 19:30:01,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 485 transitions, 7361 flow, removed 156 selfloop flow, removed 8 redundant places. [2024-06-03 19:30:01,093 INFO L231 Difference]: Finished difference. Result has 282 places, 447 transitions, 5940 flow [2024-06-03 19:30:01,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5472, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5940, PETRI_PLACES=282, PETRI_TRANSITIONS=447} [2024-06-03 19:30:01,093 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 237 predicate places. [2024-06-03 19:30:01,093 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 447 transitions, 5940 flow [2024-06-03 19:30:01,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:01,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:01,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:30:01,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 19:30:01,094 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)] === [2024-06-03 19:30:01,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:01,094 INFO L85 PathProgramCache]: Analyzing trace with hash 490700457, now seen corresponding path program 3 times [2024-06-03 19:30:01,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:01,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700533672] [2024-06-03 19:30:01,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:01,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:30:02,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:02,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700533672] [2024-06-03 19:30:02,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700533672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:02,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:02,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:30:02,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2927916] [2024-06-03 19:30:02,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:02,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:30:02,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:02,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:30:02,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:30:02,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:30:02,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 447 transitions, 5940 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:02,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:02,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:30:02,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:30:03,638 INFO L124 PetriNetUnfolderBase]: 3638/5445 cut-off events. [2024-06-03 19:30:03,638 INFO L125 PetriNetUnfolderBase]: For 910364/910364 co-relation queries the response was YES. [2024-06-03 19:30:03,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62564 conditions, 5445 events. 3638/5445 cut-off events. For 910364/910364 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 28188 event pairs, 673 based on Foata normal form. 6/5449 useless extension candidates. Maximal degree in co-relation 62439. Up to 4932 conditions per place. [2024-06-03 19:30:03,707 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 389 selfloop transitions, 92 changer transitions 0/485 dead transitions. [2024-06-03 19:30:03,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 485 transitions, 7640 flow [2024-06-03 19:30:03,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:30:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:30:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-03 19:30:03,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:30:03,708 INFO L175 Difference]: Start difference. First operand has 282 places, 447 transitions, 5940 flow. Second operand 9 states and 176 transitions. [2024-06-03 19:30:03,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 485 transitions, 7640 flow [2024-06-03 19:30:04,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 485 transitions, 7198 flow, removed 111 selfloop flow, removed 8 redundant places. [2024-06-03 19:30:04,812 INFO L231 Difference]: Finished difference. Result has 284 places, 453 transitions, 6066 flow [2024-06-03 19:30:04,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5498, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6066, PETRI_PLACES=284, PETRI_TRANSITIONS=453} [2024-06-03 19:30:04,813 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 239 predicate places. [2024-06-03 19:30:04,813 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 453 transitions, 6066 flow [2024-06-03 19:30:04,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:04,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:04,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:30:04,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 19:30:04,813 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)] === [2024-06-03 19:30:04,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:04,814 INFO L85 PathProgramCache]: Analyzing trace with hash 490969227, now seen corresponding path program 4 times [2024-06-03 19:30:04,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:04,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384789222] [2024-06-03 19:30:04,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:04,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:30:05,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:05,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384789222] [2024-06-03 19:30:05,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384789222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:05,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:05,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:30:05,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587712659] [2024-06-03 19:30:05,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:05,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:30:05,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:05,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:30:05,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:30:06,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:30:06,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 453 transitions, 6066 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:06,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:06,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:30:06,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:30:07,399 INFO L124 PetriNetUnfolderBase]: 4000/5980 cut-off events. [2024-06-03 19:30:07,400 INFO L125 PetriNetUnfolderBase]: For 975671/975671 co-relation queries the response was YES. [2024-06-03 19:30:07,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67815 conditions, 5980 events. 4000/5980 cut-off events. For 975671/975671 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 31409 event pairs, 671 based on Foata normal form. 6/5980 useless extension candidates. Maximal degree in co-relation 67688. Up to 5428 conditions per place. [2024-06-03 19:30:07,479 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 447 selfloop transitions, 105 changer transitions 0/556 dead transitions. [2024-06-03 19:30:07,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 556 transitions, 9030 flow [2024-06-03 19:30:07,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:30:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:30:07,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-03 19:30:07,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42355371900826444 [2024-06-03 19:30:07,480 INFO L175 Difference]: Start difference. First operand has 284 places, 453 transitions, 6066 flow. Second operand 11 states and 205 transitions. [2024-06-03 19:30:07,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 556 transitions, 9030 flow [2024-06-03 19:30:08,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 556 transitions, 8536 flow, removed 188 selfloop flow, removed 5 redundant places. [2024-06-03 19:30:08,880 INFO L231 Difference]: Finished difference. Result has 294 places, 515 transitions, 7224 flow [2024-06-03 19:30:08,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5796, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7224, PETRI_PLACES=294, PETRI_TRANSITIONS=515} [2024-06-03 19:30:08,880 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 249 predicate places. [2024-06-03 19:30:08,880 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 515 transitions, 7224 flow [2024-06-03 19:30:08,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:08,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:08,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:30:08,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 19:30:08,881 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)] === [2024-06-03 19:30:08,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:08,881 INFO L85 PathProgramCache]: Analyzing trace with hash 896165884, now seen corresponding path program 8 times [2024-06-03 19:30:08,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:08,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484623740] [2024-06-03 19:30:08,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:08,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:30:09,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:09,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484623740] [2024-06-03 19:30:09,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484623740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:09,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:09,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:30:09,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806199906] [2024-06-03 19:30:09,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:09,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:30:09,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:09,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:30:09,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:30:10,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:30:10,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 515 transitions, 7224 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:10,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:10,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:30:10,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:30:11,590 INFO L124 PetriNetUnfolderBase]: 4078/6100 cut-off events. [2024-06-03 19:30:11,590 INFO L125 PetriNetUnfolderBase]: For 992869/992869 co-relation queries the response was YES. [2024-06-03 19:30:11,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69786 conditions, 6100 events. 4078/6100 cut-off events. For 992869/992869 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 32201 event pairs, 660 based on Foata normal form. 3/6101 useless extension candidates. Maximal degree in co-relation 69653. Up to 5277 conditions per place. [2024-06-03 19:30:11,663 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 428 selfloop transitions, 141 changer transitions 0/573 dead transitions. [2024-06-03 19:30:11,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 573 transitions, 9631 flow [2024-06-03 19:30:11,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:30:11,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:30:11,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-03 19:30:11,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-03 19:30:11,664 INFO L175 Difference]: Start difference. First operand has 294 places, 515 transitions, 7224 flow. Second operand 10 states and 197 transitions. [2024-06-03 19:30:11,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 573 transitions, 9631 flow [2024-06-03 19:30:13,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 573 transitions, 9360 flow, removed 96 selfloop flow, removed 3 redundant places. [2024-06-03 19:30:13,075 INFO L231 Difference]: Finished difference. Result has 303 places, 533 transitions, 7838 flow [2024-06-03 19:30:13,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6956, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7838, PETRI_PLACES=303, PETRI_TRANSITIONS=533} [2024-06-03 19:30:13,076 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 258 predicate places. [2024-06-03 19:30:13,076 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 533 transitions, 7838 flow [2024-06-03 19:30:13,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:13,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:13,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:30:13,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 19:30:13,076 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)] === [2024-06-03 19:30:13,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:13,077 INFO L85 PathProgramCache]: Analyzing trace with hash 490959648, now seen corresponding path program 9 times [2024-06-03 19:30:13,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:13,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482903431] [2024-06-03 19:30:13,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:13,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:30:14,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:14,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482903431] [2024-06-03 19:30:14,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482903431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:14,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:14,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:30:14,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806634327] [2024-06-03 19:30:14,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:14,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:30:14,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:14,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:30:14,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:30:14,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:30:14,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 533 transitions, 7838 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:14,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:14,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:30:14,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:30:16,028 INFO L124 PetriNetUnfolderBase]: 4132/6177 cut-off events. [2024-06-03 19:30:16,028 INFO L125 PetriNetUnfolderBase]: For 1049111/1049111 co-relation queries the response was YES. [2024-06-03 19:30:16,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71900 conditions, 6177 events. 4132/6177 cut-off events. For 1049111/1049111 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 32611 event pairs, 672 based on Foata normal form. 9/6184 useless extension candidates. Maximal degree in co-relation 71764. Up to 4868 conditions per place. [2024-06-03 19:30:16,113 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 326 selfloop transitions, 257 changer transitions 0/587 dead transitions. [2024-06-03 19:30:16,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 587 transitions, 10254 flow [2024-06-03 19:30:16,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:30:16,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:30:16,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2024-06-03 19:30:16,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-03 19:30:16,114 INFO L175 Difference]: Start difference. First operand has 303 places, 533 transitions, 7838 flow. Second operand 12 states and 236 transitions. [2024-06-03 19:30:16,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 587 transitions, 10254 flow [2024-06-03 19:30:17,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 587 transitions, 9730 flow, removed 213 selfloop flow, removed 4 redundant places. [2024-06-03 19:30:17,747 INFO L231 Difference]: Finished difference. Result has 311 places, 542 transitions, 8359 flow [2024-06-03 19:30:17,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7314, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8359, PETRI_PLACES=311, PETRI_TRANSITIONS=542} [2024-06-03 19:30:17,748 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 266 predicate places. [2024-06-03 19:30:17,748 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 542 transitions, 8359 flow [2024-06-03 19:30:17,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:17,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:17,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:30:17,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 19:30:17,748 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:30:17,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:17,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1408427846, now seen corresponding path program 1 times [2024-06-03 19:30:17,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:17,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793005553] [2024-06-03 19:30:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:17,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:30:18,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:18,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793005553] [2024-06-03 19:30:18,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793005553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:18,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:18,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:30:18,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616506077] [2024-06-03 19:30:18,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:18,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:30:18,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:18,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:30:18,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:30:18,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:30:18,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 542 transitions, 8359 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:18,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:18,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:30:18,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:30:20,190 INFO L124 PetriNetUnfolderBase]: 4137/6190 cut-off events. [2024-06-03 19:30:20,190 INFO L125 PetriNetUnfolderBase]: For 1050984/1050984 co-relation queries the response was YES. [2024-06-03 19:30:20,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73289 conditions, 6190 events. 4137/6190 cut-off events. For 1050984/1050984 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 32718 event pairs, 688 based on Foata normal form. 1/6185 useless extension candidates. Maximal degree in co-relation 73151. Up to 5965 conditions per place. [2024-06-03 19:30:20,281 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 507 selfloop transitions, 51 changer transitions 0/562 dead transitions. [2024-06-03 19:30:20,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 562 transitions, 9912 flow [2024-06-03 19:30:20,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:30:20,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:30:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 19:30:20,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-03 19:30:20,282 INFO L175 Difference]: Start difference. First operand has 311 places, 542 transitions, 8359 flow. Second operand 8 states and 143 transitions. [2024-06-03 19:30:20,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 562 transitions, 9912 flow [2024-06-03 19:30:21,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 562 transitions, 9272 flow, removed 146 selfloop flow, removed 11 redundant places. [2024-06-03 19:30:21,776 INFO L231 Difference]: Finished difference. Result has 308 places, 545 transitions, 7908 flow [2024-06-03 19:30:21,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7727, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7908, PETRI_PLACES=308, PETRI_TRANSITIONS=545} [2024-06-03 19:30:21,776 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 263 predicate places. [2024-06-03 19:30:21,776 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 545 transitions, 7908 flow [2024-06-03 19:30:21,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:21,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:21,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:30:21,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 19:30:21,777 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:30:21,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:21,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1408786330, now seen corresponding path program 1 times [2024-06-03 19:30:21,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:21,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538239341] [2024-06-03 19:30:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:21,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:30:22,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:22,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538239341] [2024-06-03 19:30:22,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538239341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:22,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:22,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:30:22,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164225002] [2024-06-03 19:30:22,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:22,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:30:22,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:22,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:30:22,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:30:22,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:30:22,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 545 transitions, 7908 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:22,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:22,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:30:22,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:30:24,148 INFO L124 PetriNetUnfolderBase]: 3941/5993 cut-off events. [2024-06-03 19:30:24,148 INFO L125 PetriNetUnfolderBase]: For 1025602/1025605 co-relation queries the response was YES. [2024-06-03 19:30:24,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69875 conditions, 5993 events. 3941/5993 cut-off events. For 1025602/1025605 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 32478 event pairs, 690 based on Foata normal form. 3/5993 useless extension candidates. Maximal degree in co-relation 69736. Up to 5445 conditions per place. [2024-06-03 19:30:24,233 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 472 selfloop transitions, 38 changer transitions 0/570 dead transitions. [2024-06-03 19:30:24,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 570 transitions, 9426 flow [2024-06-03 19:30:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:30:24,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:30:24,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 19:30:24,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-03 19:30:24,234 INFO L175 Difference]: Start difference. First operand has 308 places, 545 transitions, 7908 flow. Second operand 8 states and 145 transitions. [2024-06-03 19:30:24,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 570 transitions, 9426 flow [2024-06-03 19:30:26,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 570 transitions, 9301 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 19:30:26,023 INFO L231 Difference]: Finished difference. Result has 311 places, 556 transitions, 8037 flow [2024-06-03 19:30:26,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7783, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8037, PETRI_PLACES=311, PETRI_TRANSITIONS=556} [2024-06-03 19:30:26,024 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 266 predicate places. [2024-06-03 19:30:26,024 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 556 transitions, 8037 flow [2024-06-03 19:30:26,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:26,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:26,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:30:26,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 19:30:26,024 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:30:26,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:26,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1408785896, now seen corresponding path program 2 times [2024-06-03 19:30:26,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:26,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077571222] [2024-06-03 19:30:26,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:26,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:30:26,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:26,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077571222] [2024-06-03 19:30:26,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077571222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:26,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:26,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:30:26,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493852080] [2024-06-03 19:30:26,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:26,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:30:26,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:26,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:30:26,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:30:26,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:30:26,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 556 transitions, 8037 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:26,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:26,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:30:26,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:30:28,422 INFO L124 PetriNetUnfolderBase]: 4155/6209 cut-off events. [2024-06-03 19:30:28,423 INFO L125 PetriNetUnfolderBase]: For 1059184/1059184 co-relation queries the response was YES. [2024-06-03 19:30:28,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72982 conditions, 6209 events. 4155/6209 cut-off events. For 1059184/1059184 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 32735 event pairs, 688 based on Foata normal form. 1/6204 useless extension candidates. Maximal degree in co-relation 72841. Up to 5989 conditions per place. [2024-06-03 19:30:28,508 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 516 selfloop transitions, 53 changer transitions 0/573 dead transitions. [2024-06-03 19:30:28,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 573 transitions, 9602 flow [2024-06-03 19:30:28,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:30:28,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:30:28,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 19:30:28,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-03 19:30:28,509 INFO L175 Difference]: Start difference. First operand has 311 places, 556 transitions, 8037 flow. Second operand 8 states and 140 transitions. [2024-06-03 19:30:28,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 573 transitions, 9602 flow [2024-06-03 19:30:30,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 573 transitions, 9530 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-03 19:30:30,333 INFO L231 Difference]: Finished difference. Result has 316 places, 559 transitions, 8149 flow [2024-06-03 19:30:30,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7965, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8149, PETRI_PLACES=316, PETRI_TRANSITIONS=559} [2024-06-03 19:30:30,334 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 271 predicate places. [2024-06-03 19:30:30,334 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 559 transitions, 8149 flow [2024-06-03 19:30:30,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:30,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:30,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:30:30,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 19:30:30,334 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)] === [2024-06-03 19:30:30,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:30,335 INFO L85 PathProgramCache]: Analyzing trace with hash 164219235, now seen corresponding path program 5 times [2024-06-03 19:30:30,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:30,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349771336] [2024-06-03 19:30:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:30,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:30:31,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:31,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349771336] [2024-06-03 19:30:31,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349771336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:31,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:31,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:30:31,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208734536] [2024-06-03 19:30:31,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:31,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:30:31,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:31,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:30:31,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:30:31,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:30:31,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 559 transitions, 8149 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:31,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:31,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:30:31,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:30:33,161 INFO L124 PetriNetUnfolderBase]: 4183/6255 cut-off events. [2024-06-03 19:30:33,162 INFO L125 PetriNetUnfolderBase]: For 1104414/1104417 co-relation queries the response was YES. [2024-06-03 19:30:33,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73946 conditions, 6255 events. 4183/6255 cut-off events. For 1104414/1104417 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 33039 event pairs, 703 based on Foata normal form. 8/6253 useless extension candidates. Maximal degree in co-relation 73803. Up to 5511 conditions per place. [2024-06-03 19:30:33,249 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 454 selfloop transitions, 142 changer transitions 0/600 dead transitions. [2024-06-03 19:30:33,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 600 transitions, 10159 flow [2024-06-03 19:30:33,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:30:33,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:30:33,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-03 19:30:33,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43388429752066116 [2024-06-03 19:30:33,250 INFO L175 Difference]: Start difference. First operand has 316 places, 559 transitions, 8149 flow. Second operand 11 states and 210 transitions. [2024-06-03 19:30:33,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 600 transitions, 10159 flow [2024-06-03 19:30:34,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 600 transitions, 10054 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 19:30:34,695 INFO L231 Difference]: Finished difference. Result has 322 places, 562 transitions, 8555 flow [2024-06-03 19:30:34,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8044, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8555, PETRI_PLACES=322, PETRI_TRANSITIONS=562} [2024-06-03 19:30:34,696 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 277 predicate places. [2024-06-03 19:30:34,696 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 562 transitions, 8555 flow [2024-06-03 19:30:34,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:34,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:34,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:30:34,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 19:30:34,696 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:30:34,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:34,697 INFO L85 PathProgramCache]: Analyzing trace with hash -273243328, now seen corresponding path program 10 times [2024-06-03 19:30:34,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:34,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365164626] [2024-06-03 19:30:34,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:34,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:30:35,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:35,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365164626] [2024-06-03 19:30:35,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365164626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:35,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:35,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:30:35,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420572736] [2024-06-03 19:30:35,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:35,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:30:35,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:35,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:30:35,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:30:35,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:30:35,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 562 transitions, 8555 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:35,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:35,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:30:35,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:30:37,307 INFO L124 PetriNetUnfolderBase]: 4225/6326 cut-off events. [2024-06-03 19:30:37,307 INFO L125 PetriNetUnfolderBase]: For 1145079/1145082 co-relation queries the response was YES. [2024-06-03 19:30:37,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76409 conditions, 6326 events. 4225/6326 cut-off events. For 1145079/1145082 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 33560 event pairs, 677 based on Foata normal form. 5/6320 useless extension candidates. Maximal degree in co-relation 76265. Up to 5204 conditions per place. [2024-06-03 19:30:37,402 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 466 selfloop transitions, 158 changer transitions 0/628 dead transitions. [2024-06-03 19:30:37,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 628 transitions, 11413 flow [2024-06-03 19:30:37,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:30:37,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:30:37,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-03 19:30:37,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-03 19:30:37,403 INFO L175 Difference]: Start difference. First operand has 322 places, 562 transitions, 8555 flow. Second operand 10 states and 200 transitions. [2024-06-03 19:30:37,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 628 transitions, 11413 flow [2024-06-03 19:30:39,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 628 transitions, 10928 flow, removed 103 selfloop flow, removed 9 redundant places. [2024-06-03 19:30:39,582 INFO L231 Difference]: Finished difference. Result has 325 places, 587 transitions, 9167 flow [2024-06-03 19:30:39,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8070, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9167, PETRI_PLACES=325, PETRI_TRANSITIONS=587} [2024-06-03 19:30:39,583 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-03 19:30:39,583 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 587 transitions, 9167 flow [2024-06-03 19:30:39,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:39,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:39,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:30:39,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 19:30:39,584 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:30:39,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:39,584 INFO L85 PathProgramCache]: Analyzing trace with hash 164228535, now seen corresponding path program 6 times [2024-06-03 19:30:39,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:39,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411130781] [2024-06-03 19:30:39,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:39,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:30:40,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:40,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411130781] [2024-06-03 19:30:40,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411130781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:40,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:40,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:30:40,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906252954] [2024-06-03 19:30:40,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:40,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:30:40,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:40,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:30:40,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:30:40,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:30:40,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 587 transitions, 9167 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:40,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:40,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:30:40,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:30:42,454 INFO L124 PetriNetUnfolderBase]: 4291/6414 cut-off events. [2024-06-03 19:30:42,455 INFO L125 PetriNetUnfolderBase]: For 1217193/1217196 co-relation queries the response was YES. [2024-06-03 19:30:42,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79173 conditions, 6414 events. 4291/6414 cut-off events. For 1217193/1217196 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 33972 event pairs, 691 based on Foata normal form. 8/6412 useless extension candidates. Maximal degree in co-relation 79026. Up to 5579 conditions per place. [2024-06-03 19:30:42,549 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 477 selfloop transitions, 149 changer transitions 0/630 dead transitions. [2024-06-03 19:30:42,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 630 transitions, 11781 flow [2024-06-03 19:30:42,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:30:42,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:30:42,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-03 19:30:42,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-03 19:30:42,550 INFO L175 Difference]: Start difference. First operand has 325 places, 587 transitions, 9167 flow. Second operand 10 states and 196 transitions. [2024-06-03 19:30:42,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 630 transitions, 11781 flow [2024-06-03 19:30:44,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 630 transitions, 11333 flow, removed 159 selfloop flow, removed 4 redundant places. [2024-06-03 19:30:44,708 INFO L231 Difference]: Finished difference. Result has 331 places, 593 transitions, 9475 flow [2024-06-03 19:30:44,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8719, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9475, PETRI_PLACES=331, PETRI_TRANSITIONS=593} [2024-06-03 19:30:44,708 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 286 predicate places. [2024-06-03 19:30:44,709 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 593 transitions, 9475 flow [2024-06-03 19:30:44,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:44,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:44,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:30:44,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 19:30:44,709 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:30:44,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:44,710 INFO L85 PathProgramCache]: Analyzing trace with hash 869399374, now seen corresponding path program 11 times [2024-06-03 19:30:44,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:44,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994909998] [2024-06-03 19:30:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:44,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:30:45,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:45,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994909998] [2024-06-03 19:30:45,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994909998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:45,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:45,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:30:45,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254035996] [2024-06-03 19:30:45,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:45,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:30:45,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:45,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:30:45,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:30:45,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:30:45,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 593 transitions, 9475 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:45,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:45,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:30:45,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:30:47,581 INFO L124 PetriNetUnfolderBase]: 4327/6467 cut-off events. [2024-06-03 19:30:47,581 INFO L125 PetriNetUnfolderBase]: For 1247526/1247529 co-relation queries the response was YES. [2024-06-03 19:30:47,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80492 conditions, 6467 events. 4327/6467 cut-off events. For 1247526/1247529 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 34301 event pairs, 702 based on Foata normal form. 8/6464 useless extension candidates. Maximal degree in co-relation 80343. Up to 5180 conditions per place. [2024-06-03 19:30:47,677 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 445 selfloop transitions, 187 changer transitions 0/636 dead transitions. [2024-06-03 19:30:47,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 636 transitions, 11822 flow [2024-06-03 19:30:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:30:47,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:30:47,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-03 19:30:47,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-06-03 19:30:47,679 INFO L175 Difference]: Start difference. First operand has 331 places, 593 transitions, 9475 flow. Second operand 10 states and 201 transitions. [2024-06-03 19:30:47,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 636 transitions, 11822 flow [2024-06-03 19:30:50,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 636 transitions, 11383 flow, removed 134 selfloop flow, removed 6 redundant places. [2024-06-03 19:30:50,041 INFO L231 Difference]: Finished difference. Result has 335 places, 601 transitions, 9906 flow [2024-06-03 19:30:50,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9036, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9906, PETRI_PLACES=335, PETRI_TRANSITIONS=601} [2024-06-03 19:30:50,041 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 290 predicate places. [2024-06-03 19:30:50,041 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 601 transitions, 9906 flow [2024-06-03 19:30:50,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:50,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:50,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:30:50,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 19:30:50,042 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:30:50,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:50,042 INFO L85 PathProgramCache]: Analyzing trace with hash 163959486, now seen corresponding path program 12 times [2024-06-03 19:30:50,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:50,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154316312] [2024-06-03 19:30:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:50,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:30:51,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:51,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154316312] [2024-06-03 19:30:51,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154316312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:51,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:51,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:30:51,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090322309] [2024-06-03 19:30:51,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:51,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:30:51,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:51,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:30:51,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:30:51,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:30:51,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 601 transitions, 9906 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:51,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:51,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:30:51,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:30:52,928 INFO L124 PetriNetUnfolderBase]: 4345/6493 cut-off events. [2024-06-03 19:30:52,928 INFO L125 PetriNetUnfolderBase]: For 1258033/1258036 co-relation queries the response was YES. [2024-06-03 19:30:52,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81551 conditions, 6493 events. 4345/6493 cut-off events. For 1258033/1258036 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 34470 event pairs, 702 based on Foata normal form. 5/6487 useless extension candidates. Maximal degree in co-relation 81400. Up to 5180 conditions per place. [2024-06-03 19:30:53,024 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 445 selfloop transitions, 195 changer transitions 0/644 dead transitions. [2024-06-03 19:30:53,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 644 transitions, 12035 flow [2024-06-03 19:30:53,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:30:53,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:30:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-03 19:30:53,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45041322314049587 [2024-06-03 19:30:53,025 INFO L175 Difference]: Start difference. First operand has 335 places, 601 transitions, 9906 flow. Second operand 11 states and 218 transitions. [2024-06-03 19:30:53,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 644 transitions, 12035 flow [2024-06-03 19:30:55,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 644 transitions, 11235 flow, removed 218 selfloop flow, removed 8 redundant places. [2024-06-03 19:30:55,628 INFO L231 Difference]: Finished difference. Result has 338 places, 605 transitions, 9735 flow [2024-06-03 19:30:55,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9106, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9735, PETRI_PLACES=338, PETRI_TRANSITIONS=605} [2024-06-03 19:30:55,629 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 293 predicate places. [2024-06-03 19:30:55,629 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 605 transitions, 9735 flow [2024-06-03 19:30:55,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:55,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:30:55,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:30:55,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 19:30:55,629 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)] === [2024-06-03 19:30:55,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:30:55,630 INFO L85 PathProgramCache]: Analyzing trace with hash 156600396, now seen corresponding path program 13 times [2024-06-03 19:30:55,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:30:55,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124131773] [2024-06-03 19:30:55,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:30:55,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:30:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:30:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:30:56,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:30:56,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124131773] [2024-06-03 19:30:56,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124131773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:30:56,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:30:56,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:30:56,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738416848] [2024-06-03 19:30:56,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:30:56,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:30:56,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:30:56,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:30:56,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:30:56,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:30:56,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 605 transitions, 9735 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:30:56,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:30:56,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:30:56,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:30:58,423 INFO L124 PetriNetUnfolderBase]: 4381/6545 cut-off events. [2024-06-03 19:30:58,423 INFO L125 PetriNetUnfolderBase]: For 1295774/1295777 co-relation queries the response was YES. [2024-06-03 19:30:58,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82231 conditions, 6545 events. 4381/6545 cut-off events. For 1295774/1295777 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 34729 event pairs, 702 based on Foata normal form. 8/6542 useless extension candidates. Maximal degree in co-relation 82079. Up to 5258 conditions per place. [2024-06-03 19:30:58,528 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 463 selfloop transitions, 183 changer transitions 0/650 dead transitions. [2024-06-03 19:30:58,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 650 transitions, 12490 flow [2024-06-03 19:30:58,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:30:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:30:58,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-03 19:30:58,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-03 19:30:58,529 INFO L175 Difference]: Start difference. First operand has 338 places, 605 transitions, 9735 flow. Second operand 10 states and 200 transitions. [2024-06-03 19:30:58,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 650 transitions, 12490 flow [2024-06-03 19:31:01,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 650 transitions, 11927 flow, removed 94 selfloop flow, removed 9 redundant places. [2024-06-03 19:31:01,070 INFO L231 Difference]: Finished difference. Result has 339 places, 613 transitions, 10058 flow [2024-06-03 19:31:01,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9172, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10058, PETRI_PLACES=339, PETRI_TRANSITIONS=613} [2024-06-03 19:31:01,071 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 294 predicate places. [2024-06-03 19:31:01,071 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 613 transitions, 10058 flow [2024-06-03 19:31:01,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:01,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:01,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:01,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 19:31:01,071 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)] === [2024-06-03 19:31:01,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:01,072 INFO L85 PathProgramCache]: Analyzing trace with hash 156809925, now seen corresponding path program 7 times [2024-06-03 19:31:01,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:01,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105383529] [2024-06-03 19:31:01,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:01,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:02,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:02,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105383529] [2024-06-03 19:31:02,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105383529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:02,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:02,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:31:02,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612208714] [2024-06-03 19:31:02,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:02,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:31:02,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:02,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:31:02,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:31:02,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:31:02,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 613 transitions, 10058 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:02,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:02,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:31:02,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:04,091 INFO L124 PetriNetUnfolderBase]: 4371/6530 cut-off events. [2024-06-03 19:31:04,091 INFO L125 PetriNetUnfolderBase]: For 1301171/1301174 co-relation queries the response was YES. [2024-06-03 19:31:04,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82005 conditions, 6530 events. 4371/6530 cut-off events. For 1301171/1301174 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 34648 event pairs, 693 based on Foata normal form. 8/6528 useless extension candidates. Maximal degree in co-relation 81852. Up to 5510 conditions per place. [2024-06-03 19:31:04,190 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 477 selfloop transitions, 173 changer transitions 0/654 dead transitions. [2024-06-03 19:31:04,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 654 transitions, 12622 flow [2024-06-03 19:31:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:31:04,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:31:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-03 19:31:04,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-03 19:31:04,191 INFO L175 Difference]: Start difference. First operand has 339 places, 613 transitions, 10058 flow. Second operand 9 states and 179 transitions. [2024-06-03 19:31:04,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 654 transitions, 12622 flow [2024-06-03 19:31:06,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 654 transitions, 11652 flow, removed 307 selfloop flow, removed 8 redundant places. [2024-06-03 19:31:07,065 INFO L231 Difference]: Finished difference. Result has 343 places, 622 transitions, 10063 flow [2024-06-03 19:31:07,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9088, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10063, PETRI_PLACES=343, PETRI_TRANSITIONS=622} [2024-06-03 19:31:07,065 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-03 19:31:07,065 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 622 transitions, 10063 flow [2024-06-03 19:31:07,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:07,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:07,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:07,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 19:31:07,070 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)] === [2024-06-03 19:31:07,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:07,070 INFO L85 PathProgramCache]: Analyzing trace with hash 156802206, now seen corresponding path program 14 times [2024-06-03 19:31:07,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:07,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602190004] [2024-06-03 19:31:07,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:07,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:08,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:08,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602190004] [2024-06-03 19:31:08,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602190004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:08,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:08,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:31:08,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485106105] [2024-06-03 19:31:08,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:08,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:31:08,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:08,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:31:08,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:31:08,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:31:08,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 622 transitions, 10063 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:08,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:08,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:31:08,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:10,241 INFO L124 PetriNetUnfolderBase]: 4407/6583 cut-off events. [2024-06-03 19:31:10,241 INFO L125 PetriNetUnfolderBase]: For 1329322/1329325 co-relation queries the response was YES. [2024-06-03 19:31:10,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83158 conditions, 6583 events. 4407/6583 cut-off events. For 1329322/1329325 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 35012 event pairs, 700 based on Foata normal form. 8/6580 useless extension candidates. Maximal degree in co-relation 83001. Up to 5296 conditions per place. [2024-06-03 19:31:10,334 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 479 selfloop transitions, 184 changer transitions 0/667 dead transitions. [2024-06-03 19:31:10,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 667 transitions, 12721 flow [2024-06-03 19:31:10,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:31:10,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:31:10,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-03 19:31:10,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-06-03 19:31:10,335 INFO L175 Difference]: Start difference. First operand has 343 places, 622 transitions, 10063 flow. Second operand 10 states and 201 transitions. [2024-06-03 19:31:10,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 667 transitions, 12721 flow [2024-06-03 19:31:12,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 667 transitions, 12587 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-03 19:31:12,158 INFO L231 Difference]: Finished difference. Result has 349 places, 630 transitions, 10837 flow [2024-06-03 19:31:12,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9931, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10837, PETRI_PLACES=349, PETRI_TRANSITIONS=630} [2024-06-03 19:31:12,158 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 304 predicate places. [2024-06-03 19:31:12,158 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 630 transitions, 10837 flow [2024-06-03 19:31:12,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:12,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:12,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:12,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 19:31:12,159 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)] === [2024-06-03 19:31:12,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:12,159 INFO L85 PathProgramCache]: Analyzing trace with hash 156809646, now seen corresponding path program 15 times [2024-06-03 19:31:12,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:12,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137573155] [2024-06-03 19:31:12,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:12,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:13,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:13,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137573155] [2024-06-03 19:31:13,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137573155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:13,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:13,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:31:13,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528856557] [2024-06-03 19:31:13,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:13,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:31:13,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:13,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:31:13,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:31:13,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:31:13,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 630 transitions, 10837 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:13,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:13,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:31:13,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:15,140 INFO L124 PetriNetUnfolderBase]: 4401/6575 cut-off events. [2024-06-03 19:31:15,140 INFO L125 PetriNetUnfolderBase]: For 1337785/1337788 co-relation queries the response was YES. [2024-06-03 19:31:15,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84107 conditions, 6575 events. 4401/6575 cut-off events. For 1337785/1337788 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 34954 event pairs, 700 based on Foata normal form. 5/6569 useless extension candidates. Maximal degree in co-relation 83948. Up to 5236 conditions per place. [2024-06-03 19:31:15,238 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 467 selfloop transitions, 200 changer transitions 0/671 dead transitions. [2024-06-03 19:31:15,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 671 transitions, 13015 flow [2024-06-03 19:31:15,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:31:15,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:31:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-03 19:31:15,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-03 19:31:15,239 INFO L175 Difference]: Start difference. First operand has 349 places, 630 transitions, 10837 flow. Second operand 11 states and 220 transitions. [2024-06-03 19:31:15,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 671 transitions, 13015 flow [2024-06-03 19:31:18,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 671 transitions, 12013 flow, removed 322 selfloop flow, removed 8 redundant places. [2024-06-03 19:31:18,584 INFO L231 Difference]: Finished difference. Result has 352 places, 630 transitions, 10254 flow [2024-06-03 19:31:18,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9835, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10254, PETRI_PLACES=352, PETRI_TRANSITIONS=630} [2024-06-03 19:31:18,585 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 307 predicate places. [2024-06-03 19:31:18,585 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 630 transitions, 10254 flow [2024-06-03 19:31:18,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:18,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:18,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:18,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 19:31:18,585 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)] === [2024-06-03 19:31:18,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:18,586 INFO L85 PathProgramCache]: Analyzing trace with hash 421327213, now seen corresponding path program 8 times [2024-06-03 19:31:18,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:18,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485247801] [2024-06-03 19:31:18,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:18,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:19,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:19,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485247801] [2024-06-03 19:31:19,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485247801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:19,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:19,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:31:19,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416513287] [2024-06-03 19:31:19,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:19,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:31:19,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:19,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:31:19,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:31:19,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:31:19,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 630 transitions, 10254 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:19,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:19,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:31:19,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:21,567 INFO L124 PetriNetUnfolderBase]: 4464/6674 cut-off events. [2024-06-03 19:31:21,567 INFO L125 PetriNetUnfolderBase]: For 1403589/1403592 co-relation queries the response was YES. [2024-06-03 19:31:21,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85743 conditions, 6674 events. 4464/6674 cut-off events. For 1403589/1403592 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 35625 event pairs, 706 based on Foata normal form. 8/6672 useless extension candidates. Maximal degree in co-relation 85583. Up to 5622 conditions per place. [2024-06-03 19:31:21,673 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 436 selfloop transitions, 236 changer transitions 0/676 dead transitions. [2024-06-03 19:31:21,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 676 transitions, 12908 flow [2024-06-03 19:31:21,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:31:21,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:31:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-03 19:31:21,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-03 19:31:21,674 INFO L175 Difference]: Start difference. First operand has 352 places, 630 transitions, 10254 flow. Second operand 11 states and 214 transitions. [2024-06-03 19:31:21,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 676 transitions, 12908 flow [2024-06-03 19:31:24,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 676 transitions, 12477 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-03 19:31:24,715 INFO L231 Difference]: Finished difference. Result has 354 places, 636 transitions, 10798 flow [2024-06-03 19:31:24,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9823, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10798, PETRI_PLACES=354, PETRI_TRANSITIONS=636} [2024-06-03 19:31:24,715 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 309 predicate places. [2024-06-03 19:31:24,715 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 636 transitions, 10798 flow [2024-06-03 19:31:24,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:24,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:24,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:24,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 19:31:24,716 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)] === [2024-06-03 19:31:24,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:24,716 INFO L85 PathProgramCache]: Analyzing trace with hash 412120864, now seen corresponding path program 16 times [2024-06-03 19:31:24,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:24,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629532622] [2024-06-03 19:31:24,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:24,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:25,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:25,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629532622] [2024-06-03 19:31:25,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629532622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:25,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:25,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:31:25,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084992966] [2024-06-03 19:31:25,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:25,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:31:25,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:25,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:31:25,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:31:25,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:31:25,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 636 transitions, 10798 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:25,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:25,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:31:25,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:27,614 INFO L124 PetriNetUnfolderBase]: 4496/6718 cut-off events. [2024-06-03 19:31:27,614 INFO L125 PetriNetUnfolderBase]: For 1449149/1449152 co-relation queries the response was YES. [2024-06-03 19:31:27,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87391 conditions, 6718 events. 4496/6718 cut-off events. For 1449149/1449152 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 35826 event pairs, 714 based on Foata normal form. 8/6715 useless extension candidates. Maximal degree in co-relation 87230. Up to 5414 conditions per place. [2024-06-03 19:31:27,722 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 435 selfloop transitions, 240 changer transitions 0/679 dead transitions. [2024-06-03 19:31:27,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 679 transitions, 12963 flow [2024-06-03 19:31:27,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:31:27,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:31:27,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-03 19:31:27,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-03 19:31:27,723 INFO L175 Difference]: Start difference. First operand has 354 places, 636 transitions, 10798 flow. Second operand 11 states and 214 transitions. [2024-06-03 19:31:27,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 679 transitions, 12963 flow [2024-06-03 19:31:31,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 679 transitions, 12366 flow, removed 150 selfloop flow, removed 7 redundant places. [2024-06-03 19:31:31,398 INFO L231 Difference]: Finished difference. Result has 358 places, 641 transitions, 11017 flow [2024-06-03 19:31:31,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10201, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11017, PETRI_PLACES=358, PETRI_TRANSITIONS=641} [2024-06-03 19:31:31,399 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 313 predicate places. [2024-06-03 19:31:31,399 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 641 transitions, 11017 flow [2024-06-03 19:31:31,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:31,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:31,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:31,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 19:31:31,399 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:31:31,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:31,400 INFO L85 PathProgramCache]: Analyzing trace with hash 412380334, now seen corresponding path program 17 times [2024-06-03 19:31:31,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:31,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866488218] [2024-06-03 19:31:31,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:31,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:32,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:32,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866488218] [2024-06-03 19:31:32,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866488218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:32,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:32,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:31:32,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654579468] [2024-06-03 19:31:32,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:32,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:31:32,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:32,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:31:32,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:31:32,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:31:32,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 641 transitions, 11017 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:32,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:32,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:31:32,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:34,524 INFO L124 PetriNetUnfolderBase]: 4512/6754 cut-off events. [2024-06-03 19:31:34,524 INFO L125 PetriNetUnfolderBase]: For 1459609/1459612 co-relation queries the response was YES. [2024-06-03 19:31:34,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88579 conditions, 6754 events. 4512/6754 cut-off events. For 1459609/1459612 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 36215 event pairs, 699 based on Foata normal form. 5/6748 useless extension candidates. Maximal degree in co-relation 88416. Up to 5678 conditions per place. [2024-06-03 19:31:34,624 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 487 selfloop transitions, 196 changer transitions 0/687 dead transitions. [2024-06-03 19:31:34,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 687 transitions, 13453 flow [2024-06-03 19:31:34,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:31:34,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:31:34,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-03 19:31:34,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-03 19:31:34,625 INFO L175 Difference]: Start difference. First operand has 358 places, 641 transitions, 11017 flow. Second operand 10 states and 197 transitions. [2024-06-03 19:31:34,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 687 transitions, 13453 flow [2024-06-03 19:31:37,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 687 transitions, 12420 flow, removed 278 selfloop flow, removed 9 redundant places. [2024-06-03 19:31:37,534 INFO L231 Difference]: Finished difference. Result has 361 places, 650 transitions, 11004 flow [2024-06-03 19:31:37,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10241, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11004, PETRI_PLACES=361, PETRI_TRANSITIONS=650} [2024-06-03 19:31:37,535 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 316 predicate places. [2024-06-03 19:31:37,535 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 650 transitions, 11004 flow [2024-06-03 19:31:37,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:37,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:37,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:37,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 19:31:37,535 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:31:37,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:37,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1482580747, now seen corresponding path program 9 times [2024-06-03 19:31:37,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:37,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451671059] [2024-06-03 19:31:37,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:37,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:38,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:38,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451671059] [2024-06-03 19:31:38,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451671059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:38,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:38,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:31:38,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796083103] [2024-06-03 19:31:38,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:38,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:31:38,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:38,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:31:38,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:31:38,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:31:38,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 650 transitions, 11004 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:38,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:38,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:31:38,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:40,798 INFO L124 PetriNetUnfolderBase]: 4499/6721 cut-off events. [2024-06-03 19:31:40,798 INFO L125 PetriNetUnfolderBase]: For 1463095/1463098 co-relation queries the response was YES. [2024-06-03 19:31:40,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87489 conditions, 6721 events. 4499/6721 cut-off events. For 1463095/1463098 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 35822 event pairs, 705 based on Foata normal form. 8/6719 useless extension candidates. Maximal degree in co-relation 87323. Up to 5689 conditions per place. [2024-06-03 19:31:40,903 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 459 selfloop transitions, 217 changer transitions 0/680 dead transitions. [2024-06-03 19:31:40,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 680 transitions, 12844 flow [2024-06-03 19:31:40,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:31:40,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:31:40,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-03 19:31:40,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-03 19:31:40,904 INFO L175 Difference]: Start difference. First operand has 361 places, 650 transitions, 11004 flow. Second operand 9 states and 177 transitions. [2024-06-03 19:31:40,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 680 transitions, 12844 flow [2024-06-03 19:31:43,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 680 transitions, 12114 flow, removed 235 selfloop flow, removed 5 redundant places. [2024-06-03 19:31:43,994 INFO L231 Difference]: Finished difference. Result has 365 places, 650 transitions, 10718 flow [2024-06-03 19:31:43,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10274, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10718, PETRI_PLACES=365, PETRI_TRANSITIONS=650} [2024-06-03 19:31:43,994 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 320 predicate places. [2024-06-03 19:31:43,994 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 650 transitions, 10718 flow [2024-06-03 19:31:43,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:43,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:43,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:43,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 19:31:43,995 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:31:43,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:43,995 INFO L85 PathProgramCache]: Analyzing trace with hash 737131033, now seen corresponding path program 10 times [2024-06-03 19:31:43,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:43,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468453916] [2024-06-03 19:31:43,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:43,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:45,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:45,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468453916] [2024-06-03 19:31:45,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468453916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:45,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:45,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:31:45,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778961114] [2024-06-03 19:31:45,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:45,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:31:45,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:45,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:31:45,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:31:45,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:31:45,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 650 transitions, 10718 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:45,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:45,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:31:45,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:47,077 INFO L124 PetriNetUnfolderBase]: 4537/6779 cut-off events. [2024-06-03 19:31:47,077 INFO L125 PetriNetUnfolderBase]: For 1510247/1510250 co-relation queries the response was YES. [2024-06-03 19:31:47,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88435 conditions, 6779 events. 4537/6779 cut-off events. For 1510247/1510250 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 36260 event pairs, 650 based on Foata normal form. 8/6777 useless extension candidates. Maximal degree in co-relation 88268. Up to 5233 conditions per place. [2024-06-03 19:31:47,184 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 409 selfloop transitions, 280 changer transitions 0/693 dead transitions. [2024-06-03 19:31:47,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 693 transitions, 13454 flow [2024-06-03 19:31:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:31:47,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:31:47,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-03 19:31:47,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-03 19:31:47,185 INFO L175 Difference]: Start difference. First operand has 365 places, 650 transitions, 10718 flow. Second operand 10 states and 196 transitions. [2024-06-03 19:31:47,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 693 transitions, 13454 flow [2024-06-03 19:31:50,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 693 transitions, 13118 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:31:50,698 INFO L231 Difference]: Finished difference. Result has 368 places, 656 transitions, 11472 flow [2024-06-03 19:31:50,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10382, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11472, PETRI_PLACES=368, PETRI_TRANSITIONS=656} [2024-06-03 19:31:50,698 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 323 predicate places. [2024-06-03 19:31:50,698 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 656 transitions, 11472 flow [2024-06-03 19:31:50,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:50,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:50,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:50,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 19:31:50,699 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)] === [2024-06-03 19:31:50,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:50,699 INFO L85 PathProgramCache]: Analyzing trace with hash 726079564, now seen corresponding path program 18 times [2024-06-03 19:31:50,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:50,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649349397] [2024-06-03 19:31:50,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:50,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:51,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:51,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649349397] [2024-06-03 19:31:51,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649349397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:51,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:51,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:31:51,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415329129] [2024-06-03 19:31:51,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:51,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:31:51,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:51,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:31:51,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:31:51,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:31:51,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 656 transitions, 11472 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:51,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:51,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:31:51,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:53,592 INFO L124 PetriNetUnfolderBase]: 4537/6788 cut-off events. [2024-06-03 19:31:53,592 INFO L125 PetriNetUnfolderBase]: For 1523519/1523522 co-relation queries the response was YES. [2024-06-03 19:31:53,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89441 conditions, 6788 events. 4537/6788 cut-off events. For 1523519/1523522 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 36415 event pairs, 706 based on Foata normal form. 5/6782 useless extension candidates. Maximal degree in co-relation 89273. Up to 5247 conditions per place. [2024-06-03 19:31:53,702 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 381 selfloop transitions, 315 changer transitions 0/700 dead transitions. [2024-06-03 19:31:53,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 700 transitions, 13689 flow [2024-06-03 19:31:53,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:31:53,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:31:53,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-03 19:31:53,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-03 19:31:53,703 INFO L175 Difference]: Start difference. First operand has 368 places, 656 transitions, 11472 flow. Second operand 10 states and 196 transitions. [2024-06-03 19:31:53,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 700 transitions, 13689 flow [2024-06-03 19:31:58,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 700 transitions, 13080 flow, removed 156 selfloop flow, removed 6 redundant places. [2024-06-03 19:31:58,300 INFO L231 Difference]: Finished difference. Result has 373 places, 663 transitions, 11988 flow [2024-06-03 19:31:58,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10867, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11988, PETRI_PLACES=373, PETRI_TRANSITIONS=663} [2024-06-03 19:31:58,301 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 328 predicate places. [2024-06-03 19:31:58,301 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 663 transitions, 11988 flow [2024-06-03 19:31:58,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:58,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:58,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:58,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 19:31:58,301 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:31:58,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:58,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1180581782, now seen corresponding path program 2 times [2024-06-03 19:31:58,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:58,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587450050] [2024-06-03 19:31:58,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:58,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:59,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:59,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587450050] [2024-06-03 19:31:59,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587450050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:59,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:59,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:31:59,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548327085] [2024-06-03 19:31:59,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:59,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:31:59,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:59,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:31:59,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:31:59,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:31:59,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 663 transitions, 11988 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:59,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:59,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:31:59,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:01,145 INFO L124 PetriNetUnfolderBase]: 4289/6537 cut-off events. [2024-06-03 19:32:01,145 INFO L125 PetriNetUnfolderBase]: For 1514158/1514164 co-relation queries the response was YES. [2024-06-03 19:32:01,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87838 conditions, 6537 events. 4289/6537 cut-off events. For 1514158/1514164 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 36137 event pairs, 712 based on Foata normal form. 5/6537 useless extension candidates. Maximal degree in co-relation 87667. Up to 5905 conditions per place. [2024-06-03 19:32:01,263 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 563 selfloop transitions, 44 changer transitions 0/676 dead transitions. [2024-06-03 19:32:01,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 676 transitions, 13464 flow [2024-06-03 19:32:01,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:01,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:32:01,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39204545454545453 [2024-06-03 19:32:01,264 INFO L175 Difference]: Start difference. First operand has 373 places, 663 transitions, 11988 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:32:01,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 676 transitions, 13464 flow [2024-06-03 19:32:05,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 676 transitions, 12676 flow, removed 152 selfloop flow, removed 7 redundant places. [2024-06-03 19:32:05,169 INFO L231 Difference]: Finished difference. Result has 374 places, 666 transitions, 11338 flow [2024-06-03 19:32:05,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11200, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11338, PETRI_PLACES=374, PETRI_TRANSITIONS=666} [2024-06-03 19:32:05,170 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 329 predicate places. [2024-06-03 19:32:05,170 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 666 transitions, 11338 flow [2024-06-03 19:32:05,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:05,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:05,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:05,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 19:32:05,170 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:05,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:05,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1822093210, now seen corresponding path program 3 times [2024-06-03 19:32:05,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:05,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072118814] [2024-06-03 19:32:05,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:05,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:06,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:06,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072118814] [2024-06-03 19:32:06,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072118814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:06,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:06,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:06,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041341755] [2024-06-03 19:32:06,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:06,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:06,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:06,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:06,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:06,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:32:06,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 666 transitions, 11338 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:06,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:06,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:32:06,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:07,919 INFO L124 PetriNetUnfolderBase]: 4286/6528 cut-off events. [2024-06-03 19:32:07,920 INFO L125 PetriNetUnfolderBase]: For 1525771/1525777 co-relation queries the response was YES. [2024-06-03 19:32:07,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86356 conditions, 6528 events. 4286/6528 cut-off events. For 1525771/1525777 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 36006 event pairs, 712 based on Foata normal form. 5/6528 useless extension candidates. Maximal degree in co-relation 86184. Up to 5902 conditions per place. [2024-06-03 19:32:08,026 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 566 selfloop transitions, 41 changer transitions 0/676 dead transitions. [2024-06-03 19:32:08,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 676 transitions, 12772 flow [2024-06-03 19:32:08,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:08,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:08,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 19:32:08,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39488636363636365 [2024-06-03 19:32:08,027 INFO L175 Difference]: Start difference. First operand has 374 places, 666 transitions, 11338 flow. Second operand 8 states and 139 transitions. [2024-06-03 19:32:08,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 676 transitions, 12772 flow [2024-06-03 19:32:12,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 676 transitions, 12605 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-03 19:32:12,117 INFO L231 Difference]: Finished difference. Result has 375 places, 666 transitions, 11259 flow [2024-06-03 19:32:12,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11171, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11259, PETRI_PLACES=375, PETRI_TRANSITIONS=666} [2024-06-03 19:32:12,117 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 330 predicate places. [2024-06-03 19:32:12,118 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 666 transitions, 11259 flow [2024-06-03 19:32:12,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:12,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:12,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:12,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 19:32:12,118 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:12,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:12,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1822092776, now seen corresponding path program 3 times [2024-06-03 19:32:12,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:12,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620760590] [2024-06-03 19:32:12,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:12,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:12,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:12,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620760590] [2024-06-03 19:32:12,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620760590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:12,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:12,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:12,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146666254] [2024-06-03 19:32:12,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:12,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:12,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:12,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:12,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:13,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:32:13,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 666 transitions, 11259 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:13,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:13,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:32:13,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:14,843 INFO L124 PetriNetUnfolderBase]: 4536/6778 cut-off events. [2024-06-03 19:32:14,844 INFO L125 PetriNetUnfolderBase]: For 1561767/1561770 co-relation queries the response was YES. [2024-06-03 19:32:14,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89316 conditions, 6778 events. 4536/6778 cut-off events. For 1561767/1561770 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 36192 event pairs, 715 based on Foata normal form. 3/6771 useless extension candidates. Maximal degree in co-relation 89145. Up to 6560 conditions per place. [2024-06-03 19:32:14,950 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 616 selfloop transitions, 56 changer transitions 0/676 dead transitions. [2024-06-03 19:32:14,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 676 transitions, 12825 flow [2024-06-03 19:32:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:14,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:14,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 19:32:14,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778409090909091 [2024-06-03 19:32:14,953 INFO L175 Difference]: Start difference. First operand has 375 places, 666 transitions, 11259 flow. Second operand 8 states and 133 transitions. [2024-06-03 19:32:14,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 676 transitions, 12825 flow [2024-06-03 19:32:18,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 676 transitions, 12728 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:18,190 INFO L231 Difference]: Finished difference. Result has 377 places, 666 transitions, 11280 flow [2024-06-03 19:32:18,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11162, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11280, PETRI_PLACES=377, PETRI_TRANSITIONS=666} [2024-06-03 19:32:18,191 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 332 predicate places. [2024-06-03 19:32:18,191 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 666 transitions, 11280 flow [2024-06-03 19:32:18,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:18,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:18,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:18,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 19:32:18,191 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:18,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:18,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1050016784, now seen corresponding path program 4 times [2024-06-03 19:32:18,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:18,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64135644] [2024-06-03 19:32:18,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:18,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:18,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:18,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64135644] [2024-06-03 19:32:18,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64135644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:18,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:18,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:18,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039367509] [2024-06-03 19:32:18,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:18,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:18,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:18,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:18,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:18,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:32:18,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 666 transitions, 11280 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:18,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:18,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:32:18,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:20,748 INFO L124 PetriNetUnfolderBase]: 4546/6792 cut-off events. [2024-06-03 19:32:20,749 INFO L125 PetriNetUnfolderBase]: For 1591205/1591207 co-relation queries the response was YES. [2024-06-03 19:32:20,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89872 conditions, 6792 events. 4546/6792 cut-off events. For 1591205/1591207 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 36359 event pairs, 724 based on Foata normal form. 3/6793 useless extension candidates. Maximal degree in co-relation 89700. Up to 6572 conditions per place. [2024-06-03 19:32:20,859 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 628 selfloop transitions, 64 changer transitions 0/696 dead transitions. [2024-06-03 19:32:20,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 696 transitions, 13093 flow [2024-06-03 19:32:20,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:20,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:20,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:32:20,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-03 19:32:20,860 INFO L175 Difference]: Start difference. First operand has 377 places, 666 transitions, 11280 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:32:20,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 696 transitions, 13093 flow [2024-06-03 19:32:25,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 696 transitions, 12957 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 19:32:25,110 INFO L231 Difference]: Finished difference. Result has 378 places, 672 transitions, 11440 flow [2024-06-03 19:32:25,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11152, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11440, PETRI_PLACES=378, PETRI_TRANSITIONS=672} [2024-06-03 19:32:25,110 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 333 predicate places. [2024-06-03 19:32:25,110 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 672 transitions, 11440 flow [2024-06-03 19:32:25,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:25,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:25,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:25,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 19:32:25,111 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:25,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:25,111 INFO L85 PathProgramCache]: Analyzing trace with hash 861306521, now seen corresponding path program 11 times [2024-06-03 19:32:25,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:25,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83556899] [2024-06-03 19:32:25,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:25,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:26,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:26,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83556899] [2024-06-03 19:32:26,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83556899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:26,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:26,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:32:26,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758869515] [2024-06-03 19:32:26,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:26,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:32:26,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:26,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:32:26,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:32:26,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:32:26,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 672 transitions, 11440 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:26,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:26,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:32:26,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:28,344 INFO L124 PetriNetUnfolderBase]: 4844/7226 cut-off events. [2024-06-03 19:32:28,344 INFO L125 PetriNetUnfolderBase]: For 1646796/1646796 co-relation queries the response was YES. [2024-06-03 19:32:28,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94387 conditions, 7226 events. 4844/7226 cut-off events. For 1646796/1646796 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 38984 event pairs, 701 based on Foata normal form. 6/7230 useless extension candidates. Maximal degree in co-relation 94214. Up to 6403 conditions per place. [2024-06-03 19:32:28,469 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 587 selfloop transitions, 196 changer transitions 0/787 dead transitions. [2024-06-03 19:32:28,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 787 transitions, 15039 flow [2024-06-03 19:32:28,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:32:28,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:32:28,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-03 19:32:28,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359504132231405 [2024-06-03 19:32:28,470 INFO L175 Difference]: Start difference. First operand has 378 places, 672 transitions, 11440 flow. Second operand 11 states and 211 transitions. [2024-06-03 19:32:28,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 787 transitions, 15039 flow [2024-06-03 19:32:34,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 787 transitions, 14731 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:34,332 INFO L231 Difference]: Finished difference. Result has 387 places, 741 transitions, 13281 flow [2024-06-03 19:32:34,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11144, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13281, PETRI_PLACES=387, PETRI_TRANSITIONS=741} [2024-06-03 19:32:34,333 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 342 predicate places. [2024-06-03 19:32:34,333 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 741 transitions, 13281 flow [2024-06-03 19:32:34,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:34,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:34,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:34,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 19:32:34,333 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:34,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:34,333 INFO L85 PathProgramCache]: Analyzing trace with hash -606212796, now seen corresponding path program 5 times [2024-06-03 19:32:34,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:34,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255231817] [2024-06-03 19:32:34,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:34,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:35,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:35,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255231817] [2024-06-03 19:32:35,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255231817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:35,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:35,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:35,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42963059] [2024-06-03 19:32:35,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:35,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:35,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:35,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:35,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:35,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:32:35,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 741 transitions, 13281 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:35,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:35,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:32:35,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:37,166 INFO L124 PetriNetUnfolderBase]: 4854/7240 cut-off events. [2024-06-03 19:32:37,166 INFO L125 PetriNetUnfolderBase]: For 1649985/1649987 co-relation queries the response was YES. [2024-06-03 19:32:37,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96224 conditions, 7240 events. 4854/7240 cut-off events. For 1649985/1649987 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 39118 event pairs, 706 based on Foata normal form. 3/7241 useless extension candidates. Maximal degree in co-relation 96046. Up to 7018 conditions per place. [2024-06-03 19:32:37,287 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 692 selfloop transitions, 73 changer transitions 0/769 dead transitions. [2024-06-03 19:32:37,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 769 transitions, 15240 flow [2024-06-03 19:32:37,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:37,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:37,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:32:37,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-03 19:32:37,288 INFO L175 Difference]: Start difference. First operand has 387 places, 741 transitions, 13281 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:32:37,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 769 transitions, 15240 flow [2024-06-03 19:32:42,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 769 transitions, 14663 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:42,699 INFO L231 Difference]: Finished difference. Result has 389 places, 747 transitions, 13025 flow [2024-06-03 19:32:42,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12714, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13025, PETRI_PLACES=389, PETRI_TRANSITIONS=747} [2024-06-03 19:32:42,699 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 344 predicate places. [2024-06-03 19:32:42,699 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 747 transitions, 13025 flow [2024-06-03 19:32:42,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:42,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:42,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:42,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 19:32:42,699 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:42,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:42,700 INFO L85 PathProgramCache]: Analyzing trace with hash -41024392, now seen corresponding path program 4 times [2024-06-03 19:32:42,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:42,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025300483] [2024-06-03 19:32:42,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:42,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:43,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:43,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025300483] [2024-06-03 19:32:43,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025300483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:43,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:43,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:43,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234451555] [2024-06-03 19:32:43,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:43,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:43,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:43,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:43,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:43,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:32:43,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 747 transitions, 13025 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:43,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:43,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:32:43,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:45,506 INFO L124 PetriNetUnfolderBase]: 4580/6967 cut-off events. [2024-06-03 19:32:45,506 INFO L125 PetriNetUnfolderBase]: For 1655223/1655225 co-relation queries the response was YES. [2024-06-03 19:32:45,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91411 conditions, 6967 events. 4580/6967 cut-off events. For 1655223/1655225 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 38813 event pairs, 750 based on Foata normal form. 3/6968 useless extension candidates. Maximal degree in co-relation 91233. Up to 6253 conditions per place. [2024-06-03 19:32:45,625 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 634 selfloop transitions, 46 changer transitions 0/769 dead transitions. [2024-06-03 19:32:45,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 769 transitions, 14469 flow [2024-06-03 19:32:45,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:45,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:32:45,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-03 19:32:45,626 INFO L175 Difference]: Start difference. First operand has 389 places, 747 transitions, 13025 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:32:45,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 769 transitions, 14469 flow [2024-06-03 19:32:50,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 769 transitions, 14293 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 19:32:50,197 INFO L231 Difference]: Finished difference. Result has 392 places, 751 transitions, 12979 flow [2024-06-03 19:32:50,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12849, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12979, PETRI_PLACES=392, PETRI_TRANSITIONS=751} [2024-06-03 19:32:50,197 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 347 predicate places. [2024-06-03 19:32:50,197 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 751 transitions, 12979 flow [2024-06-03 19:32:50,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:50,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:50,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:50,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 19:32:50,197 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:50,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:50,198 INFO L85 PathProgramCache]: Analyzing trace with hash -76110936, now seen corresponding path program 6 times [2024-06-03 19:32:50,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:50,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885452668] [2024-06-03 19:32:50,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:50,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:50,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:50,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885452668] [2024-06-03 19:32:50,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885452668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:50,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:50,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:50,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768726640] [2024-06-03 19:32:50,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:50,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:50,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:50,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:50,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:51,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:32:51,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 751 transitions, 12979 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:51,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:51,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:32:51,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:53,036 INFO L124 PetriNetUnfolderBase]: 4853/7239 cut-off events. [2024-06-03 19:32:53,036 INFO L125 PetriNetUnfolderBase]: For 1682125/1682125 co-relation queries the response was YES. [2024-06-03 19:32:53,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94734 conditions, 7239 events. 4853/7239 cut-off events. For 1682125/1682125 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 39018 event pairs, 708 based on Foata normal form. 1/7238 useless extension candidates. Maximal degree in co-relation 94555. Up to 7018 conditions per place. [2024-06-03 19:32:53,162 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 690 selfloop transitions, 75 changer transitions 0/769 dead transitions. [2024-06-03 19:32:53,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 769 transitions, 14565 flow [2024-06-03 19:32:53,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:53,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:53,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:32:53,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-03 19:32:53,163 INFO L175 Difference]: Start difference. First operand has 392 places, 751 transitions, 12979 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:32:53,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 769 transitions, 14565 flow [2024-06-03 19:32:58,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 769 transitions, 14488 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 19:32:58,367 INFO L231 Difference]: Finished difference. Result has 396 places, 751 transitions, 13062 flow [2024-06-03 19:32:58,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12902, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13062, PETRI_PLACES=396, PETRI_TRANSITIONS=751} [2024-06-03 19:32:58,368 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 351 predicate places. [2024-06-03 19:32:58,368 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 751 transitions, 13062 flow [2024-06-03 19:32:58,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:58,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:58,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:58,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 19:32:58,368 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:58,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:58,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1645207706, now seen corresponding path program 1 times [2024-06-03 19:32:58,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:58,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41060914] [2024-06-03 19:32:58,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:58,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:59,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:59,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41060914] [2024-06-03 19:32:59,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41060914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:59,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:59,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:59,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575068947] [2024-06-03 19:32:59,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:59,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:59,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:59,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:59,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:59,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:32:59,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 751 transitions, 13062 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:59,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:59,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:32:59,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:00,984 INFO L124 PetriNetUnfolderBase]: 4390/6798 cut-off events. [2024-06-03 19:33:00,984 INFO L125 PetriNetUnfolderBase]: For 1512050/1512050 co-relation queries the response was YES. [2024-06-03 19:33:01,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86297 conditions, 6798 events. 4390/6798 cut-off events. For 1512050/1512050 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 38832 event pairs, 809 based on Foata normal form. 4/6796 useless extension candidates. Maximal degree in co-relation 86116. Up to 5928 conditions per place. [2024-06-03 19:33:01,109 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 652 selfloop transitions, 29 changer transitions 0/777 dead transitions. [2024-06-03 19:33:01,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 777 transitions, 14816 flow [2024-06-03 19:33:01,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:33:01,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:33:01,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-03 19:33:01,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-03 19:33:01,110 INFO L175 Difference]: Start difference. First operand has 396 places, 751 transitions, 13062 flow. Second operand 7 states and 141 transitions. [2024-06-03 19:33:01,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 777 transitions, 14816 flow [2024-06-03 19:33:05,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 777 transitions, 14609 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 19:33:05,952 INFO L231 Difference]: Finished difference. Result has 396 places, 761 transitions, 13055 flow [2024-06-03 19:33:05,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12855, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13055, PETRI_PLACES=396, PETRI_TRANSITIONS=761} [2024-06-03 19:33:05,953 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 351 predicate places. [2024-06-03 19:33:05,953 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 761 transitions, 13055 flow [2024-06-03 19:33:05,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:05,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:05,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:05,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 19:33:05,953 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:05,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:05,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1180589718, now seen corresponding path program 2 times [2024-06-03 19:33:05,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:05,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669707804] [2024-06-03 19:33:05,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:05,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:06,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:06,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669707804] [2024-06-03 19:33:06,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669707804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:06,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:06,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:33:06,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937735290] [2024-06-03 19:33:06,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:06,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:33:06,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:06,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:33:06,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:33:06,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:33:06,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 761 transitions, 13055 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:06,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:06,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:33:06,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:08,596 INFO L124 PetriNetUnfolderBase]: 4383/6792 cut-off events. [2024-06-03 19:33:08,596 INFO L125 PetriNetUnfolderBase]: For 1520007/1520007 co-relation queries the response was YES. [2024-06-03 19:33:08,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86822 conditions, 6792 events. 4383/6792 cut-off events. For 1520007/1520007 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 38809 event pairs, 809 based on Foata normal form. 2/6788 useless extension candidates. Maximal degree in co-relation 86639. Up to 5998 conditions per place. [2024-06-03 19:33:08,722 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 660 selfloop transitions, 18 changer transitions 0/774 dead transitions. [2024-06-03 19:33:08,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 774 transitions, 14499 flow [2024-06-03 19:33:08,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:08,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:08,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 19:33:08,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005681818181818 [2024-06-03 19:33:08,723 INFO L175 Difference]: Start difference. First operand has 396 places, 761 transitions, 13055 flow. Second operand 8 states and 141 transitions. [2024-06-03 19:33:08,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 774 transitions, 14499 flow [2024-06-03 19:33:13,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 774 transitions, 14433 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-03 19:33:13,351 INFO L231 Difference]: Finished difference. Result has 402 places, 764 transitions, 13096 flow [2024-06-03 19:33:13,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12989, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13096, PETRI_PLACES=402, PETRI_TRANSITIONS=764} [2024-06-03 19:33:13,352 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 357 predicate places. [2024-06-03 19:33:13,352 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 764 transitions, 13096 flow [2024-06-03 19:33:13,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:13,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:13,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:13,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 19:33:13,352 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:13,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:13,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1822339226, now seen corresponding path program 3 times [2024-06-03 19:33:13,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:13,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479865154] [2024-06-03 19:33:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:13,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:14,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:14,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:14,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479865154] [2024-06-03 19:33:14,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479865154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:14,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:14,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:33:14,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857797919] [2024-06-03 19:33:14,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:14,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:33:14,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:14,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:33:14,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:33:14,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:33:14,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 764 transitions, 13096 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:14,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:14,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:33:14,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:15,891 INFO L124 PetriNetUnfolderBase]: 4383/6792 cut-off events. [2024-06-03 19:33:15,891 INFO L125 PetriNetUnfolderBase]: For 1537488/1537488 co-relation queries the response was YES. [2024-06-03 19:33:15,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86948 conditions, 6792 events. 4383/6792 cut-off events. For 1537488/1537488 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 38825 event pairs, 806 based on Foata normal form. 2/6788 useless extension candidates. Maximal degree in co-relation 86762. Up to 5985 conditions per place. [2024-06-03 19:33:16,011 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 660 selfloop transitions, 22 changer transitions 0/778 dead transitions. [2024-06-03 19:33:16,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 778 transitions, 14558 flow [2024-06-03 19:33:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:33:16,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:33:16,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-03 19:33:16,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:33:16,012 INFO L175 Difference]: Start difference. First operand has 402 places, 764 transitions, 13096 flow. Second operand 7 states and 132 transitions. [2024-06-03 19:33:16,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 778 transitions, 14558 flow [2024-06-03 19:33:21,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 778 transitions, 14474 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 19:33:21,684 INFO L231 Difference]: Finished difference. Result has 403 places, 767 transitions, 13132 flow [2024-06-03 19:33:21,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13012, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=742, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13132, PETRI_PLACES=403, PETRI_TRANSITIONS=767} [2024-06-03 19:33:21,685 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 358 predicate places. [2024-06-03 19:33:21,685 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 767 transitions, 13132 flow [2024-06-03 19:33:21,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:21,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:21,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:21,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 19:33:21,685 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:21,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:21,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1374587816, now seen corresponding path program 1 times [2024-06-03 19:33:21,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:21,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584849857] [2024-06-03 19:33:21,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:21,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:22,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:22,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584849857] [2024-06-03 19:33:22,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584849857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:22,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:22,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:33:22,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452524238] [2024-06-03 19:33:22,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:22,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:33:22,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:22,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:33:22,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:33:22,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:33:22,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 767 transitions, 13132 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:22,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:22,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:33:22,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:25,071 INFO L124 PetriNetUnfolderBase]: 4766/7185 cut-off events. [2024-06-03 19:33:25,071 INFO L125 PetriNetUnfolderBase]: For 1834468/1834470 co-relation queries the response was YES. [2024-06-03 19:33:25,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96100 conditions, 7185 events. 4766/7185 cut-off events. For 1834468/1834470 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 39591 event pairs, 530 based on Foata normal form. 6/7189 useless extension candidates. Maximal degree in co-relation 95914. Up to 6306 conditions per place. [2024-06-03 19:33:25,406 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 599 selfloop transitions, 45 changer transitions 0/811 dead transitions. [2024-06-03 19:33:25,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 811 transitions, 14728 flow [2024-06-03 19:33:25,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:33:25,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:33:25,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-03 19:33:25,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-03 19:33:25,408 INFO L175 Difference]: Start difference. First operand has 403 places, 767 transitions, 13132 flow. Second operand 10 states and 195 transitions. [2024-06-03 19:33:25,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 811 transitions, 14728 flow [2024-06-03 19:33:30,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 811 transitions, 14634 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-03 19:33:30,329 INFO L231 Difference]: Finished difference. Result has 408 places, 769 transitions, 13307 flow [2024-06-03 19:33:30,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13038, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=722, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13307, PETRI_PLACES=408, PETRI_TRANSITIONS=769} [2024-06-03 19:33:30,330 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 363 predicate places. [2024-06-03 19:33:30,330 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 769 transitions, 13307 flow [2024-06-03 19:33:30,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:30,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:30,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:30,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 19:33:30,330 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)] === [2024-06-03 19:33:30,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:30,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1377444776, now seen corresponding path program 2 times [2024-06-03 19:33:30,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:30,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366494316] [2024-06-03 19:33:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:30,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:31,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:31,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366494316] [2024-06-03 19:33:31,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366494316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:31,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:31,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:33:31,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207465854] [2024-06-03 19:33:31,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:31,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:33:31,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:31,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:33:31,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:33:31,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:33:31,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 769 transitions, 13307 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:31,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:31,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:33:31,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:33,786 INFO L124 PetriNetUnfolderBase]: 4783/7212 cut-off events. [2024-06-03 19:33:33,786 INFO L125 PetriNetUnfolderBase]: For 1877464/1877466 co-relation queries the response was YES. [2024-06-03 19:33:33,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97053 conditions, 7212 events. 4783/7212 cut-off events. For 1877464/1877466 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 39833 event pairs, 653 based on Foata normal form. 6/7216 useless extension candidates. Maximal degree in co-relation 96866. Up to 6359 conditions per place. [2024-06-03 19:33:33,918 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 599 selfloop transitions, 46 changer transitions 0/812 dead transitions. [2024-06-03 19:33:33,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 812 transitions, 14907 flow [2024-06-03 19:33:33,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:33:33,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:33:33,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-03 19:33:33,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-03 19:33:33,919 INFO L175 Difference]: Start difference. First operand has 408 places, 769 transitions, 13307 flow. Second operand 10 states and 195 transitions. [2024-06-03 19:33:33,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 812 transitions, 14907 flow [2024-06-03 19:33:38,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 812 transitions, 14656 flow, removed 82 selfloop flow, removed 8 redundant places. [2024-06-03 19:33:38,434 INFO L231 Difference]: Finished difference. Result has 410 places, 771 transitions, 13331 flow [2024-06-03 19:33:38,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13056, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=723, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13331, PETRI_PLACES=410, PETRI_TRANSITIONS=771} [2024-06-03 19:33:38,434 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 365 predicate places. [2024-06-03 19:33:38,434 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 771 transitions, 13331 flow [2024-06-03 19:33:38,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:38,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:38,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:38,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 19:33:38,435 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)] === [2024-06-03 19:33:38,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:38,435 INFO L85 PathProgramCache]: Analyzing trace with hash -736464236, now seen corresponding path program 1 times [2024-06-03 19:33:38,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:38,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973273018] [2024-06-03 19:33:38,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:38,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:39,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:39,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973273018] [2024-06-03 19:33:39,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973273018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:39,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:39,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:33:39,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567715453] [2024-06-03 19:33:39,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:39,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:33:39,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:39,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:33:39,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:33:39,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:33:39,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 771 transitions, 13331 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:39,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:39,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:33:39,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:42,212 INFO L124 PetriNetUnfolderBase]: 4957/7399 cut-off events. [2024-06-03 19:33:42,212 INFO L125 PetriNetUnfolderBase]: For 1925564/1925566 co-relation queries the response was YES. [2024-06-03 19:33:42,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99188 conditions, 7399 events. 4957/7399 cut-off events. For 1925564/1925566 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 40224 event pairs, 673 based on Foata normal form. 5/7402 useless extension candidates. Maximal degree in co-relation 99000. Up to 7043 conditions per place. [2024-06-03 19:33:42,345 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 724 selfloop transitions, 94 changer transitions 0/822 dead transitions. [2024-06-03 19:33:42,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 822 transitions, 16087 flow [2024-06-03 19:33:42,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:33:42,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:33:42,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-03 19:33:42,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-03 19:33:42,346 INFO L175 Difference]: Start difference. First operand has 410 places, 771 transitions, 13331 flow. Second operand 11 states and 214 transitions. [2024-06-03 19:33:42,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 822 transitions, 16087 flow [2024-06-03 19:33:47,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 822 transitions, 15830 flow, removed 84 selfloop flow, removed 8 redundant places. [2024-06-03 19:33:47,749 INFO L231 Difference]: Finished difference. Result has 413 places, 775 transitions, 13595 flow [2024-06-03 19:33:47,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13074, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13595, PETRI_PLACES=413, PETRI_TRANSITIONS=775} [2024-06-03 19:33:47,749 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 368 predicate places. [2024-06-03 19:33:47,749 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 775 transitions, 13595 flow [2024-06-03 19:33:47,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:47,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:47,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:47,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 19:33:47,750 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)] === [2024-06-03 19:33:47,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:47,750 INFO L85 PathProgramCache]: Analyzing trace with hash -621772672, now seen corresponding path program 3 times [2024-06-03 19:33:47,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:47,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230602789] [2024-06-03 19:33:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:47,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:48,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:48,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230602789] [2024-06-03 19:33:48,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230602789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:48,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:48,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:33:48,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725991234] [2024-06-03 19:33:48,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:48,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:33:48,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:48,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:33:48,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:33:48,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:33:48,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 775 transitions, 13595 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:48,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:48,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:33:48,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:51,213 INFO L124 PetriNetUnfolderBase]: 4818/7268 cut-off events. [2024-06-03 19:33:51,213 INFO L125 PetriNetUnfolderBase]: For 1970865/1970867 co-relation queries the response was YES. [2024-06-03 19:33:51,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98700 conditions, 7268 events. 4818/7268 cut-off events. For 1970865/1970867 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 40192 event pairs, 628 based on Foata normal form. 6/7272 useless extension candidates. Maximal degree in co-relation 98511. Up to 6415 conditions per place. [2024-06-03 19:33:51,345 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 603 selfloop transitions, 46 changer transitions 0/817 dead transitions. [2024-06-03 19:33:51,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 817 transitions, 15217 flow [2024-06-03 19:33:51,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:33:51,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:33:51,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-03 19:33:51,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-03 19:33:51,346 INFO L175 Difference]: Start difference. First operand has 413 places, 775 transitions, 13595 flow. Second operand 10 states and 192 transitions. [2024-06-03 19:33:51,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 817 transitions, 15217 flow [2024-06-03 19:33:57,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 817 transitions, 14726 flow, removed 154 selfloop flow, removed 9 redundant places. [2024-06-03 19:33:57,533 INFO L231 Difference]: Finished difference. Result has 415 places, 779 transitions, 13409 flow [2024-06-03 19:33:57,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13104, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=730, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13409, PETRI_PLACES=415, PETRI_TRANSITIONS=779} [2024-06-03 19:33:57,534 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 370 predicate places. [2024-06-03 19:33:57,534 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 779 transitions, 13409 flow [2024-06-03 19:33:57,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:57,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:57,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:57,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 19:33:57,534 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:57,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:57,535 INFO L85 PathProgramCache]: Analyzing trace with hash -621587974, now seen corresponding path program 1 times [2024-06-03 19:33:57,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:57,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251105420] [2024-06-03 19:33:57,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:57,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:58,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:58,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251105420] [2024-06-03 19:33:58,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251105420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:58,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:58,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:33:58,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778173052] [2024-06-03 19:33:58,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:58,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:33:58,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:58,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:33:58,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:33:58,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:33:58,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 779 transitions, 13409 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:58,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:58,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:33:58,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:01,351 INFO L124 PetriNetUnfolderBase]: 5126/7667 cut-off events. [2024-06-03 19:34:01,352 INFO L125 PetriNetUnfolderBase]: For 2264492/2264494 co-relation queries the response was YES. [2024-06-03 19:34:01,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104679 conditions, 7667 events. 5126/7667 cut-off events. For 2264492/2264494 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 42240 event pairs, 682 based on Foata normal form. 38/7703 useless extension candidates. Maximal degree in co-relation 104488. Up to 7079 conditions per place. [2024-06-03 19:34:01,494 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 723 selfloop transitions, 103 changer transitions 0/830 dead transitions. [2024-06-03 19:34:01,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 830 transitions, 16017 flow [2024-06-03 19:34:01,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:34:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:34:01,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-03 19:34:01,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44834710743801653 [2024-06-03 19:34:01,496 INFO L175 Difference]: Start difference. First operand has 415 places, 779 transitions, 13409 flow. Second operand 11 states and 217 transitions. [2024-06-03 19:34:01,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 830 transitions, 16017 flow [2024-06-03 19:34:07,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 830 transitions, 15752 flow, removed 89 selfloop flow, removed 7 redundant places. [2024-06-03 19:34:07,322 INFO L231 Difference]: Finished difference. Result has 419 places, 782 transitions, 13623 flow [2024-06-03 19:34:07,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13144, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13623, PETRI_PLACES=419, PETRI_TRANSITIONS=782} [2024-06-03 19:34:07,323 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 374 predicate places. [2024-06-03 19:34:07,323 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 782 transitions, 13623 flow [2024-06-03 19:34:07,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:07,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:07,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:07,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 19:34:07,323 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:34:07,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:07,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1238265636, now seen corresponding path program 2 times [2024-06-03 19:34:07,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:07,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728845836] [2024-06-03 19:34:07,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:07,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:08,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:08,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728845836] [2024-06-03 19:34:08,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728845836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:08,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:08,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:34:08,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669885301] [2024-06-03 19:34:08,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:08,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:34:08,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:08,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:34:08,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:34:08,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:34:08,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 782 transitions, 13623 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:08,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:08,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:34:08,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:11,494 INFO L124 PetriNetUnfolderBase]: 5144/7706 cut-off events. [2024-06-03 19:34:11,494 INFO L125 PetriNetUnfolderBase]: For 2131986/2131988 co-relation queries the response was YES. [2024-06-03 19:34:11,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105781 conditions, 7706 events. 5144/7706 cut-off events. For 2131986/2131988 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 42615 event pairs, 681 based on Foata normal form. 5/7709 useless extension candidates. Maximal degree in co-relation 105589. Up to 7228 conditions per place. [2024-06-03 19:34:11,616 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 710 selfloop transitions, 123 changer transitions 0/837 dead transitions. [2024-06-03 19:34:11,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 837 transitions, 16455 flow [2024-06-03 19:34:11,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:34:11,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:34:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 234 transitions. [2024-06-03 19:34:11,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-03 19:34:11,617 INFO L175 Difference]: Start difference. First operand has 419 places, 782 transitions, 13623 flow. Second operand 12 states and 234 transitions. [2024-06-03 19:34:11,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 837 transitions, 16455 flow [2024-06-03 19:34:16,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 837 transitions, 16168 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-03 19:34:16,110 INFO L231 Difference]: Finished difference. Result has 422 places, 786 transitions, 13929 flow [2024-06-03 19:34:16,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13336, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13929, PETRI_PLACES=422, PETRI_TRANSITIONS=786} [2024-06-03 19:34:16,110 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 377 predicate places. [2024-06-03 19:34:16,110 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 786 transitions, 13929 flow [2024-06-03 19:34:16,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:16,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:16,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:16,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 19:34:16,110 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:34:16,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:16,111 INFO L85 PathProgramCache]: Analyzing trace with hash -455538892, now seen corresponding path program 4 times [2024-06-03 19:34:16,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:16,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399727765] [2024-06-03 19:34:16,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:16,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:17,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:17,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399727765] [2024-06-03 19:34:17,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399727765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:17,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:17,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:34:17,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413661093] [2024-06-03 19:34:17,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:17,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:34:17,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:17,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:34:17,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:34:17,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:34:17,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 786 transitions, 13929 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:17,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:17,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:34:17,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:19,694 INFO L124 PetriNetUnfolderBase]: 4985/7549 cut-off events. [2024-06-03 19:34:19,694 INFO L125 PetriNetUnfolderBase]: For 2132846/2132848 co-relation queries the response was YES. [2024-06-03 19:34:19,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103838 conditions, 7549 events. 4985/7549 cut-off events. For 2132846/2132848 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 42489 event pairs, 630 based on Foata normal form. 6/7553 useless extension candidates. Maximal degree in co-relation 103645. Up to 6598 conditions per place. [2024-06-03 19:34:19,841 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 594 selfloop transitions, 62 changer transitions 0/826 dead transitions. [2024-06-03 19:34:19,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 826 transitions, 15567 flow [2024-06-03 19:34:19,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:34:19,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:34:19,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-03 19:34:19,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-03 19:34:19,842 INFO L175 Difference]: Start difference. First operand has 422 places, 786 transitions, 13929 flow. Second operand 10 states and 192 transitions. [2024-06-03 19:34:19,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 826 transitions, 15567 flow [2024-06-03 19:34:25,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 826 transitions, 15004 flow, removed 161 selfloop flow, removed 10 redundant places. [2024-06-03 19:34:25,218 INFO L231 Difference]: Finished difference. Result has 423 places, 790 transitions, 13716 flow [2024-06-03 19:34:25,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13366, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13716, PETRI_PLACES=423, PETRI_TRANSITIONS=790} [2024-06-03 19:34:25,219 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 378 predicate places. [2024-06-03 19:34:25,219 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 790 transitions, 13716 flow [2024-06-03 19:34:25,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:25,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:25,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:25,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 19:34:25,219 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:34:25,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:25,220 INFO L85 PathProgramCache]: Analyzing trace with hash -449098084, now seen corresponding path program 2 times [2024-06-03 19:34:25,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:25,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183657454] [2024-06-03 19:34:25,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:25,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:26,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:26,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183657454] [2024-06-03 19:34:26,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183657454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:26,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:26,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:34:26,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969766124] [2024-06-03 19:34:26,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:26,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:34:26,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:26,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:34:26,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:34:26,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:34:26,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 790 transitions, 13716 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:26,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:26,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:34:26,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:29,222 INFO L124 PetriNetUnfolderBase]: 5313/7973 cut-off events. [2024-06-03 19:34:29,222 INFO L125 PetriNetUnfolderBase]: For 2440707/2440709 co-relation queries the response was YES. [2024-06-03 19:34:29,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110631 conditions, 7973 events. 5313/7973 cut-off events. For 2440707/2440709 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 44452 event pairs, 678 based on Foata normal form. 38/8009 useless extension candidates. Maximal degree in co-relation 110436. Up to 7087 conditions per place. [2024-06-03 19:34:29,382 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 698 selfloop transitions, 137 changer transitions 0/839 dead transitions. [2024-06-03 19:34:29,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 839 transitions, 16364 flow [2024-06-03 19:34:29,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:34:29,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:34:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-03 19:34:29,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45041322314049587 [2024-06-03 19:34:29,383 INFO L175 Difference]: Start difference. First operand has 423 places, 790 transitions, 13716 flow. Second operand 11 states and 218 transitions. [2024-06-03 19:34:29,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 839 transitions, 16364 flow [2024-06-03 19:34:34,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 839 transitions, 16059 flow, removed 93 selfloop flow, removed 7 redundant places. [2024-06-03 19:34:34,744 INFO L231 Difference]: Finished difference. Result has 427 places, 793 transitions, 13970 flow [2024-06-03 19:34:34,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13411, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13970, PETRI_PLACES=427, PETRI_TRANSITIONS=793} [2024-06-03 19:34:34,745 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 382 predicate places. [2024-06-03 19:34:34,745 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 793 transitions, 13970 flow [2024-06-03 19:34:34,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:34,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:34,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:34,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 19:34:34,745 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:34:34,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:34,746 INFO L85 PathProgramCache]: Analyzing trace with hash -764563334, now seen corresponding path program 3 times [2024-06-03 19:34:34,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:34,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119351237] [2024-06-03 19:34:34,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:34,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:36,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:36,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119351237] [2024-06-03 19:34:36,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119351237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:36,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:36,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:34:36,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616147383] [2024-06-03 19:34:36,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:36,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:34:36,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:36,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:34:36,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:34:36,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:34:36,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 793 transitions, 13970 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:36,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:36,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:34:36,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:38,970 INFO L124 PetriNetUnfolderBase]: 5331/8012 cut-off events. [2024-06-03 19:34:38,970 INFO L125 PetriNetUnfolderBase]: For 2291705/2291707 co-relation queries the response was YES. [2024-06-03 19:34:39,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111872 conditions, 8012 events. 5331/8012 cut-off events. For 2291705/2291707 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 44947 event pairs, 678 based on Foata normal form. 5/8015 useless extension candidates. Maximal degree in co-relation 111676. Up to 7249 conditions per place. [2024-06-03 19:34:39,141 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 683 selfloop transitions, 151 changer transitions 0/838 dead transitions. [2024-06-03 19:34:39,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 838 transitions, 16576 flow [2024-06-03 19:34:39,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:34:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:34:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-03 19:34:39,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44421487603305787 [2024-06-03 19:34:39,142 INFO L175 Difference]: Start difference. First operand has 427 places, 793 transitions, 13970 flow. Second operand 11 states and 215 transitions. [2024-06-03 19:34:39,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 838 transitions, 16576 flow [2024-06-03 19:34:44,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 838 transitions, 16213 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-06-03 19:34:44,799 INFO L231 Difference]: Finished difference. Result has 429 places, 797 transitions, 14270 flow [2024-06-03 19:34:44,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13607, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14270, PETRI_PLACES=429, PETRI_TRANSITIONS=797} [2024-06-03 19:34:44,799 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 384 predicate places. [2024-06-03 19:34:44,799 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 797 transitions, 14270 flow [2024-06-03 19:34:44,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:44,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:44,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:44,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 19:34:44,800 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:34:44,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:44,800 INFO L85 PathProgramCache]: Analyzing trace with hash -455360952, now seen corresponding path program 4 times [2024-06-03 19:34:44,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:44,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741965635] [2024-06-03 19:34:44,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:44,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:46,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:46,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741965635] [2024-06-03 19:34:46,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741965635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:46,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:46,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:34:46,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834643169] [2024-06-03 19:34:46,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:46,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:34:46,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:46,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:34:46,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:34:46,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:34:46,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 797 transitions, 14270 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:46,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:46,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:34:46,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:48,874 INFO L124 PetriNetUnfolderBase]: 5367/8067 cut-off events. [2024-06-03 19:34:48,874 INFO L125 PetriNetUnfolderBase]: For 2288846/2288848 co-relation queries the response was YES. [2024-06-03 19:34:48,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112059 conditions, 8067 events. 5367/8067 cut-off events. For 2288846/2288848 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 45311 event pairs, 673 based on Foata normal form. 5/8070 useless extension candidates. Maximal degree in co-relation 111862. Up to 7375 conditions per place. [2024-06-03 19:34:49,023 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 719 selfloop transitions, 124 changer transitions 0/847 dead transitions. [2024-06-03 19:34:49,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 847 transitions, 17045 flow [2024-06-03 19:34:49,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:34:49,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:34:49,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-03 19:34:49,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-03 19:34:49,024 INFO L175 Difference]: Start difference. First operand has 429 places, 797 transitions, 14270 flow. Second operand 11 states and 214 transitions. [2024-06-03 19:34:49,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 847 transitions, 17045 flow [2024-06-03 19:34:54,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 847 transitions, 16404 flow, removed 168 selfloop flow, removed 9 redundant places. [2024-06-03 19:34:54,910 INFO L231 Difference]: Finished difference. Result has 431 places, 805 transitions, 14153 flow [2024-06-03 19:34:54,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13637, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14153, PETRI_PLACES=431, PETRI_TRANSITIONS=805} [2024-06-03 19:34:54,911 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 386 predicate places. [2024-06-03 19:34:54,911 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 805 transitions, 14153 flow [2024-06-03 19:34:54,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:54,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:54,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:54,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 19:34:54,911 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:34:54,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:54,911 INFO L85 PathProgramCache]: Analyzing trace with hash -770819196, now seen corresponding path program 3 times [2024-06-03 19:34:54,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:54,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536629524] [2024-06-03 19:34:54,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:54,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:56,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:56,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536629524] [2024-06-03 19:34:56,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536629524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:56,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:56,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:34:56,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131450569] [2024-06-03 19:34:56,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:56,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:34:56,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:56,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:34:56,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:34:56,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:34:56,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 805 transitions, 14153 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:56,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:56,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:34:56,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:00,363 INFO L124 PetriNetUnfolderBase]: 5513/8307 cut-off events. [2024-06-03 19:35:00,363 INFO L125 PetriNetUnfolderBase]: For 2591886/2591888 co-relation queries the response was YES. [2024-06-03 19:35:00,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116350 conditions, 8307 events. 5513/8307 cut-off events. For 2591886/2591888 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 47175 event pairs, 697 based on Foata normal form. 41/8346 useless extension candidates. Maximal degree in co-relation 116152. Up to 7361 conditions per place. [2024-06-03 19:35:00,542 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 717 selfloop transitions, 134 changer transitions 0/855 dead transitions. [2024-06-03 19:35:00,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 855 transitions, 17093 flow [2024-06-03 19:35:00,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:35:00,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:35:00,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-03 19:35:00,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45661157024793386 [2024-06-03 19:35:00,543 INFO L175 Difference]: Start difference. First operand has 431 places, 805 transitions, 14153 flow. Second operand 11 states and 221 transitions. [2024-06-03 19:35:00,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 855 transitions, 17093 flow [2024-06-03 19:35:07,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 855 transitions, 16528 flow, removed 162 selfloop flow, removed 8 redundant places. [2024-06-03 19:35:07,525 INFO L231 Difference]: Finished difference. Result has 435 places, 808 transitions, 14173 flow [2024-06-03 19:35:07,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13588, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14173, PETRI_PLACES=435, PETRI_TRANSITIONS=808} [2024-06-03 19:35:07,526 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 390 predicate places. [2024-06-03 19:35:07,526 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 808 transitions, 14173 flow [2024-06-03 19:35:07,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:07,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:07,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:07,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 19:35:07,527 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:35:07,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:07,527 INFO L85 PathProgramCache]: Analyzing trace with hash -764324076, now seen corresponding path program 4 times [2024-06-03 19:35:07,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:07,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810198184] [2024-06-03 19:35:07,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:07,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:08,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:08,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810198184] [2024-06-03 19:35:08,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810198184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:08,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:08,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:35:08,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666634216] [2024-06-03 19:35:08,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:08,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:35:08,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:08,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:35:08,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:35:08,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:35:08,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 808 transitions, 14173 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:08,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:08,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:35:08,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:11,710 INFO L124 PetriNetUnfolderBase]: 5579/8407 cut-off events. [2024-06-03 19:35:11,710 INFO L125 PetriNetUnfolderBase]: For 2560012/2560014 co-relation queries the response was YES. [2024-06-03 19:35:11,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119642 conditions, 8407 events. 5579/8407 cut-off events. For 2560012/2560014 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 47963 event pairs, 671 based on Foata normal form. 8/8413 useless extension candidates. Maximal degree in co-relation 119442. Up to 7495 conditions per place. [2024-06-03 19:35:11,889 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 706 selfloop transitions, 155 changer transitions 0/865 dead transitions. [2024-06-03 19:35:11,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 865 transitions, 18069 flow [2024-06-03 19:35:11,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:35:11,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:35:11,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-03 19:35:11,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-03 19:35:11,890 INFO L175 Difference]: Start difference. First operand has 435 places, 808 transitions, 14173 flow. Second operand 11 states and 214 transitions. [2024-06-03 19:35:11,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 865 transitions, 18069 flow [2024-06-03 19:35:19,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 865 transitions, 17468 flow, removed 143 selfloop flow, removed 8 redundant places. [2024-06-03 19:35:19,109 INFO L231 Difference]: Finished difference. Result has 439 places, 820 transitions, 15070 flow [2024-06-03 19:35:19,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13674, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15070, PETRI_PLACES=439, PETRI_TRANSITIONS=820} [2024-06-03 19:35:19,109 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 394 predicate places. [2024-06-03 19:35:19,110 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 820 transitions, 15070 flow [2024-06-03 19:35:19,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:19,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:19,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:19,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 19:35:19,110 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:35:19,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:19,110 INFO L85 PathProgramCache]: Analyzing trace with hash -455354442, now seen corresponding path program 5 times [2024-06-03 19:35:19,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:19,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579220856] [2024-06-03 19:35:19,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:19,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:20,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:20,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579220856] [2024-06-03 19:35:20,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579220856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:20,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:20,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:35:20,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071612340] [2024-06-03 19:35:20,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:20,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:35:20,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:20,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:35:20,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:35:20,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:35:20,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 820 transitions, 15070 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:20,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:20,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:35:20,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:24,833 INFO L124 PetriNetUnfolderBase]: 5597/8443 cut-off events. [2024-06-03 19:35:24,833 INFO L125 PetriNetUnfolderBase]: For 2497917/2497919 co-relation queries the response was YES. [2024-06-03 19:35:25,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119590 conditions, 8443 events. 5597/8443 cut-off events. For 2497917/2497919 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 48252 event pairs, 697 based on Foata normal form. 5/8446 useless extension candidates. Maximal degree in co-relation 119388. Up to 7649 conditions per place. [2024-06-03 19:35:25,125 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 723 selfloop transitions, 147 changer transitions 0/874 dead transitions. [2024-06-03 19:35:25,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 874 transitions, 18280 flow [2024-06-03 19:35:25,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:35:25,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:35:25,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2024-06-03 19:35:25,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-03 19:35:25,126 INFO L175 Difference]: Start difference. First operand has 439 places, 820 transitions, 15070 flow. Second operand 12 states and 236 transitions. [2024-06-03 19:35:25,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 874 transitions, 18280 flow [2024-06-03 19:35:32,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 874 transitions, 17546 flow, removed 244 selfloop flow, removed 8 redundant places. [2024-06-03 19:35:32,396 INFO L231 Difference]: Finished difference. Result has 443 places, 824 transitions, 15007 flow [2024-06-03 19:35:32,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14336, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15007, PETRI_PLACES=443, PETRI_TRANSITIONS=824} [2024-06-03 19:35:32,397 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 398 predicate places. [2024-06-03 19:35:32,397 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 824 transitions, 15007 flow [2024-06-03 19:35:32,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:32,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:32,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:32,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 19:35:32,398 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)] === [2024-06-03 19:35:32,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:32,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1308580902, now seen corresponding path program 6 times [2024-06-03 19:35:32,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:32,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540095470] [2024-06-03 19:35:32,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:32,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:33,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:33,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540095470] [2024-06-03 19:35:33,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540095470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:33,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:33,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:35:33,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352058625] [2024-06-03 19:35:33,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:33,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:35:33,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:33,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:35:33,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:35:33,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:35:33,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 824 transitions, 15007 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:33,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:33,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:35:33,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:37,855 INFO L124 PetriNetUnfolderBase]: 5615/8477 cut-off events. [2024-06-03 19:35:37,855 INFO L125 PetriNetUnfolderBase]: For 2514031/2514033 co-relation queries the response was YES. [2024-06-03 19:35:38,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119680 conditions, 8477 events. 5615/8477 cut-off events. For 2514031/2514033 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 48525 event pairs, 705 based on Foata normal form. 5/8480 useless extension candidates. Maximal degree in co-relation 119477. Up to 7509 conditions per place. [2024-06-03 19:35:38,214 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 664 selfloop transitions, 201 changer transitions 0/869 dead transitions. [2024-06-03 19:35:38,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 869 transitions, 17719 flow [2024-06-03 19:35:38,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:35:38,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:35:38,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-03 19:35:38,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44421487603305787 [2024-06-03 19:35:38,216 INFO L175 Difference]: Start difference. First operand has 443 places, 824 transitions, 15007 flow. Second operand 11 states and 215 transitions. [2024-06-03 19:35:38,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 869 transitions, 17719 flow [2024-06-03 19:35:48,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 869 transitions, 17078 flow, removed 176 selfloop flow, removed 10 redundant places. [2024-06-03 19:35:48,768 INFO L231 Difference]: Finished difference. Result has 444 places, 828 transitions, 15153 flow [2024-06-03 19:35:48,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14366, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15153, PETRI_PLACES=444, PETRI_TRANSITIONS=828} [2024-06-03 19:35:48,769 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 399 predicate places. [2024-06-03 19:35:48,769 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 828 transitions, 15153 flow [2024-06-03 19:35:48,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:48,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:48,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:48,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 19:35:48,769 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:35:48,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:48,770 INFO L85 PathProgramCache]: Analyzing trace with hash -448867444, now seen corresponding path program 5 times [2024-06-03 19:35:48,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:48,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384512537] [2024-06-03 19:35:48,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:48,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:50,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:50,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384512537] [2024-06-03 19:35:50,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384512537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:50,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:50,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:35:50,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495238682] [2024-06-03 19:35:50,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:50,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:35:50,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:50,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:35:50,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:35:50,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:35:50,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 828 transitions, 15153 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:50,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:50,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:35:50,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:53,920 INFO L124 PetriNetUnfolderBase]: 5605/8463 cut-off events. [2024-06-03 19:35:53,920 INFO L125 PetriNetUnfolderBase]: For 2533872/2533874 co-relation queries the response was YES. [2024-06-03 19:35:54,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119119 conditions, 8463 events. 5605/8463 cut-off events. For 2533872/2533874 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 48514 event pairs, 697 based on Foata normal form. 8/8469 useless extension candidates. Maximal degree in co-relation 118915. Up to 7751 conditions per place. [2024-06-03 19:35:54,073 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 729 selfloop transitions, 137 changer transitions 0/870 dead transitions. [2024-06-03 19:35:54,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 870 transitions, 17505 flow [2024-06-03 19:35:54,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:35:54,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:35:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-03 19:35:54,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359504132231405 [2024-06-03 19:35:54,074 INFO L175 Difference]: Start difference. First operand has 444 places, 828 transitions, 15153 flow. Second operand 11 states and 211 transitions. [2024-06-03 19:35:54,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 870 transitions, 17505 flow [2024-06-03 19:36:00,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 870 transitions, 16206 flow, removed 451 selfloop flow, removed 9 redundant places. [2024-06-03 19:36:00,303 INFO L231 Difference]: Finished difference. Result has 446 places, 828 transitions, 14136 flow [2024-06-03 19:36:00,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13854, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14136, PETRI_PLACES=446, PETRI_TRANSITIONS=828} [2024-06-03 19:36:00,303 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 401 predicate places. [2024-06-03 19:36:00,303 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 828 transitions, 14136 flow [2024-06-03 19:36:00,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:00,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:00,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:00,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 19:36:00,304 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:36:00,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:00,304 INFO L85 PathProgramCache]: Analyzing trace with hash 716982757, now seen corresponding path program 1 times [2024-06-03 19:36:00,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:00,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860975041] [2024-06-03 19:36:00,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:00,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:01,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:01,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860975041] [2024-06-03 19:36:01,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860975041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:01,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:01,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:36:01,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22975078] [2024-06-03 19:36:01,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:01,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:36:01,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:01,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:36:01,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:36:01,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:36:01,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 828 transitions, 14136 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:01,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:01,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:36:01,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:03,875 INFO L124 PetriNetUnfolderBase]: 5329/8181 cut-off events. [2024-06-03 19:36:03,875 INFO L125 PetriNetUnfolderBase]: For 2494888/2494890 co-relation queries the response was YES. [2024-06-03 19:36:03,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113308 conditions, 8181 events. 5329/8181 cut-off events. For 2494888/2494890 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 48124 event pairs, 720 based on Foata normal form. 8/8174 useless extension candidates. Maximal degree in co-relation 113103. Up to 7350 conditions per place. [2024-06-03 19:36:04,031 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 711 selfloop transitions, 53 changer transitions 0/853 dead transitions. [2024-06-03 19:36:04,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 853 transitions, 16202 flow [2024-06-03 19:36:04,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:36:04,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:36:04,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-03 19:36:04,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-03 19:36:04,032 INFO L175 Difference]: Start difference. First operand has 446 places, 828 transitions, 14136 flow. Second operand 7 states and 137 transitions. [2024-06-03 19:36:04,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 853 transitions, 16202 flow [2024-06-03 19:36:11,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 853 transitions, 15906 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-03 19:36:11,742 INFO L231 Difference]: Finished difference. Result has 444 places, 835 transitions, 14206 flow [2024-06-03 19:36:11,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13840, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14206, PETRI_PLACES=444, PETRI_TRANSITIONS=835} [2024-06-03 19:36:11,743 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 399 predicate places. [2024-06-03 19:36:11,743 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 835 transitions, 14206 flow [2024-06-03 19:36:11,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:11,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:11,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:11,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 19:36:11,743 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:36:11,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:11,744 INFO L85 PathProgramCache]: Analyzing trace with hash 717132487, now seen corresponding path program 2 times [2024-06-03 19:36:11,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:11,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491789507] [2024-06-03 19:36:11,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:11,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:12,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:12,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491789507] [2024-06-03 19:36:12,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491789507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:12,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:12,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:36:12,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519046007] [2024-06-03 19:36:12,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:12,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:36:12,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:12,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:36:12,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:36:12,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:36:12,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 835 transitions, 14206 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:12,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:12,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:36:12,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:15,311 INFO L124 PetriNetUnfolderBase]: 5315/8157 cut-off events. [2024-06-03 19:36:15,311 INFO L125 PetriNetUnfolderBase]: For 2488943/2488946 co-relation queries the response was YES. [2024-06-03 19:36:15,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112887 conditions, 8157 events. 5315/8157 cut-off events. For 2488943/2488946 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 47926 event pairs, 697 based on Foata normal form. 4/8145 useless extension candidates. Maximal degree in co-relation 112681. Up to 7420 conditions per place. [2024-06-03 19:36:15,460 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 726 selfloop transitions, 35 changer transitions 0/850 dead transitions. [2024-06-03 19:36:15,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 850 transitions, 15862 flow [2024-06-03 19:36:15,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:36:15,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:36:15,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 19:36:15,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005681818181818 [2024-06-03 19:36:15,461 INFO L175 Difference]: Start difference. First operand has 444 places, 835 transitions, 14206 flow. Second operand 8 states and 141 transitions. [2024-06-03 19:36:15,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 850 transitions, 15862 flow [2024-06-03 19:36:23,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 850 transitions, 15746 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-03 19:36:23,139 INFO L231 Difference]: Finished difference. Result has 448 places, 838 transitions, 14273 flow [2024-06-03 19:36:23,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14092, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=835, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=800, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14273, PETRI_PLACES=448, PETRI_TRANSITIONS=838} [2024-06-03 19:36:23,139 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 403 predicate places. [2024-06-03 19:36:23,139 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 838 transitions, 14273 flow [2024-06-03 19:36:23,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:23,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:23,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:23,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 19:36:23,140 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)] === [2024-06-03 19:36:23,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:23,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1275903180, now seen corresponding path program 5 times [2024-06-03 19:36:23,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:23,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558727965] [2024-06-03 19:36:23,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:23,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:24,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:24,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558727965] [2024-06-03 19:36:24,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558727965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:24,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:24,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:36:24,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693225867] [2024-06-03 19:36:24,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:24,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:36:24,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:24,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:36:24,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:36:24,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:36:24,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 838 transitions, 14273 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:24,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:24,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:36:24,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:27,270 INFO L124 PetriNetUnfolderBase]: 5405/8263 cut-off events. [2024-06-03 19:36:27,270 INFO L125 PetriNetUnfolderBase]: For 2532679/2532679 co-relation queries the response was YES. [2024-06-03 19:36:27,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113635 conditions, 8263 events. 5405/8263 cut-off events. For 2532679/2532679 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 48201 event pairs, 640 based on Foata normal form. 4/8265 useless extension candidates. Maximal degree in co-relation 113428. Up to 7149 conditions per place. [2024-06-03 19:36:27,425 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 621 selfloop transitions, 69 changer transitions 0/876 dead transitions. [2024-06-03 19:36:27,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 876 transitions, 15992 flow [2024-06-03 19:36:27,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:36:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:36:27,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-03 19:36:27,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2024-06-03 19:36:27,426 INFO L175 Difference]: Start difference. First operand has 448 places, 838 transitions, 14273 flow. Second operand 10 states and 191 transitions. [2024-06-03 19:36:27,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 876 transitions, 15992 flow [2024-06-03 19:36:33,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 876 transitions, 15891 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 19:36:33,576 INFO L231 Difference]: Finished difference. Result has 453 places, 842 transitions, 14552 flow [2024-06-03 19:36:33,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14172, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=770, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14552, PETRI_PLACES=453, PETRI_TRANSITIONS=842} [2024-06-03 19:36:33,577 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 408 predicate places. [2024-06-03 19:36:33,577 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 842 transitions, 14552 flow [2024-06-03 19:36:33,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:33,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:33,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:33,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 19:36:33,578 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:36:33,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:33,578 INFO L85 PathProgramCache]: Analyzing trace with hash 2104928958, now seen corresponding path program 6 times [2024-06-03 19:36:33,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:33,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078381486] [2024-06-03 19:36:33,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:33,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:34,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:34,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078381486] [2024-06-03 19:36:34,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078381486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:34,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:34,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:36:34,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210268216] [2024-06-03 19:36:34,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:34,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:36:34,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:34,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:36:34,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:36:35,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:36:35,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 842 transitions, 14552 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:35,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:35,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:36:35,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:38,263 INFO L124 PetriNetUnfolderBase]: 5763/8727 cut-off events. [2024-06-03 19:36:38,264 INFO L125 PetriNetUnfolderBase]: For 2935633/2935633 co-relation queries the response was YES. [2024-06-03 19:36:38,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123012 conditions, 8727 events. 5763/8727 cut-off events. For 2935633/2935633 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 50451 event pairs, 696 based on Foata normal form. 36/8761 useless extension candidates. Maximal degree in co-relation 122803. Up to 7367 conditions per place. [2024-06-03 19:36:38,412 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 704 selfloop transitions, 183 changer transitions 0/891 dead transitions. [2024-06-03 19:36:38,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 891 transitions, 17641 flow [2024-06-03 19:36:38,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:36:38,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:36:38,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-03 19:36:38,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45661157024793386 [2024-06-03 19:36:38,414 INFO L175 Difference]: Start difference. First operand has 453 places, 842 transitions, 14552 flow. Second operand 11 states and 221 transitions. [2024-06-03 19:36:38,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 891 transitions, 17641 flow [2024-06-03 19:36:44,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 891 transitions, 17300 flow, removed 104 selfloop flow, removed 7 redundant places. [2024-06-03 19:36:44,897 INFO L231 Difference]: Finished difference. Result has 457 places, 845 transitions, 14892 flow [2024-06-03 19:36:44,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14211, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14892, PETRI_PLACES=457, PETRI_TRANSITIONS=845} [2024-06-03 19:36:44,898 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 412 predicate places. [2024-06-03 19:36:44,898 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 845 transitions, 14892 flow [2024-06-03 19:36:44,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:44,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:44,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:44,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 19:36:44,898 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)] === [2024-06-03 19:36:44,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:44,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1789463708, now seen corresponding path program 7 times [2024-06-03 19:36:44,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:44,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856859116] [2024-06-03 19:36:44,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:44,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:46,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:46,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856859116] [2024-06-03 19:36:46,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856859116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:46,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:46,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:36:46,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739344829] [2024-06-03 19:36:46,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:46,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:36:46,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:46,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:36:46,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:36:46,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:36:46,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 845 transitions, 14892 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:46,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:46,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:36:46,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:49,720 INFO L124 PetriNetUnfolderBase]: 5781/8751 cut-off events. [2024-06-03 19:36:49,720 INFO L125 PetriNetUnfolderBase]: For 2760384/2760384 co-relation queries the response was YES. [2024-06-03 19:36:49,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124498 conditions, 8751 events. 5781/8751 cut-off events. For 2760384/2760384 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 50670 event pairs, 696 based on Foata normal form. 3/8752 useless extension candidates. Maximal degree in co-relation 124288. Up to 7584 conditions per place. [2024-06-03 19:36:49,876 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 705 selfloop transitions, 185 changer transitions 0/894 dead transitions. [2024-06-03 19:36:49,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 894 transitions, 17959 flow [2024-06-03 19:36:49,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:36:49,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:36:49,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-03 19:36:49,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412878787878788 [2024-06-03 19:36:49,878 INFO L175 Difference]: Start difference. First operand has 457 places, 845 transitions, 14892 flow. Second operand 12 states and 233 transitions. [2024-06-03 19:36:49,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 894 transitions, 17959 flow [2024-06-03 19:36:57,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 894 transitions, 17486 flow, removed 57 selfloop flow, removed 9 redundant places. [2024-06-03 19:36:57,088 INFO L231 Difference]: Finished difference. Result has 461 places, 850 transitions, 15204 flow [2024-06-03 19:36:57,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14419, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15204, PETRI_PLACES=461, PETRI_TRANSITIONS=850} [2024-06-03 19:36:57,088 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 416 predicate places. [2024-06-03 19:36:57,089 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 850 transitions, 15204 flow [2024-06-03 19:36:57,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:57,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:57,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:57,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 19:36:57,089 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:36:57,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:57,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1789694596, now seen corresponding path program 7 times [2024-06-03 19:36:57,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:57,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788139855] [2024-06-03 19:36:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:57,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:58,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:58,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788139855] [2024-06-03 19:36:58,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788139855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:58,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:58,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:36:58,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546506998] [2024-06-03 19:36:58,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:58,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:36:58,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:58,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:36:58,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:36:58,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:36:58,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 850 transitions, 15204 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:58,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:58,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:36:58,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:01,646 INFO L124 PetriNetUnfolderBase]: 5809/8795 cut-off events. [2024-06-03 19:37:01,647 INFO L125 PetriNetUnfolderBase]: For 2776512/2776512 co-relation queries the response was YES. [2024-06-03 19:37:01,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124864 conditions, 8795 events. 5809/8795 cut-off events. For 2776512/2776512 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 50996 event pairs, 712 based on Foata normal form. 6/8799 useless extension candidates. Maximal degree in co-relation 124652. Up to 7737 conditions per place. [2024-06-03 19:37:01,807 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 719 selfloop transitions, 171 changer transitions 0/894 dead transitions. [2024-06-03 19:37:01,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 894 transitions, 18184 flow [2024-06-03 19:37:01,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:37:01,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:37:01,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-03 19:37:01,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44008264462809915 [2024-06-03 19:37:01,808 INFO L175 Difference]: Start difference. First operand has 461 places, 850 transitions, 15204 flow. Second operand 11 states and 213 transitions. [2024-06-03 19:37:01,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 894 transitions, 18184 flow [2024-06-03 19:37:08,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 894 transitions, 17441 flow, removed 190 selfloop flow, removed 9 redundant places. [2024-06-03 19:37:08,902 INFO L231 Difference]: Finished difference. Result has 463 places, 853 transitions, 15125 flow [2024-06-03 19:37:08,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14461, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15125, PETRI_PLACES=463, PETRI_TRANSITIONS=853} [2024-06-03 19:37:08,903 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 418 predicate places. [2024-06-03 19:37:08,903 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 853 transitions, 15125 flow [2024-06-03 19:37:08,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:08,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:08,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:08,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 19:37:08,903 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:37:08,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:08,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1783207598, now seen corresponding path program 8 times [2024-06-03 19:37:08,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:08,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249514303] [2024-06-03 19:37:08,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:08,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:10,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:10,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249514303] [2024-06-03 19:37:10,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249514303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:10,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:10,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:37:10,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673144350] [2024-06-03 19:37:10,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:10,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:37:10,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:10,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:37:10,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:37:10,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:37:10,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 853 transitions, 15125 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:10,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:10,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:37:10,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:13,846 INFO L124 PetriNetUnfolderBase]: 5845/8863 cut-off events. [2024-06-03 19:37:13,847 INFO L125 PetriNetUnfolderBase]: For 2799528/2799528 co-relation queries the response was YES. [2024-06-03 19:37:13,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125591 conditions, 8863 events. 5845/8863 cut-off events. For 2799528/2799528 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 51572 event pairs, 701 based on Foata normal form. 3/8864 useless extension candidates. Maximal degree in co-relation 125378. Up to 7665 conditions per place. [2024-06-03 19:37:14,125 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 715 selfloop transitions, 187 changer transitions 0/906 dead transitions. [2024-06-03 19:37:14,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 906 transitions, 18524 flow [2024-06-03 19:37:14,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:37:14,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:37:14,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-03 19:37:14,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412878787878788 [2024-06-03 19:37:14,126 INFO L175 Difference]: Start difference. First operand has 463 places, 853 transitions, 15125 flow. Second operand 12 states and 233 transitions. [2024-06-03 19:37:14,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 906 transitions, 18524 flow [2024-06-03 19:37:21,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 906 transitions, 17921 flow, removed 151 selfloop flow, removed 8 redundant places. [2024-06-03 19:37:21,745 INFO L231 Difference]: Finished difference. Result has 467 places, 861 transitions, 15342 flow [2024-06-03 19:37:21,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14522, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15342, PETRI_PLACES=467, PETRI_TRANSITIONS=861} [2024-06-03 19:37:21,746 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 422 predicate places. [2024-06-03 19:37:21,746 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 861 transitions, 15342 flow [2024-06-03 19:37:21,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:21,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:21,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:21,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 19:37:21,747 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:37:21,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:21,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1789694348, now seen corresponding path program 9 times [2024-06-03 19:37:21,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:21,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80198801] [2024-06-03 19:37:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:21,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:22,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:22,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:22,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80198801] [2024-06-03 19:37:22,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80198801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:22,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:22,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:37:22,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105672400] [2024-06-03 19:37:22,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:22,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:37:22,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:22,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:37:22,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:37:23,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:37:23,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 861 transitions, 15342 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:23,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:23,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:37:23,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:26,378 INFO L124 PetriNetUnfolderBase]: 5863/8897 cut-off events. [2024-06-03 19:37:26,378 INFO L125 PetriNetUnfolderBase]: For 2839152/2839152 co-relation queries the response was YES. [2024-06-03 19:37:26,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126554 conditions, 8897 events. 5863/8897 cut-off events. For 2839152/2839152 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 51921 event pairs, 702 based on Foata normal form. 3/8898 useless extension candidates. Maximal degree in co-relation 126340. Up to 7522 conditions per place. [2024-06-03 19:37:26,554 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 676 selfloop transitions, 225 changer transitions 0/905 dead transitions. [2024-06-03 19:37:26,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 905 transitions, 18448 flow [2024-06-03 19:37:26,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:37:26,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:37:26,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-03 19:37:26,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45041322314049587 [2024-06-03 19:37:26,555 INFO L175 Difference]: Start difference. First operand has 467 places, 861 transitions, 15342 flow. Second operand 11 states and 218 transitions. [2024-06-03 19:37:26,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 905 transitions, 18448 flow [2024-06-03 19:37:34,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 905 transitions, 17680 flow, removed 197 selfloop flow, removed 10 redundant places. [2024-06-03 19:37:34,601 INFO L231 Difference]: Finished difference. Result has 468 places, 865 transitions, 15443 flow [2024-06-03 19:37:34,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14574, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15443, PETRI_PLACES=468, PETRI_TRANSITIONS=865} [2024-06-03 19:37:34,601 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 423 predicate places. [2024-06-03 19:37:34,601 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 865 transitions, 15443 flow [2024-06-03 19:37:34,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:34,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:34,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:34,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 19:37:34,602 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:37:34,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:34,602 INFO L85 PathProgramCache]: Analyzing trace with hash 2011348006, now seen corresponding path program 8 times [2024-06-03 19:37:34,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:34,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84855083] [2024-06-03 19:37:34,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:34,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:35,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:35,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84855083] [2024-06-03 19:37:35,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84855083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:35,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:35,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:37:35,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974430378] [2024-06-03 19:37:35,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:35,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:37:35,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:35,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:37:35,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:37:35,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:37:35,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 865 transitions, 15443 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:35,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:35,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:37:35,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:39,186 INFO L124 PetriNetUnfolderBase]: 6004/9116 cut-off events. [2024-06-03 19:37:39,186 INFO L125 PetriNetUnfolderBase]: For 2990079/2990079 co-relation queries the response was YES. [2024-06-03 19:37:39,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130435 conditions, 9116 events. 6004/9116 cut-off events. For 2990079/2990079 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 53522 event pairs, 704 based on Foata normal form. 6/9120 useless extension candidates. Maximal degree in co-relation 130221. Up to 7905 conditions per place. [2024-06-03 19:37:39,354 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 711 selfloop transitions, 208 changer transitions 0/923 dead transitions. [2024-06-03 19:37:39,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 923 transitions, 19143 flow [2024-06-03 19:37:39,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:37:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:37:39,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-03 19:37:39,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44421487603305787 [2024-06-03 19:37:39,355 INFO L175 Difference]: Start difference. First operand has 468 places, 865 transitions, 15443 flow. Second operand 11 states and 215 transitions. [2024-06-03 19:37:39,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 923 transitions, 19143 flow [2024-06-03 19:37:47,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 923 transitions, 18304 flow, removed 197 selfloop flow, removed 9 redundant places. [2024-06-03 19:37:47,601 INFO L231 Difference]: Finished difference. Result has 471 places, 880 transitions, 15805 flow [2024-06-03 19:37:47,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14604, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15805, PETRI_PLACES=471, PETRI_TRANSITIONS=880} [2024-06-03 19:37:47,602 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 426 predicate places. [2024-06-03 19:37:47,602 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 880 transitions, 15805 flow [2024-06-03 19:37:47,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:47,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:47,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:47,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 19:37:47,602 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:37:47,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:47,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1789702966, now seen corresponding path program 9 times [2024-06-03 19:37:47,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:47,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917404752] [2024-06-03 19:37:47,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:47,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:48,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:48,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917404752] [2024-06-03 19:37:48,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917404752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:48,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:48,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:37:48,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534675887] [2024-06-03 19:37:48,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:48,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:37:48,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:48,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:37:48,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:37:48,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:37:48,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 880 transitions, 15805 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:48,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:48,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:37:48,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:52,246 INFO L124 PetriNetUnfolderBase]: 6070/9218 cut-off events. [2024-06-03 19:37:52,246 INFO L125 PetriNetUnfolderBase]: For 3113041/3113041 co-relation queries the response was YES. [2024-06-03 19:37:52,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133421 conditions, 9218 events. 6070/9218 cut-off events. For 3113041/3113041 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 54214 event pairs, 714 based on Foata normal form. 6/9222 useless extension candidates. Maximal degree in co-relation 133205. Up to 7944 conditions per place. [2024-06-03 19:37:52,407 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 742 selfloop transitions, 186 changer transitions 0/932 dead transitions. [2024-06-03 19:37:52,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 932 transitions, 19881 flow [2024-06-03 19:37:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:37:52,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:37:52,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-03 19:37:52,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4462809917355372 [2024-06-03 19:37:52,408 INFO L175 Difference]: Start difference. First operand has 471 places, 880 transitions, 15805 flow. Second operand 11 states and 216 transitions. [2024-06-03 19:37:52,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 932 transitions, 19881 flow [2024-06-03 19:38:01,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 932 transitions, 19223 flow, removed 191 selfloop flow, removed 7 redundant places. [2024-06-03 19:38:01,570 INFO L231 Difference]: Finished difference. Result has 476 places, 888 transitions, 16385 flow [2024-06-03 19:38:01,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15147, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=880, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16385, PETRI_PLACES=476, PETRI_TRANSITIONS=888} [2024-06-03 19:38:01,571 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 431 predicate places. [2024-06-03 19:38:01,571 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 888 transitions, 16385 flow [2024-06-03 19:38:01,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:01,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:01,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:01,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 19:38:01,571 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:01,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:01,571 INFO L85 PathProgramCache]: Analyzing trace with hash -82380476, now seen corresponding path program 10 times [2024-06-03 19:38:01,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:01,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533318379] [2024-06-03 19:38:01,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:01,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:02,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:02,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533318379] [2024-06-03 19:38:02,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533318379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:02,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:02,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:38:02,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534168557] [2024-06-03 19:38:02,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:02,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:38:02,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:02,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:38:02,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:38:02,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:38:02,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 888 transitions, 16385 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:02,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:02,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:38:02,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:06,479 INFO L124 PetriNetUnfolderBase]: 6184/9408 cut-off events. [2024-06-03 19:38:06,479 INFO L125 PetriNetUnfolderBase]: For 3414577/3414577 co-relation queries the response was YES. [2024-06-03 19:38:06,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137549 conditions, 9408 events. 6184/9408 cut-off events. For 3414577/3414577 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 55738 event pairs, 736 based on Foata normal form. 36/9442 useless extension candidates. Maximal degree in co-relation 137330. Up to 8003 conditions per place. [2024-06-03 19:38:06,654 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 745 selfloop transitions, 187 changer transitions 0/936 dead transitions. [2024-06-03 19:38:06,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 936 transitions, 19869 flow [2024-06-03 19:38:06,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:38:06,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:38:06,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-03 19:38:06,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-03 19:38:06,655 INFO L175 Difference]: Start difference. First operand has 476 places, 888 transitions, 16385 flow. Second operand 11 states and 220 transitions. [2024-06-03 19:38:06,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 936 transitions, 19869 flow