./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix033.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/mix033.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/mix033.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix033.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 19:35:03,235 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:35:03,300 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:35:03,303 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:35:03,304 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:35:03,343 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:35:03,344 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:35:03,364 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:35:03,365 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:35:03,365 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:35:03,365 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:35:03,366 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:35:03,366 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:35:03,366 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:35:03,367 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:35:03,367 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:35:03,367 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:35:03,367 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:35:03,368 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:35:03,368 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:35:03,368 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:35:03,369 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:35:03,369 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:35:03,369 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:35:03,369 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:35:03,369 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:35:03,370 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:35:03,370 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:35:03,370 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:35:03,370 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:35:03,371 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:35:03,371 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:35:03,371 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:35:03,372 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:35:03,372 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:35:03,372 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:35:03,372 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:35:03,372 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:35:03,373 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:35:03,373 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:35:03,373 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:35:03,373 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:35:03,373 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:35:03,374 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:35:03,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:35:03,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:35:03,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:35:03,643 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:35:03,643 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:35:03,644 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix033.opt.i [2024-06-03 19:35:04,742 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:35:04,942 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:35:04,943 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix033.opt.i [2024-06-03 19:35:04,960 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c3c3cdf2/d5ab9161a49f4635aeb9fa66ad18d7ab/FLAGcd89ab13f [2024-06-03 19:35:04,974 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c3c3cdf2/d5ab9161a49f4635aeb9fa66ad18d7ab [2024-06-03 19:35:04,977 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:35:04,977 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:35:04,978 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix033.opt.yml/witness.yml [2024-06-03 19:35:05,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:35:05,173 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:35:05,174 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:35:05,174 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:35:05,178 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:35:05,179 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:35:04" (1/2) ... [2024-06-03 19:35:05,180 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fba7c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:35:05, skipping insertion in model container [2024-06-03 19:35:05,180 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:35:04" (1/2) ... [2024-06-03 19:35:05,181 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3239169e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:35:05, skipping insertion in model container [2024-06-03 19:35:05,181 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:35:05" (2/2) ... [2024-06-03 19:35:05,182 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fba7c85 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:35:05, skipping insertion in model container [2024-06-03 19:35:05,182 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:35:05" (2/2) ... [2024-06-03 19:35:05,182 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:35:05,266 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:35:05,268 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] (((((((((((((((((((((! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-03 19:35:05,268 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((((! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-03 19:35:05,268 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((((! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-03 19:35:05,269 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:35:05,269 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-03 19:35:05,322 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:35:05,656 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:35:05,672 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:35:05,892 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:35:05,954 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:35:05,967 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:35:05 WrapperNode [2024-06-03 19:35:05,967 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:35:05,968 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:35:05,969 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:35:05,969 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:35:05,978 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 07:35:05" (1/1) ... [2024-06-03 19:35:06,022 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 07:35:05" (1/1) ... [2024-06-03 19:35:06,055 INFO L138 Inliner]: procedures = 175, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 135 [2024-06-03 19:35:06,062 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:35:06,063 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:35:06,066 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:35:06,066 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:35:06,075 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 07:35:05" (1/1) ... [2024-06-03 19:35:06,075 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 07:35:05" (1/1) ... [2024-06-03 19:35:06,086 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 07:35:05" (1/1) ... [2024-06-03 19:35:06,107 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 19:35:06,114 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 07:35:05" (1/1) ... [2024-06-03 19:35:06,115 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 07:35:05" (1/1) ... [2024-06-03 19:35:06,122 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 07:35:05" (1/1) ... [2024-06-03 19:35:06,123 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 07:35:05" (1/1) ... [2024-06-03 19:35:06,125 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 07:35:05" (1/1) ... [2024-06-03 19:35:06,126 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 07:35:05" (1/1) ... [2024-06-03 19:35:06,129 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:35:06,129 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:35:06,130 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:35:06,130 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:35:06,130 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 07:35:05" (1/1) ... [2024-06-03 19:35:06,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:35:06,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:35:06,174 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 19:35:06,202 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 19:35:06,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:35:06,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:35:06,239 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:35:06,239 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:35:06,239 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:35:06,239 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:35:06,239 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:35:06,239 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:35:06,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:35:06,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:35:06,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:35:06,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:35:06,241 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 19:35:06,401 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:35:06,403 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:35:06,673 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:35:06,673 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:35:06,780 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:35:06,781 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:35:06,781 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:35:06 BoogieIcfgContainer [2024-06-03 19:35:06,782 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:35:06,784 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:35:06,785 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:35:06,787 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:35:06,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:35:04" (1/4) ... [2024-06-03 19:35:06,788 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642cb3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:35:06, skipping insertion in model container [2024-06-03 19:35:06,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:35:05" (2/4) ... [2024-06-03 19:35:06,789 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642cb3d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:35:06, skipping insertion in model container [2024-06-03 19:35:06,789 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 07:35:05" (3/4) ... [2024-06-03 19:35:06,790 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642cb3d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:35:06, skipping insertion in model container [2024-06-03 19:35:06,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:35:06" (4/4) ... [2024-06-03 19:35:06,791 INFO L112 eAbstractionObserver]: Analyzing ICFG mix033.opt.i [2024-06-03 19:35:06,804 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:35:06,805 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 19:35:06,805 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:35:06,855 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:35:06,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 45 transitions, 102 flow [2024-06-03 19:35:06,915 INFO L124 PetriNetUnfolderBase]: 0/42 cut-off events. [2024-06-03 19:35:06,915 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:35:06,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 42 events. 0/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:35:06,918 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 45 transitions, 102 flow [2024-06-03 19:35:06,921 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 36 transitions, 81 flow [2024-06-03 19:35:06,932 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:35:06,971 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;@1dbd24f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:35:06,972 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 19:35:06,977 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:35:06,977 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:35:06,977 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:35:06,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:06,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:35:06,978 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 19:35:06,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:06,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1462142692, now seen corresponding path program 1 times [2024-06-03 19:35:06,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:06,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986575947] [2024-06-03 19:35:06,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:06,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:08,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:08,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986575947] [2024-06-03 19:35:08,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986575947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:08,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:08,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:35:08,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103162869] [2024-06-03 19:35:08,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:08,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:35:08,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:08,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:35:08,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:35:08,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-06-03 19:35:08,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:08,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:08,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-06-03 19:35:08,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:08,609 INFO L124 PetriNetUnfolderBase]: 1359/2190 cut-off events. [2024-06-03 19:35:08,609 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-03 19:35:08,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4306 conditions, 2190 events. 1359/2190 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11459 event pairs, 941 based on Foata normal form. 1/2096 useless extension candidates. Maximal degree in co-relation 4291. Up to 2029 conditions per place. [2024-06-03 19:35:08,627 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 34 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-03 19:35:08,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 183 flow [2024-06-03 19:35:08,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:35:08,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:35:08,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-06-03 19:35:08,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6148148148148148 [2024-06-03 19:35:08,639 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 81 flow. Second operand 3 states and 83 transitions. [2024-06-03 19:35:08,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 183 flow [2024-06-03 19:35:08,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 19:35:08,643 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 108 flow [2024-06-03 19:35:08,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-03 19:35:08,647 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2024-06-03 19:35:08,647 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 108 flow [2024-06-03 19:35:08,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:08,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:08,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:08,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:35:08,648 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 19:35:08,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:08,648 INFO L85 PathProgramCache]: Analyzing trace with hash -664792325, now seen corresponding path program 1 times [2024-06-03 19:35:08,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:08,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314431104] [2024-06-03 19:35:08,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:08,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:09,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:09,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314431104] [2024-06-03 19:35:09,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314431104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:09,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:09,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:35:09,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12480816] [2024-06-03 19:35:09,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:09,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:35:09,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:09,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:35:09,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:35:09,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-06-03 19:35:09,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:09,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:09,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-06-03 19:35:09,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:09,848 INFO L124 PetriNetUnfolderBase]: 1560/2438 cut-off events. [2024-06-03 19:35:09,848 INFO L125 PetriNetUnfolderBase]: For 455/455 co-relation queries the response was YES. [2024-06-03 19:35:09,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5456 conditions, 2438 events. 1560/2438 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12543 event pairs, 930 based on Foata normal form. 3/2403 useless extension candidates. Maximal degree in co-relation 5441. Up to 2302 conditions per place. [2024-06-03 19:35:09,861 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 42 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-03 19:35:09,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 56 transitions, 252 flow [2024-06-03 19:35:09,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:35:09,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:35:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-03 19:35:09,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-03 19:35:09,863 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 108 flow. Second operand 4 states and 104 transitions. [2024-06-03 19:35:09,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 56 transitions, 252 flow [2024-06-03 19:35:09,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 56 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:35:09,864 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 144 flow [2024-06-03 19:35:09,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-03 19:35:09,865 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2024-06-03 19:35:09,865 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 144 flow [2024-06-03 19:35:09,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:09,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:09,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:09,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:35:09,866 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 19:35:09,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:09,867 INFO L85 PathProgramCache]: Analyzing trace with hash 866275369, now seen corresponding path program 1 times [2024-06-03 19:35:09,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:09,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85533895] [2024-06-03 19:35:09,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:09,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:10,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:10,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85533895] [2024-06-03 19:35:10,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85533895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:10,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:10,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:35:10,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265630433] [2024-06-03 19:35:10,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:10,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:35:10,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:10,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:35:10,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:35:10,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-06-03 19:35:10,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:10,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:10,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-06-03 19:35:10,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:11,305 INFO L124 PetriNetUnfolderBase]: 1568/2498 cut-off events. [2024-06-03 19:35:11,305 INFO L125 PetriNetUnfolderBase]: For 1343/1343 co-relation queries the response was YES. [2024-06-03 19:35:11,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6133 conditions, 2498 events. 1568/2498 cut-off events. For 1343/1343 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13164 event pairs, 669 based on Foata normal form. 5/2482 useless extension candidates. Maximal degree in co-relation 6116. Up to 2248 conditions per place. [2024-06-03 19:35:11,318 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 55 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-03 19:35:11,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 78 transitions, 406 flow [2024-06-03 19:35:11,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:35:11,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:35:11,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-03 19:35:11,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 19:35:11,321 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 144 flow. Second operand 5 states and 135 transitions. [2024-06-03 19:35:11,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 78 transitions, 406 flow [2024-06-03 19:35:11,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 78 transitions, 392 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 19:35:11,324 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 243 flow [2024-06-03 19:35:11,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=243, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2024-06-03 19:35:11,325 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2024-06-03 19:35:11,325 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 243 flow [2024-06-03 19:35:11,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:11,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:11,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:11,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:35:11,326 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 19:35:11,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:11,326 INFO L85 PathProgramCache]: Analyzing trace with hash -732993944, now seen corresponding path program 1 times [2024-06-03 19:35:11,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:11,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070846270] [2024-06-03 19:35:11,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:11,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:12,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:12,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070846270] [2024-06-03 19:35:12,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070846270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:12,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:12,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:35:12,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474810043] [2024-06-03 19:35:12,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:12,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:35:12,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:12,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:35:12,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:35:12,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-06-03 19:35:12,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:12,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:12,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-06-03 19:35:12,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:12,904 INFO L124 PetriNetUnfolderBase]: 1580/2518 cut-off events. [2024-06-03 19:35:12,904 INFO L125 PetriNetUnfolderBase]: For 3183/3186 co-relation queries the response was YES. [2024-06-03 19:35:12,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7277 conditions, 2518 events. 1580/2518 cut-off events. For 3183/3186 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13269 event pairs, 481 based on Foata normal form. 12/2509 useless extension candidates. Maximal degree in co-relation 7257. Up to 2216 conditions per place. [2024-06-03 19:35:12,918 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 59 selfloop transitions, 19 changer transitions 0/85 dead transitions. [2024-06-03 19:35:12,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 85 transitions, 509 flow [2024-06-03 19:35:12,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:35:12,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:35:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-03 19:35:12,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-03 19:35:12,921 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 243 flow. Second operand 6 states and 155 transitions. [2024-06-03 19:35:12,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 85 transitions, 509 flow [2024-06-03 19:35:12,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 85 transitions, 501 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-03 19:35:12,928 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 299 flow [2024-06-03 19:35:12,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=299, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-03 19:35:12,929 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 13 predicate places. [2024-06-03 19:35:12,930 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 299 flow [2024-06-03 19:35:12,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:12,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:12,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:12,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:35:12,930 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 19:35:12,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:12,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1199250010, now seen corresponding path program 1 times [2024-06-03 19:35:12,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:12,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614453324] [2024-06-03 19:35:12,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:12,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:13,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:13,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614453324] [2024-06-03 19:35:13,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614453324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:13,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:13,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:35:13,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287612418] [2024-06-03 19:35:13,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:13,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:35:13,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:13,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:35:13,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:35:13,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-06-03 19:35:13,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 299 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 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 19:35:13,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:13,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-06-03 19:35:13,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:14,081 INFO L124 PetriNetUnfolderBase]: 1368/2247 cut-off events. [2024-06-03 19:35:14,081 INFO L125 PetriNetUnfolderBase]: For 4097/4097 co-relation queries the response was YES. [2024-06-03 19:35:14,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7019 conditions, 2247 events. 1368/2247 cut-off events. For 4097/4097 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 12074 event pairs, 562 based on Foata normal form. 2/2211 useless extension candidates. Maximal degree in co-relation 6996. Up to 2036 conditions per place. [2024-06-03 19:35:14,096 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 50 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-03 19:35:14,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 66 transitions, 443 flow [2024-06-03 19:35:14,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:35:14,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:35:14,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-03 19:35:14,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-06-03 19:35:14,099 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 299 flow. Second operand 5 states and 111 transitions. [2024-06-03 19:35:14,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 66 transitions, 443 flow [2024-06-03 19:35:14,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 66 transitions, 393 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 19:35:14,105 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 273 flow [2024-06-03 19:35:14,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-06-03 19:35:14,108 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2024-06-03 19:35:14,108 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 273 flow [2024-06-03 19:35:14,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 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 19:35:14,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:14,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:14,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:35:14,112 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 19:35:14,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:14,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1447483434, now seen corresponding path program 1 times [2024-06-03 19:35:14,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:14,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196462905] [2024-06-03 19:35:14,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:14,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:14,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:14,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196462905] [2024-06-03 19:35:14,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196462905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:14,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:14,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:35:14,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185217843] [2024-06-03 19:35:14,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:14,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:35:14,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:14,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:35:14,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:35:14,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:35:14,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 273 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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 19:35:14,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:14,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:35:14,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:15,519 INFO L124 PetriNetUnfolderBase]: 1606/2616 cut-off events. [2024-06-03 19:35:15,520 INFO L125 PetriNetUnfolderBase]: For 5550/5550 co-relation queries the response was YES. [2024-06-03 19:35:15,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8117 conditions, 2616 events. 1606/2616 cut-off events. For 5550/5550 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13993 event pairs, 676 based on Foata normal form. 2/2592 useless extension candidates. Maximal degree in co-relation 8092. Up to 2373 conditions per place. [2024-06-03 19:35:15,544 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 55 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-06-03 19:35:15,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 73 transitions, 461 flow [2024-06-03 19:35:15,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:35:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:35:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-03 19:35:15,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-03 19:35:15,545 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 273 flow. Second operand 6 states and 126 transitions. [2024-06-03 19:35:15,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 73 transitions, 461 flow [2024-06-03 19:35:15,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 73 transitions, 439 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 19:35:15,551 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 305 flow [2024-06-03 19:35:15,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-06-03 19:35:15,553 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 16 predicate places. [2024-06-03 19:35:15,554 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 305 flow [2024-06-03 19:35:15,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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 19:35:15,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:15,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:15,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:35:15,554 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 19:35:15,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:15,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1916593059, now seen corresponding path program 1 times [2024-06-03 19:35:15,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:15,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56932734] [2024-06-03 19:35:15,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:15,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:16,346 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 19:35:16,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:16,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56932734] [2024-06-03 19:35:16,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56932734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:16,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:16,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:35:16,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807158580] [2024-06-03 19:35:16,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:16,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:35:16,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:16,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:35:16,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:35:16,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:35:16,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 305 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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 19:35:16,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:16,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:35:16,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:17,298 INFO L124 PetriNetUnfolderBase]: 1746/2778 cut-off events. [2024-06-03 19:35:17,298 INFO L125 PetriNetUnfolderBase]: For 8538/8544 co-relation queries the response was YES. [2024-06-03 19:35:17,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9398 conditions, 2778 events. 1746/2778 cut-off events. For 8538/8544 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14653 event pairs, 726 based on Foata normal form. 8/2770 useless extension candidates. Maximal degree in co-relation 9373. Up to 2505 conditions per place. [2024-06-03 19:35:17,345 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 54 selfloop transitions, 19 changer transitions 0/81 dead transitions. [2024-06-03 19:35:17,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 81 transitions, 547 flow [2024-06-03 19:35:17,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:35:17,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:35:17,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-03 19:35:17,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:35:17,347 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 305 flow. Second operand 6 states and 135 transitions. [2024-06-03 19:35:17,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 81 transitions, 547 flow [2024-06-03 19:35:17,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 81 transitions, 517 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 19:35:17,353 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 347 flow [2024-06-03 19:35:17,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-03 19:35:17,354 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2024-06-03 19:35:17,354 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 347 flow [2024-06-03 19:35:17,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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 19:35:17,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:17,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:17,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:35:17,355 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 19:35:17,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:17,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1427987707, now seen corresponding path program 2 times [2024-06-03 19:35:17,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:17,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108352405] [2024-06-03 19:35:17,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:17,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:18,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:18,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108352405] [2024-06-03 19:35:18,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108352405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:18,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:18,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:35:18,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192534726] [2024-06-03 19:35:18,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:18,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:35:18,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:18,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:35:18,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:35:18,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:35:18,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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 19:35:18,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:18,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:35:18,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:18,939 INFO L124 PetriNetUnfolderBase]: 1734/2751 cut-off events. [2024-06-03 19:35:18,939 INFO L125 PetriNetUnfolderBase]: For 10319/10325 co-relation queries the response was YES. [2024-06-03 19:35:18,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9634 conditions, 2751 events. 1734/2751 cut-off events. For 10319/10325 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14473 event pairs, 740 based on Foata normal form. 3/2733 useless extension candidates. Maximal degree in co-relation 9608. Up to 2489 conditions per place. [2024-06-03 19:35:18,955 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 48 selfloop transitions, 20 changer transitions 0/76 dead transitions. [2024-06-03 19:35:18,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 76 transitions, 521 flow [2024-06-03 19:35:18,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:35:18,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:35:18,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-03 19:35:18,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48518518518518516 [2024-06-03 19:35:18,959 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 347 flow. Second operand 6 states and 131 transitions. [2024-06-03 19:35:18,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 76 transitions, 521 flow [2024-06-03 19:35:18,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 76 transitions, 492 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:35:18,965 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 366 flow [2024-06-03 19:35:18,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=366, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2024-06-03 19:35:18,967 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 21 predicate places. [2024-06-03 19:35:18,967 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 366 flow [2024-06-03 19:35:18,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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 19:35:18,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:18,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:18,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:35:18,968 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:35:18,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:18,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1922314915, now seen corresponding path program 1 times [2024-06-03 19:35:18,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:18,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981827634] [2024-06-03 19:35:18,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:18,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:19,860 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 19:35:19,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:19,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981827634] [2024-06-03 19:35:19,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981827634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:19,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:19,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:35:19,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250493601] [2024-06-03 19:35:19,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:19,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:35:19,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:19,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:35:19,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:35:20,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:35:20,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 366 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:20,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:20,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:35:20,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:20,932 INFO L124 PetriNetUnfolderBase]: 1590/2611 cut-off events. [2024-06-03 19:35:20,932 INFO L125 PetriNetUnfolderBase]: For 10273/10273 co-relation queries the response was YES. [2024-06-03 19:35:20,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9114 conditions, 2611 events. 1590/2611 cut-off events. For 10273/10273 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 14033 event pairs, 634 based on Foata normal form. 4/2601 useless extension candidates. Maximal degree in co-relation 9087. Up to 2330 conditions per place. [2024-06-03 19:35:20,947 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 63 selfloop transitions, 14 changer transitions 0/84 dead transitions. [2024-06-03 19:35:20,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 84 transitions, 592 flow [2024-06-03 19:35:20,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:35:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:35:20,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-03 19:35:20,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634920634920635 [2024-06-03 19:35:20,961 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 366 flow. Second operand 7 states and 146 transitions. [2024-06-03 19:35:20,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 84 transitions, 592 flow [2024-06-03 19:35:20,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 84 transitions, 527 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:35:20,984 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 365 flow [2024-06-03 19:35:20,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=365, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-06-03 19:35:20,986 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2024-06-03 19:35:20,986 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 365 flow [2024-06-03 19:35:20,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:20,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:20,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:20,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:35:20,986 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 19:35:20,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:20,986 INFO L85 PathProgramCache]: Analyzing trace with hash -715155925, now seen corresponding path program 1 times [2024-06-03 19:35:20,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:20,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690145049] [2024-06-03 19:35:20,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:20,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:22,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:22,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690145049] [2024-06-03 19:35:22,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690145049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:22,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:22,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:35:22,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252416454] [2024-06-03 19:35:22,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:22,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:35:22,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:22,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:35:22,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:35:22,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:35:22,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 365 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 19:35:22,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:22,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:35:22,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:22,923 INFO L124 PetriNetUnfolderBase]: 1856/2900 cut-off events. [2024-06-03 19:35:22,923 INFO L125 PetriNetUnfolderBase]: For 14773/14779 co-relation queries the response was YES. [2024-06-03 19:35:22,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10882 conditions, 2900 events. 1856/2900 cut-off events. For 14773/14779 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14909 event pairs, 731 based on Foata normal form. 5/2888 useless extension candidates. Maximal degree in co-relation 10854. Up to 2601 conditions per place. [2024-06-03 19:35:22,937 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 64 selfloop transitions, 26 changer transitions 0/96 dead transitions. [2024-06-03 19:35:22,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 96 transitions, 697 flow [2024-06-03 19:35:22,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:35:22,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:35:22,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-03 19:35:22,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793650793650794 [2024-06-03 19:35:22,939 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 365 flow. Second operand 7 states and 151 transitions. [2024-06-03 19:35:22,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 96 transitions, 697 flow [2024-06-03 19:35:22,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 96 transitions, 657 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 19:35:22,945 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 444 flow [2024-06-03 19:35:22,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=444, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2024-06-03 19:35:22,946 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 24 predicate places. [2024-06-03 19:35:22,946 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 444 flow [2024-06-03 19:35:22,946 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 19:35:22,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:22,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:22,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:35:22,947 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 19:35:22,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:22,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1317707417, now seen corresponding path program 2 times [2024-06-03 19:35:22,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:22,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274055150] [2024-06-03 19:35:22,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:22,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:23,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:23,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:23,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274055150] [2024-06-03 19:35:23,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274055150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:23,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:23,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:35:23,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519775395] [2024-06-03 19:35:23,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:23,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:35:23,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:23,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:35:23,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:35:24,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:35:24,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 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 19:35:24,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:24,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:35:24,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:24,893 INFO L124 PetriNetUnfolderBase]: 1867/2908 cut-off events. [2024-06-03 19:35:24,894 INFO L125 PetriNetUnfolderBase]: For 18390/18396 co-relation queries the response was YES. [2024-06-03 19:35:24,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11747 conditions, 2908 events. 1867/2908 cut-off events. For 18390/18396 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14909 event pairs, 745 based on Foata normal form. 3/2887 useless extension candidates. Maximal degree in co-relation 11718. Up to 2608 conditions per place. [2024-06-03 19:35:24,964 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 60 selfloop transitions, 34 changer transitions 0/100 dead transitions. [2024-06-03 19:35:24,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 828 flow [2024-06-03 19:35:24,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:35:24,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:35:24,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-03 19:35:24,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793650793650794 [2024-06-03 19:35:24,965 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 444 flow. Second operand 7 states and 151 transitions. [2024-06-03 19:35:24,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 828 flow [2024-06-03 19:35:24,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 100 transitions, 792 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 19:35:24,975 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 546 flow [2024-06-03 19:35:24,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=546, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-03 19:35:24,988 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 28 predicate places. [2024-06-03 19:35:24,988 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 546 flow [2024-06-03 19:35:24,988 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 19:35:24,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:24,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:24,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:35:24,989 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 19:35:24,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:24,989 INFO L85 PathProgramCache]: Analyzing trace with hash -538024405, now seen corresponding path program 3 times [2024-06-03 19:35:24,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:24,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475486946] [2024-06-03 19:35:24,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:24,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:25,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:25,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475486946] [2024-06-03 19:35:25,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475486946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:25,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:25,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:35:25,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944178198] [2024-06-03 19:35:25,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:25,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:35:25,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:25,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:35:25,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:35:25,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:35:25,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 546 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 19:35:25,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:25,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:35:25,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:26,698 INFO L124 PetriNetUnfolderBase]: 1862/2901 cut-off events. [2024-06-03 19:35:26,699 INFO L125 PetriNetUnfolderBase]: For 21732/21738 co-relation queries the response was YES. [2024-06-03 19:35:26,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12217 conditions, 2901 events. 1862/2901 cut-off events. For 21732/21738 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14889 event pairs, 745 based on Foata normal form. 3/2880 useless extension candidates. Maximal degree in co-relation 12186. Up to 2605 conditions per place. [2024-06-03 19:35:26,717 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 59 selfloop transitions, 33 changer transitions 0/98 dead transitions. [2024-06-03 19:35:26,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 98 transitions, 826 flow [2024-06-03 19:35:26,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:35:26,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:35:26,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-03 19:35:26,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.473015873015873 [2024-06-03 19:35:26,719 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 546 flow. Second operand 7 states and 149 transitions. [2024-06-03 19:35:26,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 98 transitions, 826 flow [2024-06-03 19:35:26,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 98 transitions, 764 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 19:35:26,731 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 558 flow [2024-06-03 19:35:26,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=558, PETRI_PLACES=78, PETRI_TRANSITIONS=77} [2024-06-03 19:35:26,731 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 32 predicate places. [2024-06-03 19:35:26,731 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 558 flow [2024-06-03 19:35:26,732 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 19:35:26,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:26,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:26,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:35:26,732 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:35:26,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:26,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1407223686, now seen corresponding path program 1 times [2024-06-03 19:35:26,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:26,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482622503] [2024-06-03 19:35:26,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:26,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:27,650 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 19:35:27,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:27,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482622503] [2024-06-03 19:35:27,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482622503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:27,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:27,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:35:27,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010489692] [2024-06-03 19:35:27,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:27,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:35:27,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:27,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:35:27,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:35:27,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-06-03 19:35:27,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 558 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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 19:35:27,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:27,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-06-03 19:35:27,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:28,089 INFO L124 PetriNetUnfolderBase]: 1534/2566 cut-off events. [2024-06-03 19:35:28,090 INFO L125 PetriNetUnfolderBase]: For 20486/20486 co-relation queries the response was YES. [2024-06-03 19:35:28,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10648 conditions, 2566 events. 1534/2566 cut-off events. For 20486/20486 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 14034 event pairs, 581 based on Foata normal form. 1/2551 useless extension candidates. Maximal degree in co-relation 10615. Up to 2252 conditions per place. [2024-06-03 19:35:28,106 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 66 selfloop transitions, 10 changer transitions 0/89 dead transitions. [2024-06-03 19:35:28,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 89 transitions, 760 flow [2024-06-03 19:35:28,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:35:28,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:35:28,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-03 19:35:28,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44814814814814813 [2024-06-03 19:35:28,107 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 558 flow. Second operand 6 states and 121 transitions. [2024-06-03 19:35:28,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 89 transitions, 760 flow [2024-06-03 19:35:28,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 679 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:35:28,117 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 546 flow [2024-06-03 19:35:28,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=546, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2024-06-03 19:35:28,118 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 33 predicate places. [2024-06-03 19:35:28,118 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 546 flow [2024-06-03 19:35:28,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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 19:35:28,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:28,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:28,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:35:28,119 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 19:35:28,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:28,119 INFO L85 PathProgramCache]: Analyzing trace with hash 176936383, now seen corresponding path program 1 times [2024-06-03 19:35:28,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:28,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247831588] [2024-06-03 19:35:28,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:28,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:28,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:28,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247831588] [2024-06-03 19:35:28,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247831588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:28,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:28,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:35:28,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635260928] [2024-06-03 19:35:28,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:28,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:35:28,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:28,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:35:28,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:35:29,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:35:29,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 546 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:29,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:29,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:35:29,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:29,751 INFO L124 PetriNetUnfolderBase]: 1886/2949 cut-off events. [2024-06-03 19:35:29,752 INFO L125 PetriNetUnfolderBase]: For 27374/27377 co-relation queries the response was YES. [2024-06-03 19:35:29,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12992 conditions, 2949 events. 1886/2949 cut-off events. For 27374/27377 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15202 event pairs, 730 based on Foata normal form. 2/2947 useless extension candidates. Maximal degree in co-relation 12957. Up to 2630 conditions per place. [2024-06-03 19:35:29,768 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 70 selfloop transitions, 37 changer transitions 0/113 dead transitions. [2024-06-03 19:35:29,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 113 transitions, 992 flow [2024-06-03 19:35:29,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:35:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:35:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-03 19:35:29,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48253968253968255 [2024-06-03 19:35:29,770 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 546 flow. Second operand 7 states and 152 transitions. [2024-06-03 19:35:29,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 113 transitions, 992 flow [2024-06-03 19:35:29,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 113 transitions, 962 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-03 19:35:29,787 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 667 flow [2024-06-03 19:35:29,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=667, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2024-06-03 19:35:29,788 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 37 predicate places. [2024-06-03 19:35:29,788 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 667 flow [2024-06-03 19:35:29,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:29,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:29,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:29,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:35:29,789 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 19:35:29,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:29,789 INFO L85 PathProgramCache]: Analyzing trace with hash -694995774, now seen corresponding path program 1 times [2024-06-03 19:35:29,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:29,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78103771] [2024-06-03 19:35:29,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:29,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:30,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:30,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78103771] [2024-06-03 19:35:30,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78103771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:30,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:30,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:30,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313757579] [2024-06-03 19:35:30,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:30,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:30,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:30,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:30,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:31,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:35:31,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 667 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 19:35:31,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:31,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:35:31,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:32,057 INFO L124 PetriNetUnfolderBase]: 1930/3019 cut-off events. [2024-06-03 19:35:32,058 INFO L125 PetriNetUnfolderBase]: For 31761/31764 co-relation queries the response was YES. [2024-06-03 19:35:32,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13653 conditions, 3019 events. 1930/3019 cut-off events. For 31761/31764 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15598 event pairs, 640 based on Foata normal form. 8/3023 useless extension candidates. Maximal degree in co-relation 13617. Up to 2539 conditions per place. [2024-06-03 19:35:32,078 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 79 selfloop transitions, 41 changer transitions 0/126 dead transitions. [2024-06-03 19:35:32,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 126 transitions, 1105 flow [2024-06-03 19:35:32,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:32,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:32,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-03 19:35:32,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-03 19:35:32,079 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 667 flow. Second operand 8 states and 175 transitions. [2024-06-03 19:35:32,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 126 transitions, 1105 flow [2024-06-03 19:35:32,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 126 transitions, 1047 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 19:35:32,097 INFO L231 Difference]: Finished difference. Result has 88 places, 95 transitions, 768 flow [2024-06-03 19:35:32,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=768, PETRI_PLACES=88, PETRI_TRANSITIONS=95} [2024-06-03 19:35:32,097 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 42 predicate places. [2024-06-03 19:35:32,097 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 95 transitions, 768 flow [2024-06-03 19:35:32,098 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 19:35:32,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:32,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:32,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:35:32,098 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 19:35:32,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:32,098 INFO L85 PathProgramCache]: Analyzing trace with hash -695001571, now seen corresponding path program 2 times [2024-06-03 19:35:32,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:32,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699681651] [2024-06-03 19:35:32,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:32,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:32,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:32,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699681651] [2024-06-03 19:35:32,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699681651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:32,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:32,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:35:32,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667584949] [2024-06-03 19:35:32,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:32,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:35:32,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:32,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:35:32,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:35:33,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:35:33,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 95 transitions, 768 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:33,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:33,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:35:33,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:33,794 INFO L124 PetriNetUnfolderBase]: 1925/3017 cut-off events. [2024-06-03 19:35:33,794 INFO L125 PetriNetUnfolderBase]: For 36098/36101 co-relation queries the response was YES. [2024-06-03 19:35:33,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14422 conditions, 3017 events. 1925/3017 cut-off events. For 36098/36101 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15601 event pairs, 691 based on Foata normal form. 2/3015 useless extension candidates. Maximal degree in co-relation 14385. Up to 2689 conditions per place. [2024-06-03 19:35:33,813 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 75 selfloop transitions, 40 changer transitions 0/121 dead transitions. [2024-06-03 19:35:33,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 121 transitions, 1126 flow [2024-06-03 19:35:33,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:35:33,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:35:33,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-03 19:35:33,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-03 19:35:33,815 INFO L175 Difference]: Start difference. First operand has 88 places, 95 transitions, 768 flow. Second operand 7 states and 154 transitions. [2024-06-03 19:35:33,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 121 transitions, 1126 flow [2024-06-03 19:35:33,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 121 transitions, 1064 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-03 19:35:33,839 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 794 flow [2024-06-03 19:35:33,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=794, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2024-06-03 19:35:33,839 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 45 predicate places. [2024-06-03 19:35:33,839 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 794 flow [2024-06-03 19:35:33,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:33,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:33,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:33,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:35:33,840 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 19:35:33,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:33,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2100744454, now seen corresponding path program 2 times [2024-06-03 19:35:33,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:33,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892847966] [2024-06-03 19:35:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:33,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:34,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:34,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892847966] [2024-06-03 19:35:34,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892847966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:34,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:34,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:34,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363696506] [2024-06-03 19:35:34,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:34,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:34,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:34,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:34,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:34,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:35:34,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 794 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 19:35:34,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:34,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:35:34,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:35,626 INFO L124 PetriNetUnfolderBase]: 1979/3084 cut-off events. [2024-06-03 19:35:35,627 INFO L125 PetriNetUnfolderBase]: For 41853/41859 co-relation queries the response was YES. [2024-06-03 19:35:35,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15131 conditions, 3084 events. 1979/3084 cut-off events. For 41853/41859 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15832 event pairs, 660 based on Foata normal form. 5/3076 useless extension candidates. Maximal degree in co-relation 15092. Up to 2558 conditions per place. [2024-06-03 19:35:35,651 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 78 selfloop transitions, 53 changer transitions 0/137 dead transitions. [2024-06-03 19:35:35,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 137 transitions, 1424 flow [2024-06-03 19:35:35,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:35,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:35,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-03 19:35:35,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2024-06-03 19:35:35,653 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 794 flow. Second operand 8 states and 178 transitions. [2024-06-03 19:35:35,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 137 transitions, 1424 flow [2024-06-03 19:35:35,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 137 transitions, 1304 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 19:35:35,680 INFO L231 Difference]: Finished difference. Result has 92 places, 104 transitions, 892 flow [2024-06-03 19:35:35,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=892, PETRI_PLACES=92, PETRI_TRANSITIONS=104} [2024-06-03 19:35:35,681 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 46 predicate places. [2024-06-03 19:35:35,681 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 104 transitions, 892 flow [2024-06-03 19:35:35,681 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 19:35:35,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:35,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:35,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:35:35,682 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 19:35:35,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:35,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1199561089, now seen corresponding path program 3 times [2024-06-03 19:35:35,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:35,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182665930] [2024-06-03 19:35:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:35,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:36,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:36,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182665930] [2024-06-03 19:35:36,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182665930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:36,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:36,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:35:36,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246063141] [2024-06-03 19:35:36,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:36,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:35:36,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:36,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:35:36,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:35:36,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:35:36,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 104 transitions, 892 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:36,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:36,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:35:36,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:37,273 INFO L124 PetriNetUnfolderBase]: 1974/3088 cut-off events. [2024-06-03 19:35:37,273 INFO L125 PetriNetUnfolderBase]: For 45983/45992 co-relation queries the response was YES. [2024-06-03 19:35:37,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15576 conditions, 3088 events. 1974/3088 cut-off events. For 45983/45992 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15935 event pairs, 717 based on Foata normal form. 5/3084 useless extension candidates. Maximal degree in co-relation 15537. Up to 2762 conditions per place. [2024-06-03 19:35:37,301 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 83 selfloop transitions, 34 changer transitions 0/123 dead transitions. [2024-06-03 19:35:37,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 123 transitions, 1176 flow [2024-06-03 19:35:37,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:35:37,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:35:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-03 19:35:37,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-03 19:35:37,302 INFO L175 Difference]: Start difference. First operand has 92 places, 104 transitions, 892 flow. Second operand 7 states and 144 transitions. [2024-06-03 19:35:37,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 123 transitions, 1176 flow [2024-06-03 19:35:37,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 123 transitions, 1120 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-03 19:35:37,344 INFO L231 Difference]: Finished difference. Result has 97 places, 104 transitions, 912 flow [2024-06-03 19:35:37,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=912, PETRI_PLACES=97, PETRI_TRANSITIONS=104} [2024-06-03 19:35:37,345 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 51 predicate places. [2024-06-03 19:35:37,345 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 104 transitions, 912 flow [2024-06-03 19:35:37,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:37,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:37,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:37,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:35:37,346 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 19:35:37,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:37,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1453313232, now seen corresponding path program 3 times [2024-06-03 19:35:37,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:37,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420972670] [2024-06-03 19:35:37,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:37,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:38,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:38,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420972670] [2024-06-03 19:35:38,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420972670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:38,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:38,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:38,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43890158] [2024-06-03 19:35:38,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:38,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:38,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:38,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:38,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:38,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:35:38,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 104 transitions, 912 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 19:35:38,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:38,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:35:38,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:39,119 INFO L124 PetriNetUnfolderBase]: 1964/3060 cut-off events. [2024-06-03 19:35:39,120 INFO L125 PetriNetUnfolderBase]: For 49340/49346 co-relation queries the response was YES. [2024-06-03 19:35:39,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15584 conditions, 3060 events. 1964/3060 cut-off events. For 49340/49346 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15720 event pairs, 658 based on Foata normal form. 5/3050 useless extension candidates. Maximal degree in co-relation 15542. Up to 2551 conditions per place. [2024-06-03 19:35:39,141 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 73 selfloop transitions, 55 changer transitions 0/134 dead transitions. [2024-06-03 19:35:39,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 134 transitions, 1382 flow [2024-06-03 19:35:39,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:39,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-03 19:35:39,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-03 19:35:39,144 INFO L175 Difference]: Start difference. First operand has 97 places, 104 transitions, 912 flow. Second operand 8 states and 175 transitions. [2024-06-03 19:35:39,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 134 transitions, 1382 flow [2024-06-03 19:35:39,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 134 transitions, 1262 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 19:35:39,189 INFO L231 Difference]: Finished difference. Result has 98 places, 104 transitions, 910 flow [2024-06-03 19:35:39,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=910, PETRI_PLACES=98, PETRI_TRANSITIONS=104} [2024-06-03 19:35:39,194 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 52 predicate places. [2024-06-03 19:35:39,194 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 104 transitions, 910 flow [2024-06-03 19:35:39,195 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 19:35:39,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:39,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:39,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:35:39,195 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:35:39,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:39,196 INFO L85 PathProgramCache]: Analyzing trace with hash 501114050, now seen corresponding path program 4 times [2024-06-03 19:35:39,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:39,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979013216] [2024-06-03 19:35:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:39,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:40,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:40,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979013216] [2024-06-03 19:35:40,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979013216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:40,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:40,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:40,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062938718] [2024-06-03 19:35:40,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:40,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:40,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:40,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:40,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:40,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:35:40,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 104 transitions, 910 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 19:35:40,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:40,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:35:40,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:41,039 INFO L124 PetriNetUnfolderBase]: 1954/3048 cut-off events. [2024-06-03 19:35:41,039 INFO L125 PetriNetUnfolderBase]: For 53247/53253 co-relation queries the response was YES. [2024-06-03 19:35:41,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15758 conditions, 3048 events. 1954/3048 cut-off events. For 53247/53253 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15670 event pairs, 656 based on Foata normal form. 5/3036 useless extension candidates. Maximal degree in co-relation 15715. Up to 2547 conditions per place. [2024-06-03 19:35:41,060 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 75 selfloop transitions, 52 changer transitions 0/133 dead transitions. [2024-06-03 19:35:41,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 133 transitions, 1310 flow [2024-06-03 19:35:41,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:41,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:41,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-03 19:35:41,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-03 19:35:41,062 INFO L175 Difference]: Start difference. First operand has 98 places, 104 transitions, 910 flow. Second operand 8 states and 174 transitions. [2024-06-03 19:35:41,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 133 transitions, 1310 flow [2024-06-03 19:35:41,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 133 transitions, 1166 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 19:35:41,098 INFO L231 Difference]: Finished difference. Result has 99 places, 104 transitions, 878 flow [2024-06-03 19:35:41,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=878, PETRI_PLACES=99, PETRI_TRANSITIONS=104} [2024-06-03 19:35:41,099 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 53 predicate places. [2024-06-03 19:35:41,099 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 104 transitions, 878 flow [2024-06-03 19:35:41,099 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 19:35:41,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:41,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:41,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:35:41,100 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:35:41,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:41,100 INFO L85 PathProgramCache]: Analyzing trace with hash -674260148, now seen corresponding path program 1 times [2024-06-03 19:35:41,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:41,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261691059] [2024-06-03 19:35:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:41,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:42,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:42,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:42,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261691059] [2024-06-03 19:35:42,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261691059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:42,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:42,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:35:42,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723960800] [2024-06-03 19:35:42,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:42,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:35:42,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:42,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:35:42,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:35:42,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:35:42,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 104 transitions, 878 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:42,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:42,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:35:42,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:42,569 INFO L124 PetriNetUnfolderBase]: 1845/2973 cut-off events. [2024-06-03 19:35:42,569 INFO L125 PetriNetUnfolderBase]: For 56982/56982 co-relation queries the response was YES. [2024-06-03 19:35:42,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15402 conditions, 2973 events. 1845/2973 cut-off events. For 56982/56982 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15876 event pairs, 649 based on Foata normal form. 1/2971 useless extension candidates. Maximal degree in co-relation 15359. Up to 2703 conditions per place. [2024-06-03 19:35:42,585 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 89 selfloop transitions, 12 changer transitions 0/115 dead transitions. [2024-06-03 19:35:42,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 115 transitions, 1126 flow [2024-06-03 19:35:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:35:42,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:35:42,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-03 19:35:42,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44074074074074077 [2024-06-03 19:35:42,586 INFO L175 Difference]: Start difference. First operand has 99 places, 104 transitions, 878 flow. Second operand 6 states and 119 transitions. [2024-06-03 19:35:42,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 115 transitions, 1126 flow [2024-06-03 19:35:42,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 115 transitions, 983 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 19:35:42,614 INFO L231 Difference]: Finished difference. Result has 97 places, 107 transitions, 797 flow [2024-06-03 19:35:42,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=797, PETRI_PLACES=97, PETRI_TRANSITIONS=107} [2024-06-03 19:35:42,614 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 51 predicate places. [2024-06-03 19:35:42,614 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 107 transitions, 797 flow [2024-06-03 19:35:42,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:42,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:42,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:42,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:35:42,615 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 19:35:42,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:42,615 INFO L85 PathProgramCache]: Analyzing trace with hash 46830706, now seen corresponding path program 1 times [2024-06-03 19:35:42,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:42,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198236162] [2024-06-03 19:35:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:42,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:43,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:43,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198236162] [2024-06-03 19:35:43,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198236162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:43,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:43,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:35:43,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958115133] [2024-06-03 19:35:43,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:43,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:35:43,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:43,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:35:43,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:35:43,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:35:43,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 107 transitions, 797 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:43,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:43,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:35:43,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:44,179 INFO L124 PetriNetUnfolderBase]: 1934/3072 cut-off events. [2024-06-03 19:35:44,179 INFO L125 PetriNetUnfolderBase]: For 71312/71315 co-relation queries the response was YES. [2024-06-03 19:35:44,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16860 conditions, 3072 events. 1934/3072 cut-off events. For 71312/71315 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16377 event pairs, 486 based on Foata normal form. 6/3074 useless extension candidates. Maximal degree in co-relation 16816. Up to 2634 conditions per place. [2024-06-03 19:35:44,197 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 97 selfloop transitions, 24 changer transitions 0/136 dead transitions. [2024-06-03 19:35:44,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 136 transitions, 1231 flow [2024-06-03 19:35:44,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:35:44,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:35:44,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-03 19:35:44,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-03 19:35:44,199 INFO L175 Difference]: Start difference. First operand has 97 places, 107 transitions, 797 flow. Second operand 7 states and 154 transitions. [2024-06-03 19:35:44,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 136 transitions, 1231 flow [2024-06-03 19:35:44,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 136 transitions, 1191 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:35:44,227 INFO L231 Difference]: Finished difference. Result has 100 places, 111 transitions, 864 flow [2024-06-03 19:35:44,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=864, PETRI_PLACES=100, PETRI_TRANSITIONS=111} [2024-06-03 19:35:44,227 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 54 predicate places. [2024-06-03 19:35:44,227 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 111 transitions, 864 flow [2024-06-03 19:35:44,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:44,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:44,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:44,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:35:44,228 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 19:35:44,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:44,228 INFO L85 PathProgramCache]: Analyzing trace with hash -188303440, now seen corresponding path program 2 times [2024-06-03 19:35:44,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:44,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905697644] [2024-06-03 19:35:44,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:44,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:45,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:45,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:45,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905697644] [2024-06-03 19:35:45,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905697644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:45,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:45,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:35:45,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976781669] [2024-06-03 19:35:45,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:45,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:35:45,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:45,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:35:45,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:35:45,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:35:45,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 111 transitions, 864 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:45,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:45,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:35:45,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:45,845 INFO L124 PetriNetUnfolderBase]: 1926/3060 cut-off events. [2024-06-03 19:35:45,846 INFO L125 PetriNetUnfolderBase]: For 77126/77129 co-relation queries the response was YES. [2024-06-03 19:35:45,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17247 conditions, 3060 events. 1926/3060 cut-off events. For 77126/77129 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16295 event pairs, 645 based on Foata normal form. 6/3062 useless extension candidates. Maximal degree in co-relation 17202. Up to 2699 conditions per place. [2024-06-03 19:35:45,865 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 96 selfloop transitions, 22 changer transitions 0/133 dead transitions. [2024-06-03 19:35:45,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 133 transitions, 1158 flow [2024-06-03 19:35:45,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:35:45,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:35:45,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-03 19:35:45,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48253968253968255 [2024-06-03 19:35:45,868 INFO L175 Difference]: Start difference. First operand has 100 places, 111 transitions, 864 flow. Second operand 7 states and 152 transitions. [2024-06-03 19:35:45,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 133 transitions, 1158 flow [2024-06-03 19:35:45,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 133 transitions, 1101 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 19:35:45,907 INFO L231 Difference]: Finished difference. Result has 104 places, 111 transitions, 858 flow [2024-06-03 19:35:45,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=858, PETRI_PLACES=104, PETRI_TRANSITIONS=111} [2024-06-03 19:35:45,908 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 58 predicate places. [2024-06-03 19:35:45,908 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 111 transitions, 858 flow [2024-06-03 19:35:45,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:45,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:45,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:45,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:35:45,909 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 19:35:45,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:45,909 INFO L85 PathProgramCache]: Analyzing trace with hash -70031310, now seen corresponding path program 1 times [2024-06-03 19:35:45,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:45,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490092652] [2024-06-03 19:35:45,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:45,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:46,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:46,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490092652] [2024-06-03 19:35:46,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490092652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:46,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:46,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:46,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960454938] [2024-06-03 19:35:46,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:46,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:46,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:46,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:46,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:46,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:35:46,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 111 transitions, 858 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:46,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:46,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:35:46,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:47,798 INFO L124 PetriNetUnfolderBase]: 2085/3257 cut-off events. [2024-06-03 19:35:47,799 INFO L125 PetriNetUnfolderBase]: For 85300/85303 co-relation queries the response was YES. [2024-06-03 19:35:47,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18468 conditions, 3257 events. 2085/3257 cut-off events. For 85300/85303 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17008 event pairs, 635 based on Foata normal form. 4/3257 useless extension candidates. Maximal degree in co-relation 18421. Up to 2676 conditions per place. [2024-06-03 19:35:47,820 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 88 selfloop transitions, 55 changer transitions 0/150 dead transitions. [2024-06-03 19:35:47,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 150 transitions, 1478 flow [2024-06-03 19:35:47,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:47,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:47,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-03 19:35:47,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-06-03 19:35:47,821 INFO L175 Difference]: Start difference. First operand has 104 places, 111 transitions, 858 flow. Second operand 8 states and 177 transitions. [2024-06-03 19:35:47,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 150 transitions, 1478 flow [2024-06-03 19:35:47,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 150 transitions, 1426 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 19:35:47,859 INFO L231 Difference]: Finished difference. Result has 106 places, 117 transitions, 1001 flow [2024-06-03 19:35:47,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1001, PETRI_PLACES=106, PETRI_TRANSITIONS=117} [2024-06-03 19:35:47,860 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 60 predicate places. [2024-06-03 19:35:47,860 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 117 transitions, 1001 flow [2024-06-03 19:35:47,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:47,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:47,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:47,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:35:47,861 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 19:35:47,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:47,862 INFO L85 PathProgramCache]: Analyzing trace with hash 2136686050, now seen corresponding path program 2 times [2024-06-03 19:35:47,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:47,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792125844] [2024-06-03 19:35:47,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:47,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:47,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:48,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:48,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792125844] [2024-06-03 19:35:48,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792125844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:48,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:48,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:48,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579350435] [2024-06-03 19:35:48,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:48,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:48,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:48,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:48,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:48,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:35:48,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 117 transitions, 1001 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:48,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:48,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:35:48,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:49,599 INFO L124 PetriNetUnfolderBase]: 2107/3294 cut-off events. [2024-06-03 19:35:49,600 INFO L125 PetriNetUnfolderBase]: For 92837/92840 co-relation queries the response was YES. [2024-06-03 19:35:49,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19126 conditions, 3294 events. 2107/3294 cut-off events. For 92837/92840 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17279 event pairs, 635 based on Foata normal form. 4/3294 useless extension candidates. Maximal degree in co-relation 19078. Up to 2695 conditions per place. [2024-06-03 19:35:49,625 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 90 selfloop transitions, 57 changer transitions 0/154 dead transitions. [2024-06-03 19:35:49,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 154 transitions, 1607 flow [2024-06-03 19:35:49,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:49,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-03 19:35:49,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49722222222222223 [2024-06-03 19:35:49,644 INFO L175 Difference]: Start difference. First operand has 106 places, 117 transitions, 1001 flow. Second operand 8 states and 179 transitions. [2024-06-03 19:35:49,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 154 transitions, 1607 flow [2024-06-03 19:35:49,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 154 transitions, 1501 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-03 19:35:49,698 INFO L231 Difference]: Finished difference. Result has 110 places, 120 transitions, 1061 flow [2024-06-03 19:35:49,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1061, PETRI_PLACES=110, PETRI_TRANSITIONS=120} [2024-06-03 19:35:49,698 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 64 predicate places. [2024-06-03 19:35:49,698 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 120 transitions, 1061 flow [2024-06-03 19:35:49,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:49,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:49,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:49,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:35:49,699 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 19:35:49,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:49,700 INFO L85 PathProgramCache]: Analyzing trace with hash -70210800, now seen corresponding path program 3 times [2024-06-03 19:35:49,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:49,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451678370] [2024-06-03 19:35:49,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:49,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:50,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:50,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451678370] [2024-06-03 19:35:50,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451678370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:50,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:50,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:50,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702622358] [2024-06-03 19:35:50,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:50,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:50,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:50,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:50,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:50,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:35:50,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 120 transitions, 1061 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:50,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:50,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:35:50,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:51,700 INFO L124 PetriNetUnfolderBase]: 2097/3280 cut-off events. [2024-06-03 19:35:51,701 INFO L125 PetriNetUnfolderBase]: For 98846/98849 co-relation queries the response was YES. [2024-06-03 19:35:51,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19211 conditions, 3280 events. 2097/3280 cut-off events. For 98846/98849 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17226 event pairs, 626 based on Foata normal form. 4/3280 useless extension candidates. Maximal degree in co-relation 19162. Up to 2687 conditions per place. [2024-06-03 19:35:51,728 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 85 selfloop transitions, 62 changer transitions 0/154 dead transitions. [2024-06-03 19:35:51,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 154 transitions, 1539 flow [2024-06-03 19:35:51,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:51,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:51,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-03 19:35:51,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49722222222222223 [2024-06-03 19:35:51,730 INFO L175 Difference]: Start difference. First operand has 110 places, 120 transitions, 1061 flow. Second operand 8 states and 179 transitions. [2024-06-03 19:35:51,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 154 transitions, 1539 flow [2024-06-03 19:35:51,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 154 transitions, 1425 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 19:35:51,787 INFO L231 Difference]: Finished difference. Result has 113 places, 120 transitions, 1079 flow [2024-06-03 19:35:51,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=947, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1079, PETRI_PLACES=113, PETRI_TRANSITIONS=120} [2024-06-03 19:35:51,788 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 67 predicate places. [2024-06-03 19:35:51,788 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 120 transitions, 1079 flow [2024-06-03 19:35:51,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:51,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:51,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:51,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:35:51,788 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:35:51,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:51,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1125436419, now seen corresponding path program 1 times [2024-06-03 19:35:51,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:51,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678049047] [2024-06-03 19:35:51,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:51,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:53,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:53,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678049047] [2024-06-03 19:35:53,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678049047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:53,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:53,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:35:53,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795060725] [2024-06-03 19:35:53,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:53,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:35:53,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:53,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:35:53,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:35:53,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:35:53,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 120 transitions, 1079 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:53,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:53,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:35:53,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:53,693 INFO L124 PetriNetUnfolderBase]: 2018/3198 cut-off events. [2024-06-03 19:35:53,693 INFO L125 PetriNetUnfolderBase]: For 104632/104632 co-relation queries the response was YES. [2024-06-03 19:35:53,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19209 conditions, 3198 events. 2018/3198 cut-off events. For 104632/104632 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17080 event pairs, 650 based on Foata normal form. 1/3196 useless extension candidates. Maximal degree in co-relation 19159. Up to 2897 conditions per place. [2024-06-03 19:35:53,714 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 110 selfloop transitions, 12 changer transitions 0/137 dead transitions. [2024-06-03 19:35:53,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 137 transitions, 1389 flow [2024-06-03 19:35:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:35:53,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:35:53,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-03 19:35:53,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-03 19:35:53,716 INFO L175 Difference]: Start difference. First operand has 113 places, 120 transitions, 1079 flow. Second operand 6 states and 125 transitions. [2024-06-03 19:35:53,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 137 transitions, 1389 flow [2024-06-03 19:35:53,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 137 transitions, 1184 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-03 19:35:53,760 INFO L231 Difference]: Finished difference. Result has 110 places, 123 transitions, 938 flow [2024-06-03 19:35:53,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=938, PETRI_PLACES=110, PETRI_TRANSITIONS=123} [2024-06-03 19:35:53,760 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 64 predicate places. [2024-06-03 19:35:53,761 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 123 transitions, 938 flow [2024-06-03 19:35:53,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:53,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:53,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:53,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:35:53,761 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 19:35:53,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:53,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1986379492, now seen corresponding path program 4 times [2024-06-03 19:35:53,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:53,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593567069] [2024-06-03 19:35:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:53,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:54,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:54,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593567069] [2024-06-03 19:35:54,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593567069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:54,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:54,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:54,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303928895] [2024-06-03 19:35:54,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:54,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:54,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:54,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:54,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:54,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:35:54,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 123 transitions, 938 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:54,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:54,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:35:54,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:55,559 INFO L124 PetriNetUnfolderBase]: 2182/3406 cut-off events. [2024-06-03 19:35:55,559 INFO L125 PetriNetUnfolderBase]: For 113203/113212 co-relation queries the response was YES. [2024-06-03 19:35:55,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20406 conditions, 3406 events. 2182/3406 cut-off events. For 113203/113212 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17926 event pairs, 650 based on Foata normal form. 7/3404 useless extension candidates. Maximal degree in co-relation 20356. Up to 2766 conditions per place. [2024-06-03 19:35:55,591 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 94 selfloop transitions, 59 changer transitions 0/160 dead transitions. [2024-06-03 19:35:55,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 160 transitions, 1600 flow [2024-06-03 19:35:55,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-03 19:35:55,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-03 19:35:55,593 INFO L175 Difference]: Start difference. First operand has 110 places, 123 transitions, 938 flow. Second operand 8 states and 174 transitions. [2024-06-03 19:35:55,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 160 transitions, 1600 flow [2024-06-03 19:35:55,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 160 transitions, 1558 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-03 19:35:55,637 INFO L231 Difference]: Finished difference. Result has 114 places, 129 transitions, 1098 flow [2024-06-03 19:35:55,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1098, PETRI_PLACES=114, PETRI_TRANSITIONS=129} [2024-06-03 19:35:55,638 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 68 predicate places. [2024-06-03 19:35:55,638 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 129 transitions, 1098 flow [2024-06-03 19:35:55,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:55,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:55,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:55,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:35:55,639 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 19:35:55,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:55,639 INFO L85 PathProgramCache]: Analyzing trace with hash 698563328, now seen corresponding path program 5 times [2024-06-03 19:35:55,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:55,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382434311] [2024-06-03 19:35:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:55,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:56,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:56,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382434311] [2024-06-03 19:35:56,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382434311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:56,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:56,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:56,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902774234] [2024-06-03 19:35:56,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:56,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:56,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:56,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:56,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:56,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:35:56,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 129 transitions, 1098 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:56,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:56,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:35:56,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:57,406 INFO L124 PetriNetUnfolderBase]: 2172/3392 cut-off events. [2024-06-03 19:35:57,407 INFO L125 PetriNetUnfolderBase]: For 120246/120255 co-relation queries the response was YES. [2024-06-03 19:35:57,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20795 conditions, 3392 events. 2172/3392 cut-off events. For 120246/120255 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17866 event pairs, 648 based on Foata normal form. 7/3390 useless extension candidates. Maximal degree in co-relation 20744. Up to 2758 conditions per place. [2024-06-03 19:35:57,429 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 91 selfloop transitions, 60 changer transitions 0/158 dead transitions. [2024-06-03 19:35:57,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 158 transitions, 1578 flow [2024-06-03 19:35:57,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:57,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-03 19:35:57,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-03 19:35:57,430 INFO L175 Difference]: Start difference. First operand has 114 places, 129 transitions, 1098 flow. Second operand 8 states and 171 transitions. [2024-06-03 19:35:57,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 158 transitions, 1578 flow [2024-06-03 19:35:57,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 158 transitions, 1410 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 19:35:57,473 INFO L231 Difference]: Finished difference. Result has 117 places, 129 transitions, 1058 flow [2024-06-03 19:35:57,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1058, PETRI_PLACES=117, PETRI_TRANSITIONS=129} [2024-06-03 19:35:57,474 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 71 predicate places. [2024-06-03 19:35:57,474 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 129 transitions, 1058 flow [2024-06-03 19:35:57,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:57,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:57,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:57,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:35:57,475 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 19:35:57,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:57,475 INFO L85 PathProgramCache]: Analyzing trace with hash 706844048, now seen corresponding path program 6 times [2024-06-03 19:35:57,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:57,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800182679] [2024-06-03 19:35:57,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:57,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:58,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:58,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800182679] [2024-06-03 19:35:58,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800182679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:58,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:58,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:35:58,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874397763] [2024-06-03 19:35:58,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:58,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:35:58,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:58,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:35:58,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:35:58,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:35:58,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 129 transitions, 1058 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:58,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:58,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:35:58,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:59,296 INFO L124 PetriNetUnfolderBase]: 2162/3378 cut-off events. [2024-06-03 19:35:59,296 INFO L125 PetriNetUnfolderBase]: For 125817/125826 co-relation queries the response was YES. [2024-06-03 19:35:59,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20805 conditions, 3378 events. 2162/3378 cut-off events. For 125817/125826 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17756 event pairs, 653 based on Foata normal form. 7/3376 useless extension candidates. Maximal degree in co-relation 20753. Up to 2750 conditions per place. [2024-06-03 19:35:59,319 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 85 selfloop transitions, 63 changer transitions 0/155 dead transitions. [2024-06-03 19:35:59,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 155 transitions, 1420 flow [2024-06-03 19:35:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:59,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:59,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-03 19:35:59,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2024-06-03 19:35:59,321 INFO L175 Difference]: Start difference. First operand has 117 places, 129 transitions, 1058 flow. Second operand 8 states and 167 transitions. [2024-06-03 19:35:59,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 155 transitions, 1420 flow [2024-06-03 19:35:59,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 155 transitions, 1263 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 19:35:59,367 INFO L231 Difference]: Finished difference. Result has 118 places, 129 transitions, 1035 flow [2024-06-03 19:35:59,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1035, PETRI_PLACES=118, PETRI_TRANSITIONS=129} [2024-06-03 19:35:59,368 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 72 predicate places. [2024-06-03 19:35:59,368 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 129 transitions, 1035 flow [2024-06-03 19:35:59,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:59,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:59,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:59,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:35:59,369 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:35:59,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:59,369 INFO L85 PathProgramCache]: Analyzing trace with hash 572757209, now seen corresponding path program 2 times [2024-06-03 19:35:59,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:59,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295206171] [2024-06-03 19:35:59,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:59,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:00,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:00,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295206171] [2024-06-03 19:36:00,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295206171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:00,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:00,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:36:00,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566732025] [2024-06-03 19:36:00,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:00,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:36:00,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:00,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:36:00,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:36:00,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:36:00,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 129 transitions, 1035 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:00,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:00,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:36:00,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:00,820 INFO L124 PetriNetUnfolderBase]: 2045/3262 cut-off events. [2024-06-03 19:36:00,821 INFO L125 PetriNetUnfolderBase]: For 131782/131785 co-relation queries the response was YES. [2024-06-03 19:36:00,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20523 conditions, 3262 events. 2045/3262 cut-off events. For 131782/131785 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17572 event pairs, 659 based on Foata normal form. 3/3260 useless extension candidates. Maximal degree in co-relation 20470. Up to 2933 conditions per place. [2024-06-03 19:36:00,844 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 108 selfloop transitions, 19 changer transitions 0/142 dead transitions. [2024-06-03 19:36:00,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 142 transitions, 1353 flow [2024-06-03 19:36:00,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:36:00,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:36:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-03 19:36:00,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:36:00,845 INFO L175 Difference]: Start difference. First operand has 118 places, 129 transitions, 1035 flow. Second operand 7 states and 135 transitions. [2024-06-03 19:36:00,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 142 transitions, 1353 flow [2024-06-03 19:36:00,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 142 transitions, 1203 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 19:36:00,909 INFO L231 Difference]: Finished difference. Result has 118 places, 134 transitions, 985 flow [2024-06-03 19:36:00,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=985, PETRI_PLACES=118, PETRI_TRANSITIONS=134} [2024-06-03 19:36:00,909 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 72 predicate places. [2024-06-03 19:36:00,909 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 134 transitions, 985 flow [2024-06-03 19:36:00,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:00,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:00,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:00,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:36:00,910 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:36:00,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:00,910 INFO L85 PathProgramCache]: Analyzing trace with hash -408802629, now seen corresponding path program 1 times [2024-06-03 19:36:00,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:00,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559453643] [2024-06-03 19:36:00,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:00,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:01,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:01,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559453643] [2024-06-03 19:36:01,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559453643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:01,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:01,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:36:01,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384696642] [2024-06-03 19:36:01,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:01,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:36:01,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:01,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:36:01,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:36:01,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-06-03 19:36:01,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 134 transitions, 985 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 19:36:01,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:01,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-06-03 19:36:01,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:02,374 INFO L124 PetriNetUnfolderBase]: 1821/3019 cut-off events. [2024-06-03 19:36:02,375 INFO L125 PetriNetUnfolderBase]: For 120412/120412 co-relation queries the response was YES. [2024-06-03 19:36:02,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18657 conditions, 3019 events. 1821/3019 cut-off events. For 120412/120412 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 16792 event pairs, 560 based on Foata normal form. 1/3017 useless extension candidates. Maximal degree in co-relation 18602. Up to 2618 conditions per place. [2024-06-03 19:36:02,395 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 120 selfloop transitions, 12 changer transitions 0/148 dead transitions. [2024-06-03 19:36:02,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 148 transitions, 1307 flow [2024-06-03 19:36:02,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:36:02,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:36:02,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-03 19:36:02,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4703703703703704 [2024-06-03 19:36:02,396 INFO L175 Difference]: Start difference. First operand has 118 places, 134 transitions, 985 flow. Second operand 6 states and 127 transitions. [2024-06-03 19:36:02,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 148 transitions, 1307 flow [2024-06-03 19:36:02,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 148 transitions, 1254 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-03 19:36:02,452 INFO L231 Difference]: Finished difference. Result has 121 places, 137 transitions, 998 flow [2024-06-03 19:36:02,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=998, PETRI_PLACES=121, PETRI_TRANSITIONS=137} [2024-06-03 19:36:02,452 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 75 predicate places. [2024-06-03 19:36:02,452 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 137 transitions, 998 flow [2024-06-03 19:36:02,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 19:36:02,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:02,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:02,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:36:02,453 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:36:02,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:02,453 INFO L85 PathProgramCache]: Analyzing trace with hash 572763161, now seen corresponding path program 2 times [2024-06-03 19:36:02,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:02,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422361099] [2024-06-03 19:36:02,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:02,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:02,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:03,194 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 19:36:03,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:03,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422361099] [2024-06-03 19:36:03,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422361099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:03,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:03,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:36:03,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962498923] [2024-06-03 19:36:03,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:03,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:36:03,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:03,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:36:03,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:36:03,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-06-03 19:36:03,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 137 transitions, 998 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 19:36:03,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:03,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-06-03 19:36:03,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:03,748 INFO L124 PetriNetUnfolderBase]: 1818/3016 cut-off events. [2024-06-03 19:36:03,748 INFO L125 PetriNetUnfolderBase]: For 127052/127055 co-relation queries the response was YES. [2024-06-03 19:36:03,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19111 conditions, 3016 events. 1818/3016 cut-off events. For 127052/127055 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 16806 event pairs, 564 based on Foata normal form. 3/3015 useless extension candidates. Maximal degree in co-relation 19054. Up to 2608 conditions per place. [2024-06-03 19:36:03,768 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 115 selfloop transitions, 17 changer transitions 0/148 dead transitions. [2024-06-03 19:36:03,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 148 transitions, 1318 flow [2024-06-03 19:36:03,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:36:03,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:36:03,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-03 19:36:03,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-03 19:36:03,769 INFO L175 Difference]: Start difference. First operand has 121 places, 137 transitions, 998 flow. Second operand 6 states and 126 transitions. [2024-06-03 19:36:03,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 148 transitions, 1318 flow [2024-06-03 19:36:03,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 148 transitions, 1274 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 19:36:03,827 INFO L231 Difference]: Finished difference. Result has 123 places, 140 transitions, 1036 flow [2024-06-03 19:36:03,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=954, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1036, PETRI_PLACES=123, PETRI_TRANSITIONS=140} [2024-06-03 19:36:03,827 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 77 predicate places. [2024-06-03 19:36:03,828 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 140 transitions, 1036 flow [2024-06-03 19:36:03,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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 19:36:03,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:03,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:03,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:36:03,828 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 19:36:03,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:03,829 INFO L85 PathProgramCache]: Analyzing trace with hash 707151878, now seen corresponding path program 1 times [2024-06-03 19:36:03,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:03,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688566049] [2024-06-03 19:36:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:03,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:05,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:05,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688566049] [2024-06-03 19:36:05,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688566049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:05,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:05,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:05,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124040270] [2024-06-03 19:36:05,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:05,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:05,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:05,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:05,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:05,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:36:05,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 140 transitions, 1036 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:05,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:05,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:36:05,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:06,209 INFO L124 PetriNetUnfolderBase]: 1910/3101 cut-off events. [2024-06-03 19:36:06,210 INFO L125 PetriNetUnfolderBase]: For 133891/133891 co-relation queries the response was YES. [2024-06-03 19:36:06,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19838 conditions, 3101 events. 1910/3101 cut-off events. For 133891/133891 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 16787 event pairs, 549 based on Foata normal form. 4/3102 useless extension candidates. Maximal degree in co-relation 19780. Up to 2738 conditions per place. [2024-06-03 19:36:06,232 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 144 selfloop transitions, 20 changer transitions 0/172 dead transitions. [2024-06-03 19:36:06,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 172 transitions, 1484 flow [2024-06-03 19:36:06,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:36:06,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:36:06,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-03 19:36:06,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45185185185185184 [2024-06-03 19:36:06,235 INFO L175 Difference]: Start difference. First operand has 123 places, 140 transitions, 1036 flow. Second operand 9 states and 183 transitions. [2024-06-03 19:36:06,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 172 transitions, 1484 flow [2024-06-03 19:36:06,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 172 transitions, 1424 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-03 19:36:06,286 INFO L231 Difference]: Finished difference. Result has 129 places, 145 transitions, 1085 flow [2024-06-03 19:36:06,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1085, PETRI_PLACES=129, PETRI_TRANSITIONS=145} [2024-06-03 19:36:06,286 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 83 predicate places. [2024-06-03 19:36:06,286 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 145 transitions, 1085 flow [2024-06-03 19:36:06,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:06,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:06,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:06,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:36:06,287 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 19:36:06,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:06,287 INFO L85 PathProgramCache]: Analyzing trace with hash 572773081, now seen corresponding path program 1 times [2024-06-03 19:36:06,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:06,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366932521] [2024-06-03 19:36:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:06,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:07,382 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 19:36:07,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:07,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366932521] [2024-06-03 19:36:07,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366932521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:07,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:07,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:36:07,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431775691] [2024-06-03 19:36:07,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:07,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:36:07,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:07,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:36:07,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:36:07,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:36:07,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 145 transitions, 1085 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:07,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:07,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:36:07,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:08,074 INFO L124 PetriNetUnfolderBase]: 1942/3127 cut-off events. [2024-06-03 19:36:08,074 INFO L125 PetriNetUnfolderBase]: For 139497/139497 co-relation queries the response was YES. [2024-06-03 19:36:08,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20549 conditions, 3127 events. 1942/3127 cut-off events. For 139497/139497 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 16763 event pairs, 579 based on Foata normal form. 1/3125 useless extension candidates. Maximal degree in co-relation 20489. Up to 2840 conditions per place. [2024-06-03 19:36:08,099 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 128 selfloop transitions, 15 changer transitions 0/157 dead transitions. [2024-06-03 19:36:08,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 157 transitions, 1433 flow [2024-06-03 19:36:08,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:36:08,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:36:08,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-03 19:36:08,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:36:08,100 INFO L175 Difference]: Start difference. First operand has 129 places, 145 transitions, 1085 flow. Second operand 7 states and 135 transitions. [2024-06-03 19:36:08,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 157 transitions, 1433 flow [2024-06-03 19:36:08,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 157 transitions, 1364 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 19:36:08,156 INFO L231 Difference]: Finished difference. Result has 130 places, 148 transitions, 1098 flow [2024-06-03 19:36:08,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1098, PETRI_PLACES=130, PETRI_TRANSITIONS=148} [2024-06-03 19:36:08,158 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 84 predicate places. [2024-06-03 19:36:08,158 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 148 transitions, 1098 flow [2024-06-03 19:36:08,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:08,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:08,159 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 19:36:08,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:36:08,159 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 19:36:08,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:08,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1544311904, now seen corresponding path program 1 times [2024-06-03 19:36:08,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:08,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957648623] [2024-06-03 19:36:08,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:08,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:09,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:09,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957648623] [2024-06-03 19:36:09,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957648623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:09,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:09,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:36:09,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244452634] [2024-06-03 19:36:09,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:09,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:36:09,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:09,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:36:09,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:36:09,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:36:09,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 148 transitions, 1098 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:09,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:09,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:36:09,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:09,738 INFO L124 PetriNetUnfolderBase]: 2168/3384 cut-off events. [2024-06-03 19:36:09,739 INFO L125 PetriNetUnfolderBase]: For 172891/172894 co-relation queries the response was YES. [2024-06-03 19:36:09,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23315 conditions, 3384 events. 2168/3384 cut-off events. For 172891/172894 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17636 event pairs, 453 based on Foata normal form. 4/3384 useless extension candidates. Maximal degree in co-relation 23254. Up to 2835 conditions per place. [2024-06-03 19:36:09,768 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 134 selfloop transitions, 41 changer transitions 0/182 dead transitions. [2024-06-03 19:36:09,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 182 transitions, 1706 flow [2024-06-03 19:36:09,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:36:09,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:36:09,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-03 19:36:09,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-03 19:36:09,771 INFO L175 Difference]: Start difference. First operand has 130 places, 148 transitions, 1098 flow. Second operand 8 states and 169 transitions. [2024-06-03 19:36:09,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 182 transitions, 1706 flow [2024-06-03 19:36:09,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 182 transitions, 1646 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 19:36:09,833 INFO L231 Difference]: Finished difference. Result has 133 places, 152 transitions, 1187 flow [2024-06-03 19:36:09,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1187, PETRI_PLACES=133, PETRI_TRANSITIONS=152} [2024-06-03 19:36:09,833 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 87 predicate places. [2024-06-03 19:36:09,833 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 152 transitions, 1187 flow [2024-06-03 19:36:09,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:09,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:09,834 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 19:36:09,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:36:09,834 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 19:36:09,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:09,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1542434234, now seen corresponding path program 2 times [2024-06-03 19:36:09,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:09,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82566375] [2024-06-03 19:36:09,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:09,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:09,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:10,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:10,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82566375] [2024-06-03 19:36:10,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82566375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:10,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:10,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:36:10,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14365225] [2024-06-03 19:36:10,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:10,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:36:10,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:10,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:36:10,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:36:10,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:36:10,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 152 transitions, 1187 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:10,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:10,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:36:10,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:11,688 INFO L124 PetriNetUnfolderBase]: 2185/3411 cut-off events. [2024-06-03 19:36:11,689 INFO L125 PetriNetUnfolderBase]: For 182679/182682 co-relation queries the response was YES. [2024-06-03 19:36:11,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23955 conditions, 3411 events. 2185/3411 cut-off events. For 182679/182682 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17777 event pairs, 625 based on Foata normal form. 4/3411 useless extension candidates. Maximal degree in co-relation 23893. Up to 3015 conditions per place. [2024-06-03 19:36:11,716 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 134 selfloop transitions, 39 changer transitions 0/180 dead transitions. [2024-06-03 19:36:11,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 180 transitions, 1633 flow [2024-06-03 19:36:11,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:36:11,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:36:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-03 19:36:11,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2024-06-03 19:36:11,718 INFO L175 Difference]: Start difference. First operand has 133 places, 152 transitions, 1187 flow. Second operand 8 states and 167 transitions. [2024-06-03 19:36:11,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 180 transitions, 1633 flow [2024-06-03 19:36:11,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 180 transitions, 1553 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 19:36:11,794 INFO L231 Difference]: Finished difference. Result has 137 places, 154 transitions, 1228 flow [2024-06-03 19:36:11,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1228, PETRI_PLACES=137, PETRI_TRANSITIONS=154} [2024-06-03 19:36:11,795 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 91 predicate places. [2024-06-03 19:36:11,795 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 154 transitions, 1228 flow [2024-06-03 19:36:11,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:11,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:11,795 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 19:36:11,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:36:11,795 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 19:36:11,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:11,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1453627226, now seen corresponding path program 3 times [2024-06-03 19:36:11,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:11,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077801649] [2024-06-03 19:36:11,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:11,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:12,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:12,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:12,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077801649] [2024-06-03 19:36:12,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077801649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:12,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:12,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:36:12,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145799364] [2024-06-03 19:36:12,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:12,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:36:12,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:12,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:36:12,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:36:12,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:36:12,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 154 transitions, 1228 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:12,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:12,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:36:12,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:13,476 INFO L124 PetriNetUnfolderBase]: 2202/3438 cut-off events. [2024-06-03 19:36:13,476 INFO L125 PetriNetUnfolderBase]: For 192578/192581 co-relation queries the response was YES. [2024-06-03 19:36:13,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24412 conditions, 3438 events. 2202/3438 cut-off events. For 192578/192581 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17932 event pairs, 625 based on Foata normal form. 4/3438 useless extension candidates. Maximal degree in co-relation 24348. Up to 3001 conditions per place. [2024-06-03 19:36:13,509 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 134 selfloop transitions, 42 changer transitions 0/183 dead transitions. [2024-06-03 19:36:13,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 183 transitions, 1678 flow [2024-06-03 19:36:13,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:36:13,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:36:13,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-03 19:36:13,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-03 19:36:13,511 INFO L175 Difference]: Start difference. First operand has 137 places, 154 transitions, 1228 flow. Second operand 8 states and 168 transitions. [2024-06-03 19:36:13,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 183 transitions, 1678 flow [2024-06-03 19:36:13,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 183 transitions, 1587 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 19:36:13,594 INFO L231 Difference]: Finished difference. Result has 139 places, 156 transitions, 1260 flow [2024-06-03 19:36:13,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1260, PETRI_PLACES=139, PETRI_TRANSITIONS=156} [2024-06-03 19:36:13,595 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 93 predicate places. [2024-06-03 19:36:13,595 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 156 transitions, 1260 flow [2024-06-03 19:36:13,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:13,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:13,595 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 19:36:13,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:36:13,596 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 19:36:13,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:13,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1807243360, now seen corresponding path program 4 times [2024-06-03 19:36:13,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:13,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582279541] [2024-06-03 19:36:13,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:13,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:14,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:14,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582279541] [2024-06-03 19:36:14,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582279541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:14,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:14,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:36:14,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847529911] [2024-06-03 19:36:14,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:14,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:36:14,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:14,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:36:14,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:36:14,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:36:14,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 156 transitions, 1260 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:14,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:14,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:36:14,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:15,313 INFO L124 PetriNetUnfolderBase]: 2219/3465 cut-off events. [2024-06-03 19:36:15,313 INFO L125 PetriNetUnfolderBase]: For 202797/202800 co-relation queries the response was YES. [2024-06-03 19:36:15,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24837 conditions, 3465 events. 2219/3465 cut-off events. For 202797/202800 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18091 event pairs, 458 based on Foata normal form. 4/3465 useless extension candidates. Maximal degree in co-relation 24772. Up to 2982 conditions per place. [2024-06-03 19:36:15,343 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 135 selfloop transitions, 47 changer transitions 0/189 dead transitions. [2024-06-03 19:36:15,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 189 transitions, 1874 flow [2024-06-03 19:36:15,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:36:15,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:36:15,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-03 19:36:15,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-03 19:36:15,345 INFO L175 Difference]: Start difference. First operand has 139 places, 156 transitions, 1260 flow. Second operand 8 states and 174 transitions. [2024-06-03 19:36:15,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 189 transitions, 1874 flow [2024-06-03 19:36:15,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 189 transitions, 1773 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 19:36:15,449 INFO L231 Difference]: Finished difference. Result has 141 places, 158 transitions, 1292 flow [2024-06-03 19:36:15,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1292, PETRI_PLACES=141, PETRI_TRANSITIONS=158} [2024-06-03 19:36:15,449 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 95 predicate places. [2024-06-03 19:36:15,449 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 158 transitions, 1292 flow [2024-06-03 19:36:15,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:15,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:15,450 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 19:36:15,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:36:15,450 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 19:36:15,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:15,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1812753610, now seen corresponding path program 5 times [2024-06-03 19:36:15,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:15,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001397291] [2024-06-03 19:36:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:15,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:16,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:16,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001397291] [2024-06-03 19:36:16,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001397291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:16,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:16,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:36:16,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932162635] [2024-06-03 19:36:16,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:16,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:36:16,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:16,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:36:16,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:36:16,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:36:16,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 158 transitions, 1292 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:16,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:16,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:36:16,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:17,281 INFO L124 PetriNetUnfolderBase]: 2236/3492 cut-off events. [2024-06-03 19:36:17,282 INFO L125 PetriNetUnfolderBase]: For 213254/213257 co-relation queries the response was YES. [2024-06-03 19:36:17,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25267 conditions, 3492 events. 2236/3492 cut-off events. For 213254/213257 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 18246 event pairs, 630 based on Foata normal form. 4/3492 useless extension candidates. Maximal degree in co-relation 25201. Up to 3096 conditions per place. [2024-06-03 19:36:17,310 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 140 selfloop transitions, 39 changer transitions 0/186 dead transitions. [2024-06-03 19:36:17,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 186 transitions, 1754 flow [2024-06-03 19:36:17,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:36:17,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:36:17,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-03 19:36:17,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-03 19:36:17,315 INFO L175 Difference]: Start difference. First operand has 141 places, 158 transitions, 1292 flow. Second operand 8 states and 166 transitions. [2024-06-03 19:36:17,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 186 transitions, 1754 flow [2024-06-03 19:36:17,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 186 transitions, 1627 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 19:36:17,438 INFO L231 Difference]: Finished difference. Result has 143 places, 160 transitions, 1290 flow [2024-06-03 19:36:17,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1290, PETRI_PLACES=143, PETRI_TRANSITIONS=160} [2024-06-03 19:36:17,439 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 97 predicate places. [2024-06-03 19:36:17,439 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 160 transitions, 1290 flow [2024-06-03 19:36:17,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:17,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:17,439 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 19:36:17,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:36:17,439 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 19:36:17,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:17,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1807247080, now seen corresponding path program 6 times [2024-06-03 19:36:17,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:17,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499069325] [2024-06-03 19:36:17,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:17,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:18,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:18,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499069325] [2024-06-03 19:36:18,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499069325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:18,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:18,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:36:18,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963719466] [2024-06-03 19:36:18,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:18,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:36:18,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:18,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:36:18,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:36:18,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:36:18,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 160 transitions, 1290 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:18,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:18,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:36:18,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:19,305 INFO L124 PetriNetUnfolderBase]: 2253/3519 cut-off events. [2024-06-03 19:36:19,305 INFO L125 PetriNetUnfolderBase]: For 223802/223805 co-relation queries the response was YES. [2024-06-03 19:36:19,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25585 conditions, 3519 events. 2253/3519 cut-off events. For 223802/223805 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18439 event pairs, 630 based on Foata normal form. 4/3519 useless extension candidates. Maximal degree in co-relation 25518. Up to 3123 conditions per place. [2024-06-03 19:36:19,333 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 140 selfloop transitions, 43 changer transitions 0/190 dead transitions. [2024-06-03 19:36:19,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 190 transitions, 1766 flow [2024-06-03 19:36:19,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:36:19,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:36:19,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-03 19:36:19,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-03 19:36:19,334 INFO L175 Difference]: Start difference. First operand has 143 places, 160 transitions, 1290 flow. Second operand 8 states and 170 transitions. [2024-06-03 19:36:19,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 190 transitions, 1766 flow [2024-06-03 19:36:19,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 190 transitions, 1667 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 19:36:19,440 INFO L231 Difference]: Finished difference. Result has 145 places, 162 transitions, 1324 flow [2024-06-03 19:36:19,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1324, PETRI_PLACES=145, PETRI_TRANSITIONS=162} [2024-06-03 19:36:19,441 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 99 predicate places. [2024-06-03 19:36:19,441 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 162 transitions, 1324 flow [2024-06-03 19:36:19,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:19,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:19,441 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 19:36:19,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:36:19,442 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:36:19,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:19,442 INFO L85 PathProgramCache]: Analyzing trace with hash 162286049, now seen corresponding path program 1 times [2024-06-03 19:36:19,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:19,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894401593] [2024-06-03 19:36:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:19,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:20,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:20,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894401593] [2024-06-03 19:36:20,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894401593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:20,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:20,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:36:20,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951619356] [2024-06-03 19:36:20,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:20,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:36:20,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:20,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:36:20,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:36:20,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:36:20,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 162 transitions, 1324 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:20,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:20,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:36:20,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:21,070 INFO L124 PetriNetUnfolderBase]: 2133/3405 cut-off events. [2024-06-03 19:36:21,071 INFO L125 PetriNetUnfolderBase]: For 232985/232988 co-relation queries the response was YES. [2024-06-03 19:36:21,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25245 conditions, 3405 events. 2133/3405 cut-off events. For 232985/232988 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18385 event pairs, 620 based on Foata normal form. 4/3405 useless extension candidates. Maximal degree in co-relation 25177. Up to 2972 conditions per place. [2024-06-03 19:36:21,108 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 138 selfloop transitions, 26 changer transitions 0/186 dead transitions. [2024-06-03 19:36:21,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 186 transitions, 1758 flow [2024-06-03 19:36:21,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:36:21,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:36:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-03 19:36:21,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48253968253968255 [2024-06-03 19:36:21,110 INFO L175 Difference]: Start difference. First operand has 145 places, 162 transitions, 1324 flow. Second operand 7 states and 152 transitions. [2024-06-03 19:36:21,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 186 transitions, 1758 flow [2024-06-03 19:36:21,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 186 transitions, 1647 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 19:36:21,237 INFO L231 Difference]: Finished difference. Result has 146 places, 166 transitions, 1332 flow [2024-06-03 19:36:21,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1332, PETRI_PLACES=146, PETRI_TRANSITIONS=166} [2024-06-03 19:36:21,238 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 100 predicate places. [2024-06-03 19:36:21,238 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 166 transitions, 1332 flow [2024-06-03 19:36:21,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:21,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:21,238 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 19:36:21,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:36:21,239 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:36:21,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:21,239 INFO L85 PathProgramCache]: Analyzing trace with hash 528791779, now seen corresponding path program 1 times [2024-06-03 19:36:21,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:21,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569160238] [2024-06-03 19:36:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:21,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:22,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:22,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569160238] [2024-06-03 19:36:22,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569160238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:22,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:22,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:36:22,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110009831] [2024-06-03 19:36:22,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:22,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:36:22,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:22,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:36:22,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:36:22,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:36:22,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 166 transitions, 1332 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 19:36:22,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:22,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:36:22,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:22,765 INFO L124 PetriNetUnfolderBase]: 2271/3544 cut-off events. [2024-06-03 19:36:22,765 INFO L125 PetriNetUnfolderBase]: For 241975/241975 co-relation queries the response was YES. [2024-06-03 19:36:22,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26479 conditions, 3544 events. 2271/3544 cut-off events. For 241975/241975 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18637 event pairs, 663 based on Foata normal form. 1/3542 useless extension candidates. Maximal degree in co-relation 26410. Up to 3281 conditions per place. [2024-06-03 19:36:22,796 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 147 selfloop transitions, 16 changer transitions 0/183 dead transitions. [2024-06-03 19:36:22,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 183 transitions, 1734 flow [2024-06-03 19:36:22,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:36:22,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:36:22,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-03 19:36:22,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:36:22,797 INFO L175 Difference]: Start difference. First operand has 146 places, 166 transitions, 1332 flow. Second operand 7 states and 135 transitions. [2024-06-03 19:36:22,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 183 transitions, 1734 flow [2024-06-03 19:36:22,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 183 transitions, 1643 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 19:36:22,936 INFO L231 Difference]: Finished difference. Result has 148 places, 169 transitions, 1325 flow [2024-06-03 19:36:22,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1325, PETRI_PLACES=148, PETRI_TRANSITIONS=169} [2024-06-03 19:36:22,937 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 102 predicate places. [2024-06-03 19:36:22,937 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 169 transitions, 1325 flow [2024-06-03 19:36:22,937 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 19:36:22,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:22,937 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 19:36:22,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:36:22,938 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:36:22,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:22,938 INFO L85 PathProgramCache]: Analyzing trace with hash 528791345, now seen corresponding path program 2 times [2024-06-03 19:36:22,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:22,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109007482] [2024-06-03 19:36:22,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:22,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:23,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:23,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109007482] [2024-06-03 19:36:23,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109007482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:23,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:23,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:36:23,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037042438] [2024-06-03 19:36:23,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:23,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:36:23,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:23,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:36:23,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:36:24,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:36:24,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 169 transitions, 1325 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:24,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:24,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:36:24,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:24,660 INFO L124 PetriNetUnfolderBase]: 2182/3474 cut-off events. [2024-06-03 19:36:24,660 INFO L125 PetriNetUnfolderBase]: For 256864/256867 co-relation queries the response was YES. [2024-06-03 19:36:24,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26835 conditions, 3474 events. 2182/3474 cut-off events. For 256864/256867 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18731 event pairs, 618 based on Foata normal form. 4/3474 useless extension candidates. Maximal degree in co-relation 26765. Up to 3006 conditions per place. [2024-06-03 19:36:24,691 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 140 selfloop transitions, 30 changer transitions 0/193 dead transitions. [2024-06-03 19:36:24,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 193 transitions, 1909 flow [2024-06-03 19:36:24,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:36:24,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:36:24,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-03 19:36:24,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46984126984126984 [2024-06-03 19:36:24,693 INFO L175 Difference]: Start difference. First operand has 148 places, 169 transitions, 1325 flow. Second operand 7 states and 148 transitions. [2024-06-03 19:36:24,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 193 transitions, 1909 flow [2024-06-03 19:36:24,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 193 transitions, 1847 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 19:36:24,832 INFO L231 Difference]: Finished difference. Result has 151 places, 177 transitions, 1471 flow [2024-06-03 19:36:24,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1471, PETRI_PLACES=151, PETRI_TRANSITIONS=177} [2024-06-03 19:36:24,833 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 105 predicate places. [2024-06-03 19:36:24,833 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 177 transitions, 1471 flow [2024-06-03 19:36:24,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:24,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:24,833 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 19:36:24,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:36:24,834 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 19:36:24,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:24,834 INFO L85 PathProgramCache]: Analyzing trace with hash 180622188, now seen corresponding path program 7 times [2024-06-03 19:36:24,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:24,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892565209] [2024-06-03 19:36:24,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:24,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:25,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:25,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892565209] [2024-06-03 19:36:25,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892565209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:25,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:25,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:36:25,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719327350] [2024-06-03 19:36:25,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:25,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:36:25,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:25,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:36:25,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:36:25,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:36:25,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 177 transitions, 1471 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:25,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:25,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:36:25,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:26,652 INFO L124 PetriNetUnfolderBase]: 2304/3593 cut-off events. [2024-06-03 19:36:26,652 INFO L125 PetriNetUnfolderBase]: For 270045/270048 co-relation queries the response was YES. [2024-06-03 19:36:26,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28197 conditions, 3593 events. 2304/3593 cut-off events. For 270045/270048 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18871 event pairs, 651 based on Foata normal form. 6/3591 useless extension candidates. Maximal degree in co-relation 28125. Up to 3185 conditions per place. [2024-06-03 19:36:26,681 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 157 selfloop transitions, 36 changer transitions 0/201 dead transitions. [2024-06-03 19:36:26,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 201 transitions, 1919 flow [2024-06-03 19:36:26,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:36:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:36:26,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-03 19:36:26,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-03 19:36:26,686 INFO L175 Difference]: Start difference. First operand has 151 places, 177 transitions, 1471 flow. Second operand 8 states and 162 transitions. [2024-06-03 19:36:26,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 201 transitions, 1919 flow [2024-06-03 19:36:26,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 201 transitions, 1812 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-03 19:36:26,845 INFO L231 Difference]: Finished difference. Result has 156 places, 177 transitions, 1443 flow [2024-06-03 19:36:26,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1443, PETRI_PLACES=156, PETRI_TRANSITIONS=177} [2024-06-03 19:36:26,847 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 110 predicate places. [2024-06-03 19:36:26,847 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 177 transitions, 1443 flow [2024-06-03 19:36:26,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:26,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:26,847 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 19:36:26,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:36:26,848 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:36:26,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:26,848 INFO L85 PathProgramCache]: Analyzing trace with hash 573226869, now seen corresponding path program 2 times [2024-06-03 19:36:26,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:26,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817436979] [2024-06-03 19:36:26,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:26,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:28,062 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 19:36:28,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:28,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817436979] [2024-06-03 19:36:28,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817436979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:28,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:28,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:36:28,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747365383] [2024-06-03 19:36:28,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:28,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:36:28,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:28,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:36:28,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:36:28,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:36:28,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 177 transitions, 1443 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 19:36:28,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:28,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:36:28,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:28,791 INFO L124 PetriNetUnfolderBase]: 2296/3587 cut-off events. [2024-06-03 19:36:28,792 INFO L125 PetriNetUnfolderBase]: For 277410/277413 co-relation queries the response was YES. [2024-06-03 19:36:28,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28386 conditions, 3587 events. 2296/3587 cut-off events. For 277410/277413 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18918 event pairs, 668 based on Foata normal form. 3/3585 useless extension candidates. Maximal degree in co-relation 28312. Up to 3303 conditions per place. [2024-06-03 19:36:28,821 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 146 selfloop transitions, 27 changer transitions 0/193 dead transitions. [2024-06-03 19:36:28,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 193 transitions, 2003 flow [2024-06-03 19:36:28,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:36:28,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:36:28,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-03 19:36:28,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253968253968254 [2024-06-03 19:36:28,822 INFO L175 Difference]: Start difference. First operand has 156 places, 177 transitions, 1443 flow. Second operand 7 states and 134 transitions. [2024-06-03 19:36:28,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 193 transitions, 2003 flow [2024-06-03 19:36:29,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 193 transitions, 1909 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 19:36:29,028 INFO L231 Difference]: Finished difference. Result has 156 places, 183 transitions, 1515 flow [2024-06-03 19:36:29,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1515, PETRI_PLACES=156, PETRI_TRANSITIONS=183} [2024-06-03 19:36:29,028 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 110 predicate places. [2024-06-03 19:36:29,029 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 183 transitions, 1515 flow [2024-06-03 19:36:29,029 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 19:36:29,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:29,029 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 19:36:29,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 19:36:29,029 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 19:36:29,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:29,030 INFO L85 PathProgramCache]: Analyzing trace with hash 575605019, now seen corresponding path program 3 times [2024-06-03 19:36:29,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:29,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981493099] [2024-06-03 19:36:29,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:29,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:29,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:29,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981493099] [2024-06-03 19:36:29,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981493099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:29,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:29,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:36:29,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787216625] [2024-06-03 19:36:29,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:29,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:36:29,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:29,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:36:29,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:36:30,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:36:30,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 183 transitions, 1515 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:30,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:30,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:36:30,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:30,578 INFO L124 PetriNetUnfolderBase]: 2183/3477 cut-off events. [2024-06-03 19:36:30,578 INFO L125 PetriNetUnfolderBase]: For 291570/291573 co-relation queries the response was YES. [2024-06-03 19:36:30,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28318 conditions, 3477 events. 2183/3477 cut-off events. For 291570/291573 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18742 event pairs, 643 based on Foata normal form. 4/3473 useless extension candidates. Maximal degree in co-relation 28243. Up to 2978 conditions per place. [2024-06-03 19:36:30,608 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 136 selfloop transitions, 42 changer transitions 0/203 dead transitions. [2024-06-03 19:36:30,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 203 transitions, 2221 flow [2024-06-03 19:36:30,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:36:30,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:36:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-03 19:36:30,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634920634920635 [2024-06-03 19:36:30,610 INFO L175 Difference]: Start difference. First operand has 156 places, 183 transitions, 1515 flow. Second operand 7 states and 146 transitions. [2024-06-03 19:36:30,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 203 transitions, 2221 flow [2024-06-03 19:36:30,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 203 transitions, 2152 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-03 19:36:30,782 INFO L231 Difference]: Finished difference. Result has 161 places, 191 transitions, 1694 flow [2024-06-03 19:36:30,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1694, PETRI_PLACES=161, PETRI_TRANSITIONS=191} [2024-06-03 19:36:30,782 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 115 predicate places. [2024-06-03 19:36:30,782 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 191 transitions, 1694 flow [2024-06-03 19:36:30,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:30,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:30,783 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 19:36:30,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 19:36:30,783 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:36:30,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:30,783 INFO L85 PathProgramCache]: Analyzing trace with hash 576080683, now seen corresponding path program 3 times [2024-06-03 19:36:30,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:30,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99907657] [2024-06-03 19:36:30,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:30,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:31,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:31,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99907657] [2024-06-03 19:36:31,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99907657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:31,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:31,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:36:31,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465283263] [2024-06-03 19:36:31,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:31,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:36:31,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:31,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:36:31,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:36:31,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:36:31,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 191 transitions, 1694 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 19:36:31,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:31,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:36:31,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:32,369 INFO L124 PetriNetUnfolderBase]: 2297/3590 cut-off events. [2024-06-03 19:36:32,369 INFO L125 PetriNetUnfolderBase]: For 303825/303828 co-relation queries the response was YES. [2024-06-03 19:36:32,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29732 conditions, 3590 events. 2297/3590 cut-off events. For 303825/303828 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18992 event pairs, 667 based on Foata normal form. 3/3588 useless extension candidates. Maximal degree in co-relation 29654. Up to 3306 conditions per place. [2024-06-03 19:36:32,407 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 152 selfloop transitions, 28 changer transitions 0/200 dead transitions. [2024-06-03 19:36:32,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 200 transitions, 2076 flow [2024-06-03 19:36:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:36:32,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:36:32,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-03 19:36:32,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-03 19:36:32,408 INFO L175 Difference]: Start difference. First operand has 161 places, 191 transitions, 1694 flow. Second operand 7 states and 132 transitions. [2024-06-03 19:36:32,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 200 transitions, 2076 flow [2024-06-03 19:36:32,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 200 transitions, 1892 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-03 19:36:32,676 INFO L231 Difference]: Finished difference. Result has 164 places, 191 transitions, 1572 flow [2024-06-03 19:36:32,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1510, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1572, PETRI_PLACES=164, PETRI_TRANSITIONS=191} [2024-06-03 19:36:32,677 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 118 predicate places. [2024-06-03 19:36:32,677 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 191 transitions, 1572 flow [2024-06-03 19:36:32,677 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 19:36:32,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:32,677 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 19:36:32,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 19:36:32,678 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:36:32,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:32,678 INFO L85 PathProgramCache]: Analyzing trace with hash 211841809, now seen corresponding path program 1 times [2024-06-03 19:36:32,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:32,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071661580] [2024-06-03 19:36:32,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:32,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:33,393 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 19:36:33,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:33,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071661580] [2024-06-03 19:36:33,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071661580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:33,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:33,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:36:33,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202731368] [2024-06-03 19:36:33,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:33,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:36:33,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:33,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:36:33,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:36:33,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:36:33,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 191 transitions, 1572 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:33,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:33,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:36:33,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:34,060 INFO L124 PetriNetUnfolderBase]: 2074/3345 cut-off events. [2024-06-03 19:36:34,061 INFO L125 PetriNetUnfolderBase]: For 270782/270782 co-relation queries the response was YES. [2024-06-03 19:36:34,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26484 conditions, 3345 events. 2074/3345 cut-off events. For 270782/270782 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18066 event pairs, 529 based on Foata normal form. 1/3343 useless extension candidates. Maximal degree in co-relation 26405. Up to 3009 conditions per place. [2024-06-03 19:36:34,091 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 183 selfloop transitions, 15 changer transitions 0/209 dead transitions. [2024-06-03 19:36:34,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 209 transitions, 2052 flow [2024-06-03 19:36:34,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:36:34,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:36:34,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-03 19:36:34,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-03 19:36:34,092 INFO L175 Difference]: Start difference. First operand has 164 places, 191 transitions, 1572 flow. Second operand 7 states and 141 transitions. [2024-06-03 19:36:34,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 209 transitions, 2052 flow [2024-06-03 19:36:34,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 209 transitions, 1988 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 19:36:34,301 INFO L231 Difference]: Finished difference. Result has 165 places, 194 transitions, 1596 flow [2024-06-03 19:36:34,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1596, PETRI_PLACES=165, PETRI_TRANSITIONS=194} [2024-06-03 19:36:34,302 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 119 predicate places. [2024-06-03 19:36:34,302 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 194 transitions, 1596 flow [2024-06-03 19:36:34,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:34,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:34,302 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 19:36:34,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 19:36:34,303 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:36:34,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:34,303 INFO L85 PathProgramCache]: Analyzing trace with hash 565137171, now seen corresponding path program 1 times [2024-06-03 19:36:34,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:34,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073554360] [2024-06-03 19:36:34,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:34,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:35,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:35,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073554360] [2024-06-03 19:36:35,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073554360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:35,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:35,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:36:35,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171910697] [2024-06-03 19:36:35,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:35,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:36:35,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:35,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:36:35,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:36:35,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:36:35,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 194 transitions, 1596 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:35,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:35,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:36:35,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:35,766 INFO L124 PetriNetUnfolderBase]: 2091/3364 cut-off events. [2024-06-03 19:36:35,766 INFO L125 PetriNetUnfolderBase]: For 279989/279989 co-relation queries the response was YES. [2024-06-03 19:36:35,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26987 conditions, 3364 events. 2091/3364 cut-off events. For 279989/279989 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18214 event pairs, 571 based on Foata normal form. 1/3362 useless extension candidates. Maximal degree in co-relation 26907. Up to 3009 conditions per place. [2024-06-03 19:36:35,799 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 172 selfloop transitions, 15 changer transitions 0/209 dead transitions. [2024-06-03 19:36:35,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 209 transitions, 2048 flow [2024-06-03 19:36:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:36:35,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:36:35,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-03 19:36:35,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-03 19:36:35,800 INFO L175 Difference]: Start difference. First operand has 165 places, 194 transitions, 1596 flow. Second operand 7 states and 138 transitions. [2024-06-03 19:36:35,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 209 transitions, 2048 flow [2024-06-03 19:36:36,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 209 transitions, 1982 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 19:36:36,039 INFO L231 Difference]: Finished difference. Result has 167 places, 197 transitions, 1620 flow [2024-06-03 19:36:36,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1530, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1620, PETRI_PLACES=167, PETRI_TRANSITIONS=197} [2024-06-03 19:36:36,039 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 121 predicate places. [2024-06-03 19:36:36,039 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 197 transitions, 1620 flow [2024-06-03 19:36:36,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:36,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:36,040 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 19:36:36,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 19:36:36,040 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:36:36,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:36,040 INFO L85 PathProgramCache]: Analyzing trace with hash 339614357, now seen corresponding path program 2 times [2024-06-03 19:36:36,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:36,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016802925] [2024-06-03 19:36:36,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:36,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:36,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:36,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016802925] [2024-06-03 19:36:36,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016802925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:36,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:36,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:36:36,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792443880] [2024-06-03 19:36:36,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:36,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:36:36,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:36,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:36:36,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:36:36,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:36:36,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 197 transitions, 1620 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:36,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:36,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:36:36,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:37,517 INFO L124 PetriNetUnfolderBase]: 2094/3369 cut-off events. [2024-06-03 19:36:37,517 INFO L125 PetriNetUnfolderBase]: For 292666/292666 co-relation queries the response was YES. [2024-06-03 19:36:37,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27646 conditions, 3369 events. 2094/3369 cut-off events. For 292666/292666 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18125 event pairs, 528 based on Foata normal form. 1/3367 useless extension candidates. Maximal degree in co-relation 27565. Up to 3025 conditions per place. [2024-06-03 19:36:37,551 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 180 selfloop transitions, 20 changer transitions 0/212 dead transitions. [2024-06-03 19:36:37,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 212 transitions, 2104 flow [2024-06-03 19:36:37,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:36:37,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:36:37,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-03 19:36:37,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:36:37,552 INFO L175 Difference]: Start difference. First operand has 167 places, 197 transitions, 1620 flow. Second operand 7 states and 140 transitions. [2024-06-03 19:36:37,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 212 transitions, 2104 flow [2024-06-03 19:36:37,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 212 transitions, 2036 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 19:36:37,769 INFO L231 Difference]: Finished difference. Result has 169 places, 200 transitions, 1658 flow [2024-06-03 19:36:37,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1658, PETRI_PLACES=169, PETRI_TRANSITIONS=200} [2024-06-03 19:36:37,769 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 123 predicate places. [2024-06-03 19:36:37,769 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 200 transitions, 1658 flow [2024-06-03 19:36:37,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:37,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:37,770 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 19:36:37,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 19:36:37,770 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:36:37,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:37,771 INFO L85 PathProgramCache]: Analyzing trace with hash 573708051, now seen corresponding path program 2 times [2024-06-03 19:36:37,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:37,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314411157] [2024-06-03 19:36:37,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:37,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:38,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:38,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314411157] [2024-06-03 19:36:38,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314411157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:38,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:38,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:36:38,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168742336] [2024-06-03 19:36:38,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:38,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:36:38,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:38,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:36:38,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:36:38,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:36:38,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 200 transitions, 1658 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:38,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:38,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:36:38,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:39,292 INFO L124 PetriNetUnfolderBase]: 2101/3379 cut-off events. [2024-06-03 19:36:39,292 INFO L125 PetriNetUnfolderBase]: For 302093/302096 co-relation queries the response was YES. [2024-06-03 19:36:39,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28024 conditions, 3379 events. 2101/3379 cut-off events. For 302093/302096 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18296 event pairs, 575 based on Foata normal form. 3/3378 useless extension candidates. Maximal degree in co-relation 27942. Up to 3005 conditions per place. [2024-06-03 19:36:39,326 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 165 selfloop transitions, 28 changer transitions 0/216 dead transitions. [2024-06-03 19:36:39,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 216 transitions, 2282 flow [2024-06-03 19:36:39,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:36:39,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:36:39,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-03 19:36:39,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44126984126984126 [2024-06-03 19:36:39,327 INFO L175 Difference]: Start difference. First operand has 169 places, 200 transitions, 1658 flow. Second operand 7 states and 139 transitions. [2024-06-03 19:36:39,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 216 transitions, 2282 flow [2024-06-03 19:36:39,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 216 transitions, 2198 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-03 19:36:39,551 INFO L231 Difference]: Finished difference. Result has 171 places, 206 transitions, 1754 flow [2024-06-03 19:36:39,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1754, PETRI_PLACES=171, PETRI_TRANSITIONS=206} [2024-06-03 19:36:39,552 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 125 predicate places. [2024-06-03 19:36:39,552 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 206 transitions, 1754 flow [2024-06-03 19:36:39,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:39,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:39,552 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 19:36:39,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 19:36:39,553 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:36:39,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:39,553 INFO L85 PathProgramCache]: Analyzing trace with hash 575789965, now seen corresponding path program 3 times [2024-06-03 19:36:39,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:39,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324951083] [2024-06-03 19:36:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:39,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:40,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:40,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324951083] [2024-06-03 19:36:40,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324951083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:40,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:40,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:36:40,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025829622] [2024-06-03 19:36:40,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:40,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:36:40,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:40,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:36:40,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:36:40,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:36:40,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 206 transitions, 1754 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:40,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:40,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:36:40,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:41,241 INFO L124 PetriNetUnfolderBase]: 2098/3375 cut-off events. [2024-06-03 19:36:41,245 INFO L125 PetriNetUnfolderBase]: For 313275/313278 co-relation queries the response was YES. [2024-06-03 19:36:41,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28412 conditions, 3375 events. 2098/3375 cut-off events. For 313275/313278 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18254 event pairs, 575 based on Foata normal form. 3/3374 useless extension candidates. Maximal degree in co-relation 28329. Up to 3002 conditions per place. [2024-06-03 19:36:41,273 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 165 selfloop transitions, 27 changer transitions 0/215 dead transitions. [2024-06-03 19:36:41,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 215 transitions, 2160 flow [2024-06-03 19:36:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:36:41,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:36:41,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-03 19:36:41,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44126984126984126 [2024-06-03 19:36:41,275 INFO L175 Difference]: Start difference. First operand has 171 places, 206 transitions, 1754 flow. Second operand 7 states and 139 transitions. [2024-06-03 19:36:41,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 215 transitions, 2160 flow [2024-06-03 19:36:41,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 215 transitions, 2044 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-03 19:36:41,498 INFO L231 Difference]: Finished difference. Result has 174 places, 206 transitions, 1698 flow [2024-06-03 19:36:41,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1638, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1698, PETRI_PLACES=174, PETRI_TRANSITIONS=206} [2024-06-03 19:36:41,499 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 128 predicate places. [2024-06-03 19:36:41,499 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 206 transitions, 1698 flow [2024-06-03 19:36:41,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:41,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:41,499 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 19:36:41,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 19:36:41,500 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:36:41,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:41,500 INFO L85 PathProgramCache]: Analyzing trace with hash 575789717, now seen corresponding path program 3 times [2024-06-03 19:36:41,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:41,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959726151] [2024-06-03 19:36:41,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:41,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:42,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:42,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959726151] [2024-06-03 19:36:42,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959726151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:42,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:42,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:36:42,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854881226] [2024-06-03 19:36:42,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:42,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:36:42,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:42,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:36:42,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:36:42,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:36:42,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 206 transitions, 1698 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:42,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:42,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:36:42,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:43,075 INFO L124 PetriNetUnfolderBase]: 2093/3369 cut-off events. [2024-06-03 19:36:43,076 INFO L125 PetriNetUnfolderBase]: For 321901/321904 co-relation queries the response was YES. [2024-06-03 19:36:43,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28546 conditions, 3369 events. 2093/3369 cut-off events. For 321901/321904 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18184 event pairs, 536 based on Foata normal form. 1/3366 useless extension candidates. Maximal degree in co-relation 28462. Up to 3014 conditions per place. [2024-06-03 19:36:43,106 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 177 selfloop transitions, 27 changer transitions 0/218 dead transitions. [2024-06-03 19:36:43,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 218 transitions, 2188 flow [2024-06-03 19:36:43,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:36:43,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:36:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-03 19:36:43,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44126984126984126 [2024-06-03 19:36:43,107 INFO L175 Difference]: Start difference. First operand has 174 places, 206 transitions, 1698 flow. Second operand 7 states and 139 transitions. [2024-06-03 19:36:43,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 218 transitions, 2188 flow [2024-06-03 19:36:43,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 218 transitions, 2114 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 19:36:43,332 INFO L231 Difference]: Finished difference. Result has 175 places, 209 transitions, 1750 flow [2024-06-03 19:36:43,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1624, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1750, PETRI_PLACES=175, PETRI_TRANSITIONS=209} [2024-06-03 19:36:43,333 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 129 predicate places. [2024-06-03 19:36:43,333 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 209 transitions, 1750 flow [2024-06-03 19:36:43,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:43,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:43,333 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 19:36:43,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 19:36:43,334 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 19:36:43,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:43,334 INFO L85 PathProgramCache]: Analyzing trace with hash 950802349, now seen corresponding path program 1 times [2024-06-03 19:36:43,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:43,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288912118] [2024-06-03 19:36:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:43,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:44,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:44,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288912118] [2024-06-03 19:36:44,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288912118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:44,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:44,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:44,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350686893] [2024-06-03 19:36:44,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:44,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:44,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:44,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:44,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:44,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:36:44,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 209 transitions, 1750 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:36:44,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:44,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:36:44,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:45,356 INFO L124 PetriNetUnfolderBase]: 2488/3884 cut-off events. [2024-06-03 19:36:45,357 INFO L125 PetriNetUnfolderBase]: For 428026/428045 co-relation queries the response was YES. [2024-06-03 19:36:45,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34363 conditions, 3884 events. 2488/3884 cut-off events. For 428026/428045 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 20647 event pairs, 423 based on Foata normal form. 16/3892 useless extension candidates. Maximal degree in co-relation 34278. Up to 2555 conditions per place. [2024-06-03 19:36:45,395 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 170 selfloop transitions, 72 changer transitions 0/255 dead transitions. [2024-06-03 19:36:45,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 255 transitions, 2610 flow [2024-06-03 19:36:45,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:36:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:36:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-03 19:36:45,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-03 19:36:45,401 INFO L175 Difference]: Start difference. First operand has 175 places, 209 transitions, 1750 flow. Second operand 9 states and 198 transitions. [2024-06-03 19:36:45,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 255 transitions, 2610 flow [2024-06-03 19:36:45,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 255 transitions, 2506 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-03 19:36:45,674 INFO L231 Difference]: Finished difference. Result has 179 places, 211 transitions, 1846 flow [2024-06-03 19:36:45,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1846, PETRI_PLACES=179, PETRI_TRANSITIONS=211} [2024-06-03 19:36:45,675 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 133 predicate places. [2024-06-03 19:36:45,675 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 211 transitions, 1846 flow [2024-06-03 19:36:45,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:36:45,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:45,675 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 19:36:45,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 19:36:45,676 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 19:36:45,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:45,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1069067659, now seen corresponding path program 2 times [2024-06-03 19:36:45,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:45,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559623471] [2024-06-03 19:36:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:45,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:46,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:46,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559623471] [2024-06-03 19:36:46,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559623471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:46,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:46,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:46,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54659638] [2024-06-03 19:36:46,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:46,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:46,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:46,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:46,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:46,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:36:46,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 211 transitions, 1846 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:36:46,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:46,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:36:46,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:47,833 INFO L124 PetriNetUnfolderBase]: 2584/4058 cut-off events. [2024-06-03 19:36:47,833 INFO L125 PetriNetUnfolderBase]: For 451259/451262 co-relation queries the response was YES. [2024-06-03 19:36:47,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35846 conditions, 4058 events. 2584/4058 cut-off events. For 451259/451262 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 22060 event pairs, 655 based on Foata normal form. 24/4078 useless extension candidates. Maximal degree in co-relation 35760. Up to 3260 conditions per place. [2024-06-03 19:36:47,871 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 170 selfloop transitions, 66 changer transitions 0/249 dead transitions. [2024-06-03 19:36:47,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 249 transitions, 2476 flow [2024-06-03 19:36:47,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:36:47,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:36:47,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-03 19:36:47,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-03 19:36:47,873 INFO L175 Difference]: Start difference. First operand has 179 places, 211 transitions, 1846 flow. Second operand 9 states and 195 transitions. [2024-06-03 19:36:47,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 249 transitions, 2476 flow [2024-06-03 19:36:48,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 249 transitions, 2388 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 19:36:48,175 INFO L231 Difference]: Finished difference. Result has 183 places, 213 transitions, 1950 flow [2024-06-03 19:36:48,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1950, PETRI_PLACES=183, PETRI_TRANSITIONS=213} [2024-06-03 19:36:48,176 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 137 predicate places. [2024-06-03 19:36:48,176 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 213 transitions, 1950 flow [2024-06-03 19:36:48,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:36:48,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:48,176 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 19:36:48,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 19:36:48,177 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 19:36:48,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:48,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1068890029, now seen corresponding path program 3 times [2024-06-03 19:36:48,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:48,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182378810] [2024-06-03 19:36:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:48,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:49,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:49,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182378810] [2024-06-03 19:36:49,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182378810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:49,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:49,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:49,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403726056] [2024-06-03 19:36:49,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:49,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:49,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:49,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:49,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:49,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:36:49,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 213 transitions, 1950 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:36:49,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:49,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:36:49,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:50,232 INFO L124 PetriNetUnfolderBase]: 2642/4166 cut-off events. [2024-06-03 19:36:50,232 INFO L125 PetriNetUnfolderBase]: For 462087/462090 co-relation queries the response was YES. [2024-06-03 19:36:50,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36989 conditions, 4166 events. 2642/4166 cut-off events. For 462087/462090 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 22923 event pairs, 655 based on Foata normal form. 16/4178 useless extension candidates. Maximal degree in co-relation 36901. Up to 3248 conditions per place. [2024-06-03 19:36:50,272 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 173 selfloop transitions, 68 changer transitions 0/254 dead transitions. [2024-06-03 19:36:50,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 254 transitions, 2584 flow [2024-06-03 19:36:50,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:36:50,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:36:50,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-03 19:36:50,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-03 19:36:50,274 INFO L175 Difference]: Start difference. First operand has 183 places, 213 transitions, 1950 flow. Second operand 9 states and 198 transitions. [2024-06-03 19:36:50,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 254 transitions, 2584 flow [2024-06-03 19:36:50,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 254 transitions, 2422 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-03 19:36:50,644 INFO L231 Difference]: Finished difference. Result has 185 places, 214 transitions, 1960 flow [2024-06-03 19:36:50,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1960, PETRI_PLACES=185, PETRI_TRANSITIONS=214} [2024-06-03 19:36:50,645 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 139 predicate places. [2024-06-03 19:36:50,645 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 214 transitions, 1960 flow [2024-06-03 19:36:50,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:36:50,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:50,645 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 19:36:50,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 19:36:50,646 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 19:36:50,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:50,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1623140051, now seen corresponding path program 4 times [2024-06-03 19:36:50,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:50,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866813406] [2024-06-03 19:36:50,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:50,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:51,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:51,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866813406] [2024-06-03 19:36:51,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866813406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:51,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:51,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:51,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434743861] [2024-06-03 19:36:51,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:51,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:51,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:51,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:51,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:51,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:36:51,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 214 transitions, 1960 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:36:51,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:51,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:36:51,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:52,769 INFO L124 PetriNetUnfolderBase]: 2700/4274 cut-off events. [2024-06-03 19:36:52,769 INFO L125 PetriNetUnfolderBase]: For 478580/478583 co-relation queries the response was YES. [2024-06-03 19:36:52,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37567 conditions, 4274 events. 2700/4274 cut-off events. For 478580/478583 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 23745 event pairs, 670 based on Foata normal form. 16/4286 useless extension candidates. Maximal degree in co-relation 37478. Up to 3213 conditions per place. [2024-06-03 19:36:52,813 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 172 selfloop transitions, 71 changer transitions 0/256 dead transitions. [2024-06-03 19:36:52,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 256 transitions, 2602 flow [2024-06-03 19:36:52,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:36:52,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:36:52,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-03 19:36:52,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49135802469135803 [2024-06-03 19:36:52,815 INFO L175 Difference]: Start difference. First operand has 185 places, 214 transitions, 1960 flow. Second operand 9 states and 199 transitions. [2024-06-03 19:36:52,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 256 transitions, 2602 flow [2024-06-03 19:36:53,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 256 transitions, 2448 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 19:36:53,139 INFO L231 Difference]: Finished difference. Result has 187 places, 215 transitions, 1986 flow [2024-06-03 19:36:53,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1806, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1986, PETRI_PLACES=187, PETRI_TRANSITIONS=215} [2024-06-03 19:36:53,140 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 141 predicate places. [2024-06-03 19:36:53,140 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 215 transitions, 1986 flow [2024-06-03 19:36:53,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:36:53,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:53,140 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 19:36:53,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 19:36:53,141 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 19:36:53,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:53,142 INFO L85 PathProgramCache]: Analyzing trace with hash 471590607, now seen corresponding path program 5 times [2024-06-03 19:36:53,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:53,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677172537] [2024-06-03 19:36:53,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:53,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:53,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:54,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:54,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677172537] [2024-06-03 19:36:54,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677172537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:54,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:54,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:54,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988998143] [2024-06-03 19:36:54,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:54,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:54,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:54,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:54,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:54,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:36:54,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 215 transitions, 1986 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:36:54,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:54,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:36:54,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:55,113 INFO L124 PetriNetUnfolderBase]: 2819/4485 cut-off events. [2024-06-03 19:36:55,113 INFO L125 PetriNetUnfolderBase]: For 511432/511435 co-relation queries the response was YES. [2024-06-03 19:36:55,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39403 conditions, 4485 events. 2819/4485 cut-off events. For 511432/511435 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 25399 event pairs, 541 based on Foata normal form. 16/4497 useless extension candidates. Maximal degree in co-relation 39313. Up to 3307 conditions per place. [2024-06-03 19:36:55,163 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 170 selfloop transitions, 79 changer transitions 0/262 dead transitions. [2024-06-03 19:36:55,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 262 transitions, 2878 flow [2024-06-03 19:36:55,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:36:55,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:36:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-03 19:36:55,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037037037037037 [2024-06-03 19:36:55,169 INFO L175 Difference]: Start difference. First operand has 187 places, 215 transitions, 1986 flow. Second operand 9 states and 204 transitions. [2024-06-03 19:36:55,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 262 transitions, 2878 flow [2024-06-03 19:36:55,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 262 transitions, 2716 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 19:36:55,530 INFO L231 Difference]: Finished difference. Result has 189 places, 217 transitions, 2054 flow [2024-06-03 19:36:55,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2054, PETRI_PLACES=189, PETRI_TRANSITIONS=217} [2024-06-03 19:36:55,531 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 143 predicate places. [2024-06-03 19:36:55,531 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 217 transitions, 2054 flow [2024-06-03 19:36:55,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:36:55,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:55,531 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 19:36:55,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 19:36:55,531 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 19:36:55,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:55,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1194575003, now seen corresponding path program 6 times [2024-06-03 19:36:55,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:55,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994173334] [2024-06-03 19:36:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:55,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:56,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:56,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994173334] [2024-06-03 19:36:56,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994173334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:56,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:56,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:56,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256015813] [2024-06-03 19:36:56,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:56,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:56,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:56,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:56,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:56,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:36:56,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 217 transitions, 2054 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:36:56,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:56,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:36:56,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:57,604 INFO L124 PetriNetUnfolderBase]: 2894/4610 cut-off events. [2024-06-03 19:36:57,604 INFO L125 PetriNetUnfolderBase]: For 535305/535308 co-relation queries the response was YES. [2024-06-03 19:36:57,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40287 conditions, 4610 events. 2894/4610 cut-off events. For 535305/535308 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26339 event pairs, 744 based on Foata normal form. 20/4626 useless extension candidates. Maximal degree in co-relation 40196. Up to 3800 conditions per place. [2024-06-03 19:36:57,652 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 175 selfloop transitions, 67 changer transitions 0/255 dead transitions. [2024-06-03 19:36:57,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 255 transitions, 2686 flow [2024-06-03 19:36:57,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:36:57,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:36:57,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-03 19:36:57,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47901234567901235 [2024-06-03 19:36:57,654 INFO L175 Difference]: Start difference. First operand has 189 places, 217 transitions, 2054 flow. Second operand 9 states and 194 transitions. [2024-06-03 19:36:57,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 255 transitions, 2686 flow [2024-06-03 19:36:58,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 255 transitions, 2571 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 19:36:58,118 INFO L231 Difference]: Finished difference. Result has 193 places, 218 transitions, 2116 flow [2024-06-03 19:36:58,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2116, PETRI_PLACES=193, PETRI_TRANSITIONS=218} [2024-06-03 19:36:58,119 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 147 predicate places. [2024-06-03 19:36:58,119 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 218 transitions, 2116 flow [2024-06-03 19:36:58,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:36:58,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:58,119 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 19:36:58,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 19:36:58,119 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 19:36:58,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:58,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1413171267, now seen corresponding path program 7 times [2024-06-03 19:36:58,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:58,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427618713] [2024-06-03 19:36:58,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:58,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:59,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:59,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427618713] [2024-06-03 19:36:59,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427618713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:59,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:59,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:59,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165505927] [2024-06-03 19:36:59,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:59,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:59,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:59,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:59,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:59,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:36:59,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 218 transitions, 2116 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:36:59,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:59,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:36:59,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:00,371 INFO L124 PetriNetUnfolderBase]: 2969/4745 cut-off events. [2024-06-03 19:37:00,372 INFO L125 PetriNetUnfolderBase]: For 553960/553963 co-relation queries the response was YES. [2024-06-03 19:37:00,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41381 conditions, 4745 events. 2969/4745 cut-off events. For 553960/553963 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 27494 event pairs, 768 based on Foata normal form. 20/4761 useless extension candidates. Maximal degree in co-relation 41288. Up to 3925 conditions per place. [2024-06-03 19:37:00,415 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 178 selfloop transitions, 66 changer transitions 0/257 dead transitions. [2024-06-03 19:37:00,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 257 transitions, 2758 flow [2024-06-03 19:37:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:37:00,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:37:00,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-03 19:37:00,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4839506172839506 [2024-06-03 19:37:00,417 INFO L175 Difference]: Start difference. First operand has 193 places, 218 transitions, 2116 flow. Second operand 9 states and 196 transitions. [2024-06-03 19:37:00,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 257 transitions, 2758 flow [2024-06-03 19:37:00,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 257 transitions, 2607 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 19:37:00,775 INFO L231 Difference]: Finished difference. Result has 195 places, 219 transitions, 2142 flow [2024-06-03 19:37:00,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1965, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2142, PETRI_PLACES=195, PETRI_TRANSITIONS=219} [2024-06-03 19:37:00,776 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 149 predicate places. [2024-06-03 19:37:00,776 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 219 transitions, 2142 flow [2024-06-03 19:37:00,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:37:00,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:00,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:00,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 19:37:00,777 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:37:00,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:00,777 INFO L85 PathProgramCache]: Analyzing trace with hash 642408357, now seen corresponding path program 8 times [2024-06-03 19:37:00,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:00,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91691070] [2024-06-03 19:37:00,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:00,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:01,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:01,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91691070] [2024-06-03 19:37:01,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91691070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:01,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:01,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:37:01,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476310875] [2024-06-03 19:37:01,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:01,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:37:01,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:01,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:37:01,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:37:01,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:37:01,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 219 transitions, 2142 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:37:01,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:01,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:37:01,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:02,988 INFO L124 PetriNetUnfolderBase]: 3027/4843 cut-off events. [2024-06-03 19:37:02,989 INFO L125 PetriNetUnfolderBase]: For 567575/567578 co-relation queries the response was YES. [2024-06-03 19:37:03,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42056 conditions, 4843 events. 3027/4843 cut-off events. For 567575/567578 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 28154 event pairs, 754 based on Foata normal form. 16/4855 useless extension candidates. Maximal degree in co-relation 41962. Up to 3793 conditions per place. [2024-06-03 19:37:03,037 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 179 selfloop transitions, 69 changer transitions 0/261 dead transitions. [2024-06-03 19:37:03,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 261 transitions, 2804 flow [2024-06-03 19:37:03,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:37:03,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:37:03,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-03 19:37:03,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-03 19:37:03,039 INFO L175 Difference]: Start difference. First operand has 195 places, 219 transitions, 2142 flow. Second operand 9 states and 198 transitions. [2024-06-03 19:37:03,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 261 transitions, 2804 flow [2024-06-03 19:37:03,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 261 transitions, 2653 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 19:37:03,483 INFO L231 Difference]: Finished difference. Result has 197 places, 220 transitions, 2175 flow [2024-06-03 19:37:03,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2175, PETRI_PLACES=197, PETRI_TRANSITIONS=220} [2024-06-03 19:37:03,484 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 151 predicate places. [2024-06-03 19:37:03,484 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 220 transitions, 2175 flow [2024-06-03 19:37:03,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:37:03,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:03,484 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 19:37:03,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 19:37:03,484 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:37:03,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:03,485 INFO L85 PathProgramCache]: Analyzing trace with hash 194732333, now seen corresponding path program 9 times [2024-06-03 19:37:03,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:03,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783467171] [2024-06-03 19:37:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:03,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:04,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:04,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783467171] [2024-06-03 19:37:04,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783467171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:04,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:04,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:37:04,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623036494] [2024-06-03 19:37:04,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:04,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:37:04,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:04,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:37:04,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:37:04,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:37:04,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 220 transitions, 2175 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:37:04,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:04,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:37:04,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:05,565 INFO L124 PetriNetUnfolderBase]: 3102/4978 cut-off events. [2024-06-03 19:37:05,565 INFO L125 PetriNetUnfolderBase]: For 592516/592519 co-relation queries the response was YES. [2024-06-03 19:37:05,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42972 conditions, 4978 events. 3102/4978 cut-off events. For 592516/592519 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 29314 event pairs, 793 based on Foata normal form. 20/4994 useless extension candidates. Maximal degree in co-relation 42877. Up to 4148 conditions per place. [2024-06-03 19:37:05,617 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 175 selfloop transitions, 72 changer transitions 0/260 dead transitions. [2024-06-03 19:37:05,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 260 transitions, 2829 flow [2024-06-03 19:37:05,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:37:05,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:37:05,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-03 19:37:05,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-03 19:37:05,619 INFO L175 Difference]: Start difference. First operand has 197 places, 220 transitions, 2175 flow. Second operand 9 states and 198 transitions. [2024-06-03 19:37:05,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 260 transitions, 2829 flow [2024-06-03 19:37:06,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 260 transitions, 2665 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 19:37:06,140 INFO L231 Difference]: Finished difference. Result has 199 places, 221 transitions, 2204 flow [2024-06-03 19:37:06,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2204, PETRI_PLACES=199, PETRI_TRANSITIONS=221} [2024-06-03 19:37:06,141 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 153 predicate places. [2024-06-03 19:37:06,141 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 221 transitions, 2204 flow [2024-06-03 19:37:06,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:37:06,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:06,141 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 19:37:06,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 19:37:06,142 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:37:06,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:06,142 INFO L85 PathProgramCache]: Analyzing trace with hash 194554703, now seen corresponding path program 10 times [2024-06-03 19:37:06,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:06,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982329193] [2024-06-03 19:37:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:06,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:07,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:07,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982329193] [2024-06-03 19:37:07,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982329193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:07,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:07,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:37:07,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896572020] [2024-06-03 19:37:07,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:07,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:37:07,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:07,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:37:07,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:37:07,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:37:07,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 221 transitions, 2204 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:37:07,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:07,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:37:07,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:08,285 INFO L124 PetriNetUnfolderBase]: 3160/5076 cut-off events. [2024-06-03 19:37:08,285 INFO L125 PetriNetUnfolderBase]: For 606480/606483 co-relation queries the response was YES. [2024-06-03 19:37:08,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43648 conditions, 5076 events. 3160/5076 cut-off events. For 606480/606483 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 30107 event pairs, 779 based on Foata normal form. 16/5088 useless extension candidates. Maximal degree in co-relation 43552. Up to 4136 conditions per place. [2024-06-03 19:37:08,340 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 178 selfloop transitions, 74 changer transitions 0/265 dead transitions. [2024-06-03 19:37:08,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 265 transitions, 2884 flow [2024-06-03 19:37:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:37:08,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:37:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-03 19:37:08,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49876543209876545 [2024-06-03 19:37:08,342 INFO L175 Difference]: Start difference. First operand has 199 places, 221 transitions, 2204 flow. Second operand 9 states and 202 transitions. [2024-06-03 19:37:08,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 265 transitions, 2884 flow [2024-06-03 19:37:08,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 265 transitions, 2717 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-03 19:37:08,966 INFO L231 Difference]: Finished difference. Result has 201 places, 222 transitions, 2235 flow [2024-06-03 19:37:08,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2235, PETRI_PLACES=201, PETRI_TRANSITIONS=222} [2024-06-03 19:37:08,966 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 155 predicate places. [2024-06-03 19:37:08,967 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 222 transitions, 2235 flow [2024-06-03 19:37:08,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:37:08,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:08,967 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 19:37:08,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 19:37:08,967 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 19:37:08,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:08,967 INFO L85 PathProgramCache]: Analyzing trace with hash 728661176, now seen corresponding path program 1 times [2024-06-03 19:37:08,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:08,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111393269] [2024-06-03 19:37:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:08,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:09,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:09,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111393269] [2024-06-03 19:37:09,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111393269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:09,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:09,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:37:09,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135233820] [2024-06-03 19:37:09,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:09,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:37:09,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:09,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:37:09,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:37:09,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:37:09,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 222 transitions, 2235 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:09,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:09,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:37:09,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:10,784 INFO L124 PetriNetUnfolderBase]: 3000/4890 cut-off events. [2024-06-03 19:37:10,784 INFO L125 PetriNetUnfolderBase]: For 601548/601551 co-relation queries the response was YES. [2024-06-03 19:37:10,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42927 conditions, 4890 events. 3000/4890 cut-off events. For 601548/601551 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 29628 event pairs, 843 based on Foata normal form. 4/4854 useless extension candidates. Maximal degree in co-relation 42830. Up to 4379 conditions per place. [2024-06-03 19:37:10,829 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 189 selfloop transitions, 24 changer transitions 0/244 dead transitions. [2024-06-03 19:37:10,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 244 transitions, 2764 flow [2024-06-03 19:37:10,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:37:10,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:37:10,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-03 19:37:10,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.473015873015873 [2024-06-03 19:37:10,831 INFO L175 Difference]: Start difference. First operand has 201 places, 222 transitions, 2235 flow. Second operand 7 states and 149 transitions. [2024-06-03 19:37:10,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 244 transitions, 2764 flow [2024-06-03 19:37:11,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 244 transitions, 2586 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-03 19:37:11,327 INFO L231 Difference]: Finished difference. Result has 201 places, 226 transitions, 2175 flow [2024-06-03 19:37:11,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2175, PETRI_PLACES=201, PETRI_TRANSITIONS=226} [2024-06-03 19:37:11,327 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 155 predicate places. [2024-06-03 19:37:11,327 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 226 transitions, 2175 flow [2024-06-03 19:37:11,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:11,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:11,328 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 19:37:11,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 19:37:11,328 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:37:11,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:11,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1346387544, now seen corresponding path program 2 times [2024-06-03 19:37:11,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:11,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999671737] [2024-06-03 19:37:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:11,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:12,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:12,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999671737] [2024-06-03 19:37:12,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999671737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:12,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:12,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:37:12,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634670522] [2024-06-03 19:37:12,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:12,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:37:12,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:12,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:37:12,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:37:12,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:37:12,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 226 transitions, 2175 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:12,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:12,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:37:12,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:13,044 INFO L124 PetriNetUnfolderBase]: 3002/4893 cut-off events. [2024-06-03 19:37:13,044 INFO L125 PetriNetUnfolderBase]: For 612404/612407 co-relation queries the response was YES. [2024-06-03 19:37:13,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42636 conditions, 4893 events. 3002/4893 cut-off events. For 612404/612407 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 29620 event pairs, 857 based on Foata normal form. 4/4857 useless extension candidates. Maximal degree in co-relation 42538. Up to 4350 conditions per place. [2024-06-03 19:37:13,092 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 178 selfloop transitions, 36 changer transitions 0/245 dead transitions. [2024-06-03 19:37:13,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 245 transitions, 2829 flow [2024-06-03 19:37:13,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:37:13,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:37:13,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-03 19:37:13,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46984126984126984 [2024-06-03 19:37:13,093 INFO L175 Difference]: Start difference. First operand has 201 places, 226 transitions, 2175 flow. Second operand 7 states and 148 transitions. [2024-06-03 19:37:13,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 245 transitions, 2829 flow [2024-06-03 19:37:13,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 245 transitions, 2752 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 19:37:13,575 INFO L231 Difference]: Finished difference. Result has 203 places, 229 transitions, 2235 flow [2024-06-03 19:37:13,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2098, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2235, PETRI_PLACES=203, PETRI_TRANSITIONS=229} [2024-06-03 19:37:13,575 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 157 predicate places. [2024-06-03 19:37:13,575 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 229 transitions, 2235 flow [2024-06-03 19:37:13,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:13,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:13,576 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 19:37:13,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 19:37:13,576 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:37:13,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:13,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1357490659, now seen corresponding path program 1 times [2024-06-03 19:37:13,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:13,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688219724] [2024-06-03 19:37:13,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:13,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:14,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:14,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688219724] [2024-06-03 19:37:14,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688219724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:14,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:14,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:37:14,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630607820] [2024-06-03 19:37:14,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:14,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:37:14,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:14,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:37:14,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:37:14,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:37:14,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 229 transitions, 2235 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:14,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:14,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:37:14,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:15,599 INFO L124 PetriNetUnfolderBase]: 3105/5002 cut-off events. [2024-06-03 19:37:15,599 INFO L125 PetriNetUnfolderBase]: For 628089/628092 co-relation queries the response was YES. [2024-06-03 19:37:15,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43408 conditions, 5002 events. 3105/5002 cut-off events. For 628089/628092 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 29902 event pairs, 892 based on Foata normal form. 4/4966 useless extension candidates. Maximal degree in co-relation 43309. Up to 4593 conditions per place. [2024-06-03 19:37:15,659 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 201 selfloop transitions, 30 changer transitions 0/254 dead transitions. [2024-06-03 19:37:15,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 254 transitions, 2827 flow [2024-06-03 19:37:15,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:37:15,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:37:15,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-03 19:37:15,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-03 19:37:15,661 INFO L175 Difference]: Start difference. First operand has 203 places, 229 transitions, 2235 flow. Second operand 8 states and 162 transitions. [2024-06-03 19:37:15,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 254 transitions, 2827 flow [2024-06-03 19:37:16,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 254 transitions, 2740 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-03 19:37:16,274 INFO L231 Difference]: Finished difference. Result has 207 places, 233 transitions, 2297 flow [2024-06-03 19:37:16,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2148, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2297, PETRI_PLACES=207, PETRI_TRANSITIONS=233} [2024-06-03 19:37:16,275 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 161 predicate places. [2024-06-03 19:37:16,275 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 233 transitions, 2297 flow [2024-06-03 19:37:16,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:16,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:16,275 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 19:37:16,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 19:37:16,276 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:37:16,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:16,276 INFO L85 PathProgramCache]: Analyzing trace with hash 736289656, now seen corresponding path program 1 times [2024-06-03 19:37:16,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:16,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637679033] [2024-06-03 19:37:16,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:16,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:17,250 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 19:37:17,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:17,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637679033] [2024-06-03 19:37:17,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637679033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:17,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:17,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:37:17,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471830470] [2024-06-03 19:37:17,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:17,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:37:17,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:17,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:37:17,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:37:17,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:37:17,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 233 transitions, 2297 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:17,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:17,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:37:17,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:18,217 INFO L124 PetriNetUnfolderBase]: 3110/5008 cut-off events. [2024-06-03 19:37:18,217 INFO L125 PetriNetUnfolderBase]: For 643690/643690 co-relation queries the response was YES. [2024-06-03 19:37:18,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44186 conditions, 5008 events. 3110/5008 cut-off events. For 643690/643690 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 29933 event pairs, 887 based on Foata normal form. 1/4970 useless extension candidates. Maximal degree in co-relation 44086. Up to 4668 conditions per place. [2024-06-03 19:37:18,271 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 209 selfloop transitions, 19 changer transitions 0/251 dead transitions. [2024-06-03 19:37:18,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 251 transitions, 2849 flow [2024-06-03 19:37:18,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:37:18,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:37:18,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:37:18,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 19:37:18,273 INFO L175 Difference]: Start difference. First operand has 207 places, 233 transitions, 2297 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:37:18,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 251 transitions, 2849 flow [2024-06-03 19:37:18,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 251 transitions, 2728 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 19:37:18,731 INFO L231 Difference]: Finished difference. Result has 209 places, 236 transitions, 2284 flow [2024-06-03 19:37:18,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2284, PETRI_PLACES=209, PETRI_TRANSITIONS=236} [2024-06-03 19:37:18,731 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 163 predicate places. [2024-06-03 19:37:18,731 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 236 transitions, 2284 flow [2024-06-03 19:37:18,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:18,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:18,732 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 19:37:18,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 19:37:18,732 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:37:18,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:18,732 INFO L85 PathProgramCache]: Analyzing trace with hash 736289191, now seen corresponding path program 2 times [2024-06-03 19:37:18,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:18,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945615732] [2024-06-03 19:37:18,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:18,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:19,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:19,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945615732] [2024-06-03 19:37:19,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945615732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:19,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:19,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:37:19,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688962739] [2024-06-03 19:37:19,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:19,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:37:19,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:19,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:37:19,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:37:19,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:37:19,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 236 transitions, 2284 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:19,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:19,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:37:19,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:20,871 INFO L124 PetriNetUnfolderBase]: 3273/5257 cut-off events. [2024-06-03 19:37:20,871 INFO L125 PetriNetUnfolderBase]: For 666929/666932 co-relation queries the response was YES. [2024-06-03 19:37:20,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46358 conditions, 5257 events. 3273/5257 cut-off events. For 666929/666932 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 31379 event pairs, 897 based on Foata normal form. 4/5215 useless extension candidates. Maximal degree in co-relation 46257. Up to 4702 conditions per place. [2024-06-03 19:37:20,929 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 222 selfloop transitions, 55 changer transitions 0/300 dead transitions. [2024-06-03 19:37:20,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 300 transitions, 3684 flow [2024-06-03 19:37:20,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:37:20,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:37:20,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 19:37:20,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42962962962962964 [2024-06-03 19:37:20,931 INFO L175 Difference]: Start difference. First operand has 209 places, 236 transitions, 2284 flow. Second operand 9 states and 174 transitions. [2024-06-03 19:37:20,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 300 transitions, 3684 flow [2024-06-03 19:37:21,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 300 transitions, 3581 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 19:37:21,519 INFO L231 Difference]: Finished difference. Result has 215 places, 271 transitions, 2800 flow [2024-06-03 19:37:21,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2198, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2800, PETRI_PLACES=215, PETRI_TRANSITIONS=271} [2024-06-03 19:37:21,520 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 169 predicate places. [2024-06-03 19:37:21,520 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 271 transitions, 2800 flow [2024-06-03 19:37:21,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:21,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:21,521 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 19:37:21,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 19:37:21,521 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:37:21,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:21,521 INFO L85 PathProgramCache]: Analyzing trace with hash 736276171, now seen corresponding path program 3 times [2024-06-03 19:37:21,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:21,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747906105] [2024-06-03 19:37:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:21,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:22,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:22,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747906105] [2024-06-03 19:37:22,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747906105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:22,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:22,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:37:22,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624850632] [2024-06-03 19:37:22,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:22,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:37:22,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:22,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:37:22,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:37:22,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:37:22,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 271 transitions, 2800 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:22,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:22,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:37:22,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:23,489 INFO L124 PetriNetUnfolderBase]: 3277/5263 cut-off events. [2024-06-03 19:37:23,490 INFO L125 PetriNetUnfolderBase]: For 688595/688598 co-relation queries the response was YES. [2024-06-03 19:37:23,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47550 conditions, 5263 events. 3277/5263 cut-off events. For 688595/688598 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 31404 event pairs, 897 based on Foata normal form. 4/5221 useless extension candidates. Maximal degree in co-relation 47445. Up to 4709 conditions per place. [2024-06-03 19:37:23,551 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 220 selfloop transitions, 59 changer transitions 0/302 dead transitions. [2024-06-03 19:37:23,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 302 transitions, 3716 flow [2024-06-03 19:37:23,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:37:23,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:37:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 19:37:23,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42962962962962964 [2024-06-03 19:37:23,552 INFO L175 Difference]: Start difference. First operand has 215 places, 271 transitions, 2800 flow. Second operand 9 states and 174 transitions. [2024-06-03 19:37:23,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 302 transitions, 3716 flow [2024-06-03 19:37:24,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 302 transitions, 3594 flow, removed 60 selfloop flow, removed 1 redundant places. [2024-06-03 19:37:24,155 INFO L231 Difference]: Finished difference. Result has 225 places, 279 transitions, 2984 flow [2024-06-03 19:37:24,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2696, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2984, PETRI_PLACES=225, PETRI_TRANSITIONS=279} [2024-06-03 19:37:24,156 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 179 predicate places. [2024-06-03 19:37:24,156 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 279 transitions, 2984 flow [2024-06-03 19:37:24,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:24,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:24,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:24,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 19:37:24,156 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 19:37:24,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:24,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1310755693, now seen corresponding path program 11 times [2024-06-03 19:37:24,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:24,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614833791] [2024-06-03 19:37:24,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:24,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:25,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:25,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614833791] [2024-06-03 19:37:25,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614833791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:25,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:25,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:37:25,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423526740] [2024-06-03 19:37:25,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:25,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:37:25,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:25,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:37:25,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:37:25,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:37:25,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 279 transitions, 2984 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:37:25,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:25,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:37:25,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:26,644 INFO L124 PetriNetUnfolderBase]: 3432/5499 cut-off events. [2024-06-03 19:37:26,645 INFO L125 PetriNetUnfolderBase]: For 744876/744879 co-relation queries the response was YES. [2024-06-03 19:37:26,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49365 conditions, 5499 events. 3432/5499 cut-off events. For 744876/744879 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 32790 event pairs, 802 based on Foata normal form. 22/5507 useless extension candidates. Maximal degree in co-relation 49255. Up to 4562 conditions per place. [2024-06-03 19:37:26,708 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 226 selfloop transitions, 70 changer transitions 0/315 dead transitions. [2024-06-03 19:37:26,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 315 transitions, 3732 flow [2024-06-03 19:37:26,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:37:26,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:37:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-03 19:37:26,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47160493827160493 [2024-06-03 19:37:26,710 INFO L175 Difference]: Start difference. First operand has 225 places, 279 transitions, 2984 flow. Second operand 9 states and 191 transitions. [2024-06-03 19:37:26,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 315 transitions, 3732 flow [2024-06-03 19:37:27,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 315 transitions, 3600 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-03 19:37:27,405 INFO L231 Difference]: Finished difference. Result has 229 places, 280 transitions, 3045 flow [2024-06-03 19:37:27,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2852, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3045, PETRI_PLACES=229, PETRI_TRANSITIONS=280} [2024-06-03 19:37:27,406 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 183 predicate places. [2024-06-03 19:37:27,406 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 280 transitions, 3045 flow [2024-06-03 19:37:27,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:37:27,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:27,406 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 19:37:27,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 19:37:27,407 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 19:37:27,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:27,407 INFO L85 PathProgramCache]: Analyzing trace with hash -780076709, now seen corresponding path program 12 times [2024-06-03 19:37:27,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:27,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748894253] [2024-06-03 19:37:27,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:27,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:28,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:28,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748894253] [2024-06-03 19:37:28,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748894253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:28,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:28,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:37:28,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617148736] [2024-06-03 19:37:28,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:28,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:37:28,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:28,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:37:28,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:37:28,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:37:28,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 280 transitions, 3045 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:37:28,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:28,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:37:28,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:29,885 INFO L124 PetriNetUnfolderBase]: 3507/5623 cut-off events. [2024-06-03 19:37:29,885 INFO L125 PetriNetUnfolderBase]: For 770909/770912 co-relation queries the response was YES. [2024-06-03 19:37:29,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50613 conditions, 5623 events. 3507/5623 cut-off events. For 770909/770912 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 33742 event pairs, 812 based on Foata normal form. 22/5632 useless extension candidates. Maximal degree in co-relation 50502. Up to 4687 conditions per place. [2024-06-03 19:37:29,951 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 226 selfloop transitions, 71 changer transitions 0/316 dead transitions. [2024-06-03 19:37:29,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 316 transitions, 3797 flow [2024-06-03 19:37:29,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:37:29,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:37:29,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-03 19:37:29,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-06-03 19:37:29,952 INFO L175 Difference]: Start difference. First operand has 229 places, 280 transitions, 3045 flow. Second operand 9 states and 190 transitions. [2024-06-03 19:37:29,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 316 transitions, 3797 flow [2024-06-03 19:37:30,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 316 transitions, 3630 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 19:37:30,786 INFO L231 Difference]: Finished difference. Result has 231 places, 281 transitions, 3075 flow [2024-06-03 19:37:30,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2878, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3075, PETRI_PLACES=231, PETRI_TRANSITIONS=281} [2024-06-03 19:37:30,787 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 185 predicate places. [2024-06-03 19:37:30,787 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 281 transitions, 3075 flow [2024-06-03 19:37:30,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:37:30,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:30,787 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 19:37:30,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 19:37:30,787 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 19:37:30,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:30,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1532400733, now seen corresponding path program 13 times [2024-06-03 19:37:30,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:30,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490617514] [2024-06-03 19:37:30,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:30,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:31,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:31,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490617514] [2024-06-03 19:37:31,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490617514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:31,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:31,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:37:31,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192194105] [2024-06-03 19:37:31,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:31,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:37:31,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:31,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:37:31,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:37:31,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:37:31,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 281 transitions, 3075 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:37:31,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:31,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:37:31,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:33,132 INFO L124 PetriNetUnfolderBase]: 3557/5719 cut-off events. [2024-06-03 19:37:33,133 INFO L125 PetriNetUnfolderBase]: For 785194/785197 co-relation queries the response was YES. [2024-06-03 19:37:33,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50963 conditions, 5719 events. 3557/5719 cut-off events. For 785194/785197 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 34535 event pairs, 839 based on Foata normal form. 22/5728 useless extension candidates. Maximal degree in co-relation 50851. Up to 4773 conditions per place. [2024-06-03 19:37:33,198 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 223 selfloop transitions, 74 changer transitions 0/316 dead transitions. [2024-06-03 19:37:33,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 316 transitions, 3825 flow [2024-06-03 19:37:33,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:37:33,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:37:33,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-03 19:37:33,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641975308641975 [2024-06-03 19:37:33,200 INFO L175 Difference]: Start difference. First operand has 231 places, 281 transitions, 3075 flow. Second operand 9 states and 188 transitions. [2024-06-03 19:37:33,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 316 transitions, 3825 flow [2024-06-03 19:37:33,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 316 transitions, 3654 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-03 19:37:33,887 INFO L231 Difference]: Finished difference. Result has 233 places, 282 transitions, 3109 flow [2024-06-03 19:37:33,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2904, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3109, PETRI_PLACES=233, PETRI_TRANSITIONS=282} [2024-06-03 19:37:33,888 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 187 predicate places. [2024-06-03 19:37:33,888 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 282 transitions, 3109 flow [2024-06-03 19:37:33,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:37:33,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:33,888 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 19:37:33,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 19:37:33,889 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 19:37:33,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:33,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1304321953, now seen corresponding path program 14 times [2024-06-03 19:37:33,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:33,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738053956] [2024-06-03 19:37:33,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:33,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:34,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:34,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738053956] [2024-06-03 19:37:34,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738053956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:34,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:34,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:37:34,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559900879] [2024-06-03 19:37:34,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:34,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:37:34,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:34,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:37:34,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:37:34,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:37:34,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 282 transitions, 3109 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:37:34,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:34,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:37:34,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:36,225 INFO L124 PetriNetUnfolderBase]: 3529/5675 cut-off events. [2024-06-03 19:37:36,225 INFO L125 PetriNetUnfolderBase]: For 764015/764018 co-relation queries the response was YES. [2024-06-03 19:37:36,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49744 conditions, 5675 events. 3529/5675 cut-off events. For 764015/764018 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 34228 event pairs, 794 based on Foata normal form. 18/5680 useless extension candidates. Maximal degree in co-relation 49631. Up to 4379 conditions per place. [2024-06-03 19:37:36,293 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 226 selfloop transitions, 75 changer transitions 0/320 dead transitions. [2024-06-03 19:37:36,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 320 transitions, 3833 flow [2024-06-03 19:37:36,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:37:36,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:37:36,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-03 19:37:36,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2024-06-03 19:37:36,295 INFO L175 Difference]: Start difference. First operand has 233 places, 282 transitions, 3109 flow. Second operand 9 states and 192 transitions. [2024-06-03 19:37:36,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 320 transitions, 3833 flow [2024-06-03 19:37:37,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 320 transitions, 3640 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 19:37:37,270 INFO L231 Difference]: Finished difference. Result has 235 places, 282 transitions, 3072 flow [2024-06-03 19:37:37,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2916, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3072, PETRI_PLACES=235, PETRI_TRANSITIONS=282} [2024-06-03 19:37:37,271 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 189 predicate places. [2024-06-03 19:37:37,271 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 282 transitions, 3072 flow [2024-06-03 19:37:37,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 19:37:37,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:37,272 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 19:37:37,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 19:37:37,272 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:37:37,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:37,272 INFO L85 PathProgramCache]: Analyzing trace with hash 740820938, now seen corresponding path program 3 times [2024-06-03 19:37:37,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:37,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145292756] [2024-06-03 19:37:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:37,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:37,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:37,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145292756] [2024-06-03 19:37:37,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145292756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:38,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:38,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:37:38,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667090140] [2024-06-03 19:37:38,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:38,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:37:38,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:38,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:37:38,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:37:38,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:37:38,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 282 transitions, 3072 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:38,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:38,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:37:38,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:39,271 INFO L124 PetriNetUnfolderBase]: 3354/5448 cut-off events. [2024-06-03 19:37:39,272 INFO L125 PetriNetUnfolderBase]: For 745282/745282 co-relation queries the response was YES. [2024-06-03 19:37:39,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48571 conditions, 5448 events. 3354/5448 cut-off events. For 745282/745282 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 33379 event pairs, 896 based on Foata normal form. 1/5389 useless extension candidates. Maximal degree in co-relation 48457. Up to 4844 conditions per place. [2024-06-03 19:37:39,328 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 229 selfloop transitions, 31 changer transitions 0/297 dead transitions. [2024-06-03 19:37:39,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 297 transitions, 3630 flow [2024-06-03 19:37:39,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:37:39,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:37:39,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-03 19:37:39,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634920634920635 [2024-06-03 19:37:39,329 INFO L175 Difference]: Start difference. First operand has 235 places, 282 transitions, 3072 flow. Second operand 7 states and 146 transitions. [2024-06-03 19:37:39,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 297 transitions, 3630 flow [2024-06-03 19:37:39,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 297 transitions, 3399 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-03 19:37:39,937 INFO L231 Difference]: Finished difference. Result has 234 places, 282 transitions, 2909 flow [2024-06-03 19:37:39,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2841, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2909, PETRI_PLACES=234, PETRI_TRANSITIONS=282} [2024-06-03 19:37:39,938 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 188 predicate places. [2024-06-03 19:37:39,938 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 282 transitions, 2909 flow [2024-06-03 19:37:39,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:39,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:39,938 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 19:37:39,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 19:37:39,938 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:37:39,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:39,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1938103480, now seen corresponding path program 4 times [2024-06-03 19:37:39,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:39,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502873593] [2024-06-03 19:37:39,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:39,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:40,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:40,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502873593] [2024-06-03 19:37:40,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502873593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:40,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:40,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:37:40,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740349178] [2024-06-03 19:37:40,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:40,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:37:40,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:40,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:37:40,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:37:40,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:37:40,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 282 transitions, 2909 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:40,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:40,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:37:40,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:41,941 INFO L124 PetriNetUnfolderBase]: 3359/5455 cut-off events. [2024-06-03 19:37:41,941 INFO L125 PetriNetUnfolderBase]: For 759717/759717 co-relation queries the response was YES. [2024-06-03 19:37:41,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48247 conditions, 5455 events. 3359/5455 cut-off events. For 759717/759717 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 33406 event pairs, 894 based on Foata normal form. 1/5396 useless extension candidates. Maximal degree in co-relation 48132. Up to 4833 conditions per place. [2024-06-03 19:37:42,001 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 216 selfloop transitions, 44 changer transitions 0/297 dead transitions. [2024-06-03 19:37:42,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 297 transitions, 3509 flow [2024-06-03 19:37:42,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:37:42,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:37:42,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-03 19:37:42,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-03 19:37:42,002 INFO L175 Difference]: Start difference. First operand has 234 places, 282 transitions, 2909 flow. Second operand 7 states and 145 transitions. [2024-06-03 19:37:42,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 297 transitions, 3509 flow [2024-06-03 19:37:42,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 297 transitions, 3362 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 19:37:42,690 INFO L231 Difference]: Finished difference. Result has 234 places, 285 transitions, 2912 flow [2024-06-03 19:37:42,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2762, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2912, PETRI_PLACES=234, PETRI_TRANSITIONS=285} [2024-06-03 19:37:42,690 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 188 predicate places. [2024-06-03 19:37:42,691 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 285 transitions, 2912 flow [2024-06-03 19:37:42,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:42,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:42,691 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 19:37:42,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 19:37:42,691 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:37:42,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:42,691 INFO L85 PathProgramCache]: Analyzing trace with hash 595868944, now seen corresponding path program 5 times [2024-06-03 19:37:42,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:42,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546313993] [2024-06-03 19:37:42,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:42,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:43,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:43,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546313993] [2024-06-03 19:37:43,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546313993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:43,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:43,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:37:43,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88266625] [2024-06-03 19:37:43,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:43,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:37:43,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:43,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:37:43,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:37:43,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:37:43,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 285 transitions, 2912 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:43,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:43,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:37:43,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:44,538 INFO L124 PetriNetUnfolderBase]: 3364/5470 cut-off events. [2024-06-03 19:37:44,538 INFO L125 PetriNetUnfolderBase]: For 778774/778777 co-relation queries the response was YES. [2024-06-03 19:37:44,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48561 conditions, 5470 events. 3364/5470 cut-off events. For 778774/778777 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 33613 event pairs, 918 based on Foata normal form. 3/5412 useless extension candidates. Maximal degree in co-relation 48445. Up to 4757 conditions per place. [2024-06-03 19:37:44,612 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 180 selfloop transitions, 81 changer transitions 0/298 dead transitions. [2024-06-03 19:37:44,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 298 transitions, 3666 flow [2024-06-03 19:37:44,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:37:44,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:37:44,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:37:44,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-03 19:37:44,613 INFO L175 Difference]: Start difference. First operand has 234 places, 285 transitions, 2912 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:37:44,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 298 transitions, 3666 flow [2024-06-03 19:37:45,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 298 transitions, 3548 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 19:37:45,286 INFO L231 Difference]: Finished difference. Result has 237 places, 288 transitions, 3018 flow [2024-06-03 19:37:45,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2794, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3018, PETRI_PLACES=237, PETRI_TRANSITIONS=288} [2024-06-03 19:37:45,287 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 191 predicate places. [2024-06-03 19:37:45,287 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 288 transitions, 3018 flow [2024-06-03 19:37:45,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:45,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:45,287 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 19:37:45,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 19:37:45,288 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:37:45,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:45,288 INFO L85 PathProgramCache]: Analyzing trace with hash 663891128, now seen corresponding path program 6 times [2024-06-03 19:37:45,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:45,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113797578] [2024-06-03 19:37:45,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:45,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:46,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:46,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113797578] [2024-06-03 19:37:46,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113797578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:46,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:46,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:37:46,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322125923] [2024-06-03 19:37:46,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:46,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:37:46,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:46,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:37:46,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:37:46,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:37:46,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 288 transitions, 3018 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:46,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:46,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:37:46,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:47,076 INFO L124 PetriNetUnfolderBase]: 3356/5460 cut-off events. [2024-06-03 19:37:47,076 INFO L125 PetriNetUnfolderBase]: For 794908/794911 co-relation queries the response was YES. [2024-06-03 19:37:47,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48640 conditions, 5460 events. 3356/5460 cut-off events. For 794908/794911 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 33514 event pairs, 919 based on Foata normal form. 4/5403 useless extension candidates. Maximal degree in co-relation 48523. Up to 4749 conditions per place. [2024-06-03 19:37:47,140 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 188 selfloop transitions, 72 changer transitions 0/297 dead transitions. [2024-06-03 19:37:47,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 297 transitions, 3560 flow [2024-06-03 19:37:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:37:47,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:37:47,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-03 19:37:47,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-03 19:37:47,141 INFO L175 Difference]: Start difference. First operand has 237 places, 288 transitions, 3018 flow. Second operand 7 states and 144 transitions. [2024-06-03 19:37:47,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 297 transitions, 3560 flow [2024-06-03 19:37:47,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 297 transitions, 3342 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-03 19:37:47,825 INFO L231 Difference]: Finished difference. Result has 239 places, 288 transitions, 2952 flow [2024-06-03 19:37:47,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2800, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2952, PETRI_PLACES=239, PETRI_TRANSITIONS=288} [2024-06-03 19:37:47,835 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 193 predicate places. [2024-06-03 19:37:47,835 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 288 transitions, 2952 flow [2024-06-03 19:37:47,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:47,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:47,835 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 19:37:47,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 19:37:47,835 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 19:37:47,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:47,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1341328903, now seen corresponding path program 1 times [2024-06-03 19:37:47,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:47,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386869748] [2024-06-03 19:37:47,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:47,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:49,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:49,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386869748] [2024-06-03 19:37:49,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386869748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:49,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:49,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:37:49,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800422838] [2024-06-03 19:37:49,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:49,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:37:49,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:49,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:37:49,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:37:49,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:37:49,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 288 transitions, 2952 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:49,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:49,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:37:49,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:50,692 INFO L124 PetriNetUnfolderBase]: 3541/5665 cut-off events. [2024-06-03 19:37:50,693 INFO L125 PetriNetUnfolderBase]: For 818621/818621 co-relation queries the response was YES. [2024-06-03 19:37:50,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49934 conditions, 5665 events. 3541/5665 cut-off events. For 818621/818621 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 34015 event pairs, 843 based on Foata normal form. 4/5644 useless extension candidates. Maximal degree in co-relation 49816. Up to 4852 conditions per place. [2024-06-03 19:37:50,760 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 228 selfloop transitions, 80 changer transitions 0/327 dead transitions. [2024-06-03 19:37:50,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 327 transitions, 3738 flow [2024-06-03 19:37:50,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:37:50,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:37:50,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-03 19:37:50,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-03 19:37:50,762 INFO L175 Difference]: Start difference. First operand has 239 places, 288 transitions, 2952 flow. Second operand 10 states and 207 transitions. [2024-06-03 19:37:50,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 327 transitions, 3738 flow [2024-06-03 19:37:51,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 327 transitions, 3562 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 19:37:51,521 INFO L231 Difference]: Finished difference. Result has 243 places, 293 transitions, 3033 flow [2024-06-03 19:37:51,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2776, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3033, PETRI_PLACES=243, PETRI_TRANSITIONS=293} [2024-06-03 19:37:51,521 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 197 predicate places. [2024-06-03 19:37:51,521 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 293 transitions, 3033 flow [2024-06-03 19:37:51,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:51,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:51,522 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 19:37:51,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 19:37:51,522 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:37:51,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:51,523 INFO L85 PathProgramCache]: Analyzing trace with hash -646541433, now seen corresponding path program 2 times [2024-06-03 19:37:51,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:51,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037973823] [2024-06-03 19:37:51,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:51,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:53,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:53,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037973823] [2024-06-03 19:37:53,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037973823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:53,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:53,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:37:53,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087993140] [2024-06-03 19:37:53,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:53,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:37:53,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:53,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:37:53,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:37:53,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:37:53,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 293 transitions, 3033 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:53,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:53,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:37:53,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:54,707 INFO L124 PetriNetUnfolderBase]: 3558/5694 cut-off events. [2024-06-03 19:37:54,708 INFO L125 PetriNetUnfolderBase]: For 843028/843028 co-relation queries the response was YES. [2024-06-03 19:37:54,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51128 conditions, 5694 events. 3558/5694 cut-off events. For 843028/843028 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 34179 event pairs, 843 based on Foata normal form. 4/5673 useless extension candidates. Maximal degree in co-relation 51008. Up to 4879 conditions per place. [2024-06-03 19:37:54,769 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 229 selfloop transitions, 84 changer transitions 0/332 dead transitions. [2024-06-03 19:37:54,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 332 transitions, 3845 flow [2024-06-03 19:37:54,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:37:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:37:54,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-03 19:37:54,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-03 19:37:54,770 INFO L175 Difference]: Start difference. First operand has 243 places, 293 transitions, 3033 flow. Second operand 10 states and 207 transitions. [2024-06-03 19:37:54,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 332 transitions, 3845 flow [2024-06-03 19:37:55,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 332 transitions, 3628 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-03 19:37:55,638 INFO L231 Difference]: Finished difference. Result has 247 places, 298 transitions, 3091 flow [2024-06-03 19:37:55,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2820, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3091, PETRI_PLACES=247, PETRI_TRANSITIONS=298} [2024-06-03 19:37:55,639 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 201 predicate places. [2024-06-03 19:37:55,639 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 298 transitions, 3091 flow [2024-06-03 19:37:55,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:55,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:55,639 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 19:37:55,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 19:37:55,640 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:37:55,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:55,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2020265321, now seen corresponding path program 3 times [2024-06-03 19:37:55,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:55,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026849644] [2024-06-03 19:37:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:55,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:56,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:56,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026849644] [2024-06-03 19:37:56,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026849644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:56,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:56,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:37:56,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196828741] [2024-06-03 19:37:56,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:56,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:37:56,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:56,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:37:56,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:37:57,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:37:57,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 298 transitions, 3091 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:57,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:57,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:37:57,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:58,655 INFO L124 PetriNetUnfolderBase]: 3586/5746 cut-off events. [2024-06-03 19:37:58,655 INFO L125 PetriNetUnfolderBase]: For 866646/866646 co-relation queries the response was YES. [2024-06-03 19:37:58,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52108 conditions, 5746 events. 3586/5746 cut-off events. For 866646/866646 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 34634 event pairs, 843 based on Foata normal form. 4/5728 useless extension candidates. Maximal degree in co-relation 51986. Up to 4913 conditions per place. [2024-06-03 19:37:58,731 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 226 selfloop transitions, 96 changer transitions 0/341 dead transitions. [2024-06-03 19:37:58,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 341 transitions, 3975 flow [2024-06-03 19:37:58,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:37:58,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:37:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-03 19:37:58,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-03 19:37:58,733 INFO L175 Difference]: Start difference. First operand has 247 places, 298 transitions, 3091 flow. Second operand 10 states and 207 transitions. [2024-06-03 19:37:58,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 341 transitions, 3975 flow [2024-06-03 19:37:59,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 341 transitions, 3732 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-03 19:37:59,671 INFO L231 Difference]: Finished difference. Result has 251 places, 309 transitions, 3225 flow [2024-06-03 19:37:59,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2864, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3225, PETRI_PLACES=251, PETRI_TRANSITIONS=309} [2024-06-03 19:37:59,672 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 205 predicate places. [2024-06-03 19:37:59,672 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 309 transitions, 3225 flow [2024-06-03 19:37:59,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:59,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:59,672 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 19:37:59,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 19:37:59,673 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:37:59,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:59,673 INFO L85 PathProgramCache]: Analyzing trace with hash -989384825, now seen corresponding path program 4 times [2024-06-03 19:37:59,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:59,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925651908] [2024-06-03 19:37:59,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:59,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:01,069 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 19:38:01,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:01,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925651908] [2024-06-03 19:38:01,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925651908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:01,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:01,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:38:01,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75769714] [2024-06-03 19:38:01,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:01,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:38:01,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:01,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:38:01,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:38:01,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:38:01,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 309 transitions, 3225 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:01,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:01,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:38:01,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:02,623 INFO L124 PetriNetUnfolderBase]: 3619/5815 cut-off events. [2024-06-03 19:38:02,623 INFO L125 PetriNetUnfolderBase]: For 879950/879950 co-relation queries the response was YES. [2024-06-03 19:38:02,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52622 conditions, 5815 events. 3619/5815 cut-off events. For 879950/879950 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 35264 event pairs, 668 based on Foata normal form. 4/5797 useless extension candidates. Maximal degree in co-relation 52498. Up to 4761 conditions per place. [2024-06-03 19:38:02,692 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 226 selfloop transitions, 107 changer transitions 0/352 dead transitions. [2024-06-03 19:38:02,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 352 transitions, 4423 flow [2024-06-03 19:38:02,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:38:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:38:02,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-03 19:38:02,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2024-06-03 19:38:02,693 INFO L175 Difference]: Start difference. First operand has 251 places, 309 transitions, 3225 flow. Second operand 10 states and 213 transitions. [2024-06-03 19:38:02,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 352 transitions, 4423 flow [2024-06-03 19:38:03,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 352 transitions, 4200 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-03 19:38:03,624 INFO L231 Difference]: Finished difference. Result has 257 places, 314 transitions, 3404 flow [2024-06-03 19:38:03,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3008, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3404, PETRI_PLACES=257, PETRI_TRANSITIONS=314} [2024-06-03 19:38:03,625 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 211 predicate places. [2024-06-03 19:38:03,625 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 314 transitions, 3404 flow [2024-06-03 19:38:03,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:03,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:03,625 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 19:38:03,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 19:38:03,625 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 19:38:03,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:03,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1284960215, now seen corresponding path program 5 times [2024-06-03 19:38:03,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:03,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333915745] [2024-06-03 19:38:03,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:03,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:04,932 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 19:38:04,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:04,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333915745] [2024-06-03 19:38:04,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333915745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:04,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:04,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:38:04,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790657690] [2024-06-03 19:38:04,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:04,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:38:04,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:04,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:38:04,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:38:05,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:38:05,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 314 transitions, 3404 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:05,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:05,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:38:05,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:06,618 INFO L124 PetriNetUnfolderBase]: 3611/5802 cut-off events. [2024-06-03 19:38:06,618 INFO L125 PetriNetUnfolderBase]: For 889553/889553 co-relation queries the response was YES. [2024-06-03 19:38:06,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51941 conditions, 5802 events. 3611/5802 cut-off events. For 889553/889553 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 35191 event pairs, 850 based on Foata normal form. 4/5783 useless extension candidates. Maximal degree in co-relation 51815. Up to 4960 conditions per place. [2024-06-03 19:38:06,691 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 234 selfloop transitions, 94 changer transitions 0/347 dead transitions. [2024-06-03 19:38:06,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 347 transitions, 4155 flow [2024-06-03 19:38:06,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:38:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:38:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-03 19:38:06,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-03 19:38:06,692 INFO L175 Difference]: Start difference. First operand has 257 places, 314 transitions, 3404 flow. Second operand 10 states and 207 transitions. [2024-06-03 19:38:06,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 347 transitions, 4155 flow [2024-06-03 19:38:07,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 347 transitions, 3867 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-03 19:38:07,472 INFO L231 Difference]: Finished difference. Result has 261 places, 315 transitions, 3334 flow [2024-06-03 19:38:07,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3334, PETRI_PLACES=261, PETRI_TRANSITIONS=315} [2024-06-03 19:38:07,472 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 215 predicate places. [2024-06-03 19:38:07,472 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 315 transitions, 3334 flow [2024-06-03 19:38:07,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:07,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:07,473 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 19:38:07,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 19:38:07,473 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:07,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:07,473 INFO L85 PathProgramCache]: Analyzing trace with hash 664333033, now seen corresponding path program 4 times [2024-06-03 19:38:07,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:07,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888562624] [2024-06-03 19:38:07,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:07,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:08,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:08,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:08,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888562624] [2024-06-03 19:38:08,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888562624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:08,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:08,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:08,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018454413] [2024-06-03 19:38:08,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:08,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:08,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:08,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:08,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:08,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:38:08,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 315 transitions, 3334 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:08,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:08,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:38:08,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:09,693 INFO L124 PetriNetUnfolderBase]: 3551/5749 cut-off events. [2024-06-03 19:38:09,693 INFO L125 PetriNetUnfolderBase]: For 907185/907188 co-relation queries the response was YES. [2024-06-03 19:38:09,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51755 conditions, 5749 events. 3551/5749 cut-off events. For 907185/907188 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 35380 event pairs, 845 based on Foata normal form. 4/5692 useless extension candidates. Maximal degree in co-relation 51627. Up to 5009 conditions per place. [2024-06-03 19:38:09,763 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 209 selfloop transitions, 108 changer transitions 0/340 dead transitions. [2024-06-03 19:38:09,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 340 transitions, 4640 flow [2024-06-03 19:38:09,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:09,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:38:09,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-03 19:38:09,764 INFO L175 Difference]: Start difference. First operand has 261 places, 315 transitions, 3334 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:38:09,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 340 transitions, 4640 flow [2024-06-03 19:38:10,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 340 transitions, 4425 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-03 19:38:10,754 INFO L231 Difference]: Finished difference. Result has 263 places, 326 transitions, 3604 flow [2024-06-03 19:38:10,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3119, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3604, PETRI_PLACES=263, PETRI_TRANSITIONS=326} [2024-06-03 19:38:10,754 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 217 predicate places. [2024-06-03 19:38:10,754 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 326 transitions, 3604 flow [2024-06-03 19:38:10,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:10,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:10,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:10,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 19:38:10,755 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:10,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:10,755 INFO L85 PathProgramCache]: Analyzing trace with hash -416583570, now seen corresponding path program 2 times [2024-06-03 19:38:10,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:10,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074678759] [2024-06-03 19:38:10,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:10,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:11,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:11,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074678759] [2024-06-03 19:38:11,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074678759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:11,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:11,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:11,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742983155] [2024-06-03 19:38:11,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:11,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:11,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:11,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:11,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:11,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:38:11,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 326 transitions, 3604 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:11,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:11,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:38:11,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:12,968 INFO L124 PetriNetUnfolderBase]: 3564/5768 cut-off events. [2024-06-03 19:38:12,969 INFO L125 PetriNetUnfolderBase]: For 934575/934581 co-relation queries the response was YES. [2024-06-03 19:38:13,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52804 conditions, 5768 events. 3564/5768 cut-off events. For 934575/934581 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 35445 event pairs, 809 based on Foata normal form. 5/5719 useless extension candidates. Maximal degree in co-relation 52674. Up to 5323 conditions per place. [2024-06-03 19:38:13,044 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 283 selfloop transitions, 43 changer transitions 0/349 dead transitions. [2024-06-03 19:38:13,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 349 transitions, 4868 flow [2024-06-03 19:38:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:13,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:38:13,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-03 19:38:13,045 INFO L175 Difference]: Start difference. First operand has 263 places, 326 transitions, 3604 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:38:13,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 349 transitions, 4868 flow [2024-06-03 19:38:13,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 349 transitions, 4654 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-03 19:38:14,000 INFO L231 Difference]: Finished difference. Result has 269 places, 337 transitions, 3759 flow [2024-06-03 19:38:14,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3390, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3759, PETRI_PLACES=269, PETRI_TRANSITIONS=337} [2024-06-03 19:38:14,001 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 223 predicate places. [2024-06-03 19:38:14,001 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 337 transitions, 3759 flow [2024-06-03 19:38:14,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:14,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:14,001 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 19:38:14,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 19:38:14,001 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:14,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:14,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1109422396, now seen corresponding path program 3 times [2024-06-03 19:38:14,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:14,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605173303] [2024-06-03 19:38:14,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:14,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:14,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:14,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:14,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605173303] [2024-06-03 19:38:14,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605173303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:14,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:14,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:14,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785638324] [2024-06-03 19:38:14,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:14,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:14,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:14,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:14,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:15,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:38:15,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 337 transitions, 3759 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:15,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:15,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:38:15,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:16,286 INFO L124 PetriNetUnfolderBase]: 3561/5774 cut-off events. [2024-06-03 19:38:16,287 INFO L125 PetriNetUnfolderBase]: For 951534/951540 co-relation queries the response was YES. [2024-06-03 19:38:16,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52728 conditions, 5774 events. 3561/5774 cut-off events. For 951534/951540 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 35622 event pairs, 809 based on Foata normal form. 5/5725 useless extension candidates. Maximal degree in co-relation 52595. Up to 5320 conditions per place. [2024-06-03 19:38:16,360 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 277 selfloop transitions, 48 changer transitions 0/348 dead transitions. [2024-06-03 19:38:16,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 348 transitions, 4605 flow [2024-06-03 19:38:16,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:38:16,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:38:16,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 19:38:16,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-03 19:38:16,361 INFO L175 Difference]: Start difference. First operand has 269 places, 337 transitions, 3759 flow. Second operand 9 states and 162 transitions. [2024-06-03 19:38:16,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 348 transitions, 4605 flow [2024-06-03 19:38:17,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 348 transitions, 4432 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-03 19:38:17,575 INFO L231 Difference]: Finished difference. Result has 275 places, 337 transitions, 3688 flow [2024-06-03 19:38:17,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3586, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3688, PETRI_PLACES=275, PETRI_TRANSITIONS=337} [2024-06-03 19:38:17,576 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 229 predicate places. [2024-06-03 19:38:17,576 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 337 transitions, 3688 flow [2024-06-03 19:38:17,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:17,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:17,576 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 19:38:17,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 19:38:17,577 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:17,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:17,577 INFO L85 PathProgramCache]: Analyzing trace with hash 663887563, now seen corresponding path program 5 times [2024-06-03 19:38:17,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:17,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865320672] [2024-06-03 19:38:17,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:17,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:18,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:18,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865320672] [2024-06-03 19:38:18,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865320672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:18,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:18,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:18,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45452325] [2024-06-03 19:38:18,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:18,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:18,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:18,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:18,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:18,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:38:18,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 337 transitions, 3688 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:18,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:18,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:38:18,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:19,891 INFO L124 PetriNetUnfolderBase]: 3603/5835 cut-off events. [2024-06-03 19:38:19,891 INFO L125 PetriNetUnfolderBase]: For 990654/990657 co-relation queries the response was YES. [2024-06-03 19:38:19,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53841 conditions, 5835 events. 3603/5835 cut-off events. For 990654/990657 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 35974 event pairs, 845 based on Foata normal form. 4/5778 useless extension candidates. Maximal degree in co-relation 53706. Up to 5063 conditions per place. [2024-06-03 19:38:19,965 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 230 selfloop transitions, 111 changer transitions 0/364 dead transitions. [2024-06-03 19:38:19,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 364 transitions, 5262 flow [2024-06-03 19:38:19,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:19,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-03 19:38:19,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:38:19,967 INFO L175 Difference]: Start difference. First operand has 275 places, 337 transitions, 3688 flow. Second operand 8 states and 160 transitions. [2024-06-03 19:38:19,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 364 transitions, 5262 flow [2024-06-03 19:38:20,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 364 transitions, 5166 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 19:38:20,967 INFO L231 Difference]: Finished difference. Result has 278 places, 349 transitions, 4144 flow [2024-06-03 19:38:20,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3592, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4144, PETRI_PLACES=278, PETRI_TRANSITIONS=349} [2024-06-03 19:38:20,968 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 232 predicate places. [2024-06-03 19:38:20,968 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 349 transitions, 4144 flow [2024-06-03 19:38:20,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:20,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:20,968 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 19:38:20,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 19:38:20,969 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:20,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:20,969 INFO L85 PathProgramCache]: Analyzing trace with hash -417016485, now seen corresponding path program 6 times [2024-06-03 19:38:20,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:20,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591596461] [2024-06-03 19:38:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:20,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:21,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:21,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591596461] [2024-06-03 19:38:21,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591596461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:21,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:21,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:21,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418238366] [2024-06-03 19:38:21,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:21,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:21,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:21,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:21,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:22,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:38:22,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 349 transitions, 4144 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:22,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:22,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:38:22,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:23,377 INFO L124 PetriNetUnfolderBase]: 3599/5823 cut-off events. [2024-06-03 19:38:23,377 INFO L125 PetriNetUnfolderBase]: For 1008817/1008820 co-relation queries the response was YES. [2024-06-03 19:38:23,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54541 conditions, 5823 events. 3599/5823 cut-off events. For 1008817/1008820 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 35864 event pairs, 845 based on Foata normal form. 4/5766 useless extension candidates. Maximal degree in co-relation 54403. Up to 5061 conditions per place. [2024-06-03 19:38:23,445 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 235 selfloop transitions, 106 changer transitions 0/364 dead transitions. [2024-06-03 19:38:23,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 364 transitions, 5464 flow [2024-06-03 19:38:23,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:23,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:23,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-03 19:38:23,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:38:23,446 INFO L175 Difference]: Start difference. First operand has 278 places, 349 transitions, 4144 flow. Second operand 8 states and 160 transitions. [2024-06-03 19:38:23,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 364 transitions, 5464 flow [2024-06-03 19:38:24,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 364 transitions, 5188 flow, removed 86 selfloop flow, removed 3 redundant places. [2024-06-03 19:38:24,551 INFO L231 Difference]: Finished difference. Result has 283 places, 349 transitions, 4092 flow [2024-06-03 19:38:24,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3872, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4092, PETRI_PLACES=283, PETRI_TRANSITIONS=349} [2024-06-03 19:38:24,551 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 237 predicate places. [2024-06-03 19:38:24,552 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 349 transitions, 4092 flow [2024-06-03 19:38:24,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:24,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:24,552 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 19:38:24,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 19:38:24,552 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:24,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:24,552 INFO L85 PathProgramCache]: Analyzing trace with hash 590164944, now seen corresponding path program 4 times [2024-06-03 19:38:24,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:24,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126367522] [2024-06-03 19:38:24,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:24,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:25,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:25,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126367522] [2024-06-03 19:38:25,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126367522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:25,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:25,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:25,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847189885] [2024-06-03 19:38:25,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:25,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:25,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:25,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:25,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:25,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:38:25,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 349 transitions, 4092 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:25,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:25,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:38:25,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:26,792 INFO L124 PetriNetUnfolderBase]: 3596/5820 cut-off events. [2024-06-03 19:38:26,793 INFO L125 PetriNetUnfolderBase]: For 1019940/1019946 co-relation queries the response was YES. [2024-06-03 19:38:26,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54226 conditions, 5820 events. 3596/5820 cut-off events. For 1019940/1019946 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 35801 event pairs, 809 based on Foata normal form. 5/5771 useless extension candidates. Maximal degree in co-relation 54087. Up to 5370 conditions per place. [2024-06-03 19:38:26,992 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 295 selfloop transitions, 42 changer transitions 0/360 dead transitions. [2024-06-03 19:38:26,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 360 transitions, 4798 flow [2024-06-03 19:38:26,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:26,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:26,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:38:26,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 19:38:26,994 INFO L175 Difference]: Start difference. First operand has 283 places, 349 transitions, 4092 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:38:26,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 360 transitions, 4798 flow [2024-06-03 19:38:27,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 360 transitions, 4500 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-03 19:38:27,911 INFO L231 Difference]: Finished difference. Result has 283 places, 350 transitions, 3892 flow [2024-06-03 19:38:27,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3794, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3892, PETRI_PLACES=283, PETRI_TRANSITIONS=350} [2024-06-03 19:38:27,911 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 237 predicate places. [2024-06-03 19:38:27,911 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 350 transitions, 3892 flow [2024-06-03 19:38:27,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:27,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:27,912 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 19:38:27,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 19:38:27,912 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:27,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:27,913 INFO L85 PathProgramCache]: Analyzing trace with hash -742862263, now seen corresponding path program 7 times [2024-06-03 19:38:27,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:27,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546827658] [2024-06-03 19:38:27,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:27,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:28,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:28,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546827658] [2024-06-03 19:38:28,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546827658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:28,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:28,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:28,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928862868] [2024-06-03 19:38:28,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:28,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:28,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:28,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:28,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:28,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:38:28,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 350 transitions, 3892 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:28,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:28,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:38:28,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:30,214 INFO L124 PetriNetUnfolderBase]: 3753/6067 cut-off events. [2024-06-03 19:38:30,215 INFO L125 PetriNetUnfolderBase]: For 1053633/1053636 co-relation queries the response was YES. [2024-06-03 19:38:30,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56024 conditions, 6067 events. 3753/6067 cut-off events. For 1053633/1053636 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 37579 event pairs, 819 based on Foata normal form. 4/6019 useless extension candidates. Maximal degree in co-relation 55886. Up to 5351 conditions per place. [2024-06-03 19:38:30,297 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 315 selfloop transitions, 94 changer transitions 0/432 dead transitions. [2024-06-03 19:38:30,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 432 transitions, 5824 flow [2024-06-03 19:38:30,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:38:30,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:38:30,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-03 19:38:30,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:38:30,298 INFO L175 Difference]: Start difference. First operand has 283 places, 350 transitions, 3892 flow. Second operand 9 states and 180 transitions. [2024-06-03 19:38:30,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 432 transitions, 5824 flow [2024-06-03 19:38:31,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 432 transitions, 5746 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 19:38:31,536 INFO L231 Difference]: Finished difference. Result has 290 places, 396 transitions, 4879 flow [2024-06-03 19:38:31,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3823, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4879, PETRI_PLACES=290, PETRI_TRANSITIONS=396} [2024-06-03 19:38:31,537 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 244 predicate places. [2024-06-03 19:38:31,537 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 396 transitions, 4879 flow [2024-06-03 19:38:31,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:31,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:31,537 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 19:38:31,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 19:38:31,537 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:31,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:31,538 INFO L85 PathProgramCache]: Analyzing trace with hash -2076791477, now seen corresponding path program 8 times [2024-06-03 19:38:31,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:31,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531157521] [2024-06-03 19:38:31,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:31,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:32,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:32,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531157521] [2024-06-03 19:38:32,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531157521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:32,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:32,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:32,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903503733] [2024-06-03 19:38:32,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:32,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:32,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:32,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:32,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:32,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:38:32,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 396 transitions, 4879 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:32,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:32,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:38:32,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:33,883 INFO L124 PetriNetUnfolderBase]: 3755/6070 cut-off events. [2024-06-03 19:38:33,883 INFO L125 PetriNetUnfolderBase]: For 1077567/1077570 co-relation queries the response was YES. [2024-06-03 19:38:33,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57214 conditions, 6070 events. 3755/6070 cut-off events. For 1077567/1077570 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 37576 event pairs, 819 based on Foata normal form. 4/6022 useless extension candidates. Maximal degree in co-relation 57072. Up to 5355 conditions per place. [2024-06-03 19:38:33,963 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 313 selfloop transitions, 99 changer transitions 0/435 dead transitions. [2024-06-03 19:38:33,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 435 transitions, 6175 flow [2024-06-03 19:38:33,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:38:33,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:38:33,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-03 19:38:33,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4469135802469136 [2024-06-03 19:38:33,965 INFO L175 Difference]: Start difference. First operand has 290 places, 396 transitions, 4879 flow. Second operand 9 states and 181 transitions. [2024-06-03 19:38:33,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 435 transitions, 6175 flow [2024-06-03 19:38:35,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 435 transitions, 5830 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-03 19:38:35,259 INFO L231 Difference]: Finished difference. Result has 295 places, 406 transitions, 5008 flow [2024-06-03 19:38:35,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4547, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5008, PETRI_PLACES=295, PETRI_TRANSITIONS=406} [2024-06-03 19:38:35,259 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 249 predicate places. [2024-06-03 19:38:35,260 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 406 transitions, 5008 flow [2024-06-03 19:38:35,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:35,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:35,260 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 19:38:35,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 19:38:35,260 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:35,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:35,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1816103886, now seen corresponding path program 1 times [2024-06-03 19:38:35,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:35,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723838072] [2024-06-03 19:38:35,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:35,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:36,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:36,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723838072] [2024-06-03 19:38:36,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723838072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:36,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:36,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:36,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366326109] [2024-06-03 19:38:36,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:36,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:36,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:36,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:36,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:36,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:38:36,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 406 transitions, 5008 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:38:36,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:36,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:38:36,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:37,932 INFO L124 PetriNetUnfolderBase]: 3727/6088 cut-off events. [2024-06-03 19:38:37,933 INFO L125 PetriNetUnfolderBase]: For 1107194/1107194 co-relation queries the response was YES. [2024-06-03 19:38:37,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57450 conditions, 6088 events. 3727/6088 cut-off events. For 1107194/1107194 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 37948 event pairs, 842 based on Foata normal form. 2/6087 useless extension candidates. Maximal degree in co-relation 57306. Up to 5467 conditions per place. [2024-06-03 19:38:38,015 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 373 selfloop transitions, 18 changer transitions 0/429 dead transitions. [2024-06-03 19:38:38,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 429 transitions, 5908 flow [2024-06-03 19:38:38,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:38,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-03 19:38:38,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-03 19:38:38,017 INFO L175 Difference]: Start difference. First operand has 295 places, 406 transitions, 5008 flow. Second operand 8 states and 161 transitions. [2024-06-03 19:38:38,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 429 transitions, 5908 flow [2024-06-03 19:38:39,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 429 transitions, 5728 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-03 19:38:39,416 INFO L231 Difference]: Finished difference. Result has 298 places, 409 transitions, 4934 flow [2024-06-03 19:38:39,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4828, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4934, PETRI_PLACES=298, PETRI_TRANSITIONS=409} [2024-06-03 19:38:39,417 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 252 predicate places. [2024-06-03 19:38:39,417 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 409 transitions, 4934 flow [2024-06-03 19:38:39,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:38:39,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:39,417 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 19:38:39,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 19:38:39,417 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:39,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:39,418 INFO L85 PathProgramCache]: Analyzing trace with hash 339174560, now seen corresponding path program 2 times [2024-06-03 19:38:39,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:39,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805830998] [2024-06-03 19:38:39,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:39,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:40,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:40,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805830998] [2024-06-03 19:38:40,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805830998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:40,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:40,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:40,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551427209] [2024-06-03 19:38:40,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:40,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:40,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:40,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:40,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:40,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:38:40,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 409 transitions, 4934 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:38:40,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:40,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:38:40,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:41,666 INFO L124 PetriNetUnfolderBase]: 3737/6104 cut-off events. [2024-06-03 19:38:41,666 INFO L125 PetriNetUnfolderBase]: For 1129263/1129263 co-relation queries the response was YES. [2024-06-03 19:38:41,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57982 conditions, 6104 events. 3737/6104 cut-off events. For 1129263/1129263 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 38065 event pairs, 842 based on Foata normal form. 2/6103 useless extension candidates. Maximal degree in co-relation 57837. Up to 5472 conditions per place. [2024-06-03 19:38:41,751 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 369 selfloop transitions, 23 changer transitions 0/430 dead transitions. [2024-06-03 19:38:41,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 430 transitions, 5836 flow [2024-06-03 19:38:41,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:41,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:41,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-03 19:38:41,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-03 19:38:41,753 INFO L175 Difference]: Start difference. First operand has 298 places, 409 transitions, 4934 flow. Second operand 8 states and 161 transitions. [2024-06-03 19:38:41,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 430 transitions, 5836 flow [2024-06-03 19:38:43,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 430 transitions, 5752 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 19:38:43,188 INFO L231 Difference]: Finished difference. Result has 300 places, 412 transitions, 4972 flow [2024-06-03 19:38:43,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4850, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4972, PETRI_PLACES=300, PETRI_TRANSITIONS=412} [2024-06-03 19:38:43,188 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 254 predicate places. [2024-06-03 19:38:43,188 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 412 transitions, 4972 flow [2024-06-03 19:38:43,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:38:43,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:43,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:43,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 19:38:43,189 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:43,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:43,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1932547443, now seen corresponding path program 1 times [2024-06-03 19:38:43,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:43,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358470215] [2024-06-03 19:38:43,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:43,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:43,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:43,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358470215] [2024-06-03 19:38:43,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358470215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:43,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:43,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:43,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798591800] [2024-06-03 19:38:43,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:43,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:43,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:43,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:43,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:44,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:38:44,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 412 transitions, 4972 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:44,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:44,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:38:44,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:45,401 INFO L124 PetriNetUnfolderBase]: 3833/6202 cut-off events. [2024-06-03 19:38:45,401 INFO L125 PetriNetUnfolderBase]: For 1145506/1145506 co-relation queries the response was YES. [2024-06-03 19:38:45,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59142 conditions, 6202 events. 3833/6202 cut-off events. For 1145506/1145506 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 38257 event pairs, 869 based on Foata normal form. 1/6200 useless extension candidates. Maximal degree in co-relation 58996. Up to 5776 conditions per place. [2024-06-03 19:38:45,488 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 402 selfloop transitions, 18 changer transitions 0/431 dead transitions. [2024-06-03 19:38:45,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 431 transitions, 5922 flow [2024-06-03 19:38:45,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:45,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:38:45,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 19:38:45,489 INFO L175 Difference]: Start difference. First operand has 300 places, 412 transitions, 4972 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:38:45,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 431 transitions, 5922 flow [2024-06-03 19:38:47,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 431 transitions, 5822 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-03 19:38:47,211 INFO L231 Difference]: Finished difference. Result has 302 places, 415 transitions, 4984 flow [2024-06-03 19:38:47,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4872, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4984, PETRI_PLACES=302, PETRI_TRANSITIONS=415} [2024-06-03 19:38:47,211 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 256 predicate places. [2024-06-03 19:38:47,211 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 415 transitions, 4984 flow [2024-06-03 19:38:47,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:47,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:47,212 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 19:38:47,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 19:38:47,212 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:47,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:47,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1938111633, now seen corresponding path program 2 times [2024-06-03 19:38:47,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:47,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615087921] [2024-06-03 19:38:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:47,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:48,064 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 19:38:48,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:48,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615087921] [2024-06-03 19:38:48,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615087921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:48,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:48,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:48,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172394296] [2024-06-03 19:38:48,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:48,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:48,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:48,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:48,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:48,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:38:48,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 415 transitions, 4984 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:48,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:48,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:38:48,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:49,530 INFO L124 PetriNetUnfolderBase]: 3846/6220 cut-off events. [2024-06-03 19:38:49,531 INFO L125 PetriNetUnfolderBase]: For 1172151/1172151 co-relation queries the response was YES. [2024-06-03 19:38:49,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59854 conditions, 6220 events. 3846/6220 cut-off events. For 1172151/1172151 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 38354 event pairs, 869 based on Foata normal form. 1/6218 useless extension candidates. Maximal degree in co-relation 59707. Up to 5778 conditions per place. [2024-06-03 19:38:49,609 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 394 selfloop transitions, 30 changer transitions 0/435 dead transitions. [2024-06-03 19:38:49,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 435 transitions, 6198 flow [2024-06-03 19:38:49,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:49,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:38:49,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-03 19:38:49,611 INFO L175 Difference]: Start difference. First operand has 302 places, 415 transitions, 4984 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:38:49,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 435 transitions, 6198 flow [2024-06-03 19:38:51,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 435 transitions, 6108 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-03 19:38:51,393 INFO L231 Difference]: Finished difference. Result has 304 places, 421 transitions, 5106 flow [2024-06-03 19:38:51,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4894, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5106, PETRI_PLACES=304, PETRI_TRANSITIONS=421} [2024-06-03 19:38:51,393 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 258 predicate places. [2024-06-03 19:38:51,393 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 421 transitions, 5106 flow [2024-06-03 19:38:51,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:51,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:51,394 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 19:38:51,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 19:38:51,394 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:51,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:51,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2017273382, now seen corresponding path program 3 times [2024-06-03 19:38:51,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:51,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544754005] [2024-06-03 19:38:51,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:51,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:52,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:52,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544754005] [2024-06-03 19:38:52,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544754005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:52,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:52,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:52,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151459508] [2024-06-03 19:38:52,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:52,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:52,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:52,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:52,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:52,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:38:52,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 421 transitions, 5106 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:38:52,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:52,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:38:52,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:53,911 INFO L124 PetriNetUnfolderBase]: 3775/6155 cut-off events. [2024-06-03 19:38:53,911 INFO L125 PetriNetUnfolderBase]: For 1207261/1207261 co-relation queries the response was YES. [2024-06-03 19:38:53,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60127 conditions, 6155 events. 3775/6155 cut-off events. For 1207261/1207261 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 38349 event pairs, 841 based on Foata normal form. 2/6154 useless extension candidates. Maximal degree in co-relation 59979. Up to 5502 conditions per place. [2024-06-03 19:38:53,988 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 368 selfloop transitions, 30 changer transitions 0/439 dead transitions. [2024-06-03 19:38:53,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 439 transitions, 6020 flow [2024-06-03 19:38:53,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:53,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:53,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-03 19:38:53,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:38:53,990 INFO L175 Difference]: Start difference. First operand has 304 places, 421 transitions, 5106 flow. Second operand 8 states and 160 transitions. [2024-06-03 19:38:53,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 439 transitions, 6020 flow [2024-06-03 19:38:55,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 439 transitions, 5919 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-03 19:38:55,784 INFO L231 Difference]: Finished difference. Result has 308 places, 424 transitions, 5151 flow [2024-06-03 19:38:55,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5005, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5151, PETRI_PLACES=308, PETRI_TRANSITIONS=424} [2024-06-03 19:38:55,791 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 262 predicate places. [2024-06-03 19:38:55,791 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 424 transitions, 5151 flow [2024-06-03 19:38:55,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:38:55,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:55,791 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 19:38:55,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 19:38:55,792 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:55,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:55,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1938119073, now seen corresponding path program 3 times [2024-06-03 19:38:55,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:55,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556258309] [2024-06-03 19:38:55,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:55,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:56,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:56,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556258309] [2024-06-03 19:38:56,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556258309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:56,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:56,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:56,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627389377] [2024-06-03 19:38:56,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:56,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:56,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:56,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:56,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:56,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:38:56,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 424 transitions, 5151 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:56,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:56,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:38:56,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:58,146 INFO L124 PetriNetUnfolderBase]: 3853/6232 cut-off events. [2024-06-03 19:38:58,147 INFO L125 PetriNetUnfolderBase]: For 1218532/1218532 co-relation queries the response was YES. [2024-06-03 19:38:58,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61104 conditions, 6232 events. 3853/6232 cut-off events. For 1218532/1218532 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 38435 event pairs, 869 based on Foata normal form. 1/6230 useless extension candidates. Maximal degree in co-relation 60954. Up to 5789 conditions per place. [2024-06-03 19:38:58,240 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 395 selfloop transitions, 31 changer transitions 0/437 dead transitions. [2024-06-03 19:38:58,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 437 transitions, 6039 flow [2024-06-03 19:38:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:58,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:58,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:38:58,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 19:38:58,242 INFO L175 Difference]: Start difference. First operand has 308 places, 424 transitions, 5151 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:38:58,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 437 transitions, 6039 flow [2024-06-03 19:39:00,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 437 transitions, 5867 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-03 19:39:00,485 INFO L231 Difference]: Finished difference. Result has 310 places, 424 transitions, 5047 flow [2024-06-03 19:39:00,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4979, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5047, PETRI_PLACES=310, PETRI_TRANSITIONS=424} [2024-06-03 19:39:00,486 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 264 predicate places. [2024-06-03 19:39:00,486 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 424 transitions, 5047 flow [2024-06-03 19:39:00,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:00,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:00,486 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 19:39:00,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 19:39:00,486 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 19:39:00,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:00,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1938119352, now seen corresponding path program 1 times [2024-06-03 19:39:00,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:00,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6443395] [2024-06-03 19:39:00,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:00,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:01,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:01,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6443395] [2024-06-03 19:39:01,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6443395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:01,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:01,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:39:01,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589600163] [2024-06-03 19:39:01,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:01,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:39:01,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:01,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:39:01,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:39:01,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:39:01,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 424 transitions, 5047 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:39:01,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:01,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:39:01,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:02,763 INFO L124 PetriNetUnfolderBase]: 3697/6040 cut-off events. [2024-06-03 19:39:02,763 INFO L125 PetriNetUnfolderBase]: For 1245525/1245525 co-relation queries the response was YES. [2024-06-03 19:39:02,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60310 conditions, 6040 events. 3697/6040 cut-off events. For 1245525/1245525 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 37832 event pairs, 833 based on Foata normal form. 2/5991 useless extension candidates. Maximal degree in co-relation 60159. Up to 5477 conditions per place. [2024-06-03 19:39:02,850 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 390 selfloop transitions, 18 changer transitions 0/440 dead transitions. [2024-06-03 19:39:02,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 440 transitions, 5967 flow [2024-06-03 19:39:02,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:39:02,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:39:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:39:02,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-03 19:39:02,851 INFO L175 Difference]: Start difference. First operand has 310 places, 424 transitions, 5047 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:39:02,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 440 transitions, 5967 flow [2024-06-03 19:39:04,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 440 transitions, 5897 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:39:04,851 INFO L231 Difference]: Finished difference. Result has 311 places, 427 transitions, 5093 flow [2024-06-03 19:39:04,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4977, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5093, PETRI_PLACES=311, PETRI_TRANSITIONS=427} [2024-06-03 19:39:04,852 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 265 predicate places. [2024-06-03 19:39:04,852 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 427 transitions, 5093 flow [2024-06-03 19:39:04,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:39:04,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:04,852 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 19:39:04,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 19:39:04,852 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 19:39:04,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:04,853 INFO L85 PathProgramCache]: Analyzing trace with hash 678817690, now seen corresponding path program 2 times [2024-06-03 19:39:04,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:04,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607069443] [2024-06-03 19:39:04,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:04,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:05,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:05,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607069443] [2024-06-03 19:39:05,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607069443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:05,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:05,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:39:05,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613532554] [2024-06-03 19:39:05,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:05,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:39:05,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:05,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:39:05,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:39:05,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:39:05,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 427 transitions, 5093 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:39:05,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:05,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:39:05,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:07,207 INFO L124 PetriNetUnfolderBase]: 3718/6072 cut-off events. [2024-06-03 19:39:07,207 INFO L125 PetriNetUnfolderBase]: For 1279391/1279394 co-relation queries the response was YES. [2024-06-03 19:39:07,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61356 conditions, 6072 events. 3718/6072 cut-off events. For 1279391/1279394 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 38020 event pairs, 837 based on Foata normal form. 4/6024 useless extension candidates. Maximal degree in co-relation 61204. Up to 5469 conditions per place. [2024-06-03 19:39:07,294 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 373 selfloop transitions, 43 changer transitions 0/448 dead transitions. [2024-06-03 19:39:07,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 448 transitions, 6569 flow [2024-06-03 19:39:07,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:07,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:07,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:39:07,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-03 19:39:07,295 INFO L175 Difference]: Start difference. First operand has 311 places, 427 transitions, 5093 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:39:07,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 448 transitions, 6569 flow [2024-06-03 19:39:09,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 448 transitions, 6475 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 19:39:09,356 INFO L231 Difference]: Finished difference. Result has 314 places, 436 transitions, 5319 flow [2024-06-03 19:39:09,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4999, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5319, PETRI_PLACES=314, PETRI_TRANSITIONS=436} [2024-06-03 19:39:09,356 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 268 predicate places. [2024-06-03 19:39:09,356 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 436 transitions, 5319 flow [2024-06-03 19:39:09,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:39:09,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:09,357 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 19:39:09,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 19:39:09,357 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 19:39:09,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:09,365 INFO L85 PathProgramCache]: Analyzing trace with hash 678817411, now seen corresponding path program 4 times [2024-06-03 19:39:09,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:09,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751424534] [2024-06-03 19:39:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:09,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:10,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:10,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751424534] [2024-06-03 19:39:10,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751424534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:10,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:10,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:39:10,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154286413] [2024-06-03 19:39:10,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:10,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:39:10,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:10,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:39:10,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:39:10,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:39:10,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 436 transitions, 5319 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:10,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:10,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:39:10,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:11,652 INFO L124 PetriNetUnfolderBase]: 3884/6280 cut-off events. [2024-06-03 19:39:11,652 INFO L125 PetriNetUnfolderBase]: For 1302408/1302411 co-relation queries the response was YES. [2024-06-03 19:39:11,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62935 conditions, 6280 events. 3884/6280 cut-off events. For 1302408/1302411 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 38754 event pairs, 876 based on Foata normal form. 1/6277 useless extension candidates. Maximal degree in co-relation 62782. Up to 5802 conditions per place. [2024-06-03 19:39:11,744 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 392 selfloop transitions, 50 changer transitions 0/453 dead transitions. [2024-06-03 19:39:11,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 453 transitions, 6593 flow [2024-06-03 19:39:11,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:39:11,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:39:11,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:39:11,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-03 19:39:11,745 INFO L175 Difference]: Start difference. First operand has 314 places, 436 transitions, 5319 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:39:11,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 453 transitions, 6593 flow [2024-06-03 19:39:13,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 453 transitions, 6490 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-03 19:39:13,723 INFO L231 Difference]: Finished difference. Result has 318 places, 442 transitions, 5492 flow [2024-06-03 19:39:13,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5216, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5492, PETRI_PLACES=318, PETRI_TRANSITIONS=442} [2024-06-03 19:39:13,725 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 272 predicate places. [2024-06-03 19:39:13,725 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 442 transitions, 5492 flow [2024-06-03 19:39:13,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:13,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:13,726 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 19:39:13,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 19:39:13,726 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 19:39:13,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:13,726 INFO L85 PathProgramCache]: Analyzing trace with hash 595884537, now seen corresponding path program 5 times [2024-06-03 19:39:13,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:13,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598799400] [2024-06-03 19:39:13,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:13,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:14,688 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 19:39:14,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:14,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598799400] [2024-06-03 19:39:14,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598799400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:14,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:14,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:39:14,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639457483] [2024-06-03 19:39:14,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:14,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:39:14,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:14,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:39:14,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:39:14,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:39:14,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 442 transitions, 5492 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:14,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:14,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:39:14,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:16,205 INFO L124 PetriNetUnfolderBase]: 3889/6287 cut-off events. [2024-06-03 19:39:16,206 INFO L125 PetriNetUnfolderBase]: For 1329634/1329637 co-relation queries the response was YES. [2024-06-03 19:39:16,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63575 conditions, 6287 events. 3889/6287 cut-off events. For 1329634/1329637 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 38804 event pairs, 876 based on Foata normal form. 1/6284 useless extension candidates. Maximal degree in co-relation 63420. Up to 5808 conditions per place. [2024-06-03 19:39:16,298 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 394 selfloop transitions, 51 changer transitions 0/456 dead transitions. [2024-06-03 19:39:16,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 456 transitions, 6698 flow [2024-06-03 19:39:16,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:16,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:16,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:39:16,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-03 19:39:16,299 INFO L175 Difference]: Start difference. First operand has 318 places, 442 transitions, 5492 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:39:16,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 456 transitions, 6698 flow [2024-06-03 19:39:19,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 456 transitions, 6581 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-03 19:39:19,401 INFO L231 Difference]: Finished difference. Result has 323 places, 445 transitions, 5571 flow [2024-06-03 19:39:19,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5379, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5571, PETRI_PLACES=323, PETRI_TRANSITIONS=445} [2024-06-03 19:39:19,402 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 277 predicate places. [2024-06-03 19:39:19,402 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 445 transitions, 5571 flow [2024-06-03 19:39:19,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:19,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:19,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:19,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 19:39:19,403 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:19,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:19,403 INFO L85 PathProgramCache]: Analyzing trace with hash 595884816, now seen corresponding path program 3 times [2024-06-03 19:39:19,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:19,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272124558] [2024-06-03 19:39:19,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:19,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:20,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:20,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272124558] [2024-06-03 19:39:20,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272124558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:20,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:20,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:39:20,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248775301] [2024-06-03 19:39:20,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:20,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:39:20,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:20,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:39:20,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:39:20,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:39:20,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 445 transitions, 5571 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:39:20,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:20,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:39:20,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:21,982 INFO L124 PetriNetUnfolderBase]: 3722/6078 cut-off events. [2024-06-03 19:39:21,983 INFO L125 PetriNetUnfolderBase]: For 1347997/1348000 co-relation queries the response was YES. [2024-06-03 19:39:22,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62585 conditions, 6078 events. 3722/6078 cut-off events. For 1347997/1348000 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 38038 event pairs, 836 based on Foata normal form. 4/6030 useless extension candidates. Maximal degree in co-relation 62428. Up to 5474 conditions per place. [2024-06-03 19:39:22,070 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 379 selfloop transitions, 42 changer transitions 0/456 dead transitions. [2024-06-03 19:39:22,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 456 transitions, 6643 flow [2024-06-03 19:39:22,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:22,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:39:22,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-03 19:39:22,072 INFO L175 Difference]: Start difference. First operand has 323 places, 445 transitions, 5571 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:39:22,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 456 transitions, 6643 flow [2024-06-03 19:39:24,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 456 transitions, 6407 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-03 19:39:24,102 INFO L231 Difference]: Finished difference. Result has 325 places, 445 transitions, 5425 flow [2024-06-03 19:39:24,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5335, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5425, PETRI_PLACES=325, PETRI_TRANSITIONS=445} [2024-06-03 19:39:24,102 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 279 predicate places. [2024-06-03 19:39:24,102 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 445 transitions, 5425 flow [2024-06-03 19:39:24,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:39:24,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:24,103 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 19:39:24,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 19:39:24,103 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 19:39:24,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:24,103 INFO L85 PathProgramCache]: Analyzing trace with hash 669613201, now seen corresponding path program 6 times [2024-06-03 19:39:24,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:24,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229501043] [2024-06-03 19:39:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:24,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:25,012 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 19:39:25,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:25,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229501043] [2024-06-03 19:39:25,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229501043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:25,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:25,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:39:25,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395421183] [2024-06-03 19:39:25,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:25,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:39:25,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:25,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:39:25,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:39:25,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:39:25,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 445 transitions, 5425 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:25,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:25,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:39:25,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:26,549 INFO L124 PetriNetUnfolderBase]: 3880/6275 cut-off events. [2024-06-03 19:39:26,549 INFO L125 PetriNetUnfolderBase]: For 1362826/1362829 co-relation queries the response was YES. [2024-06-03 19:39:26,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63541 conditions, 6275 events. 3880/6275 cut-off events. For 1362826/1362829 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 38779 event pairs, 875 based on Foata normal form. 1/6272 useless extension candidates. Maximal degree in co-relation 63383. Up to 5798 conditions per place. [2024-06-03 19:39:26,634 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 393 selfloop transitions, 51 changer transitions 0/455 dead transitions. [2024-06-03 19:39:26,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 455 transitions, 6339 flow [2024-06-03 19:39:26,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:39:26,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:39:26,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:39:26,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-03 19:39:26,636 INFO L175 Difference]: Start difference. First operand has 325 places, 445 transitions, 5425 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:39:26,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 455 transitions, 6339 flow [2024-06-03 19:39:28,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 455 transitions, 6159 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-03 19:39:28,643 INFO L231 Difference]: Finished difference. Result has 325 places, 445 transitions, 5353 flow [2024-06-03 19:39:28,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5245, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5353, PETRI_PLACES=325, PETRI_TRANSITIONS=445} [2024-06-03 19:39:28,644 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 279 predicate places. [2024-06-03 19:39:28,644 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 445 transitions, 5353 flow [2024-06-03 19:39:28,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:28,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:28,644 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 19:39:28,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 19:39:28,645 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 19:39:28,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:28,645 INFO L85 PathProgramCache]: Analyzing trace with hash 679144120, now seen corresponding path program 4 times [2024-06-03 19:39:28,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:28,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88644512] [2024-06-03 19:39:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:28,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:29,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:29,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88644512] [2024-06-03 19:39:29,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88644512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:29,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:29,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:39:29,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769743568] [2024-06-03 19:39:29,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:29,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:39:29,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:29,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:39:29,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:39:29,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:39:29,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 445 transitions, 5353 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:39:29,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:29,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:39:29,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:31,278 INFO L124 PetriNetUnfolderBase]: 3713/6066 cut-off events. [2024-06-03 19:39:31,279 INFO L125 PetriNetUnfolderBase]: For 1381127/1381130 co-relation queries the response was YES. [2024-06-03 19:39:31,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62456 conditions, 6066 events. 3713/6066 cut-off events. For 1381127/1381130 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 38036 event pairs, 836 based on Foata normal form. 4/6018 useless extension candidates. Maximal degree in co-relation 62297. Up to 5466 conditions per place. [2024-06-03 19:39:31,359 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 375 selfloop transitions, 45 changer transitions 0/455 dead transitions. [2024-06-03 19:39:31,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 455 transitions, 6219 flow [2024-06-03 19:39:31,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:31,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:31,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 19:39:31,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2024-06-03 19:39:31,361 INFO L175 Difference]: Start difference. First operand has 325 places, 445 transitions, 5353 flow. Second operand 9 states and 168 transitions. [2024-06-03 19:39:31,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 455 transitions, 6219 flow [2024-06-03 19:39:33,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 455 transitions, 6022 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-03 19:39:33,076 INFO L231 Difference]: Finished difference. Result has 326 places, 445 transitions, 5253 flow [2024-06-03 19:39:33,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5156, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5253, PETRI_PLACES=326, PETRI_TRANSITIONS=445} [2024-06-03 19:39:33,077 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 280 predicate places. [2024-06-03 19:39:33,077 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 445 transitions, 5253 flow [2024-06-03 19:39:33,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:39:33,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:33,077 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 19:39:33,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 19:39:33,078 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 19:39:33,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:33,096 INFO L85 PathProgramCache]: Analyzing trace with hash 669612984, now seen corresponding path program 4 times [2024-06-03 19:39:33,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:33,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856833227] [2024-06-03 19:39:33,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:33,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:34,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:34,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856833227] [2024-06-03 19:39:34,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856833227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:34,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:34,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:39:34,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521267488] [2024-06-03 19:39:34,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:34,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:39:34,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:34,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:39:34,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:39:34,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:39:34,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 445 transitions, 5253 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:39:34,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:34,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:39:34,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:35,540 INFO L124 PetriNetUnfolderBase]: 3793/6189 cut-off events. [2024-06-03 19:39:35,540 INFO L125 PetriNetUnfolderBase]: For 1403412/1403415 co-relation queries the response was YES. [2024-06-03 19:39:35,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62760 conditions, 6189 events. 3793/6189 cut-off events. For 1403412/1403415 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 38607 event pairs, 851 based on Foata normal form. 2/6187 useless extension candidates. Maximal degree in co-relation 62601. Up to 5511 conditions per place. [2024-06-03 19:39:35,634 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 377 selfloop transitions, 39 changer transitions 0/460 dead transitions. [2024-06-03 19:39:35,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 460 transitions, 6203 flow [2024-06-03 19:39:35,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:39:35,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:39:35,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:39:35,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-03 19:39:35,635 INFO L175 Difference]: Start difference. First operand has 326 places, 445 transitions, 5253 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:39:35,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 460 transitions, 6203 flow [2024-06-03 19:39:37,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 460 transitions, 6103 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 19:39:37,717 INFO L231 Difference]: Finished difference. Result has 326 places, 448 transitions, 5327 flow [2024-06-03 19:39:37,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5153, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5327, PETRI_PLACES=326, PETRI_TRANSITIONS=448} [2024-06-03 19:39:37,717 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 280 predicate places. [2024-06-03 19:39:37,717 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 448 transitions, 5327 flow [2024-06-03 19:39:37,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:39:37,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:37,718 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 19:39:37,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 19:39:37,718 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 19:39:37,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:37,719 INFO L85 PathProgramCache]: Analyzing trace with hash 679156024, now seen corresponding path program 1 times [2024-06-03 19:39:37,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:37,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863703742] [2024-06-03 19:39:37,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:37,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:38,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:38,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863703742] [2024-06-03 19:39:38,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863703742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:38,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:38,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:38,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871769777] [2024-06-03 19:39:38,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:38,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:38,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:38,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:38,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:38,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:39:38,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 448 transitions, 5327 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:38,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:38,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:39:38,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:40,330 INFO L124 PetriNetUnfolderBase]: 3832/6186 cut-off events. [2024-06-03 19:39:40,330 INFO L125 PetriNetUnfolderBase]: For 1417427/1417427 co-relation queries the response was YES. [2024-06-03 19:39:40,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63589 conditions, 6186 events. 3832/6186 cut-off events. For 1417427/1417427 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 38434 event pairs, 859 based on Foata normal form. 1/6136 useless extension candidates. Maximal degree in co-relation 63429. Up to 5737 conditions per place. [2024-06-03 19:39:40,423 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 412 selfloop transitions, 21 changer transitions 0/462 dead transitions. [2024-06-03 19:39:40,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 462 transitions, 6319 flow [2024-06-03 19:39:40,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:40,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 19:39:40,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2024-06-03 19:39:40,424 INFO L175 Difference]: Start difference. First operand has 326 places, 448 transitions, 5327 flow. Second operand 9 states and 159 transitions. [2024-06-03 19:39:40,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 462 transitions, 6319 flow [2024-06-03 19:39:42,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 462 transitions, 6167 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-03 19:39:42,164 INFO L231 Difference]: Finished difference. Result has 329 places, 451 transitions, 5327 flow [2024-06-03 19:39:42,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5175, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5327, PETRI_PLACES=329, PETRI_TRANSITIONS=451} [2024-06-03 19:39:42,164 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 283 predicate places. [2024-06-03 19:39:42,165 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 451 transitions, 5327 flow [2024-06-03 19:39:42,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:42,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:42,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:42,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 19:39:42,165 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 19:39:42,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:42,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1113654376, now seen corresponding path program 1 times [2024-06-03 19:39:42,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:42,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398443859] [2024-06-03 19:39:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:42,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:42,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:42,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398443859] [2024-06-03 19:39:42,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398443859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:42,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:42,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:39:42,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475525232] [2024-06-03 19:39:42,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:42,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:39:42,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:42,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:39:42,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:39:43,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:39:43,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 451 transitions, 5327 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:43,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:43,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:39:43,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:44,544 INFO L124 PetriNetUnfolderBase]: 3935/6327 cut-off events. [2024-06-03 19:39:44,544 INFO L125 PetriNetUnfolderBase]: For 1451625/1451628 co-relation queries the response was YES. [2024-06-03 19:39:44,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64747 conditions, 6327 events. 3935/6327 cut-off events. For 1451625/1451628 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 38914 event pairs, 821 based on Foata normal form. 2/6325 useless extension candidates. Maximal degree in co-relation 64586. Up to 5579 conditions per place. [2024-06-03 19:39:44,638 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 384 selfloop transitions, 55 changer transitions 0/477 dead transitions. [2024-06-03 19:39:44,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 477 transitions, 6374 flow [2024-06-03 19:39:44,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:39:44,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:39:44,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-03 19:39:44,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-03 19:39:44,640 INFO L175 Difference]: Start difference. First operand has 329 places, 451 transitions, 5327 flow. Second operand 8 states and 164 transitions. [2024-06-03 19:39:44,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 477 transitions, 6374 flow [2024-06-03 19:39:46,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 477 transitions, 6156 flow, removed 49 selfloop flow, removed 10 redundant places. [2024-06-03 19:39:46,486 INFO L231 Difference]: Finished difference. Result has 327 places, 455 transitions, 5336 flow [2024-06-03 19:39:46,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5109, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5336, PETRI_PLACES=327, PETRI_TRANSITIONS=455} [2024-06-03 19:39:46,486 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 281 predicate places. [2024-06-03 19:39:46,486 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 455 transitions, 5336 flow [2024-06-03 19:39:46,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:46,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:46,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:46,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 19:39:46,487 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 19:39:46,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:46,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1288579694, now seen corresponding path program 2 times [2024-06-03 19:39:46,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:46,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146980719] [2024-06-03 19:39:46,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:46,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:47,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:47,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146980719] [2024-06-03 19:39:47,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146980719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:47,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:47,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:39:47,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713307652] [2024-06-03 19:39:47,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:47,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:39:47,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:47,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:39:47,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:39:47,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:39:47,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 455 transitions, 5336 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:47,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:47,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:39:47,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:48,954 INFO L124 PetriNetUnfolderBase]: 3945/6341 cut-off events. [2024-06-03 19:39:48,955 INFO L125 PetriNetUnfolderBase]: For 1479307/1479310 co-relation queries the response was YES. [2024-06-03 19:39:49,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65778 conditions, 6341 events. 3945/6341 cut-off events. For 1479307/1479310 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 38939 event pairs, 821 based on Foata normal form. 2/6339 useless extension candidates. Maximal degree in co-relation 65617. Up to 5561 conditions per place. [2024-06-03 19:39:49,057 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 372 selfloop transitions, 68 changer transitions 0/478 dead transitions. [2024-06-03 19:39:49,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 478 transitions, 6383 flow [2024-06-03 19:39:49,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:39:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:39:49,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-03 19:39:49,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-03 19:39:49,059 INFO L175 Difference]: Start difference. First operand has 327 places, 455 transitions, 5336 flow. Second operand 8 states and 163 transitions. [2024-06-03 19:39:49,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 478 transitions, 6383 flow [2024-06-03 19:39:51,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 478 transitions, 6184 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-03 19:39:51,492 INFO L231 Difference]: Finished difference. Result has 329 places, 459 transitions, 5400 flow [2024-06-03 19:39:51,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5137, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5400, PETRI_PLACES=329, PETRI_TRANSITIONS=459} [2024-06-03 19:39:51,492 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 283 predicate places. [2024-06-03 19:39:51,493 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 459 transitions, 5400 flow [2024-06-03 19:39:51,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:51,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:51,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:51,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 19:39:51,493 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:51,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:51,493 INFO L85 PathProgramCache]: Analyzing trace with hash 741175920, now seen corresponding path program 1 times [2024-06-03 19:39:51,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:51,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220915007] [2024-06-03 19:39:51,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:51,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:52,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:52,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:52,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220915007] [2024-06-03 19:39:52,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220915007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:52,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:52,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:39:52,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881788097] [2024-06-03 19:39:52,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:52,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:39:52,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:52,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:39:52,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:39:52,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:39:52,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 459 transitions, 5400 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:52,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:52,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:39:52,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:53,949 INFO L124 PetriNetUnfolderBase]: 3882/6250 cut-off events. [2024-06-03 19:39:53,949 INFO L125 PetriNetUnfolderBase]: For 1527694/1527697 co-relation queries the response was YES. [2024-06-03 19:39:54,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66176 conditions, 6250 events. 3882/6250 cut-off events. For 1527694/1527697 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 38651 event pairs, 808 based on Foata normal form. 8/6206 useless extension candidates. Maximal degree in co-relation 66014. Up to 5628 conditions per place. [2024-06-03 19:39:54,049 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 398 selfloop transitions, 61 changer transitions 0/490 dead transitions. [2024-06-03 19:39:54,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 490 transitions, 6650 flow [2024-06-03 19:39:54,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:39:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:39:54,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:39:54,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-03 19:39:54,050 INFO L175 Difference]: Start difference. First operand has 329 places, 459 transitions, 5400 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:39:54,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 490 transitions, 6650 flow [2024-06-03 19:39:56,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 490 transitions, 6419 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-03 19:39:56,213 INFO L231 Difference]: Finished difference. Result has 331 places, 471 transitions, 5607 flow [2024-06-03 19:39:56,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5169, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5607, PETRI_PLACES=331, PETRI_TRANSITIONS=471} [2024-06-03 19:39:56,213 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 285 predicate places. [2024-06-03 19:39:56,213 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 471 transitions, 5607 flow [2024-06-03 19:39:56,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:56,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:56,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:56,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 19:39:56,214 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:56,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:56,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1120156254, now seen corresponding path program 2 times [2024-06-03 19:39:56,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:56,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998445268] [2024-06-03 19:39:56,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:56,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:57,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:57,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998445268] [2024-06-03 19:39:57,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998445268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:57,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:57,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:39:57,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774191521] [2024-06-03 19:39:57,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:57,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:39:57,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:57,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:39:57,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:39:57,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:39:57,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 471 transitions, 5607 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:57,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:57,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:39:57,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:58,705 INFO L124 PetriNetUnfolderBase]: 3912/6289 cut-off events. [2024-06-03 19:39:58,705 INFO L125 PetriNetUnfolderBase]: For 1555564/1555567 co-relation queries the response was YES. [2024-06-03 19:39:58,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66862 conditions, 6289 events. 3912/6289 cut-off events. For 1555564/1555567 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 38840 event pairs, 822 based on Foata normal form. 8/6245 useless extension candidates. Maximal degree in co-relation 66699. Up to 5449 conditions per place. [2024-06-03 19:39:58,804 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 323 selfloop transitions, 145 changer transitions 0/499 dead transitions. [2024-06-03 19:39:58,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 499 transitions, 7104 flow [2024-06-03 19:39:58,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:39:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:39:58,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:39:58,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-03 19:39:58,805 INFO L175 Difference]: Start difference. First operand has 331 places, 471 transitions, 5607 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:39:58,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 499 transitions, 7104 flow [2024-06-03 19:40:01,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 499 transitions, 6857 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-03 19:40:01,100 INFO L231 Difference]: Finished difference. Result has 333 places, 483 transitions, 5977 flow [2024-06-03 19:40:01,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5360, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5977, PETRI_PLACES=333, PETRI_TRANSITIONS=483} [2024-06-03 19:40:01,100 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 287 predicate places. [2024-06-03 19:40:01,100 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 483 transitions, 5977 flow [2024-06-03 19:40:01,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:01,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:01,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:01,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 19:40:01,101 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:01,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:01,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1349836246, now seen corresponding path program 3 times [2024-06-03 19:40:01,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:01,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496363436] [2024-06-03 19:40:01,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:01,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:02,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:02,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496363436] [2024-06-03 19:40:02,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496363436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:02,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:02,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:02,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738391806] [2024-06-03 19:40:02,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:02,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:02,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:02,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:02,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:02,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:40:02,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 483 transitions, 5977 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:02,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:02,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:40:02,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:03,581 INFO L124 PetriNetUnfolderBase]: 4031/6460 cut-off events. [2024-06-03 19:40:03,581 INFO L125 PetriNetUnfolderBase]: For 1578488/1578491 co-relation queries the response was YES. [2024-06-03 19:40:03,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68668 conditions, 6460 events. 4031/6460 cut-off events. For 1578488/1578491 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 39641 event pairs, 834 based on Foata normal form. 2/6458 useless extension candidates. Maximal degree in co-relation 68504. Up to 5519 conditions per place. [2024-06-03 19:40:03,681 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 366 selfloop transitions, 97 changer transitions 0/507 dead transitions. [2024-06-03 19:40:03,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 507 transitions, 7403 flow [2024-06-03 19:40:03,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:03,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-03 19:40:03,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-03 19:40:03,682 INFO L175 Difference]: Start difference. First operand has 333 places, 483 transitions, 5977 flow. Second operand 8 states and 161 transitions. [2024-06-03 19:40:03,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 507 transitions, 7403 flow [2024-06-03 19:40:05,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 507 transitions, 7045 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-03 19:40:05,966 INFO L231 Difference]: Finished difference. Result has 336 places, 490 transitions, 6024 flow [2024-06-03 19:40:05,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5619, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6024, PETRI_PLACES=336, PETRI_TRANSITIONS=490} [2024-06-03 19:40:05,967 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 290 predicate places. [2024-06-03 19:40:05,967 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 490 transitions, 6024 flow [2024-06-03 19:40:05,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:05,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:05,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:05,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 19:40:05,968 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:05,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:05,968 INFO L85 PathProgramCache]: Analyzing trace with hash -117360082, now seen corresponding path program 3 times [2024-06-03 19:40:05,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:05,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267091099] [2024-06-03 19:40:05,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:05,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:06,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:06,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267091099] [2024-06-03 19:40:06,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267091099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:06,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:06,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:06,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015602299] [2024-06-03 19:40:06,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:06,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:06,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:06,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:06,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:07,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:40:07,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 490 transitions, 6024 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:07,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:07,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:40:07,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:08,552 INFO L124 PetriNetUnfolderBase]: 3934/6321 cut-off events. [2024-06-03 19:40:08,553 INFO L125 PetriNetUnfolderBase]: For 1603116/1603119 co-relation queries the response was YES. [2024-06-03 19:40:08,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67914 conditions, 6321 events. 3934/6321 cut-off events. For 1603116/1603119 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 39048 event pairs, 823 based on Foata normal form. 8/6277 useless extension candidates. Maximal degree in co-relation 67749. Up to 5469 conditions per place. [2024-06-03 19:40:08,649 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 333 selfloop transitions, 146 changer transitions 0/512 dead transitions. [2024-06-03 19:40:08,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 512 transitions, 7422 flow [2024-06-03 19:40:08,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:08,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:08,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-03 19:40:08,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:40:08,654 INFO L175 Difference]: Start difference. First operand has 336 places, 490 transitions, 6024 flow. Second operand 8 states and 160 transitions. [2024-06-03 19:40:08,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 512 transitions, 7422 flow [2024-06-03 19:40:10,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 512 transitions, 7234 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-03 19:40:10,623 INFO L231 Difference]: Finished difference. Result has 340 places, 496 transitions, 6323 flow [2024-06-03 19:40:10,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5836, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6323, PETRI_PLACES=340, PETRI_TRANSITIONS=496} [2024-06-03 19:40:10,624 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 294 predicate places. [2024-06-03 19:40:10,624 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 496 transitions, 6323 flow [2024-06-03 19:40:10,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:10,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:10,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:10,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 19:40:10,625 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 19:40:10,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:10,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1615245183, now seen corresponding path program 1 times [2024-06-03 19:40:10,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:10,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621892704] [2024-06-03 19:40:10,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:10,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:12,010 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 19:40:12,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:12,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621892704] [2024-06-03 19:40:12,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621892704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:12,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:12,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:40:12,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933360683] [2024-06-03 19:40:12,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:12,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:40:12,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:12,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:40:12,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:40:12,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:40:12,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 496 transitions, 6323 flow. Second operand has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:12,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:12,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:40:12,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:14,006 INFO L124 PetriNetUnfolderBase]: 4191/6768 cut-off events. [2024-06-03 19:40:14,007 INFO L125 PetriNetUnfolderBase]: For 1651233/1651236 co-relation queries the response was YES. [2024-06-03 19:40:14,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70724 conditions, 6768 events. 4191/6768 cut-off events. For 1651233/1651236 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 42526 event pairs, 799 based on Foata normal form. 12/6776 useless extension candidates. Maximal degree in co-relation 70557. Up to 5237 conditions per place. [2024-06-03 19:40:14,112 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 396 selfloop transitions, 105 changer transitions 0/547 dead transitions. [2024-06-03 19:40:14,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 547 transitions, 7633 flow [2024-06-03 19:40:14,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:40:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:40:14,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-03 19:40:14,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4711111111111111 [2024-06-03 19:40:14,113 INFO L175 Difference]: Start difference. First operand has 340 places, 496 transitions, 6323 flow. Second operand 10 states and 212 transitions. [2024-06-03 19:40:14,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 547 transitions, 7633 flow [2024-06-03 19:40:16,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 547 transitions, 7282 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-03 19:40:16,521 INFO L231 Difference]: Finished difference. Result has 347 places, 507 transitions, 6373 flow [2024-06-03 19:40:16,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5972, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6373, PETRI_PLACES=347, PETRI_TRANSITIONS=507} [2024-06-03 19:40:16,522 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 301 predicate places. [2024-06-03 19:40:16,522 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 507 transitions, 6373 flow [2024-06-03 19:40:16,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:16,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:16,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:16,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 19:40:16,523 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:16,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:16,523 INFO L85 PathProgramCache]: Analyzing trace with hash 995151544, now seen corresponding path program 1 times [2024-06-03 19:40:16,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:16,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319028236] [2024-06-03 19:40:16,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:16,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:17,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:17,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319028236] [2024-06-03 19:40:17,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319028236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:17,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:17,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:17,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408118505] [2024-06-03 19:40:17,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:17,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:17,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:17,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:17,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:17,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:40:17,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 507 transitions, 6373 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:40:17,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:17,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:40:17,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:19,107 INFO L124 PetriNetUnfolderBase]: 4066/6635 cut-off events. [2024-06-03 19:40:19,107 INFO L125 PetriNetUnfolderBase]: For 1659733/1659738 co-relation queries the response was YES. [2024-06-03 19:40:19,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70596 conditions, 6635 events. 4066/6635 cut-off events. For 1659733/1659738 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42435 event pairs, 815 based on Foata normal form. 8/6568 useless extension candidates. Maximal degree in co-relation 70426. Up to 5727 conditions per place. [2024-06-03 19:40:19,216 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 420 selfloop transitions, 46 changer transitions 0/540 dead transitions. [2024-06-03 19:40:19,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 540 transitions, 7544 flow [2024-06-03 19:40:19,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:19,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:19,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-03 19:40:19,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2024-06-03 19:40:19,218 INFO L175 Difference]: Start difference. First operand has 347 places, 507 transitions, 6373 flow. Second operand 9 states and 186 transitions. [2024-06-03 19:40:19,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 540 transitions, 7544 flow [2024-06-03 19:40:21,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 540 transitions, 7332 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-03 19:40:21,967 INFO L231 Difference]: Finished difference. Result has 351 places, 516 transitions, 6471 flow [2024-06-03 19:40:21,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6161, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6471, PETRI_PLACES=351, PETRI_TRANSITIONS=516} [2024-06-03 19:40:21,968 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 305 predicate places. [2024-06-03 19:40:21,968 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 516 transitions, 6471 flow [2024-06-03 19:40:21,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:40:21,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:21,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:21,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 19:40:21,969 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:21,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:21,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1005627064, now seen corresponding path program 2 times [2024-06-03 19:40:21,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:21,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662911083] [2024-06-03 19:40:21,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:21,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:22,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:22,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662911083] [2024-06-03 19:40:22,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662911083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:22,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:22,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:22,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743533092] [2024-06-03 19:40:22,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:22,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:22,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:22,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:22,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:23,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:40:23,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 516 transitions, 6471 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:40:23,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:23,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:40:23,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:24,712 INFO L124 PetriNetUnfolderBase]: 4082/6671 cut-off events. [2024-06-03 19:40:24,712 INFO L125 PetriNetUnfolderBase]: For 1685911/1685916 co-relation queries the response was YES. [2024-06-03 19:40:24,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71220 conditions, 6671 events. 4082/6671 cut-off events. For 1685911/1685916 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 42803 event pairs, 831 based on Foata normal form. 8/6621 useless extension candidates. Maximal degree in co-relation 71049. Up to 5785 conditions per place. [2024-06-03 19:40:24,821 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 415 selfloop transitions, 50 changer transitions 0/539 dead transitions. [2024-06-03 19:40:24,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 539 transitions, 7593 flow [2024-06-03 19:40:24,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:24,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:24,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-03 19:40:24,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44938271604938274 [2024-06-03 19:40:24,822 INFO L175 Difference]: Start difference. First operand has 351 places, 516 transitions, 6471 flow. Second operand 9 states and 182 transitions. [2024-06-03 19:40:24,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 539 transitions, 7593 flow [2024-06-03 19:40:27,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 539 transitions, 7408 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-03 19:40:27,854 INFO L231 Difference]: Finished difference. Result has 356 places, 520 transitions, 6540 flow [2024-06-03 19:40:27,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6286, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6540, PETRI_PLACES=356, PETRI_TRANSITIONS=520} [2024-06-03 19:40:27,854 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 310 predicate places. [2024-06-03 19:40:27,854 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 520 transitions, 6540 flow [2024-06-03 19:40:27,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:40:27,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:27,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:27,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 19:40:27,855 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:27,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:27,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1349713114, now seen corresponding path program 3 times [2024-06-03 19:40:27,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:27,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282990351] [2024-06-03 19:40:27,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:27,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:28,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:28,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282990351] [2024-06-03 19:40:28,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282990351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:28,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:28,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:28,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699260749] [2024-06-03 19:40:28,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:28,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:28,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:28,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:28,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:28,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:40:28,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 520 transitions, 6540 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:40:28,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:28,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:40:28,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:30,487 INFO L124 PetriNetUnfolderBase]: 4098/6691 cut-off events. [2024-06-03 19:40:30,488 INFO L125 PetriNetUnfolderBase]: For 1719325/1719328 co-relation queries the response was YES. [2024-06-03 19:40:30,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71875 conditions, 6691 events. 4098/6691 cut-off events. For 1719325/1719328 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 42840 event pairs, 835 based on Foata normal form. 6/6645 useless extension candidates. Maximal degree in co-relation 71702. Up to 5714 conditions per place. [2024-06-03 19:40:30,596 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 371 selfloop transitions, 94 changer transitions 0/539 dead transitions. [2024-06-03 19:40:30,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 539 transitions, 7642 flow [2024-06-03 19:40:30,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:30,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-03 19:40:30,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-03 19:40:30,597 INFO L175 Difference]: Start difference. First operand has 356 places, 520 transitions, 6540 flow. Second operand 8 states and 164 transitions. [2024-06-03 19:40:30,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 539 transitions, 7642 flow [2024-06-03 19:40:34,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 539 transitions, 7440 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-03 19:40:34,047 INFO L231 Difference]: Finished difference. Result has 358 places, 523 transitions, 6668 flow [2024-06-03 19:40:34,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6338, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6668, PETRI_PLACES=358, PETRI_TRANSITIONS=523} [2024-06-03 19:40:34,048 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 312 predicate places. [2024-06-03 19:40:34,048 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 523 transitions, 6668 flow [2024-06-03 19:40:34,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:40:34,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:34,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:34,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 19:40:34,049 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:34,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:34,049 INFO L85 PathProgramCache]: Analyzing trace with hash 717113862, now seen corresponding path program 1 times [2024-06-03 19:40:34,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:34,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049401428] [2024-06-03 19:40:34,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:34,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:35,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:35,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049401428] [2024-06-03 19:40:35,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049401428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:35,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:35,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:40:35,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524941512] [2024-06-03 19:40:35,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:35,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:40:35,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:35,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:40:35,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:40:35,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:40:35,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 523 transitions, 6668 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:35,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:35,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:40:35,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:36,877 INFO L124 PetriNetUnfolderBase]: 4191/6792 cut-off events. [2024-06-03 19:40:36,877 INFO L125 PetriNetUnfolderBase]: For 1729271/1729276 co-relation queries the response was YES. [2024-06-03 19:40:36,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72823 conditions, 6792 events. 4191/6792 cut-off events. For 1729271/1729276 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 43103 event pairs, 858 based on Foata normal form. 6/6740 useless extension candidates. Maximal degree in co-relation 72649. Up to 6120 conditions per place. [2024-06-03 19:40:36,985 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 456 selfloop transitions, 58 changer transitions 0/547 dead transitions. [2024-06-03 19:40:36,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 547 transitions, 7886 flow [2024-06-03 19:40:36,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:40:36,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:40:36,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 19:40:36,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-03 19:40:36,986 INFO L175 Difference]: Start difference. First operand has 358 places, 523 transitions, 6668 flow. Second operand 10 states and 190 transitions. [2024-06-03 19:40:36,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 547 transitions, 7886 flow [2024-06-03 19:40:40,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 547 transitions, 7582 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-03 19:40:40,224 INFO L231 Difference]: Finished difference. Result has 363 places, 528 transitions, 6635 flow [2024-06-03 19:40:40,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6364, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6635, PETRI_PLACES=363, PETRI_TRANSITIONS=528} [2024-06-03 19:40:40,225 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 317 predicate places. [2024-06-03 19:40:40,225 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 528 transitions, 6635 flow [2024-06-03 19:40:40,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:40,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:40,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:40,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 19:40:40,225 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:40,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:40,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1362378704, now seen corresponding path program 2 times [2024-06-03 19:40:40,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:40,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314406742] [2024-06-03 19:40:40,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:40,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:41,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:41,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314406742] [2024-06-03 19:40:41,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314406742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:41,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:41,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:40:41,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649956616] [2024-06-03 19:40:41,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:41,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:40:41,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:41,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:40:41,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:40:41,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:40:41,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 528 transitions, 6635 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:41,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:41,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:40:41,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:43,012 INFO L124 PetriNetUnfolderBase]: 4241/6859 cut-off events. [2024-06-03 19:40:43,013 INFO L125 PetriNetUnfolderBase]: For 1792127/1792130 co-relation queries the response was YES. [2024-06-03 19:40:43,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74654 conditions, 6859 events. 4241/6859 cut-off events. For 1792127/1792130 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 43524 event pairs, 861 based on Foata normal form. 4/6811 useless extension candidates. Maximal degree in co-relation 74478. Up to 5847 conditions per place. [2024-06-03 19:40:43,132 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 371 selfloop transitions, 155 changer transitions 0/559 dead transitions. [2024-06-03 19:40:43,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 559 transitions, 8631 flow [2024-06-03 19:40:43,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:43,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-03 19:40:43,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4419753086419753 [2024-06-03 19:40:43,134 INFO L175 Difference]: Start difference. First operand has 363 places, 528 transitions, 6635 flow. Second operand 9 states and 179 transitions. [2024-06-03 19:40:43,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 559 transitions, 8631 flow [2024-06-03 19:40:46,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 559 transitions, 8418 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-03 19:40:46,776 INFO L231 Difference]: Finished difference. Result has 367 places, 540 transitions, 7275 flow [2024-06-03 19:40:46,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6422, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7275, PETRI_PLACES=367, PETRI_TRANSITIONS=540} [2024-06-03 19:40:46,776 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 321 predicate places. [2024-06-03 19:40:46,777 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 540 transitions, 7275 flow [2024-06-03 19:40:46,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:46,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:46,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:46,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 19:40:46,777 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:46,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:46,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1362796770, now seen corresponding path program 1 times [2024-06-03 19:40:46,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:46,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789483878] [2024-06-03 19:40:46,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:46,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:47,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:47,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789483878] [2024-06-03 19:40:47,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789483878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:47,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:47,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:40:47,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515803388] [2024-06-03 19:40:47,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:47,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:40:47,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:47,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:40:47,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:40:47,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:40:47,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 540 transitions, 7275 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:47,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:47,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:40:47,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:49,630 INFO L124 PetriNetUnfolderBase]: 4246/6868 cut-off events. [2024-06-03 19:40:49,630 INFO L125 PetriNetUnfolderBase]: For 1826193/1826195 co-relation queries the response was YES. [2024-06-03 19:40:49,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76215 conditions, 6868 events. 4246/6868 cut-off events. For 1826193/1826195 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 43580 event pairs, 858 based on Foata normal form. 3/6820 useless extension candidates. Maximal degree in co-relation 76036. Up to 6330 conditions per place. [2024-06-03 19:40:49,744 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 494 selfloop transitions, 33 changer transitions 0/560 dead transitions. [2024-06-03 19:40:49,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 560 transitions, 8496 flow [2024-06-03 19:40:49,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:40:49,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-03 19:40:49,760 INFO L175 Difference]: Start difference. First operand has 367 places, 540 transitions, 7275 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:40:49,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 560 transitions, 8496 flow [2024-06-03 19:40:53,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 560 transitions, 8279 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-03 19:40:53,638 INFO L231 Difference]: Finished difference. Result has 372 places, 543 transitions, 7254 flow [2024-06-03 19:40:53,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7254, PETRI_PLACES=372, PETRI_TRANSITIONS=543} [2024-06-03 19:40:53,639 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 326 predicate places. [2024-06-03 19:40:53,639 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 543 transitions, 7254 flow [2024-06-03 19:40:53,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:53,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:53,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:53,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 19:40:53,640 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:53,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:53,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1350143580, now seen corresponding path program 3 times [2024-06-03 19:40:53,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:53,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474741885] [2024-06-03 19:40:53,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:53,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:54,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:54,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474741885] [2024-06-03 19:40:54,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474741885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:54,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:54,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:40:54,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415975066] [2024-06-03 19:40:54,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:54,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:40:54,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:54,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:40:54,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:40:54,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:40:54,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 543 transitions, 7254 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:54,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:54,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:40:54,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:56,477 INFO L124 PetriNetUnfolderBase]: 4268/6896 cut-off events. [2024-06-03 19:40:56,478 INFO L125 PetriNetUnfolderBase]: For 1845702/1845705 co-relation queries the response was YES. [2024-06-03 19:40:56,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76806 conditions, 6896 events. 4268/6896 cut-off events. For 1845702/1845705 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43654 event pairs, 854 based on Foata normal form. 4/6848 useless extension candidates. Maximal degree in co-relation 76625. Up to 5867 conditions per place. [2024-06-03 19:40:56,601 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 376 selfloop transitions, 157 changer transitions 0/566 dead transitions. [2024-06-03 19:40:56,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 566 transitions, 9029 flow [2024-06-03 19:40:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:56,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:56,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-03 19:40:56,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2024-06-03 19:40:56,603 INFO L175 Difference]: Start difference. First operand has 372 places, 543 transitions, 7254 flow. Second operand 9 states and 177 transitions. [2024-06-03 19:40:56,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 566 transitions, 9029 flow [2024-06-03 19:41:00,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 566 transitions, 8857 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-03 19:41:00,271 INFO L231 Difference]: Finished difference. Result has 374 places, 547 transitions, 7525 flow [2024-06-03 19:41:00,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7082, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7525, PETRI_PLACES=374, PETRI_TRANSITIONS=547} [2024-06-03 19:41:00,272 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 328 predicate places. [2024-06-03 19:41:00,272 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 547 transitions, 7525 flow [2024-06-03 19:41:00,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:00,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:00,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:00,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 19:41:00,272 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:00,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:00,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1362782324, now seen corresponding path program 4 times [2024-06-03 19:41:00,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:00,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772217898] [2024-06-03 19:41:00,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:00,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:01,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:01,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772217898] [2024-06-03 19:41:01,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772217898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:01,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:01,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:41:01,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041592525] [2024-06-03 19:41:01,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:01,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:41:01,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:01,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:41:01,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:41:01,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:41:01,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 547 transitions, 7525 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:01,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:01,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:41:01,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:03,098 INFO L124 PetriNetUnfolderBase]: 4264/6891 cut-off events. [2024-06-03 19:41:03,098 INFO L125 PetriNetUnfolderBase]: For 1860798/1860801 co-relation queries the response was YES. [2024-06-03 19:41:03,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77134 conditions, 6891 events. 4264/6891 cut-off events. For 1860798/1860801 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 43642 event pairs, 860 based on Foata normal form. 4/6843 useless extension candidates. Maximal degree in co-relation 76952. Up to 5865 conditions per place. [2024-06-03 19:41:03,213 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 377 selfloop transitions, 155 changer transitions 0/565 dead transitions. [2024-06-03 19:41:03,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 565 transitions, 8941 flow [2024-06-03 19:41:03,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:41:03,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:41:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-03 19:41:03,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2024-06-03 19:41:03,215 INFO L175 Difference]: Start difference. First operand has 374 places, 547 transitions, 7525 flow. Second operand 9 states and 177 transitions. [2024-06-03 19:41:03,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 565 transitions, 8941 flow [2024-06-03 19:41:06,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 565 transitions, 8407 flow, removed 103 selfloop flow, removed 7 redundant places. [2024-06-03 19:41:06,509 INFO L231 Difference]: Finished difference. Result has 376 places, 547 transitions, 7310 flow [2024-06-03 19:41:06,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6991, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7310, PETRI_PLACES=376, PETRI_TRANSITIONS=547} [2024-06-03 19:41:06,509 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 330 predicate places. [2024-06-03 19:41:06,510 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 547 transitions, 7310 flow [2024-06-03 19:41:06,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:06,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:06,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:06,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 19:41:06,510 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:06,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:06,510 INFO L85 PathProgramCache]: Analyzing trace with hash -641668270, now seen corresponding path program 4 times [2024-06-03 19:41:06,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:06,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211576185] [2024-06-03 19:41:06,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:06,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:07,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:07,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211576185] [2024-06-03 19:41:07,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211576185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:07,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:07,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:07,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511117739] [2024-06-03 19:41:07,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:07,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:07,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:07,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:07,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:07,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:41:07,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 547 transitions, 7310 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:07,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:07,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:41:07,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:09,200 INFO L124 PetriNetUnfolderBase]: 4343/6999 cut-off events. [2024-06-03 19:41:09,200 INFO L125 PetriNetUnfolderBase]: For 1888875/1888875 co-relation queries the response was YES. [2024-06-03 19:41:09,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77768 conditions, 6999 events. 4343/6999 cut-off events. For 1888875/1888875 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44030 event pairs, 876 based on Foata normal form. 1/6981 useless extension candidates. Maximal degree in co-relation 77586. Up to 6201 conditions per place. [2024-06-03 19:41:09,322 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 464 selfloop transitions, 60 changer transitions 0/570 dead transitions. [2024-06-03 19:41:09,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 570 transitions, 8519 flow [2024-06-03 19:41:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:09,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-03 19:41:09,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-03 19:41:09,324 INFO L175 Difference]: Start difference. First operand has 376 places, 547 transitions, 7310 flow. Second operand 8 states and 161 transitions. [2024-06-03 19:41:09,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 570 transitions, 8519 flow [2024-06-03 19:41:13,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 570 transitions, 8232 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 19:41:13,796 INFO L231 Difference]: Finished difference. Result has 377 places, 550 transitions, 7255 flow [2024-06-03 19:41:13,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7023, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7255, PETRI_PLACES=377, PETRI_TRANSITIONS=550} [2024-06-03 19:41:13,796 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 331 predicate places. [2024-06-03 19:41:13,796 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 550 transitions, 7255 flow [2024-06-03 19:41:13,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:13,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:13,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:13,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 19:41:13,797 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:13,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:13,797 INFO L85 PathProgramCache]: Analyzing trace with hash -220586094, now seen corresponding path program 5 times [2024-06-03 19:41:13,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:13,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368148004] [2024-06-03 19:41:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:13,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:14,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:14,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368148004] [2024-06-03 19:41:14,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368148004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:14,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:14,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:14,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186409965] [2024-06-03 19:41:14,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:14,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:14,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:14,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:14,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:14,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:41:14,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 550 transitions, 7255 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:14,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:14,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:41:14,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:16,385 INFO L124 PetriNetUnfolderBase]: 4356/7026 cut-off events. [2024-06-03 19:41:16,385 INFO L125 PetriNetUnfolderBase]: For 1928798/1928798 co-relation queries the response was YES. [2024-06-03 19:41:16,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78359 conditions, 7026 events. 4356/7026 cut-off events. For 1928798/1928798 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 44336 event pairs, 875 based on Foata normal form. 1/7006 useless extension candidates. Maximal degree in co-relation 78176. Up to 6203 conditions per place. [2024-06-03 19:41:16,504 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 456 selfloop transitions, 72 changer transitions 0/574 dead transitions. [2024-06-03 19:41:16,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 574 transitions, 8828 flow [2024-06-03 19:41:16,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:16,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:16,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-03 19:41:16,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-03 19:41:16,505 INFO L175 Difference]: Start difference. First operand has 377 places, 550 transitions, 7255 flow. Second operand 8 states and 161 transitions. [2024-06-03 19:41:16,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 574 transitions, 8828 flow [2024-06-03 19:41:20,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 574 transitions, 8622 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:20,506 INFO L231 Difference]: Finished difference. Result has 380 places, 556 transitions, 7446 flow [2024-06-03 19:41:20,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7049, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7446, PETRI_PLACES=380, PETRI_TRANSITIONS=556} [2024-06-03 19:41:20,507 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 334 predicate places. [2024-06-03 19:41:20,507 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 556 transitions, 7446 flow [2024-06-03 19:41:20,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:20,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:20,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:20,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 19:41:20,507 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 19:41:20,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:20,508 INFO L85 PathProgramCache]: Analyzing trace with hash -461819724, now seen corresponding path program 6 times [2024-06-03 19:41:20,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:20,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069460956] [2024-06-03 19:41:20,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:20,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:21,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:21,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:21,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069460956] [2024-06-03 19:41:21,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069460956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:21,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:21,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:21,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871174858] [2024-06-03 19:41:21,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:21,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:21,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:21,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:21,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:21,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:41:21,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 556 transitions, 7446 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:21,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:21,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:41:21,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:23,216 INFO L124 PetriNetUnfolderBase]: 4353/7022 cut-off events. [2024-06-03 19:41:23,216 INFO L125 PetriNetUnfolderBase]: For 1952130/1952130 co-relation queries the response was YES. [2024-06-03 19:41:23,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78728 conditions, 7022 events. 4353/7022 cut-off events. For 1952130/1952130 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 44307 event pairs, 876 based on Foata normal form. 1/7002 useless extension candidates. Maximal degree in co-relation 78543. Up to 6215 conditions per place. [2024-06-03 19:41:23,340 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 471 selfloop transitions, 60 changer transitions 0/577 dead transitions. [2024-06-03 19:41:23,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 577 transitions, 8574 flow [2024-06-03 19:41:23,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:41:23,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:41:23,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-03 19:41:23,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2024-06-03 19:41:23,342 INFO L175 Difference]: Start difference. First operand has 380 places, 556 transitions, 7446 flow. Second operand 9 states and 175 transitions. [2024-06-03 19:41:23,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 577 transitions, 8574 flow [2024-06-03 19:41:27,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 577 transitions, 8313 flow, removed 94 selfloop flow, removed 4 redundant places. [2024-06-03 19:41:27,134 INFO L231 Difference]: Finished difference. Result has 385 places, 556 transitions, 7311 flow [2024-06-03 19:41:27,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7185, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7311, PETRI_PLACES=385, PETRI_TRANSITIONS=556} [2024-06-03 19:41:27,134 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 339 predicate places. [2024-06-03 19:41:27,134 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 556 transitions, 7311 flow [2024-06-03 19:41:27,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:27,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:27,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:27,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 19:41:27,135 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 19:41:27,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:27,136 INFO L85 PathProgramCache]: Analyzing trace with hash -461640234, now seen corresponding path program 7 times [2024-06-03 19:41:27,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:27,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298242804] [2024-06-03 19:41:27,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:27,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:27,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:27,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298242804] [2024-06-03 19:41:27,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298242804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:27,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:27,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:27,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901049335] [2024-06-03 19:41:27,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:27,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:27,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:27,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:27,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:28,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:41:28,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 556 transitions, 7311 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:28,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:28,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:41:28,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:29,777 INFO L124 PetriNetUnfolderBase]: 4349/7007 cut-off events. [2024-06-03 19:41:29,777 INFO L125 PetriNetUnfolderBase]: For 1974598/1974598 co-relation queries the response was YES. [2024-06-03 19:41:29,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78731 conditions, 7007 events. 4349/7007 cut-off events. For 1974598/1974598 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44100 event pairs, 875 based on Foata normal form. 1/6987 useless extension candidates. Maximal degree in co-relation 78544. Up to 6197 conditions per place. [2024-06-03 19:41:29,901 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 464 selfloop transitions, 67 changer transitions 0/577 dead transitions. [2024-06-03 19:41:29,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 577 transitions, 8541 flow [2024-06-03 19:41:29,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:29,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:29,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:41:29,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-03 19:41:29,902 INFO L175 Difference]: Start difference. First operand has 385 places, 556 transitions, 7311 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:41:29,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 577 transitions, 8541 flow [2024-06-03 19:41:34,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 577 transitions, 8424 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 19:41:34,274 INFO L231 Difference]: Finished difference. Result has 386 places, 559 transitions, 7453 flow [2024-06-03 19:41:34,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7194, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7453, PETRI_PLACES=386, PETRI_TRANSITIONS=559} [2024-06-03 19:41:34,275 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 340 predicate places. [2024-06-03 19:41:34,275 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 559 transitions, 7453 flow [2024-06-03 19:41:34,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:34,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:34,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:34,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 19:41:34,276 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:34,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:34,276 INFO L85 PathProgramCache]: Analyzing trace with hash -461639986, now seen corresponding path program 4 times [2024-06-03 19:41:34,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:34,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663666254] [2024-06-03 19:41:34,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:34,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:35,195 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 19:41:35,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:35,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663666254] [2024-06-03 19:41:35,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663666254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:35,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:35,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:41:35,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079785475] [2024-06-03 19:41:35,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:35,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:41:35,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:35,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:41:35,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:41:35,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:41:35,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 559 transitions, 7453 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:35,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:35,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:41:35,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:37,094 INFO L124 PetriNetUnfolderBase]: 4264/6890 cut-off events. [2024-06-03 19:41:37,094 INFO L125 PetriNetUnfolderBase]: For 1990824/1990824 co-relation queries the response was YES. [2024-06-03 19:41:37,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78042 conditions, 6890 events. 4264/6890 cut-off events. For 1990824/1990824 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 43616 event pairs, 856 based on Foata normal form. 2/6828 useless extension candidates. Maximal degree in co-relation 77854. Up to 6225 conditions per place. [2024-06-03 19:41:37,222 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 485 selfloop transitions, 54 changer transitions 0/576 dead transitions. [2024-06-03 19:41:37,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 576 transitions, 8583 flow [2024-06-03 19:41:37,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:41:37,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:41:37,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:41:37,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41728395061728396 [2024-06-03 19:41:37,223 INFO L175 Difference]: Start difference. First operand has 386 places, 559 transitions, 7453 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:41:37,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 576 transitions, 8583 flow [2024-06-03 19:41:41,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 576 transitions, 8296 flow, removed 79 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:41,046 INFO L231 Difference]: Finished difference. Result has 389 places, 559 transitions, 7284 flow [2024-06-03 19:41:41,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7166, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7284, PETRI_PLACES=389, PETRI_TRANSITIONS=559} [2024-06-03 19:41:41,046 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 343 predicate places. [2024-06-03 19:41:41,046 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 559 transitions, 7284 flow [2024-06-03 19:41:41,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:41,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:41,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:41,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 19:41:41,047 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:41,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:41,047 INFO L85 PathProgramCache]: Analyzing trace with hash -48333106, now seen corresponding path program 5 times [2024-06-03 19:41:41,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:41,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102894027] [2024-06-03 19:41:41,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:41,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:41,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:41,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102894027] [2024-06-03 19:41:41,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102894027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:41,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:41,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:41,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982408089] [2024-06-03 19:41:41,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:41,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:41,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:41,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:41,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:42,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:41:42,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 559 transitions, 7284 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:42,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:42,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:41:42,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:43,745 INFO L124 PetriNetUnfolderBase]: 4277/6898 cut-off events. [2024-06-03 19:41:43,746 INFO L125 PetriNetUnfolderBase]: For 2019717/2019717 co-relation queries the response was YES. [2024-06-03 19:41:43,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78397 conditions, 6898 events. 4277/6898 cut-off events. For 2019717/2019717 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43556 event pairs, 855 based on Foata normal form. 1/6835 useless extension candidates. Maximal degree in co-relation 78208. Up to 6191 conditions per place. [2024-06-03 19:41:43,877 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 460 selfloop transitions, 83 changer transitions 0/580 dead transitions. [2024-06-03 19:41:43,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 580 transitions, 8799 flow [2024-06-03 19:41:43,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:43,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:43,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 19:41:43,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-03 19:41:43,878 INFO L175 Difference]: Start difference. First operand has 389 places, 559 transitions, 7284 flow. Second operand 8 states and 157 transitions. [2024-06-03 19:41:43,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 580 transitions, 8799 flow [2024-06-03 19:41:47,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 580 transitions, 8467 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-03 19:41:47,855 INFO L231 Difference]: Finished difference. Result has 389 places, 565 transitions, 7278 flow [2024-06-03 19:41:47,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6952, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7278, PETRI_PLACES=389, PETRI_TRANSITIONS=565} [2024-06-03 19:41:47,856 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 343 predicate places. [2024-06-03 19:41:47,856 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 565 transitions, 7278 flow [2024-06-03 19:41:47,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:47,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:47,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:47,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 19:41:47,857 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:47,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:47,857 INFO L85 PathProgramCache]: Analyzing trace with hash -690734268, now seen corresponding path program 8 times [2024-06-03 19:41:47,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:47,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949243775] [2024-06-03 19:41:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:47,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:48,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:48,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949243775] [2024-06-03 19:41:48,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949243775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:48,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:48,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:48,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549779881] [2024-06-03 19:41:48,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:48,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:48,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:48,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:48,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:48,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:41:48,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 565 transitions, 7278 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:48,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:48,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:41:48,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:50,552 INFO L124 PetriNetUnfolderBase]: 4364/7025 cut-off events. [2024-06-03 19:41:50,553 INFO L125 PetriNetUnfolderBase]: For 2068248/2068248 co-relation queries the response was YES. [2024-06-03 19:41:50,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79754 conditions, 7025 events. 4364/7025 cut-off events. For 2068248/2068248 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44136 event pairs, 874 based on Foata normal form. 1/7005 useless extension candidates. Maximal degree in co-relation 79563. Up to 6155 conditions per place. [2024-06-03 19:41:50,679 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 438 selfloop transitions, 100 changer transitions 0/586 dead transitions. [2024-06-03 19:41:50,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 586 transitions, 8895 flow [2024-06-03 19:41:50,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:50,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:41:50,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-03 19:41:50,681 INFO L175 Difference]: Start difference. First operand has 389 places, 565 transitions, 7278 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:41:50,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 586 transitions, 8895 flow [2024-06-03 19:41:55,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 586 transitions, 8689 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 19:41:55,470 INFO L231 Difference]: Finished difference. Result has 392 places, 571 transitions, 7528 flow [2024-06-03 19:41:55,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7072, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7528, PETRI_PLACES=392, PETRI_TRANSITIONS=571} [2024-06-03 19:41:55,470 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 346 predicate places. [2024-06-03 19:41:55,470 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 571 transitions, 7528 flow [2024-06-03 19:41:55,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:55,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:55,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:55,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 19:41:55,470 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:55,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:55,471 INFO L85 PathProgramCache]: Analyzing trace with hash -47857876, now seen corresponding path program 6 times [2024-06-03 19:41:55,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:55,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474852903] [2024-06-03 19:41:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:55,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:56,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:56,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474852903] [2024-06-03 19:41:56,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474852903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:56,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:56,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:56,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855065902] [2024-06-03 19:41:56,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:56,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:56,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:56,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:56,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:56,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:41:56,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 571 transitions, 7528 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:56,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:56,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:41:56,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:58,217 INFO L124 PetriNetUnfolderBase]: 4287/6912 cut-off events. [2024-06-03 19:41:58,217 INFO L125 PetriNetUnfolderBase]: For 2086407/2086407 co-relation queries the response was YES. [2024-06-03 19:41:58,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79407 conditions, 6912 events. 4287/6912 cut-off events. For 2086407/2086407 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 43599 event pairs, 855 based on Foata normal form. 1/6849 useless extension candidates. Maximal degree in co-relation 79215. Up to 6201 conditions per place. [2024-06-03 19:41:58,344 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 458 selfloop transitions, 88 changer transitions 0/585 dead transitions. [2024-06-03 19:41:58,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 585 transitions, 8661 flow [2024-06-03 19:41:58,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:58,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:58,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 19:41:58,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-03 19:41:58,346 INFO L175 Difference]: Start difference. First operand has 392 places, 571 transitions, 7528 flow. Second operand 8 states and 156 transitions. [2024-06-03 19:41:58,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 585 transitions, 8661 flow [2024-06-03 19:42:02,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 585 transitions, 8370 flow, removed 91 selfloop flow, removed 4 redundant places. [2024-06-03 19:42:02,228 INFO L231 Difference]: Finished difference. Result has 396 places, 571 transitions, 7419 flow [2024-06-03 19:42:02,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7237, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7419, PETRI_PLACES=396, PETRI_TRANSITIONS=571} [2024-06-03 19:42:02,229 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 350 predicate places. [2024-06-03 19:42:02,229 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 571 transitions, 7419 flow [2024-06-03 19:42:02,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:02,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:02,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:02,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 19:42:02,229 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:02,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:02,230 INFO L85 PathProgramCache]: Analyzing trace with hash -48096204, now seen corresponding path program 9 times [2024-06-03 19:42:02,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:02,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047838107] [2024-06-03 19:42:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:02,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:03,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:03,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047838107] [2024-06-03 19:42:03,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047838107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:03,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:03,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:03,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851829016] [2024-06-03 19:42:03,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:03,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:03,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:03,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:03,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:03,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:42:03,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 571 transitions, 7419 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:03,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:03,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:42:03,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:05,092 INFO L124 PetriNetUnfolderBase]: 4358/7017 cut-off events. [2024-06-03 19:42:05,092 INFO L125 PetriNetUnfolderBase]: For 2113779/2113779 co-relation queries the response was YES. [2024-06-03 19:42:05,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80108 conditions, 7017 events. 4358/7017 cut-off events. For 2113779/2113779 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44122 event pairs, 874 based on Foata normal form. 1/6997 useless extension candidates. Maximal degree in co-relation 79914. Up to 6149 conditions per place. [2024-06-03 19:42:05,212 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 433 selfloop transitions, 104 changer transitions 0/585 dead transitions. [2024-06-03 19:42:05,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 585 transitions, 8534 flow [2024-06-03 19:42:05,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:05,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:42:05,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-03 19:42:05,213 INFO L175 Difference]: Start difference. First operand has 396 places, 571 transitions, 7419 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:42:05,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 585 transitions, 8534 flow [2024-06-03 19:42:09,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 585 transitions, 8270 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-03 19:42:09,838 INFO L231 Difference]: Finished difference. Result has 397 places, 571 transitions, 7369 flow [2024-06-03 19:42:09,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7155, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7369, PETRI_PLACES=397, PETRI_TRANSITIONS=571} [2024-06-03 19:42:09,839 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 351 predicate places. [2024-06-03 19:42:09,839 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 571 transitions, 7369 flow [2024-06-03 19:42:09,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:09,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:09,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:09,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 19:42:09,839 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:09,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:09,840 INFO L85 PathProgramCache]: Analyzing trace with hash -893913684, now seen corresponding path program 7 times [2024-06-03 19:42:09,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:09,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589124534] [2024-06-03 19:42:09,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:09,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:10,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:10,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589124534] [2024-06-03 19:42:10,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589124534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:10,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:10,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:10,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636171790] [2024-06-03 19:42:10,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:10,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:10,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:10,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:10,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:10,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:42:10,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 571 transitions, 7369 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:10,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:10,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:42:10,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:12,700 INFO L124 PetriNetUnfolderBase]: 4294/6933 cut-off events. [2024-06-03 19:42:12,700 INFO L125 PetriNetUnfolderBase]: For 2144145/2144148 co-relation queries the response was YES. [2024-06-03 19:42:12,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79720 conditions, 6933 events. 4294/6933 cut-off events. For 2144145/2144148 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 43876 event pairs, 882 based on Foata normal form. 4/6872 useless extension candidates. Maximal degree in co-relation 79525. Up to 5907 conditions per place. [2024-06-03 19:42:12,828 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 375 selfloop transitions, 173 changer transitions 0/587 dead transitions. [2024-06-03 19:42:12,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 587 transitions, 9099 flow [2024-06-03 19:42:12,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:12,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:42:12,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-03 19:42:12,830 INFO L175 Difference]: Start difference. First operand has 397 places, 571 transitions, 7369 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:42:12,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 587 transitions, 9099 flow [2024-06-03 19:42:17,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 587 transitions, 8823 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-03 19:42:17,498 INFO L231 Difference]: Finished difference. Result has 397 places, 575 transitions, 7534 flow [2024-06-03 19:42:17,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7093, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7534, PETRI_PLACES=397, PETRI_TRANSITIONS=575} [2024-06-03 19:42:17,499 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 351 predicate places. [2024-06-03 19:42:17,499 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 575 transitions, 7534 flow [2024-06-03 19:42:17,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:17,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:17,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:17,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 19:42:17,500 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:17,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:17,500 INFO L85 PathProgramCache]: Analyzing trace with hash -894210602, now seen corresponding path program 10 times [2024-06-03 19:42:17,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:17,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872657891] [2024-06-03 19:42:17,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:17,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:18,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:18,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872657891] [2024-06-03 19:42:18,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872657891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:18,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:18,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:18,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505416844] [2024-06-03 19:42:18,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:18,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:18,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:18,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:18,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:18,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:42:18,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 575 transitions, 7534 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:18,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:18,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:42:18,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:20,296 INFO L124 PetriNetUnfolderBase]: 4380/7068 cut-off events. [2024-06-03 19:42:20,296 INFO L125 PetriNetUnfolderBase]: For 2185294/2185297 co-relation queries the response was YES. [2024-06-03 19:42:20,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80988 conditions, 7068 events. 4380/7068 cut-off events. For 2185294/2185297 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 44659 event pairs, 922 based on Foata normal form. 2/7050 useless extension candidates. Maximal degree in co-relation 80793. Up to 5992 conditions per place. [2024-06-03 19:42:20,428 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 420 selfloop transitions, 126 changer transitions 0/595 dead transitions. [2024-06-03 19:42:20,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 595 transitions, 9484 flow [2024-06-03 19:42:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:20,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:42:20,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-03 19:42:20,429 INFO L175 Difference]: Start difference. First operand has 397 places, 575 transitions, 7534 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:42:20,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 595 transitions, 9484 flow [2024-06-03 19:42:26,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 595 transitions, 9108 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-03 19:42:26,099 INFO L231 Difference]: Finished difference. Result has 400 places, 582 transitions, 7677 flow [2024-06-03 19:42:26,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7158, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7677, PETRI_PLACES=400, PETRI_TRANSITIONS=582} [2024-06-03 19:42:26,100 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 354 predicate places. [2024-06-03 19:42:26,100 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 582 transitions, 7677 flow [2024-06-03 19:42:26,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:26,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:26,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:26,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 19:42:26,101 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:26,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:26,101 INFO L85 PathProgramCache]: Analyzing trace with hash -42901094, now seen corresponding path program 8 times [2024-06-03 19:42:26,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:26,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390814076] [2024-06-03 19:42:26,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:26,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:27,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:27,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390814076] [2024-06-03 19:42:27,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390814076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:27,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:27,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:27,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096247673] [2024-06-03 19:42:27,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:27,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:27,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:27,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:27,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:27,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:42:27,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 582 transitions, 7677 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:27,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:27,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:42:27,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:28,896 INFO L124 PetriNetUnfolderBase]: 4314/6961 cut-off events. [2024-06-03 19:42:28,897 INFO L125 PetriNetUnfolderBase]: For 2216186/2216189 co-relation queries the response was YES. [2024-06-03 19:42:28,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80937 conditions, 6961 events. 4314/6961 cut-off events. For 2216186/2216189 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 44047 event pairs, 882 based on Foata normal form. 4/6900 useless extension candidates. Maximal degree in co-relation 80741. Up to 5924 conditions per place. [2024-06-03 19:42:29,019 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 379 selfloop transitions, 180 changer transitions 0/600 dead transitions. [2024-06-03 19:42:29,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 600 transitions, 9503 flow [2024-06-03 19:42:29,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:29,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:42:29,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-03 19:42:29,021 INFO L175 Difference]: Start difference. First operand has 400 places, 582 transitions, 7677 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:42:29,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 600 transitions, 9503 flow [2024-06-03 19:42:34,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 600 transitions, 9135 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-03 19:42:34,882 INFO L231 Difference]: Finished difference. Result has 404 places, 588 transitions, 7849 flow [2024-06-03 19:42:34,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7309, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7849, PETRI_PLACES=404, PETRI_TRANSITIONS=588} [2024-06-03 19:42:34,883 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 358 predicate places. [2024-06-03 19:42:34,883 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 588 transitions, 7849 flow [2024-06-03 19:42:34,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:34,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:34,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:34,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 19:42:34,884 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:34,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:34,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1292544468, now seen corresponding path program 9 times [2024-06-03 19:42:34,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:34,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276324947] [2024-06-03 19:42:34,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:34,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:35,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:35,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276324947] [2024-06-03 19:42:35,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276324947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:35,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:35,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:35,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593555842] [2024-06-03 19:42:35,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:35,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:35,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:35,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:35,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:35,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:42:35,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 588 transitions, 7849 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:35,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:35,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:42:35,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:37,874 INFO L124 PetriNetUnfolderBase]: 4319/6970 cut-off events. [2024-06-03 19:42:37,874 INFO L125 PetriNetUnfolderBase]: For 2233978/2233981 co-relation queries the response was YES. [2024-06-03 19:42:37,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80963 conditions, 6970 events. 4319/6970 cut-off events. For 2233978/2233981 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 44091 event pairs, 882 based on Foata normal form. 3/6908 useless extension candidates. Maximal degree in co-relation 80765. Up to 5928 conditions per place. [2024-06-03 19:42:37,998 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 351 selfloop transitions, 211 changer transitions 0/603 dead transitions. [2024-06-03 19:42:37,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 603 transitions, 9613 flow [2024-06-03 19:42:37,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:37,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:37,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:42:38,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-03 19:42:38,000 INFO L175 Difference]: Start difference. First operand has 404 places, 588 transitions, 7849 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:42:38,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 603 transitions, 9613 flow [2024-06-03 19:42:42,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 603 transitions, 9246 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-03 19:42:42,663 INFO L231 Difference]: Finished difference. Result has 408 places, 591 transitions, 7988 flow [2024-06-03 19:42:42,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7484, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7988, PETRI_PLACES=408, PETRI_TRANSITIONS=591} [2024-06-03 19:42:42,663 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 362 predicate places. [2024-06-03 19:42:42,663 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 591 transitions, 7988 flow [2024-06-03 19:42:42,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:42,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:42,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:42,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 19:42:42,664 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:42,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:42,665 INFO L85 PathProgramCache]: Analyzing trace with hash -541114454, now seen corresponding path program 11 times [2024-06-03 19:42:42,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:42,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573583073] [2024-06-03 19:42:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:42,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:43,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:43,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573583073] [2024-06-03 19:42:43,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573583073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:43,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:43,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:43,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925137901] [2024-06-03 19:42:43,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:43,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:43,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:43,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:43,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:43,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:42:43,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 591 transitions, 7988 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:43,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:43,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:42:43,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:45,584 INFO L124 PetriNetUnfolderBase]: 4398/7092 cut-off events. [2024-06-03 19:42:45,584 INFO L125 PetriNetUnfolderBase]: For 2275799/2275802 co-relation queries the response was YES. [2024-06-03 19:42:45,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82096 conditions, 7092 events. 4398/7092 cut-off events. For 2275799/2275802 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 44779 event pairs, 921 based on Foata normal form. 1/7073 useless extension candidates. Maximal degree in co-relation 81897. Up to 6009 conditions per place. [2024-06-03 19:42:45,703 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 417 selfloop transitions, 140 changer transitions 0/609 dead transitions. [2024-06-03 19:42:45,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 609 transitions, 9912 flow [2024-06-03 19:42:45,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:45,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:42:45,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-03 19:42:45,705 INFO L175 Difference]: Start difference. First operand has 408 places, 591 transitions, 7988 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:42:45,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 609 transitions, 9912 flow [2024-06-03 19:42:50,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 609 transitions, 9514 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-03 19:42:50,433 INFO L231 Difference]: Finished difference. Result has 411 places, 597 transitions, 8122 flow [2024-06-03 19:42:50,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7590, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8122, PETRI_PLACES=411, PETRI_TRANSITIONS=597} [2024-06-03 19:42:50,434 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 365 predicate places. [2024-06-03 19:42:50,434 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 597 transitions, 8122 flow [2024-06-03 19:42:50,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:50,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:50,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:50,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 19:42:50,435 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:50,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:50,435 INFO L85 PathProgramCache]: Analyzing trace with hash -717078834, now seen corresponding path program 10 times [2024-06-03 19:42:50,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:50,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714049563] [2024-06-03 19:42:50,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:50,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:51,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:51,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714049563] [2024-06-03 19:42:51,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714049563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:51,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:51,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:51,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061398563] [2024-06-03 19:42:51,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:51,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:51,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:51,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:51,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:51,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:42:51,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 597 transitions, 8122 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:51,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:51,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:42:51,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:53,345 INFO L124 PetriNetUnfolderBase]: 4319/6969 cut-off events. [2024-06-03 19:42:53,345 INFO L125 PetriNetUnfolderBase]: For 2291150/2291153 co-relation queries the response was YES. [2024-06-03 19:42:53,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81306 conditions, 6969 events. 4319/6969 cut-off events. For 2291150/2291153 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 44117 event pairs, 882 based on Foata normal form. 3/6907 useless extension candidates. Maximal degree in co-relation 81107. Up to 5928 conditions per place. [2024-06-03 19:42:53,470 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 355 selfloop transitions, 211 changer transitions 0/609 dead transitions. [2024-06-03 19:42:53,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 609 transitions, 9824 flow [2024-06-03 19:42:53,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:42:53,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:42:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:42:53,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-03 19:42:53,472 INFO L175 Difference]: Start difference. First operand has 411 places, 597 transitions, 8122 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:42:53,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 609 transitions, 9824 flow [2024-06-03 19:42:59,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 609 transitions, 9569 flow, removed 90 selfloop flow, removed 3 redundant places. [2024-06-03 19:42:59,258 INFO L231 Difference]: Finished difference. Result has 417 places, 597 transitions, 8295 flow [2024-06-03 19:42:59,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7867, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8295, PETRI_PLACES=417, PETRI_TRANSITIONS=597} [2024-06-03 19:42:59,259 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 371 predicate places. [2024-06-03 19:42:59,259 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 597 transitions, 8295 flow [2024-06-03 19:42:59,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:59,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:59,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:59,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 19:42:59,259 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:59,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:59,260 INFO L85 PathProgramCache]: Analyzing trace with hash -532595406, now seen corresponding path program 11 times [2024-06-03 19:42:59,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:59,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323780715] [2024-06-03 19:42:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:59,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:00,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:00,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323780715] [2024-06-03 19:43:00,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323780715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:00,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:00,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:00,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139629068] [2024-06-03 19:43:00,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:00,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:00,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:00,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:00,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:00,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:43:00,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 597 transitions, 8295 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:00,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:00,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:43:00,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:02,036 INFO L124 PetriNetUnfolderBase]: 4316/6965 cut-off events. [2024-06-03 19:43:02,036 INFO L125 PetriNetUnfolderBase]: For 2313229/2313232 co-relation queries the response was YES. [2024-06-03 19:43:02,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81807 conditions, 6965 events. 4316/6965 cut-off events. For 2313229/2313232 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 44083 event pairs, 882 based on Foata normal form. 3/6903 useless extension candidates. Maximal degree in co-relation 81606. Up to 5926 conditions per place. [2024-06-03 19:43:02,177 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 355 selfloop transitions, 210 changer transitions 0/608 dead transitions. [2024-06-03 19:43:02,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 608 transitions, 9725 flow [2024-06-03 19:43:02,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:02,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 19:43:02,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-03 19:43:02,178 INFO L175 Difference]: Start difference. First operand has 417 places, 597 transitions, 8295 flow. Second operand 8 states and 156 transitions. [2024-06-03 19:43:02,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 608 transitions, 9725 flow [2024-06-03 19:43:06,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 608 transitions, 9085 flow, removed 23 selfloop flow, removed 12 redundant places. [2024-06-03 19:43:06,845 INFO L231 Difference]: Finished difference. Result has 413 places, 597 transitions, 8081 flow [2024-06-03 19:43:06,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7655, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8081, PETRI_PLACES=413, PETRI_TRANSITIONS=597} [2024-06-03 19:43:06,845 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 367 predicate places. [2024-06-03 19:43:06,846 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 597 transitions, 8081 flow [2024-06-03 19:43:06,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:06,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:06,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:06,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 19:43:06,846 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:06,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:06,846 INFO L85 PathProgramCache]: Analyzing trace with hash -437217654, now seen corresponding path program 12 times [2024-06-03 19:43:06,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:06,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400159505] [2024-06-03 19:43:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:06,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:07,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:07,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:07,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400159505] [2024-06-03 19:43:07,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400159505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:07,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:07,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:07,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685665035] [2024-06-03 19:43:07,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:07,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:07,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:07,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:07,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:07,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:43:07,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 597 transitions, 8081 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:07,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:07,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:43:07,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:09,632 INFO L124 PetriNetUnfolderBase]: 4308/6955 cut-off events. [2024-06-03 19:43:09,632 INFO L125 PetriNetUnfolderBase]: For 2333150/2333153 co-relation queries the response was YES. [2024-06-03 19:43:09,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81543 conditions, 6955 events. 4308/6955 cut-off events. For 2333150/2333153 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 44069 event pairs, 883 based on Foata normal form. 4/6894 useless extension candidates. Maximal degree in co-relation 81342. Up to 5918 conditions per place. [2024-06-03 19:43:09,760 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 369 selfloop transitions, 195 changer transitions 0/607 dead transitions. [2024-06-03 19:43:09,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 607 transitions, 9235 flow [2024-06-03 19:43:09,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:09,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:09,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 19:43:09,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-03 19:43:09,762 INFO L175 Difference]: Start difference. First operand has 413 places, 597 transitions, 8081 flow. Second operand 8 states and 156 transitions. [2024-06-03 19:43:09,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 607 transitions, 9235 flow [2024-06-03 19:43:14,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 607 transitions, 8729 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-03 19:43:14,240 INFO L231 Difference]: Finished difference. Result has 414 places, 597 transitions, 7973 flow [2024-06-03 19:43:14,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7575, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7973, PETRI_PLACES=414, PETRI_TRANSITIONS=597} [2024-06-03 19:43:14,241 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 368 predicate places. [2024-06-03 19:43:14,241 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 597 transitions, 7973 flow [2024-06-03 19:43:14,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:14,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:14,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:14,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 19:43:14,241 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:14,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:14,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1292306140, now seen corresponding path program 12 times [2024-06-03 19:43:14,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:14,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730771489] [2024-06-03 19:43:14,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:14,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:15,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:15,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730771489] [2024-06-03 19:43:15,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730771489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:15,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:15,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:15,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144221636] [2024-06-03 19:43:15,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:15,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:15,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:15,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:15,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:15,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:43:15,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 597 transitions, 7973 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:15,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:15,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:43:15,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:16,989 INFO L124 PetriNetUnfolderBase]: 4379/7064 cut-off events. [2024-06-03 19:43:16,990 INFO L125 PetriNetUnfolderBase]: For 2358252/2358255 co-relation queries the response was YES. [2024-06-03 19:43:17,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82217 conditions, 7064 events. 4379/7064 cut-off events. For 2358252/2358255 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 44619 event pairs, 921 based on Foata normal form. 1/7045 useless extension candidates. Maximal degree in co-relation 82015. Up to 5991 conditions per place. [2024-06-03 19:43:17,121 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 412 selfloop transitions, 144 changer transitions 0/608 dead transitions. [2024-06-03 19:43:17,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 608 transitions, 9389 flow [2024-06-03 19:43:17,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:17,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:17,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 19:43:17,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-03 19:43:17,122 INFO L175 Difference]: Start difference. First operand has 414 places, 597 transitions, 7973 flow. Second operand 8 states and 157 transitions. [2024-06-03 19:43:17,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 608 transitions, 9389 flow [2024-06-03 19:43:22,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 608 transitions, 8838 flow, removed 45 selfloop flow, removed 9 redundant places. [2024-06-03 19:43:22,557 INFO L231 Difference]: Finished difference. Result has 413 places, 597 transitions, 7716 flow [2024-06-03 19:43:22,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7422, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7716, PETRI_PLACES=413, PETRI_TRANSITIONS=597} [2024-06-03 19:43:22,558 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 367 predicate places. [2024-06-03 19:43:22,558 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 597 transitions, 7716 flow [2024-06-03 19:43:22,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:22,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:22,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:22,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 19:43:22,559 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:22,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:22,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1986356207, now seen corresponding path program 2 times [2024-06-03 19:43:22,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:22,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516541822] [2024-06-03 19:43:22,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:22,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:23,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:23,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:23,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516541822] [2024-06-03 19:43:23,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516541822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:23,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:23,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:43:23,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434401969] [2024-06-03 19:43:23,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:23,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:43:23,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:23,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:43:23,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:43:24,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:43:24,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 597 transitions, 7716 flow. Second operand has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:24,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:24,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:43:24,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:26,192 INFO L124 PetriNetUnfolderBase]: 4503/7297 cut-off events. [2024-06-03 19:43:26,192 INFO L125 PetriNetUnfolderBase]: For 2449648/2449651 co-relation queries the response was YES. [2024-06-03 19:43:26,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83308 conditions, 7297 events. 4503/7297 cut-off events. For 2449648/2449651 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 46604 event pairs, 899 based on Foata normal form. 14/7294 useless extension candidates. Maximal degree in co-relation 83105. Up to 5939 conditions per place. [2024-06-03 19:43:26,318 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 490 selfloop transitions, 101 changer transitions 0/643 dead transitions. [2024-06-03 19:43:26,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 643 transitions, 9182 flow [2024-06-03 19:43:26,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:43:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:43:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-03 19:43:26,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46444444444444444 [2024-06-03 19:43:26,320 INFO L175 Difference]: Start difference. First operand has 413 places, 597 transitions, 7716 flow. Second operand 10 states and 209 transitions. [2024-06-03 19:43:26,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 643 transitions, 9182 flow [2024-06-03 19:43:32,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 643 transitions, 8886 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:43:32,017 INFO L231 Difference]: Finished difference. Result has 418 places, 605 transitions, 7768 flow [2024-06-03 19:43:32,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7420, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7768, PETRI_PLACES=418, PETRI_TRANSITIONS=605} [2024-06-03 19:43:32,018 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 372 predicate places. [2024-06-03 19:43:32,018 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 605 transitions, 7768 flow [2024-06-03 19:43:32,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:32,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:32,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:32,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 19:43:32,018 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:32,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:32,019 INFO L85 PathProgramCache]: Analyzing trace with hash -376595473, now seen corresponding path program 3 times [2024-06-03 19:43:32,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:32,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336749131] [2024-06-03 19:43:32,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:32,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:33,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:33,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336749131] [2024-06-03 19:43:33,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336749131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:33,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:33,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:43:33,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853576702] [2024-06-03 19:43:33,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:33,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:43:33,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:33,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:43:33,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:43:33,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:43:33,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 605 transitions, 7768 flow. Second operand has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:33,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:33,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:43:33,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:36,149 INFO L124 PetriNetUnfolderBase]: 4615/7501 cut-off events. [2024-06-03 19:43:36,150 INFO L125 PetriNetUnfolderBase]: For 2487746/2487749 co-relation queries the response was YES. [2024-06-03 19:43:36,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85133 conditions, 7501 events. 4615/7501 cut-off events. For 2487746/2487749 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 48496 event pairs, 925 based on Foata normal form. 14/7498 useless extension candidates. Maximal degree in co-relation 84927. Up to 6214 conditions per place. [2024-06-03 19:43:36,402 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 484 selfloop transitions, 114 changer transitions 0/650 dead transitions. [2024-06-03 19:43:36,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 650 transitions, 9250 flow [2024-06-03 19:43:36,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:43:36,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:43:36,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-03 19:43:36,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-03 19:43:36,404 INFO L175 Difference]: Start difference. First operand has 418 places, 605 transitions, 7768 flow. Second operand 10 states and 207 transitions. [2024-06-03 19:43:36,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 650 transitions, 9250 flow [2024-06-03 19:43:41,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 650 transitions, 9032 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 19:43:41,701 INFO L231 Difference]: Finished difference. Result has 425 places, 613 transitions, 7951 flow [2024-06-03 19:43:41,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7560, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7951, PETRI_PLACES=425, PETRI_TRANSITIONS=613} [2024-06-03 19:43:41,702 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 379 predicate places. [2024-06-03 19:43:41,702 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 613 transitions, 7951 flow [2024-06-03 19:43:41,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:41,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:41,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:41,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 19:43:41,703 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:41,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:41,703 INFO L85 PathProgramCache]: Analyzing trace with hash 334029723, now seen corresponding path program 4 times [2024-06-03 19:43:41,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:41,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211358092] [2024-06-03 19:43:41,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:41,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:43,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:43,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211358092] [2024-06-03 19:43:43,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211358092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:43,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:43,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:43:43,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105417859] [2024-06-03 19:43:43,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:43,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:43:43,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:43,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:43:43,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:43:43,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:43:43,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 613 transitions, 7951 flow. Second operand has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:43,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:43,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:43:43,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:45,917 INFO L124 PetriNetUnfolderBase]: 4636/7550 cut-off events. [2024-06-03 19:43:45,917 INFO L125 PetriNetUnfolderBase]: For 2454620/2454623 co-relation queries the response was YES. [2024-06-03 19:43:46,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84669 conditions, 7550 events. 4636/7550 cut-off events. For 2454620/2454623 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 48903 event pairs, 784 based on Foata normal form. 14/7547 useless extension candidates. Maximal degree in co-relation 84460. Up to 5184 conditions per place. [2024-06-03 19:43:46,155 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 471 selfloop transitions, 130 changer transitions 0/653 dead transitions. [2024-06-03 19:43:46,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 653 transitions, 9620 flow [2024-06-03 19:43:46,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:43:46,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:43:46,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-03 19:43:46,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622222222222222 [2024-06-03 19:43:46,157 INFO L175 Difference]: Start difference. First operand has 425 places, 613 transitions, 7951 flow. Second operand 10 states and 208 transitions. [2024-06-03 19:43:46,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 653 transitions, 9620 flow [2024-06-03 19:43:50,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 653 transitions, 9435 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-03 19:43:50,759 INFO L231 Difference]: Finished difference. Result has 432 places, 614 transitions, 8090 flow [2024-06-03 19:43:50,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7766, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8090, PETRI_PLACES=432, PETRI_TRANSITIONS=614} [2024-06-03 19:43:50,760 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 386 predicate places. [2024-06-03 19:43:50,760 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 614 transitions, 8090 flow [2024-06-03 19:43:50,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:50,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:50,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:50,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 19:43:50,761 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:50,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:50,761 INFO L85 PathProgramCache]: Analyzing trace with hash -624756851, now seen corresponding path program 5 times [2024-06-03 19:43:50,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:50,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083890014] [2024-06-03 19:43:50,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:50,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:52,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:52,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083890014] [2024-06-03 19:43:52,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083890014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:52,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:52,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:43:52,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996484060] [2024-06-03 19:43:52,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:52,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:43:52,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:52,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:43:52,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:43:52,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:43:52,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 614 transitions, 8090 flow. Second operand has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:52,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:52,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:43:52,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:54,836 INFO L124 PetriNetUnfolderBase]: 4616/7518 cut-off events. [2024-06-03 19:43:54,836 INFO L125 PetriNetUnfolderBase]: For 2416046/2416049 co-relation queries the response was YES. [2024-06-03 19:43:55,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83081 conditions, 7518 events. 4616/7518 cut-off events. For 2416046/2416049 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 48755 event pairs, 912 based on Foata normal form. 14/7515 useless extension candidates. Maximal degree in co-relation 82870. Up to 6221 conditions per place. [2024-06-03 19:43:55,071 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 489 selfloop transitions, 109 changer transitions 0/650 dead transitions. [2024-06-03 19:43:55,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 650 transitions, 9332 flow [2024-06-03 19:43:55,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:43:55,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:43:55,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-03 19:43:55,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-03 19:43:55,072 INFO L175 Difference]: Start difference. First operand has 432 places, 614 transitions, 8090 flow. Second operand 10 states and 207 transitions. [2024-06-03 19:43:55,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 650 transitions, 9332 flow [2024-06-03 19:44:00,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 650 transitions, 8986 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-03 19:44:00,545 INFO L231 Difference]: Finished difference. Result has 433 places, 613 transitions, 7848 flow [2024-06-03 19:44:00,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7626, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7848, PETRI_PLACES=433, PETRI_TRANSITIONS=613} [2024-06-03 19:44:00,546 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 387 predicate places. [2024-06-03 19:44:00,546 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 613 transitions, 7848 flow [2024-06-03 19:44:00,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:00,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:00,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:00,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 19:44:00,546 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:00,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:00,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1114814338, now seen corresponding path program 4 times [2024-06-03 19:44:00,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:00,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611043611] [2024-06-03 19:44:00,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:00,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:01,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:01,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611043611] [2024-06-03 19:44:01,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611043611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:01,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:01,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:01,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005442539] [2024-06-03 19:44:01,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:01,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:01,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:01,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:01,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:01,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-03 19:44:01,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 613 transitions, 7848 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:44:01,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:01,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-03 19:44:01,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:03,848 INFO L124 PetriNetUnfolderBase]: 4466/7336 cut-off events. [2024-06-03 19:44:03,848 INFO L125 PetriNetUnfolderBase]: For 2417350/2417353 co-relation queries the response was YES. [2024-06-03 19:44:03,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81566 conditions, 7336 events. 4466/7336 cut-off events. For 2417350/2417353 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 48211 event pairs, 894 based on Foata normal form. 6/7277 useless extension candidates. Maximal degree in co-relation 81355. Up to 6253 conditions per place. [2024-06-03 19:44:03,969 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 436 selfloop transitions, 101 changer transitions 0/627 dead transitions. [2024-06-03 19:44:03,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 627 transitions, 9100 flow [2024-06-03 19:44:03,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:03,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:03,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-03 19:44:03,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:44:03,970 INFO L175 Difference]: Start difference. First operand has 433 places, 613 transitions, 7848 flow. Second operand 8 states and 160 transitions. [2024-06-03 19:44:03,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 627 transitions, 9100 flow [2024-06-03 19:44:09,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 627 transitions, 8615 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-03 19:44:09,435 INFO L231 Difference]: Finished difference. Result has 429 places, 616 transitions, 7727 flow [2024-06-03 19:44:09,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7363, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7727, PETRI_PLACES=429, PETRI_TRANSITIONS=616} [2024-06-03 19:44:09,448 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 383 predicate places. [2024-06-03 19:44:09,449 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 616 transitions, 7727 flow [2024-06-03 19:44:09,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 19:44:09,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:09,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:09,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 19:44:09,449 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:09,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:09,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1115245300, now seen corresponding path program 2 times [2024-06-03 19:44:09,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:09,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742406815] [2024-06-03 19:44:09,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:09,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:10,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:10,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742406815] [2024-06-03 19:44:10,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742406815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:10,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:10,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:10,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051273231] [2024-06-03 19:44:10,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:10,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:10,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:10,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:10,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:10,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:44:10,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 616 transitions, 7727 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:10,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:10,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:44:10,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:12,943 INFO L124 PetriNetUnfolderBase]: 4560/7432 cut-off events. [2024-06-03 19:44:12,944 INFO L125 PetriNetUnfolderBase]: For 2412437/2412446 co-relation queries the response was YES. [2024-06-03 19:44:13,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81435 conditions, 7432 events. 4560/7432 cut-off events. For 2412437/2412446 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 48325 event pairs, 878 based on Foata normal form. 7/7383 useless extension candidates. Maximal degree in co-relation 81227. Up to 6781 conditions per place. [2024-06-03 19:44:13,081 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 538 selfloop transitions, 54 changer transitions 0/635 dead transitions. [2024-06-03 19:44:13,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 635 transitions, 9502 flow [2024-06-03 19:44:13,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:44:13,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:44:13,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:44:13,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4123456790123457 [2024-06-03 19:44:13,082 INFO L175 Difference]: Start difference. First operand has 429 places, 616 transitions, 7727 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:44:13,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 635 transitions, 9502 flow [2024-06-03 19:44:17,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 635 transitions, 9160 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-03 19:44:17,802 INFO L231 Difference]: Finished difference. Result has 432 places, 622 transitions, 7773 flow [2024-06-03 19:44:17,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7385, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7773, PETRI_PLACES=432, PETRI_TRANSITIONS=622} [2024-06-03 19:44:17,803 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 386 predicate places. [2024-06-03 19:44:17,803 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 622 transitions, 7773 flow [2024-06-03 19:44:17,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:17,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:17,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:17,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 19:44:17,803 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:17,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:17,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1115244804, now seen corresponding path program 5 times [2024-06-03 19:44:17,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:17,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042306535] [2024-06-03 19:44:17,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:17,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:18,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:18,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042306535] [2024-06-03 19:44:18,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042306535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:18,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:18,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:18,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35614156] [2024-06-03 19:44:18,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:18,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:18,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:18,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:18,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:18,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:44:18,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 622 transitions, 7773 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:18,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:18,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:44:18,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:21,091 INFO L124 PetriNetUnfolderBase]: 4596/7487 cut-off events. [2024-06-03 19:44:21,091 INFO L125 PetriNetUnfolderBase]: For 2485889/2485892 co-relation queries the response was YES. [2024-06-03 19:44:21,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82548 conditions, 7487 events. 4596/7487 cut-off events. For 2485889/2485892 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 48761 event pairs, 920 based on Foata normal form. 4/7426 useless extension candidates. Maximal degree in co-relation 82339. Up to 6180 conditions per place. [2024-06-03 19:44:21,219 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 433 selfloop transitions, 184 changer transitions 0/660 dead transitions. [2024-06-03 19:44:21,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 660 transitions, 10585 flow [2024-06-03 19:44:21,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:44:21,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:44:21,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-03 19:44:21,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43950617283950616 [2024-06-03 19:44:21,220 INFO L175 Difference]: Start difference. First operand has 432 places, 622 transitions, 7773 flow. Second operand 9 states and 178 transitions. [2024-06-03 19:44:21,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 660 transitions, 10585 flow [2024-06-03 19:44:26,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 660 transitions, 10395 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-03 19:44:26,570 INFO L231 Difference]: Finished difference. Result has 438 places, 642 transitions, 8521 flow [2024-06-03 19:44:26,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7583, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8521, PETRI_PLACES=438, PETRI_TRANSITIONS=642} [2024-06-03 19:44:26,574 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 392 predicate places. [2024-06-03 19:44:26,574 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 642 transitions, 8521 flow [2024-06-03 19:44:26,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:26,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:26,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:26,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 19:44:26,575 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:26,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:26,580 INFO L85 PathProgramCache]: Analyzing trace with hash -421536242, now seen corresponding path program 3 times [2024-06-03 19:44:26,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:26,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201698926] [2024-06-03 19:44:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:26,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:27,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:27,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201698926] [2024-06-03 19:44:27,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201698926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:27,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:27,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:27,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147355177] [2024-06-03 19:44:27,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:27,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:27,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:27,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:27,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:27,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:44:27,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 642 transitions, 8521 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:27,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:27,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:44:27,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:30,025 INFO L124 PetriNetUnfolderBase]: 4601/7491 cut-off events. [2024-06-03 19:44:30,025 INFO L125 PetriNetUnfolderBase]: For 2523703/2523703 co-relation queries the response was YES. [2024-06-03 19:44:30,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84339 conditions, 7491 events. 4601/7491 cut-off events. For 2523703/2523703 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 48843 event pairs, 962 based on Foata normal form. 1/7441 useless extension candidates. Maximal degree in co-relation 84126. Up to 6914 conditions per place. [2024-06-03 19:44:30,173 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 592 selfloop transitions, 21 changer transitions 0/656 dead transitions. [2024-06-03 19:44:30,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 656 transitions, 9899 flow [2024-06-03 19:44:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:44:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:44:30,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 19:44:30,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39012345679012345 [2024-06-03 19:44:30,174 INFO L175 Difference]: Start difference. First operand has 438 places, 642 transitions, 8521 flow. Second operand 9 states and 158 transitions. [2024-06-03 19:44:30,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 656 transitions, 9899 flow [2024-06-03 19:44:36,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 656 transitions, 9637 flow, removed 104 selfloop flow, removed 3 redundant places. [2024-06-03 19:44:36,704 INFO L231 Difference]: Finished difference. Result has 444 places, 645 transitions, 8437 flow [2024-06-03 19:44:36,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8259, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8437, PETRI_PLACES=444, PETRI_TRANSITIONS=645} [2024-06-03 19:44:36,704 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 398 predicate places. [2024-06-03 19:44:36,704 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 645 transitions, 8437 flow [2024-06-03 19:44:36,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:36,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:36,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:36,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 19:44:36,705 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:36,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:36,705 INFO L85 PathProgramCache]: Analyzing trace with hash -893917218, now seen corresponding path program 6 times [2024-06-03 19:44:36,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:36,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422675761] [2024-06-03 19:44:36,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:36,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:37,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:37,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422675761] [2024-06-03 19:44:37,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422675761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:37,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:37,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:37,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177314618] [2024-06-03 19:44:37,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:37,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:37,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:37,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:37,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:37,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:44:37,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 645 transitions, 8437 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:37,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:37,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:44:37,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:40,189 INFO L124 PetriNetUnfolderBase]: 4611/7506 cut-off events. [2024-06-03 19:44:40,190 INFO L125 PetriNetUnfolderBase]: For 2559698/2559701 co-relation queries the response was YES. [2024-06-03 19:44:40,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83992 conditions, 7506 events. 4611/7506 cut-off events. For 2559698/2559701 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 48838 event pairs, 919 based on Foata normal form. 4/7445 useless extension candidates. Maximal degree in co-relation 83777. Up to 6197 conditions per place. [2024-06-03 19:44:40,330 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 436 selfloop transitions, 188 changer transitions 0/667 dead transitions. [2024-06-03 19:44:40,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 667 transitions, 11004 flow [2024-06-03 19:44:40,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:44:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:44:40,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-03 19:44:40,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4419753086419753 [2024-06-03 19:44:40,331 INFO L175 Difference]: Start difference. First operand has 444 places, 645 transitions, 8437 flow. Second operand 9 states and 179 transitions. [2024-06-03 19:44:40,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 667 transitions, 11004 flow [2024-06-03 19:44:46,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 667 transitions, 10854 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-03 19:44:46,943 INFO L231 Difference]: Finished difference. Result has 446 places, 649 transitions, 8799 flow [2024-06-03 19:44:46,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8287, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8799, PETRI_PLACES=446, PETRI_TRANSITIONS=649} [2024-06-03 19:44:46,945 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 400 predicate places. [2024-06-03 19:44:46,945 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 649 transitions, 8799 flow [2024-06-03 19:44:46,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:46,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:46,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:46,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 19:44:46,945 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:46,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:46,946 INFO L85 PathProgramCache]: Analyzing trace with hash -894320838, now seen corresponding path program 7 times [2024-06-03 19:44:46,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:46,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467764199] [2024-06-03 19:44:46,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:46,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:46,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:47,973 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 19:44:47,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:47,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467764199] [2024-06-03 19:44:47,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467764199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:47,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:47,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:47,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273013040] [2024-06-03 19:44:47,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:47,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:47,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:47,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:47,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:48,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:44:48,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 649 transitions, 8799 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:48,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:48,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:44:48,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:50,358 INFO L124 PetriNetUnfolderBase]: 4621/7520 cut-off events. [2024-06-03 19:44:50,358 INFO L125 PetriNetUnfolderBase]: For 2592311/2592314 co-relation queries the response was YES. [2024-06-03 19:44:50,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84898 conditions, 7520 events. 4621/7520 cut-off events. For 2592311/2592314 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 48954 event pairs, 919 based on Foata normal form. 4/7459 useless extension candidates. Maximal degree in co-relation 84682. Up to 6210 conditions per place. [2024-06-03 19:44:50,494 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 423 selfloop transitions, 207 changer transitions 0/673 dead transitions. [2024-06-03 19:44:50,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 673 transitions, 11392 flow [2024-06-03 19:44:50,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:44:50,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:44:50,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-03 19:44:50,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43950617283950616 [2024-06-03 19:44:50,495 INFO L175 Difference]: Start difference. First operand has 446 places, 649 transitions, 8799 flow. Second operand 9 states and 178 transitions. [2024-06-03 19:44:50,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 673 transitions, 11392 flow [2024-06-03 19:44:57,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 673 transitions, 10929 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-03 19:44:57,021 INFO L231 Difference]: Finished difference. Result has 451 places, 658 transitions, 9204 flow [2024-06-03 19:44:57,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8345, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9204, PETRI_PLACES=451, PETRI_TRANSITIONS=658} [2024-06-03 19:44:57,022 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 405 predicate places. [2024-06-03 19:44:57,022 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 658 transitions, 9204 flow [2024-06-03 19:44:57,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:57,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:57,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:57,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 19:44:57,023 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:57,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:57,023 INFO L85 PathProgramCache]: Analyzing trace with hash -421552548, now seen corresponding path program 8 times [2024-06-03 19:44:57,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:57,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301167463] [2024-06-03 19:44:57,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:57,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:57,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:58,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:58,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301167463] [2024-06-03 19:44:58,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301167463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:58,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:58,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:44:58,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523326990] [2024-06-03 19:44:58,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:58,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:44:58,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:58,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:44:58,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:44:58,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:44:58,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 658 transitions, 9204 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:58,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:58,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:44:58,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:00,675 INFO L124 PetriNetUnfolderBase]: 4649/7562 cut-off events. [2024-06-03 19:45:00,675 INFO L125 PetriNetUnfolderBase]: For 2653266/2653269 co-relation queries the response was YES. [2024-06-03 19:45:00,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86376 conditions, 7562 events. 4649/7562 cut-off events. For 2653266/2653269 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 49239 event pairs, 914 based on Foata normal form. 4/7501 useless extension candidates. Maximal degree in co-relation 86157. Up to 6238 conditions per place. [2024-06-03 19:45:00,809 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 389 selfloop transitions, 248 changer transitions 0/680 dead transitions. [2024-06-03 19:45:00,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 680 transitions, 11468 flow [2024-06-03 19:45:00,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:45:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:45:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-03 19:45:00,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-03 19:45:00,811 INFO L175 Difference]: Start difference. First operand has 451 places, 658 transitions, 9204 flow. Second operand 10 states and 189 transitions. [2024-06-03 19:45:00,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 680 transitions, 11468 flow [2024-06-03 19:45:07,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 680 transitions, 11009 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:07,657 INFO L231 Difference]: Finished difference. Result has 457 places, 666 transitions, 9549 flow [2024-06-03 19:45:07,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8769, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9549, PETRI_PLACES=457, PETRI_TRANSITIONS=666} [2024-06-03 19:45:07,664 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 411 predicate places. [2024-06-03 19:45:07,664 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 666 transitions, 9549 flow [2024-06-03 19:45:07,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:07,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:07,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:07,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 19:45:07,665 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:07,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:07,665 INFO L85 PathProgramCache]: Analyzing trace with hash -437221188, now seen corresponding path program 9 times [2024-06-03 19:45:07,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:07,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822720240] [2024-06-03 19:45:07,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:07,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:08,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:08,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822720240] [2024-06-03 19:45:08,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822720240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:08,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:08,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:08,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797863814] [2024-06-03 19:45:08,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:08,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:08,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:08,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:08,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:08,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:45:08,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 666 transitions, 9549 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:08,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:08,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:45:08,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:11,234 INFO L124 PetriNetUnfolderBase]: 4659/7580 cut-off events. [2024-06-03 19:45:11,234 INFO L125 PetriNetUnfolderBase]: For 2683832/2683835 co-relation queries the response was YES. [2024-06-03 19:45:11,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86892 conditions, 7580 events. 4659/7580 cut-off events. For 2683832/2683835 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 49417 event pairs, 919 based on Foata normal form. 4/7519 useless extension candidates. Maximal degree in co-relation 86671. Up to 6248 conditions per place. [2024-06-03 19:45:11,368 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 419 selfloop transitions, 223 changer transitions 0/685 dead transitions. [2024-06-03 19:45:11,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 685 transitions, 11989 flow [2024-06-03 19:45:11,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:11,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:11,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-03 19:45:11,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2024-06-03 19:45:11,370 INFO L175 Difference]: Start difference. First operand has 457 places, 666 transitions, 9549 flow. Second operand 9 states and 177 transitions. [2024-06-03 19:45:11,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 685 transitions, 11989 flow [2024-06-03 19:45:18,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 685 transitions, 11427 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-03 19:45:18,022 INFO L231 Difference]: Finished difference. Result has 460 places, 670 transitions, 9586 flow [2024-06-03 19:45:18,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=9002, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9586, PETRI_PLACES=460, PETRI_TRANSITIONS=670} [2024-06-03 19:45:18,022 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 414 predicate places. [2024-06-03 19:45:18,022 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 670 transitions, 9586 flow [2024-06-03 19:45:18,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:18,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:18,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:18,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 19:45:18,023 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:18,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:18,023 INFO L85 PathProgramCache]: Analyzing trace with hash -421552052, now seen corresponding path program 4 times [2024-06-03 19:45:18,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:18,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435991010] [2024-06-03 19:45:18,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:18,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:19,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:19,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435991010] [2024-06-03 19:45:19,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435991010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:19,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:19,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:19,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873028054] [2024-06-03 19:45:19,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:19,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:19,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:19,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:19,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:19,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-03 19:45:19,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 670 transitions, 9586 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:19,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:19,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-03 19:45:19,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:21,517 INFO L124 PetriNetUnfolderBase]: 4664/7589 cut-off events. [2024-06-03 19:45:21,517 INFO L125 PetriNetUnfolderBase]: For 2708665/2708674 co-relation queries the response was YES. [2024-06-03 19:45:21,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86997 conditions, 7589 events. 4664/7589 cut-off events. For 2708665/2708674 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 49419 event pairs, 880 based on Foata normal form. 7/7540 useless extension candidates. Maximal degree in co-relation 86775. Up to 6924 conditions per place. [2024-06-03 19:45:21,803 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 576 selfloop transitions, 67 changer transitions 0/686 dead transitions. [2024-06-03 19:45:21,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 686 transitions, 11339 flow [2024-06-03 19:45:21,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:21,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:21,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:45:21,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-03 19:45:21,804 INFO L175 Difference]: Start difference. First operand has 460 places, 670 transitions, 9586 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:45:21,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 686 transitions, 11339 flow [2024-06-03 19:45:26,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 686 transitions, 10867 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-03 19:45:26,739 INFO L231 Difference]: Finished difference. Result has 463 places, 673 transitions, 9384 flow [2024-06-03 19:45:26,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=9114, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9384, PETRI_PLACES=463, PETRI_TRANSITIONS=673} [2024-06-03 19:45:26,740 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 417 predicate places. [2024-06-03 19:45:26,740 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 673 transitions, 9384 flow [2024-06-03 19:45:26,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:26,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:26,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:26,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 19:45:26,741 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:26,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:26,741 INFO L85 PathProgramCache]: Analyzing trace with hash -437207238, now seen corresponding path program 10 times [2024-06-03 19:45:26,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:26,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277930545] [2024-06-03 19:45:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:26,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat