./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix042.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix042.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/mix042.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix042.oepc.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-7724a2d-m [2024-06-28 03:28:46,133 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 03:28:46,211 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 03:28:46,217 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 03:28:46,218 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 03:28:46,247 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 03:28:46,248 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 03:28:46,248 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 03:28:46,248 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 03:28:46,253 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 03:28:46,254 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 03:28:46,254 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 03:28:46,255 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 03:28:46,256 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 03:28:46,256 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 03:28:46,256 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 03:28:46,256 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 03:28:46,257 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 03:28:46,257 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 03:28:46,257 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 03:28:46,258 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 03:28:46,258 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 03:28:46,258 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 03:28:46,259 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 03:28:46,259 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 03:28:46,259 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 03:28:46,259 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 03:28:46,259 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 03:28:46,260 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 03:28:46,260 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 03:28:46,261 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 03:28:46,261 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 03:28:46,261 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:28:46,261 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 03:28:46,262 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 03:28:46,262 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 03:28:46,262 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 03:28:46,262 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 03:28:46,262 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 03:28:46,262 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 03:28:46,263 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 03:28:46,263 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 03:28:46,263 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 03:28:46,263 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 03:28:46,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 03:28:46,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 03:28:46,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 03:28:46,437 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 03:28:46,437 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 03:28:46,438 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix042.oepc.i [2024-06-28 03:28:47,498 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 03:28:47,745 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 03:28:47,745 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix042.oepc.i [2024-06-28 03:28:47,761 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/872df102c/eea1ed81aec84662b525a31484838ae0/FLAG47d04f5a9 [2024-06-28 03:28:47,782 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/872df102c/eea1ed81aec84662b525a31484838ae0 [2024-06-28 03:28:47,784 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 03:28:47,785 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 03:28:47,785 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix042.oepc.yml/witness.yml [2024-06-28 03:28:47,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 03:28:47,934 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 03:28:47,935 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 03:28:47,935 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 03:28:47,939 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 03:28:47,939 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:28:47" (1/2) ... [2024-06-28 03:28:47,941 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44a93d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:28:47, skipping insertion in model container [2024-06-28 03:28:47,941 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:28:47" (1/2) ... [2024-06-28 03:28:47,942 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@267f1b93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:28:47, skipping insertion in model container [2024-06-28 03:28:47,942 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:28:47" (2/2) ... [2024-06-28 03:28:47,943 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44a93d3e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:28:47, skipping insertion in model container [2024-06-28 03:28:47,943 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:28:47" (2/2) ... [2024-06-28 03:28:47,943 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 03:28:48,023 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 03:28:48,024 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] (((((((((((((((((((! multithreaded || a$r_buff1_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (x == 0 || x == 1)) && (z == 0 || z == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-28 03:28:48,024 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((! multithreaded || a$r_buff1_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (x == 0 || x == 1)) && (z == 0 || z == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-28 03:28:48,025 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((! multithreaded || a$r_buff1_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (x == 0 || x == 1)) && (z == 0 || z == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-28 03:28:48,025 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 03:28:48,025 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-28 03:28:48,061 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 03:28:48,351 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:28:48,363 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 03:28:48,471 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:28:48,504 INFO L206 MainTranslator]: Completed translation [2024-06-28 03:28:48,505 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:28:48 WrapperNode [2024-06-28 03:28:48,505 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 03:28:48,506 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 03:28:48,506 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 03:28:48,506 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 03:28:48,524 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 28.06 03:28:48" (1/1) ... [2024-06-28 03:28:48,546 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 28.06 03:28:48" (1/1) ... [2024-06-28 03:28:48,570 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-28 03:28:48,570 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 03:28:48,571 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 03:28:48,571 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 03:28:48,571 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 03:28:48,580 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:28:48" (1/1) ... [2024-06-28 03:28:48,580 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:28:48" (1/1) ... [2024-06-28 03:28:48,583 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:28:48" (1/1) ... [2024-06-28 03:28:48,605 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]. [2024-06-28 03:28:48,605 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:28:48" (1/1) ... [2024-06-28 03:28:48,605 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:28:48" (1/1) ... [2024-06-28 03:28:48,613 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:28:48" (1/1) ... [2024-06-28 03:28:48,615 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:28:48" (1/1) ... [2024-06-28 03:28:48,616 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:28:48" (1/1) ... [2024-06-28 03:28:48,617 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:28:48" (1/1) ... [2024-06-28 03:28:48,620 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 03:28:48,621 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 03:28:48,621 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 03:28:48,621 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 03:28:48,621 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:28:48" (1/1) ... [2024-06-28 03:28:48,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:28:48,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 03:28:48,656 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) [2024-06-28 03:28:48,713 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 [2024-06-28 03:28:48,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 03:28:48,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 03:28:48,731 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 03:28:48,731 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 03:28:48,731 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 03:28:48,732 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 03:28:48,732 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 03:28:48,732 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 03:28:48,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 03:28:48,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 03:28:48,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 03:28:48,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 03:28:48,754 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 03:28:48,897 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 03:28:48,899 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 03:28:49,175 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 03:28:49,175 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 03:28:49,326 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 03:28:49,326 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 03:28:49,327 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:28:49 BoogieIcfgContainer [2024-06-28 03:28:49,327 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 03:28:49,329 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 03:28:49,329 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 03:28:49,331 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 03:28:49,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 03:28:47" (1/4) ... [2024-06-28 03:28:49,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16751874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:28:49, skipping insertion in model container [2024-06-28 03:28:49,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:28:47" (2/4) ... [2024-06-28 03:28:49,334 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16751874 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:28:49, skipping insertion in model container [2024-06-28 03:28:49,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:28:48" (3/4) ... [2024-06-28 03:28:49,334 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16751874 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:28:49, skipping insertion in model container [2024-06-28 03:28:49,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:28:49" (4/4) ... [2024-06-28 03:28:49,335 INFO L112 eAbstractionObserver]: Analyzing ICFG mix042.oepc.i [2024-06-28 03:28:49,347 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 03:28:49,348 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 03:28:49,348 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 03:28:49,426 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 03:28:49,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 03:28:49,494 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-28 03:28:49,495 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:28:49,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 03:28:49,497 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 03:28:49,500 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-28 03:28:49,511 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 03:28:49,517 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;@31e92a9f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 03:28:49,517 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 03:28:49,523 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 03:28:49,523 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 03:28:49,524 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:28:49,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:49,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 03:28:49,525 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)] === [2024-06-28 03:28:49,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:49,529 INFO L85 PathProgramCache]: Analyzing trace with hash 377005303, now seen corresponding path program 1 times [2024-06-28 03:28:49,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:49,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329906411] [2024-06-28 03:28:49,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:49,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:50,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:50,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329906411] [2024-06-28 03:28:50,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329906411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:50,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:50,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 03:28:50,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821294317] [2024-06-28 03:28:50,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:50,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 03:28:50,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:50,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 03:28:50,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 03:28:50,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 03:28:50,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:50,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:50,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 03:28:50,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:50,696 INFO L124 PetriNetUnfolderBase]: 1566/2396 cut-off events. [2024-06-28 03:28:50,697 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-28 03:28:50,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4807 conditions, 2396 events. 1566/2396 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11486 event pairs, 1097 based on Foata normal form. 1/2328 useless extension candidates. Maximal degree in co-relation 4795. Up to 2326 conditions per place. [2024-06-28 03:28:50,715 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-28 03:28:50,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 175 flow [2024-06-28 03:28:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 03:28:50,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 03:28:50,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-28 03:28:50,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-28 03:28:50,727 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 76 transitions. [2024-06-28 03:28:50,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 175 flow [2024-06-28 03:28:50,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 03:28:50,733 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-28 03:28:50,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-28 03:28:50,737 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-28 03:28:50,737 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-28 03:28:50,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:50,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:50,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:50,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 03:28:50,739 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)] === [2024-06-28 03:28:50,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:50,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1524958000, now seen corresponding path program 1 times [2024-06-28 03:28:50,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:50,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844438479] [2024-06-28 03:28:50,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:50,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:51,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:51,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844438479] [2024-06-28 03:28:51,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844438479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:51,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:51,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 03:28:51,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822733722] [2024-06-28 03:28:51,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:51,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 03:28:51,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:51,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 03:28:51,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 03:28:51,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 03:28:51,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:51,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:51,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 03:28:51,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:51,731 INFO L124 PetriNetUnfolderBase]: 1560/2387 cut-off events. [2024-06-28 03:28:51,731 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2024-06-28 03:28:51,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5403 conditions, 2387 events. 1560/2387 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11430 event pairs, 930 based on Foata normal form. 3/2354 useless extension candidates. Maximal degree in co-relation 5391. Up to 2302 conditions per place. [2024-06-28 03:28:51,743 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 40 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-28 03:28:51,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 242 flow [2024-06-28 03:28:51,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 03:28:51,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 03:28:51,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-28 03:28:51,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-28 03:28:51,747 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 98 transitions. [2024-06-28 03:28:51,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 242 flow [2024-06-28 03:28:51,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 03:28:51,749 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-28 03:28:51,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-28 03:28:51,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-28 03:28:51,750 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-28 03:28:51,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:51,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:51,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:51,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 03:28:51,754 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)] === [2024-06-28 03:28:51,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:51,754 INFO L85 PathProgramCache]: Analyzing trace with hash 900820239, now seen corresponding path program 1 times [2024-06-28 03:28:51,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:51,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721801348] [2024-06-28 03:28:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:51,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:52,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:52,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721801348] [2024-06-28 03:28:52,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721801348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:52,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:52,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:28:52,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534095416] [2024-06-28 03:28:52,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:52,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:28:52,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:52,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:28:52,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:28:52,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 03:28:52,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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) [2024-06-28 03:28:52,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:52,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 03:28:52,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:53,059 INFO L124 PetriNetUnfolderBase]: 1893/2870 cut-off events. [2024-06-28 03:28:53,059 INFO L125 PetriNetUnfolderBase]: For 1453/1453 co-relation queries the response was YES. [2024-06-28 03:28:53,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7157 conditions, 2870 events. 1893/2870 cut-off events. For 1453/1453 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13632 event pairs, 878 based on Foata normal form. 3/2830 useless extension candidates. Maximal degree in co-relation 7143. Up to 2753 conditions per place. [2024-06-28 03:28:53,070 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2024-06-28 03:28:53,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 376 flow [2024-06-28 03:28:53,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:28:53,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:28:53,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-28 03:28:53,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5436507936507936 [2024-06-28 03:28:53,072 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 137 transitions. [2024-06-28 03:28:53,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 376 flow [2024-06-28 03:28:53,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 356 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 03:28:53,075 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 196 flow [2024-06-28 03:28:53,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-28 03:28:53,075 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-28 03:28:53,075 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 196 flow [2024-06-28 03:28:53,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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) [2024-06-28 03:28:53,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:53,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:53,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 03:28:53,076 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)] === [2024-06-28 03:28:53,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:53,077 INFO L85 PathProgramCache]: Analyzing trace with hash -420998953, now seen corresponding path program 1 times [2024-06-28 03:28:53,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:53,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925161419] [2024-06-28 03:28:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:53,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:54,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:54,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925161419] [2024-06-28 03:28:54,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925161419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:54,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:54,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:28:54,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583279623] [2024-06-28 03:28:54,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:54,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:28:54,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:54,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:28:54,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:28:54,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 03:28:54,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:54,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:54,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 03:28:54,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:54,513 INFO L124 PetriNetUnfolderBase]: 1884/2855 cut-off events. [2024-06-28 03:28:54,514 INFO L125 PetriNetUnfolderBase]: For 2881/2881 co-relation queries the response was YES. [2024-06-28 03:28:54,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7926 conditions, 2855 events. 1884/2855 cut-off events. For 2881/2881 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13519 event pairs, 690 based on Foata normal form. 6/2818 useless extension candidates. Maximal degree in co-relation 7910. Up to 2708 conditions per place. [2024-06-28 03:28:54,528 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2024-06-28 03:28:54,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 79 transitions, 436 flow [2024-06-28 03:28:54,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:28:54,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:28:54,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-28 03:28:54,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-28 03:28:54,532 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 196 flow. Second operand 7 states and 154 transitions. [2024-06-28 03:28:54,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 79 transitions, 436 flow [2024-06-28 03:28:54,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 408 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 03:28:54,537 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 217 flow [2024-06-28 03:28:54,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=217, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-28 03:28:54,539 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-28 03:28:54,539 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 217 flow [2024-06-28 03:28:54,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:54,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:54,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:54,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 03:28:54,539 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)] === [2024-06-28 03:28:54,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:54,540 INFO L85 PathProgramCache]: Analyzing trace with hash -856809485, now seen corresponding path program 1 times [2024-06-28 03:28:54,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:54,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603380603] [2024-06-28 03:28:54,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:54,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:55,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:55,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603380603] [2024-06-28 03:28:55,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603380603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:55,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:55,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:28:55,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756376975] [2024-06-28 03:28:55,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:55,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:28:55,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:55,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:28:55,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:28:55,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:28:55,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:55,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:55,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:28:55,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:55,480 INFO L124 PetriNetUnfolderBase]: 1879/2860 cut-off events. [2024-06-28 03:28:55,481 INFO L125 PetriNetUnfolderBase]: For 4336/4336 co-relation queries the response was YES. [2024-06-28 03:28:55,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8416 conditions, 2860 events. 1879/2860 cut-off events. For 4336/4336 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13588 event pairs, 812 based on Foata normal form. 2/2825 useless extension candidates. Maximal degree in co-relation 8398. Up to 2767 conditions per place. [2024-06-28 03:28:55,494 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 48 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-28 03:28:55,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 373 flow [2024-06-28 03:28:55,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:28:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:28:55,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-28 03:28:55,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-28 03:28:55,495 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 217 flow. Second operand 5 states and 92 transitions. [2024-06-28 03:28:55,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 373 flow [2024-06-28 03:28:55,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 334 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 03:28:55,498 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 224 flow [2024-06-28 03:28:55,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-28 03:28:55,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-28 03:28:55,499 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 224 flow [2024-06-28 03:28:55,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:55,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:55,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:55,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 03:28:55,500 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)] === [2024-06-28 03:28:55,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:55,500 INFO L85 PathProgramCache]: Analyzing trace with hash -819888251, now seen corresponding path program 1 times [2024-06-28 03:28:55,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:55,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582912935] [2024-06-28 03:28:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:55,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:56,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:56,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582912935] [2024-06-28 03:28:56,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582912935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:56,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:56,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:28:56,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526435942] [2024-06-28 03:28:56,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:56,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:28:56,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:56,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:28:56,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:28:56,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:28:56,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-28 03:28:56,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:56,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:28:56,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:56,593 INFO L124 PetriNetUnfolderBase]: 1883/2867 cut-off events. [2024-06-28 03:28:56,593 INFO L125 PetriNetUnfolderBase]: For 6041/6041 co-relation queries the response was YES. [2024-06-28 03:28:56,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8976 conditions, 2867 events. 1883/2867 cut-off events. For 6041/6041 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13569 event pairs, 763 based on Foata normal form. 6/2872 useless extension candidates. Maximal degree in co-relation 8956. Up to 2725 conditions per place. [2024-06-28 03:28:56,606 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 58 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2024-06-28 03:28:56,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 79 transitions, 494 flow [2024-06-28 03:28:56,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:28:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:28:56,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-28 03:28:56,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-28 03:28:56,609 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 224 flow. Second operand 6 states and 116 transitions. [2024-06-28 03:28:56,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 79 transitions, 494 flow [2024-06-28 03:28:56,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 79 transitions, 472 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 03:28:56,612 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 327 flow [2024-06-28 03:28:56,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2024-06-28 03:28:56,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-28 03:28:56,613 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 327 flow [2024-06-28 03:28:56,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-28 03:28:56,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:56,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:56,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 03:28:56,614 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)] === [2024-06-28 03:28:56,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:56,614 INFO L85 PathProgramCache]: Analyzing trace with hash 347547538, now seen corresponding path program 1 times [2024-06-28 03:28:56,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:56,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052429222] [2024-06-28 03:28:56,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:56,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:57,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:57,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052429222] [2024-06-28 03:28:57,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052429222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:57,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:57,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:28:57,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504069472] [2024-06-28 03:28:57,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:57,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:28:57,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:57,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:28:57,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:28:57,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:28:57,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 327 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-28 03:28:57,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:57,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:28:57,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:57,699 INFO L124 PetriNetUnfolderBase]: 1894/2918 cut-off events. [2024-06-28 03:28:57,699 INFO L125 PetriNetUnfolderBase]: For 9080/9084 co-relation queries the response was YES. [2024-06-28 03:28:57,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10162 conditions, 2918 events. 1894/2918 cut-off events. For 9080/9084 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14000 event pairs, 771 based on Foata normal form. 6/2922 useless extension candidates. Maximal degree in co-relation 10139. Up to 2754 conditions per place. [2024-06-28 03:28:57,712 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 66 selfloop transitions, 16 changer transitions 0/86 dead transitions. [2024-06-28 03:28:57,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 613 flow [2024-06-28 03:28:57,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:28:57,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:28:57,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-28 03:28:57,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-28 03:28:57,714 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 327 flow. Second operand 6 states and 115 transitions. [2024-06-28 03:28:57,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 613 flow [2024-06-28 03:28:57,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 86 transitions, 597 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-28 03:28:57,719 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 405 flow [2024-06-28 03:28:57,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=405, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-28 03:28:57,720 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-28 03:28:57,720 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 405 flow [2024-06-28 03:28:57,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-28 03:28:57,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:57,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:57,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 03:28:57,721 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)] === [2024-06-28 03:28:57,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:57,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1269334708, now seen corresponding path program 2 times [2024-06-28 03:28:57,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:57,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38982832] [2024-06-28 03:28:57,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:57,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:58,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:58,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38982832] [2024-06-28 03:28:58,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38982832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:58,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:58,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:28:58,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019472227] [2024-06-28 03:28:58,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:58,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:28:58,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:58,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:28:58,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:28:58,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:28:58,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 405 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-28 03:28:58,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:58,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:28:58,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:58,784 INFO L124 PetriNetUnfolderBase]: 1889/2910 cut-off events. [2024-06-28 03:28:58,784 INFO L125 PetriNetUnfolderBase]: For 11512/11512 co-relation queries the response was YES. [2024-06-28 03:28:58,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10762 conditions, 2910 events. 1889/2910 cut-off events. For 11512/11512 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13984 event pairs, 767 based on Foata normal form. 2/2910 useless extension candidates. Maximal degree in co-relation 10736. Up to 2773 conditions per place. [2024-06-28 03:28:58,802 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 66 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2024-06-28 03:28:58,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 81 transitions, 597 flow [2024-06-28 03:28:58,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:28:58,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:28:58,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-28 03:28:58,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:28:58,804 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 405 flow. Second operand 6 states and 108 transitions. [2024-06-28 03:28:58,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 81 transitions, 597 flow [2024-06-28 03:28:58,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 81 transitions, 555 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-28 03:28:58,813 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 393 flow [2024-06-28 03:28:58,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=393, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-06-28 03:28:58,816 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-28 03:28:58,816 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 393 flow [2024-06-28 03:28:58,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-28 03:28:58,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:58,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:58,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 03:28:58,816 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)] === [2024-06-28 03:28:58,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:58,817 INFO L85 PathProgramCache]: Analyzing trace with hash -2111046998, now seen corresponding path program 1 times [2024-06-28 03:28:58,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:58,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21669134] [2024-06-28 03:28:58,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:58,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:59,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:59,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21669134] [2024-06-28 03:28:59,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21669134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:59,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:59,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:28:59,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009669521] [2024-06-28 03:28:59,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:59,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:28:59,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:59,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:28:59,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:28:59,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:28:59,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 393 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:59,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:59,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:28:59,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:00,179 INFO L124 PetriNetUnfolderBase]: 1900/2926 cut-off events. [2024-06-28 03:29:00,179 INFO L125 PetriNetUnfolderBase]: For 13299/13299 co-relation queries the response was YES. [2024-06-28 03:29:00,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10968 conditions, 2926 events. 1900/2926 cut-off events. For 13299/13299 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14057 event pairs, 746 based on Foata normal form. 2/2926 useless extension candidates. Maximal degree in co-relation 10940. Up to 2768 conditions per place. [2024-06-28 03:29:00,192 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 76 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-06-28 03:29:00,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 94 transitions, 665 flow [2024-06-28 03:29:00,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:29:00,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:29:00,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 03:29:00,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-28 03:29:00,194 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 393 flow. Second operand 7 states and 130 transitions. [2024-06-28 03:29:00,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 94 transitions, 665 flow [2024-06-28 03:29:00,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 94 transitions, 631 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 03:29:00,203 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 429 flow [2024-06-28 03:29:00,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-28 03:29:00,204 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-28 03:29:00,204 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 429 flow [2024-06-28 03:29:00,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:00,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:00,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:00,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 03:29:00,204 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)] === [2024-06-28 03:29:00,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:00,205 INFO L85 PathProgramCache]: Analyzing trace with hash -2110926842, now seen corresponding path program 1 times [2024-06-28 03:29:00,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:00,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824757746] [2024-06-28 03:29:00,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:00,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:01,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:01,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824757746] [2024-06-28 03:29:01,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824757746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:01,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:01,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:29:01,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906933823] [2024-06-28 03:29:01,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:01,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:29:01,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:01,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:29:01,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:29:01,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:01,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 429 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:01,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:01,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:01,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:01,502 INFO L124 PetriNetUnfolderBase]: 1984/3043 cut-off events. [2024-06-28 03:29:01,503 INFO L125 PetriNetUnfolderBase]: For 16952/16956 co-relation queries the response was YES. [2024-06-28 03:29:01,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12028 conditions, 3043 events. 1984/3043 cut-off events. For 16952/16956 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14606 event pairs, 682 based on Foata normal form. 7/3049 useless extension candidates. Maximal degree in co-relation 12000. Up to 2747 conditions per place. [2024-06-28 03:29:01,516 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 86 selfloop transitions, 28 changer transitions 0/118 dead transitions. [2024-06-28 03:29:01,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 118 transitions, 935 flow [2024-06-28 03:29:01,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:29:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:29:01,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-28 03:29:01,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-28 03:29:01,517 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 429 flow. Second operand 7 states and 143 transitions. [2024-06-28 03:29:01,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 118 transitions, 935 flow [2024-06-28 03:29:01,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 118 transitions, 889 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 03:29:01,525 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 604 flow [2024-06-28 03:29:01,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=604, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2024-06-28 03:29:01,526 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-28 03:29:01,526 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 604 flow [2024-06-28 03:29:01,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:01,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:01,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:01,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 03:29:01,527 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)] === [2024-06-28 03:29:01,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:01,527 INFO L85 PathProgramCache]: Analyzing trace with hash -2110927028, now seen corresponding path program 2 times [2024-06-28 03:29:01,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:01,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311732177] [2024-06-28 03:29:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:01,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:02,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:02,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311732177] [2024-06-28 03:29:02,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311732177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:02,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:02,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:29:02,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732921091] [2024-06-28 03:29:02,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:02,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:29:02,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:02,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:29:02,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:29:02,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:02,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 604 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:02,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:02,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:02,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:02,808 INFO L124 PetriNetUnfolderBase]: 1995/3062 cut-off events. [2024-06-28 03:29:02,808 INFO L125 PetriNetUnfolderBase]: For 21866/21870 co-relation queries the response was YES. [2024-06-28 03:29:02,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13521 conditions, 3062 events. 1995/3062 cut-off events. For 21866/21870 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14633 event pairs, 719 based on Foata normal form. 6/3066 useless extension candidates. Maximal degree in co-relation 13489. Up to 2856 conditions per place. [2024-06-28 03:29:02,822 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 86 selfloop transitions, 26 changer transitions 0/116 dead transitions. [2024-06-28 03:29:02,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 116 transitions, 1004 flow [2024-06-28 03:29:02,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:29:02,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:29:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-28 03:29:02,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:29:02,824 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 604 flow. Second operand 7 states and 133 transitions. [2024-06-28 03:29:02,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 116 transitions, 1004 flow [2024-06-28 03:29:02,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 116 transitions, 968 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-28 03:29:02,838 INFO L231 Difference]: Finished difference. Result has 80 places, 92 transitions, 710 flow [2024-06-28 03:29:02,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=710, PETRI_PLACES=80, PETRI_TRANSITIONS=92} [2024-06-28 03:29:02,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-28 03:29:02,838 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 92 transitions, 710 flow [2024-06-28 03:29:02,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:02,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:02,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:02,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 03:29:02,839 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)] === [2024-06-28 03:29:02,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:02,839 INFO L85 PathProgramCache]: Analyzing trace with hash -673940364, now seen corresponding path program 2 times [2024-06-28 03:29:02,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:02,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775904265] [2024-06-28 03:29:02,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:02,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:03,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:03,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775904265] [2024-06-28 03:29:03,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775904265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:03,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:03,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:29:03,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109004189] [2024-06-28 03:29:03,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:03,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:29:03,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:03,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:29:03,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:29:03,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:03,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 92 transitions, 710 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:03,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:03,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:03,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:04,075 INFO L124 PetriNetUnfolderBase]: 2031/3111 cut-off events. [2024-06-28 03:29:04,075 INFO L125 PetriNetUnfolderBase]: For 26464/26464 co-relation queries the response was YES. [2024-06-28 03:29:04,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14381 conditions, 3111 events. 2031/3111 cut-off events. For 26464/26464 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14870 event pairs, 706 based on Foata normal form. 6/3116 useless extension candidates. Maximal degree in co-relation 14346. Up to 2931 conditions per place. [2024-06-28 03:29:04,088 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 95 selfloop transitions, 21 changer transitions 0/120 dead transitions. [2024-06-28 03:29:04,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 120 transitions, 1092 flow [2024-06-28 03:29:04,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:29:04,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:29:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-28 03:29:04,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-28 03:29:04,089 INFO L175 Difference]: Start difference. First operand has 80 places, 92 transitions, 710 flow. Second operand 7 states and 132 transitions. [2024-06-28 03:29:04,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 120 transitions, 1092 flow [2024-06-28 03:29:04,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 120 transitions, 1040 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-28 03:29:04,105 INFO L231 Difference]: Finished difference. Result has 85 places, 98 transitions, 775 flow [2024-06-28 03:29:04,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=775, PETRI_PLACES=85, PETRI_TRANSITIONS=98} [2024-06-28 03:29:04,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-28 03:29:04,106 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 98 transitions, 775 flow [2024-06-28 03:29:04,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:04,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:04,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:04,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 03:29:04,106 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:29:04,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:04,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1933795508, now seen corresponding path program 3 times [2024-06-28 03:29:04,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:04,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132894163] [2024-06-28 03:29:04,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:04,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:04,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:04,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132894163] [2024-06-28 03:29:04,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132894163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:04,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:04,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:29:04,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630330417] [2024-06-28 03:29:04,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:04,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:29:04,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:04,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:29:04,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:29:04,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:04,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 98 transitions, 775 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:04,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:04,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:04,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:05,341 INFO L124 PetriNetUnfolderBase]: 2026/3106 cut-off events. [2024-06-28 03:29:05,342 INFO L125 PetriNetUnfolderBase]: For 29589/29589 co-relation queries the response was YES. [2024-06-28 03:29:05,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14809 conditions, 3106 events. 2026/3106 cut-off events. For 29589/29589 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14865 event pairs, 712 based on Foata normal form. 2/3106 useless extension candidates. Maximal degree in co-relation 14771. Up to 2960 conditions per place. [2024-06-28 03:29:05,357 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 14 changer transitions 0/117 dead transitions. [2024-06-28 03:29:05,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 117 transitions, 1049 flow [2024-06-28 03:29:05,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:29:05,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:29:05,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-28 03:29:05,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-28 03:29:05,359 INFO L175 Difference]: Start difference. First operand has 85 places, 98 transitions, 775 flow. Second operand 7 states and 124 transitions. [2024-06-28 03:29:05,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 117 transitions, 1049 flow [2024-06-28 03:29:05,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 117 transitions, 974 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 03:29:05,379 INFO L231 Difference]: Finished difference. Result has 88 places, 98 transitions, 736 flow [2024-06-28 03:29:05,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=736, PETRI_PLACES=88, PETRI_TRANSITIONS=98} [2024-06-28 03:29:05,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-28 03:29:05,380 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 98 transitions, 736 flow [2024-06-28 03:29:05,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:05,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:05,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:05,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 03:29:05,381 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)] === [2024-06-28 03:29:05,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:05,381 INFO L85 PathProgramCache]: Analyzing trace with hash -219614138, now seen corresponding path program 3 times [2024-06-28 03:29:05,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:05,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089036150] [2024-06-28 03:29:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:05,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:05,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:05,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089036150] [2024-06-28 03:29:05,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089036150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:05,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:05,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:29:05,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463207872] [2024-06-28 03:29:05,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:05,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:29:05,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:05,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:29:05,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:29:05,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:05,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 98 transitions, 736 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:05,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:05,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:05,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:06,500 INFO L124 PetriNetUnfolderBase]: 2030/3110 cut-off events. [2024-06-28 03:29:06,500 INFO L125 PetriNetUnfolderBase]: For 32344/32344 co-relation queries the response was YES. [2024-06-28 03:29:06,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14946 conditions, 3110 events. 2030/3110 cut-off events. For 32344/32344 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14879 event pairs, 699 based on Foata normal form. 6/3115 useless extension candidates. Maximal degree in co-relation 14908. Up to 2870 conditions per place. [2024-06-28 03:29:06,514 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 98 selfloop transitions, 27 changer transitions 0/129 dead transitions. [2024-06-28 03:29:06,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 129 transitions, 1203 flow [2024-06-28 03:29:06,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:29:06,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:29:06,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-28 03:29:06,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-28 03:29:06,516 INFO L175 Difference]: Start difference. First operand has 88 places, 98 transitions, 736 flow. Second operand 7 states and 135 transitions. [2024-06-28 03:29:06,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 129 transitions, 1203 flow [2024-06-28 03:29:06,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 129 transitions, 1159 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 03:29:06,535 INFO L231 Difference]: Finished difference. Result has 90 places, 105 transitions, 854 flow [2024-06-28 03:29:06,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=854, PETRI_PLACES=90, PETRI_TRANSITIONS=105} [2024-06-28 03:29:06,536 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-28 03:29:06,537 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 105 transitions, 854 flow [2024-06-28 03:29:06,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:06,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:06,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:06,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 03:29:06,538 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)] === [2024-06-28 03:29:06,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:06,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1933549244, now seen corresponding path program 1 times [2024-06-28 03:29:06,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:06,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695281903] [2024-06-28 03:29:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:06,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:07,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:07,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695281903] [2024-06-28 03:29:07,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695281903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:07,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:07,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:07,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701850432] [2024-06-28 03:29:07,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:07,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:07,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:07,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:07,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:07,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:07,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 105 transitions, 854 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:07,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:07,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:07,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:08,236 INFO L124 PetriNetUnfolderBase]: 2033/3114 cut-off events. [2024-06-28 03:29:08,236 INFO L125 PetriNetUnfolderBase]: For 37304/37304 co-relation queries the response was YES. [2024-06-28 03:29:08,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15548 conditions, 3114 events. 2033/3114 cut-off events. For 37304/37304 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14871 event pairs, 679 based on Foata normal form. 6/3119 useless extension candidates. Maximal degree in co-relation 15508. Up to 2915 conditions per place. [2024-06-28 03:29:08,257 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 101 selfloop transitions, 25 changer transitions 0/130 dead transitions. [2024-06-28 03:29:08,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 130 transitions, 1256 flow [2024-06-28 03:29:08,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:29:08,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:29:08,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-28 03:29:08,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:29:08,267 INFO L175 Difference]: Start difference. First operand has 90 places, 105 transitions, 854 flow. Second operand 7 states and 133 transitions. [2024-06-28 03:29:08,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 130 transitions, 1256 flow [2024-06-28 03:29:08,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 130 transitions, 1205 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-28 03:29:08,303 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 907 flow [2024-06-28 03:29:08,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=907, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-06-28 03:29:08,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-28 03:29:08,305 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 907 flow [2024-06-28 03:29:08,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:08,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:08,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:08,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 03:29:08,306 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:29:08,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:08,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1517442386, now seen corresponding path program 1 times [2024-06-28 03:29:08,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:08,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68186550] [2024-06-28 03:29:08,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:08,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:08,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:08,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68186550] [2024-06-28 03:29:08,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68186550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:08,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:08,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:29:08,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282710857] [2024-06-28 03:29:08,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:08,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:29:08,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:08,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:29:08,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:29:08,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:29:08,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 907 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:08,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:08,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:29:08,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:09,455 INFO L124 PetriNetUnfolderBase]: 1904/2984 cut-off events. [2024-06-28 03:29:09,456 INFO L125 PetriNetUnfolderBase]: For 40030/40030 co-relation queries the response was YES. [2024-06-28 03:29:09,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15435 conditions, 2984 events. 1904/2984 cut-off events. For 40030/40030 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14710 event pairs, 703 based on Foata normal form. 1/2984 useless extension candidates. Maximal degree in co-relation 15393. Up to 2769 conditions per place. [2024-06-28 03:29:09,470 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 94 selfloop transitions, 8 changer transitions 0/116 dead transitions. [2024-06-28 03:29:09,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 116 transitions, 1131 flow [2024-06-28 03:29:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:29:09,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:29:09,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-28 03:29:09,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-28 03:29:09,471 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 907 flow. Second operand 5 states and 92 transitions. [2024-06-28 03:29:09,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 116 transitions, 1131 flow [2024-06-28 03:29:09,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 116 transitions, 1043 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-28 03:29:09,496 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 841 flow [2024-06-28 03:29:09,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=841, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-06-28 03:29:09,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-28 03:29:09,496 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 841 flow [2024-06-28 03:29:09,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:09,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:09,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:09,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 03:29:09,497 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)] === [2024-06-28 03:29:09,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:09,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1018036495, now seen corresponding path program 1 times [2024-06-28 03:29:09,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:09,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040579548] [2024-06-28 03:29:09,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:09,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:10,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:10,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040579548] [2024-06-28 03:29:10,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040579548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:10,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:10,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:10,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064505357] [2024-06-28 03:29:10,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:10,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:10,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:10,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:10,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:10,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:10,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 841 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:10,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:10,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:10,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:11,119 INFO L124 PetriNetUnfolderBase]: 2057/3149 cut-off events. [2024-06-28 03:29:11,120 INFO L125 PetriNetUnfolderBase]: For 44378/44378 co-relation queries the response was YES. [2024-06-28 03:29:11,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16378 conditions, 3149 events. 2057/3149 cut-off events. For 44378/44378 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15036 event pairs, 682 based on Foata normal form. 2/3150 useless extension candidates. Maximal degree in co-relation 16335. Up to 2959 conditions per place. [2024-06-28 03:29:11,136 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 125 selfloop transitions, 23 changer transitions 0/152 dead transitions. [2024-06-28 03:29:11,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 152 transitions, 1391 flow [2024-06-28 03:29:11,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:29:11,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:29:11,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 03:29:11,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 03:29:11,140 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 841 flow. Second operand 9 states and 168 transitions. [2024-06-28 03:29:11,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 152 transitions, 1391 flow [2024-06-28 03:29:11,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 152 transitions, 1369 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 03:29:11,202 INFO L231 Difference]: Finished difference. Result has 99 places, 114 transitions, 975 flow [2024-06-28 03:29:11,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=975, PETRI_PLACES=99, PETRI_TRANSITIONS=114} [2024-06-28 03:29:11,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-28 03:29:11,202 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 114 transitions, 975 flow [2024-06-28 03:29:11,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:11,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:11,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:11,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 03:29:11,203 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)] === [2024-06-28 03:29:11,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:11,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1582445976, now seen corresponding path program 1 times [2024-06-28 03:29:11,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:11,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352300230] [2024-06-28 03:29:11,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:11,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:12,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:12,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352300230] [2024-06-28 03:29:12,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352300230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:12,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:12,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:12,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616219390] [2024-06-28 03:29:12,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:12,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:12,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:12,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:12,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:12,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:12,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 114 transitions, 975 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:12,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:12,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:12,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:12,744 INFO L124 PetriNetUnfolderBase]: 2168/3321 cut-off events. [2024-06-28 03:29:12,745 INFO L125 PetriNetUnfolderBase]: For 52691/52691 co-relation queries the response was YES. [2024-06-28 03:29:12,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17953 conditions, 3321 events. 2168/3321 cut-off events. For 52691/52691 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15980 event pairs, 1001 based on Foata normal form. 6/3326 useless extension candidates. Maximal degree in co-relation 17910. Up to 3101 conditions per place. [2024-06-28 03:29:12,763 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 135 selfloop transitions, 29 changer transitions 0/168 dead transitions. [2024-06-28 03:29:12,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 168 transitions, 1730 flow [2024-06-28 03:29:12,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:29:12,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:29:12,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 03:29:12,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-28 03:29:12,780 INFO L175 Difference]: Start difference. First operand has 99 places, 114 transitions, 975 flow. Second operand 9 states and 163 transitions. [2024-06-28 03:29:12,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 168 transitions, 1730 flow [2024-06-28 03:29:12,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 168 transitions, 1643 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-28 03:29:12,846 INFO L231 Difference]: Finished difference. Result has 107 places, 136 transitions, 1242 flow [2024-06-28 03:29:12,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1242, PETRI_PLACES=107, PETRI_TRANSITIONS=136} [2024-06-28 03:29:12,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-28 03:29:12,847 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 136 transitions, 1242 flow [2024-06-28 03:29:12,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:12,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:12,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:12,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 03:29:12,847 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)] === [2024-06-28 03:29:12,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:12,848 INFO L85 PathProgramCache]: Analyzing trace with hash 985376719, now seen corresponding path program 2 times [2024-06-28 03:29:12,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:12,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189679726] [2024-06-28 03:29:12,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:12,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:13,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:13,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189679726] [2024-06-28 03:29:13,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189679726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:13,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:13,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:13,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762195973] [2024-06-28 03:29:13,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:13,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:13,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:13,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:13,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:13,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:13,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 136 transitions, 1242 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:13,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:13,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:13,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:14,323 INFO L124 PetriNetUnfolderBase]: 2230/3405 cut-off events. [2024-06-28 03:29:14,323 INFO L125 PetriNetUnfolderBase]: For 59578/59584 co-relation queries the response was YES. [2024-06-28 03:29:14,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19507 conditions, 3405 events. 2230/3405 cut-off events. For 59578/59584 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16335 event pairs, 685 based on Foata normal form. 6/3410 useless extension candidates. Maximal degree in co-relation 19458. Up to 3181 conditions per place. [2024-06-28 03:29:14,343 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 147 selfloop transitions, 42 changer transitions 0/193 dead transitions. [2024-06-28 03:29:14,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 193 transitions, 1893 flow [2024-06-28 03:29:14,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:29:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:29:14,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-28 03:29:14,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774891774891776 [2024-06-28 03:29:14,345 INFO L175 Difference]: Start difference. First operand has 107 places, 136 transitions, 1242 flow. Second operand 11 states and 193 transitions. [2024-06-28 03:29:14,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 193 transitions, 1893 flow [2024-06-28 03:29:14,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 193 transitions, 1819 flow, removed 36 selfloop flow, removed 1 redundant places. [2024-06-28 03:29:14,390 INFO L231 Difference]: Finished difference. Result has 119 places, 157 transitions, 1465 flow [2024-06-28 03:29:14,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1465, PETRI_PLACES=119, PETRI_TRANSITIONS=157} [2024-06-28 03:29:14,391 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-28 03:29:14,391 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 157 transitions, 1465 flow [2024-06-28 03:29:14,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:14,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:14,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:14,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 03:29:14,391 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)] === [2024-06-28 03:29:14,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:14,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1640196797, now seen corresponding path program 3 times [2024-06-28 03:29:14,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:14,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996055990] [2024-06-28 03:29:14,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:14,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:15,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:15,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996055990] [2024-06-28 03:29:15,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996055990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:15,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:15,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:15,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098909049] [2024-06-28 03:29:15,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:15,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:15,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:15,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:15,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:15,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:15,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 157 transitions, 1465 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:15,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:15,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:15,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:16,276 INFO L124 PetriNetUnfolderBase]: 2283/3492 cut-off events. [2024-06-28 03:29:16,277 INFO L125 PetriNetUnfolderBase]: For 66888/66890 co-relation queries the response was YES. [2024-06-28 03:29:16,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20479 conditions, 3492 events. 2283/3492 cut-off events. For 66888/66890 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16912 event pairs, 865 based on Foata normal form. 4/3495 useless extension candidates. Maximal degree in co-relation 20425. Up to 3255 conditions per place. [2024-06-28 03:29:16,297 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 157 selfloop transitions, 51 changer transitions 0/212 dead transitions. [2024-06-28 03:29:16,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 212 transitions, 2288 flow [2024-06-28 03:29:16,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:29:16,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:29:16,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 03:29:16,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-28 03:29:16,298 INFO L175 Difference]: Start difference. First operand has 119 places, 157 transitions, 1465 flow. Second operand 9 states and 163 transitions. [2024-06-28 03:29:16,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 212 transitions, 2288 flow [2024-06-28 03:29:16,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 212 transitions, 2119 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-28 03:29:16,353 INFO L231 Difference]: Finished difference. Result has 125 places, 184 transitions, 1804 flow [2024-06-28 03:29:16,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1362, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1804, PETRI_PLACES=125, PETRI_TRANSITIONS=184} [2024-06-28 03:29:16,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-28 03:29:16,354 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 184 transitions, 1804 flow [2024-06-28 03:29:16,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:16,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:16,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:16,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 03:29:16,354 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:29:16,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:16,355 INFO L85 PathProgramCache]: Analyzing trace with hash 955826124, now seen corresponding path program 2 times [2024-06-28 03:29:16,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:16,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329686715] [2024-06-28 03:29:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:16,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:16,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:16,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329686715] [2024-06-28 03:29:16,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329686715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:16,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:16,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:16,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018269948] [2024-06-28 03:29:16,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:16,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:16,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:16,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:16,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:17,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:17,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 184 transitions, 1804 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:17,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:17,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:17,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:17,872 INFO L124 PetriNetUnfolderBase]: 2539/3847 cut-off events. [2024-06-28 03:29:17,872 INFO L125 PetriNetUnfolderBase]: For 79225/79227 co-relation queries the response was YES. [2024-06-28 03:29:17,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23141 conditions, 3847 events. 2539/3847 cut-off events. For 79225/79227 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 18830 event pairs, 888 based on Foata normal form. 8/3850 useless extension candidates. Maximal degree in co-relation 23083. Up to 3362 conditions per place. [2024-06-28 03:29:17,899 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 180 selfloop transitions, 94 changer transitions 0/278 dead transitions. [2024-06-28 03:29:17,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 278 transitions, 3306 flow [2024-06-28 03:29:17,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:29:17,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:29:17,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-28 03:29:17,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-06-28 03:29:17,917 INFO L175 Difference]: Start difference. First operand has 125 places, 184 transitions, 1804 flow. Second operand 11 states and 214 transitions. [2024-06-28 03:29:17,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 278 transitions, 3306 flow [2024-06-28 03:29:17,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 278 transitions, 3232 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-28 03:29:17,986 INFO L231 Difference]: Finished difference. Result has 135 places, 226 transitions, 2401 flow [2024-06-28 03:29:17,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2401, PETRI_PLACES=135, PETRI_TRANSITIONS=226} [2024-06-28 03:29:17,987 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-28 03:29:17,987 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 226 transitions, 2401 flow [2024-06-28 03:29:17,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:17,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:17,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:17,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 03:29:17,988 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)] === [2024-06-28 03:29:17,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:17,988 INFO L85 PathProgramCache]: Analyzing trace with hash 247270526, now seen corresponding path program 3 times [2024-06-28 03:29:17,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:17,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990035478] [2024-06-28 03:29:17,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:17,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:18,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:18,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990035478] [2024-06-28 03:29:18,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990035478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:18,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:18,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:18,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187371451] [2024-06-28 03:29:18,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:18,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:18,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:18,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:18,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:18,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:18,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 226 transitions, 2401 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:18,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:18,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:18,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:19,597 INFO L124 PetriNetUnfolderBase]: 2703/4078 cut-off events. [2024-06-28 03:29:19,598 INFO L125 PetriNetUnfolderBase]: For 93668/93670 co-relation queries the response was YES. [2024-06-28 03:29:19,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26497 conditions, 4078 events. 2703/4078 cut-off events. For 93668/93670 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 20071 event pairs, 877 based on Foata normal form. 12/4086 useless extension candidates. Maximal degree in co-relation 26436. Up to 3666 conditions per place. [2024-06-28 03:29:19,633 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 199 selfloop transitions, 102 changer transitions 0/305 dead transitions. [2024-06-28 03:29:19,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 305 transitions, 3882 flow [2024-06-28 03:29:19,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:29:19,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:29:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-28 03:29:19,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-28 03:29:19,634 INFO L175 Difference]: Start difference. First operand has 135 places, 226 transitions, 2401 flow. Second operand 9 states and 176 transitions. [2024-06-28 03:29:19,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 305 transitions, 3882 flow [2024-06-28 03:29:19,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 305 transitions, 3617 flow, removed 99 selfloop flow, removed 5 redundant places. [2024-06-28 03:29:19,753 INFO L231 Difference]: Finished difference. Result has 141 places, 268 transitions, 3056 flow [2024-06-28 03:29:19,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3056, PETRI_PLACES=141, PETRI_TRANSITIONS=268} [2024-06-28 03:29:19,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-28 03:29:19,754 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 268 transitions, 3056 flow [2024-06-28 03:29:19,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:19,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:19,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:19,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 03:29:19,755 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)] === [2024-06-28 03:29:19,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:19,756 INFO L85 PathProgramCache]: Analyzing trace with hash 247414521, now seen corresponding path program 4 times [2024-06-28 03:29:19,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:19,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932998292] [2024-06-28 03:29:19,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:19,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:20,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:20,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932998292] [2024-06-28 03:29:20,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932998292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:20,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:20,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:20,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217322572] [2024-06-28 03:29:20,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:20,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:20,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:20,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:20,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:20,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:20,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 268 transitions, 3056 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:20,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:20,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:20,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:21,679 INFO L124 PetriNetUnfolderBase]: 2764/4172 cut-off events. [2024-06-28 03:29:21,679 INFO L125 PetriNetUnfolderBase]: For 101030/101036 co-relation queries the response was YES. [2024-06-28 03:29:21,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27797 conditions, 4172 events. 2764/4172 cut-off events. For 101030/101036 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 20579 event pairs, 891 based on Foata normal form. 8/4176 useless extension candidates. Maximal degree in co-relation 27734. Up to 3839 conditions per place. [2024-06-28 03:29:21,708 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 230 selfloop transitions, 85 changer transitions 0/319 dead transitions. [2024-06-28 03:29:21,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 319 transitions, 3996 flow [2024-06-28 03:29:21,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:29:21,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:29:21,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 03:29:21,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-28 03:29:21,710 INFO L175 Difference]: Start difference. First operand has 141 places, 268 transitions, 3056 flow. Second operand 9 states and 166 transitions. [2024-06-28 03:29:21,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 319 transitions, 3996 flow [2024-06-28 03:29:21,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 319 transitions, 3911 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-28 03:29:21,808 INFO L231 Difference]: Finished difference. Result has 150 places, 289 transitions, 3398 flow [2024-06-28 03:29:21,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2971, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3398, PETRI_PLACES=150, PETRI_TRANSITIONS=289} [2024-06-28 03:29:21,809 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-28 03:29:21,809 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 289 transitions, 3398 flow [2024-06-28 03:29:21,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:21,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:21,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:21,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 03:29:21,809 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)] === [2024-06-28 03:29:21,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:21,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1640341102, now seen corresponding path program 4 times [2024-06-28 03:29:21,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:21,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886348580] [2024-06-28 03:29:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:21,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:22,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:22,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886348580] [2024-06-28 03:29:22,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886348580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:22,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:22,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:22,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21821804] [2024-06-28 03:29:22,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:22,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:22,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:22,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:22,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:22,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:22,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 289 transitions, 3398 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:22,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:22,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:22,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:23,511 INFO L124 PetriNetUnfolderBase]: 3078/4613 cut-off events. [2024-06-28 03:29:23,512 INFO L125 PetriNetUnfolderBase]: For 120858/120864 co-relation queries the response was YES. [2024-06-28 03:29:23,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31638 conditions, 4613 events. 3078/4613 cut-off events. For 120858/120864 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 23069 event pairs, 898 based on Foata normal form. 8/4618 useless extension candidates. Maximal degree in co-relation 31571. Up to 3499 conditions per place. [2024-06-28 03:29:23,550 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 230 selfloop transitions, 161 changer transitions 0/395 dead transitions. [2024-06-28 03:29:23,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 395 transitions, 5385 flow [2024-06-28 03:29:23,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:29:23,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:29:23,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-28 03:29:23,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-06-28 03:29:23,555 INFO L175 Difference]: Start difference. First operand has 150 places, 289 transitions, 3398 flow. Second operand 9 states and 188 transitions. [2024-06-28 03:29:23,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 395 transitions, 5385 flow [2024-06-28 03:29:23,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 395 transitions, 5242 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-28 03:29:23,675 INFO L231 Difference]: Finished difference. Result has 160 places, 326 transitions, 4165 flow [2024-06-28 03:29:23,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3255, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4165, PETRI_PLACES=160, PETRI_TRANSITIONS=326} [2024-06-28 03:29:23,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-28 03:29:23,676 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 326 transitions, 4165 flow [2024-06-28 03:29:23,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:23,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:23,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:23,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 03:29:23,676 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)] === [2024-06-28 03:29:23,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:23,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1134000416, now seen corresponding path program 5 times [2024-06-28 03:29:23,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:23,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606571240] [2024-06-28 03:29:23,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:23,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:24,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:24,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606571240] [2024-06-28 03:29:24,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606571240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:24,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:24,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:24,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247903565] [2024-06-28 03:29:24,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:24,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:24,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:24,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:24,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:24,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:24,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 326 transitions, 4165 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:24,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:24,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:24,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:25,436 INFO L124 PetriNetUnfolderBase]: 3082/4619 cut-off events. [2024-06-28 03:29:25,436 INFO L125 PetriNetUnfolderBase]: For 136036/136042 co-relation queries the response was YES. [2024-06-28 03:29:25,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34265 conditions, 4619 events. 3082/4619 cut-off events. For 136036/136042 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 23141 event pairs, 872 based on Foata normal form. 8/4624 useless extension candidates. Maximal degree in co-relation 34193. Up to 3508 conditions per place. [2024-06-28 03:29:25,469 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 211 selfloop transitions, 182 changer transitions 0/397 dead transitions. [2024-06-28 03:29:25,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 397 transitions, 5804 flow [2024-06-28 03:29:25,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:29:25,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:29:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-28 03:29:25,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-28 03:29:25,470 INFO L175 Difference]: Start difference. First operand has 160 places, 326 transitions, 4165 flow. Second operand 9 states and 186 transitions. [2024-06-28 03:29:25,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 397 transitions, 5804 flow [2024-06-28 03:29:25,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 397 transitions, 5642 flow, removed 74 selfloop flow, removed 2 redundant places. [2024-06-28 03:29:25,601 INFO L231 Difference]: Finished difference. Result has 169 places, 332 transitions, 4610 flow [2024-06-28 03:29:25,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4029, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4610, PETRI_PLACES=169, PETRI_TRANSITIONS=332} [2024-06-28 03:29:25,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-28 03:29:25,602 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 332 transitions, 4610 flow [2024-06-28 03:29:25,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:25,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:25,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:25,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 03:29:25,602 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)] === [2024-06-28 03:29:25,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:25,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1017946285, now seen corresponding path program 5 times [2024-06-28 03:29:25,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:25,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761567818] [2024-06-28 03:29:25,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:25,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:25,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:26,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:26,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761567818] [2024-06-28 03:29:26,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761567818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:26,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:26,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:26,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924026761] [2024-06-28 03:29:26,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:26,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:26,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:26,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:26,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:26,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:26,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 332 transitions, 4610 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:26,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:26,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:26,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:27,416 INFO L124 PetriNetUnfolderBase]: 3077/4618 cut-off events. [2024-06-28 03:29:27,416 INFO L125 PetriNetUnfolderBase]: For 141893/141895 co-relation queries the response was YES. [2024-06-28 03:29:27,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35214 conditions, 4618 events. 3077/4618 cut-off events. For 141893/141895 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 23162 event pairs, 999 based on Foata normal form. 4/4618 useless extension candidates. Maximal degree in co-relation 35138. Up to 4326 conditions per place. [2024-06-28 03:29:27,455 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 288 selfloop transitions, 66 changer transitions 0/358 dead transitions. [2024-06-28 03:29:27,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 358 transitions, 5436 flow [2024-06-28 03:29:27,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:29:27,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:29:27,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 03:29:27,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 03:29:27,456 INFO L175 Difference]: Start difference. First operand has 169 places, 332 transitions, 4610 flow. Second operand 8 states and 146 transitions. [2024-06-28 03:29:27,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 358 transitions, 5436 flow [2024-06-28 03:29:27,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 358 transitions, 5128 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-28 03:29:27,601 INFO L231 Difference]: Finished difference. Result has 172 places, 332 transitions, 4458 flow [2024-06-28 03:29:27,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4302, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4458, PETRI_PLACES=172, PETRI_TRANSITIONS=332} [2024-06-28 03:29:27,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-28 03:29:27,602 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 332 transitions, 4458 flow [2024-06-28 03:29:27,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:27,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:27,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:27,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 03:29:27,602 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:29:27,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:27,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1688783957, now seen corresponding path program 6 times [2024-06-28 03:29:27,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:27,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960129863] [2024-06-28 03:29:27,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:27,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:28,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:28,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960129863] [2024-06-28 03:29:28,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960129863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:28,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:28,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:28,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045146029] [2024-06-28 03:29:28,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:28,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:28,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:28,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:28,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:28,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:28,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 332 transitions, 4458 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:28,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:28,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:28,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:29,301 INFO L124 PetriNetUnfolderBase]: 3088/4637 cut-off events. [2024-06-28 03:29:29,302 INFO L125 PetriNetUnfolderBase]: For 148043/148049 co-relation queries the response was YES. [2024-06-28 03:29:29,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34986 conditions, 4637 events. 3088/4637 cut-off events. For 148043/148049 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 23269 event pairs, 938 based on Foata normal form. 8/4641 useless extension candidates. Maximal degree in co-relation 34909. Up to 4285 conditions per place. [2024-06-28 03:29:29,338 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 272 selfloop transitions, 85 changer transitions 0/361 dead transitions. [2024-06-28 03:29:29,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 361 transitions, 5392 flow [2024-06-28 03:29:29,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:29:29,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:29:29,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 03:29:29,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 03:29:29,340 INFO L175 Difference]: Start difference. First operand has 172 places, 332 transitions, 4458 flow. Second operand 8 states and 147 transitions. [2024-06-28 03:29:29,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 361 transitions, 5392 flow [2024-06-28 03:29:29,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 361 transitions, 5234 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 03:29:29,480 INFO L231 Difference]: Finished difference. Result has 173 places, 335 transitions, 4567 flow [2024-06-28 03:29:29,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4300, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4567, PETRI_PLACES=173, PETRI_TRANSITIONS=335} [2024-06-28 03:29:29,481 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-28 03:29:29,481 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 335 transitions, 4567 flow [2024-06-28 03:29:29,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:29,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:29,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:29,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 03:29:29,482 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)] === [2024-06-28 03:29:29,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:29,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1014227060, now seen corresponding path program 6 times [2024-06-28 03:29:29,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:29,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662813474] [2024-06-28 03:29:29,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:29,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:30,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:30,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662813474] [2024-06-28 03:29:30,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662813474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:30,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:30,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:30,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862169565] [2024-06-28 03:29:30,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:30,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:30,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:30,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:30,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:30,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:30,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 335 transitions, 4567 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:30,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:30,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:30,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:31,230 INFO L124 PetriNetUnfolderBase]: 3276/4896 cut-off events. [2024-06-28 03:29:31,230 INFO L125 PetriNetUnfolderBase]: For 157293/157299 co-relation queries the response was YES. [2024-06-28 03:29:31,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37675 conditions, 4896 events. 3276/4896 cut-off events. For 157293/157299 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 24704 event pairs, 934 based on Foata normal form. 12/4905 useless extension candidates. Maximal degree in co-relation 37597. Up to 3554 conditions per place. [2024-06-28 03:29:31,271 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 197 selfloop transitions, 200 changer transitions 0/401 dead transitions. [2024-06-28 03:29:31,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 401 transitions, 6372 flow [2024-06-28 03:29:31,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:29:31,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:29:31,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-28 03:29:31,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-28 03:29:31,272 INFO L175 Difference]: Start difference. First operand has 173 places, 335 transitions, 4567 flow. Second operand 8 states and 166 transitions. [2024-06-28 03:29:31,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 401 transitions, 6372 flow [2024-06-28 03:29:31,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 401 transitions, 6145 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-28 03:29:31,423 INFO L231 Difference]: Finished difference. Result has 176 places, 356 transitions, 5150 flow [2024-06-28 03:29:31,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4340, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5150, PETRI_PLACES=176, PETRI_TRANSITIONS=356} [2024-06-28 03:29:31,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-28 03:29:31,424 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 356 transitions, 5150 flow [2024-06-28 03:29:31,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:31,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:31,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:31,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 03:29:31,424 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)] === [2024-06-28 03:29:31,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:31,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1014221480, now seen corresponding path program 7 times [2024-06-28 03:29:31,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:31,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466068266] [2024-06-28 03:29:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:31,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:32,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:32,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466068266] [2024-06-28 03:29:32,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466068266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:32,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:32,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:32,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373518933] [2024-06-28 03:29:32,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:32,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:32,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:32,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:32,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:32,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:32,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 356 transitions, 5150 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:32,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:32,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:32,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:33,093 INFO L124 PetriNetUnfolderBase]: 3288/4915 cut-off events. [2024-06-28 03:29:33,094 INFO L125 PetriNetUnfolderBase]: For 172668/172674 co-relation queries the response was YES. [2024-06-28 03:29:33,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39568 conditions, 4915 events. 3288/4915 cut-off events. For 172668/172674 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 24815 event pairs, 891 based on Foata normal form. 12/4924 useless extension candidates. Maximal degree in co-relation 39488. Up to 3575 conditions per place. [2024-06-28 03:29:33,137 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 170 selfloop transitions, 233 changer transitions 0/407 dead transitions. [2024-06-28 03:29:33,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 407 transitions, 6658 flow [2024-06-28 03:29:33,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:29:33,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:29:33,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-28 03:29:33,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-28 03:29:33,139 INFO L175 Difference]: Start difference. First operand has 176 places, 356 transitions, 5150 flow. Second operand 8 states and 164 transitions. [2024-06-28 03:29:33,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 407 transitions, 6658 flow [2024-06-28 03:29:33,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 407 transitions, 6256 flow, removed 141 selfloop flow, removed 3 redundant places. [2024-06-28 03:29:33,398 INFO L231 Difference]: Finished difference. Result has 181 places, 365 transitions, 5434 flow [2024-06-28 03:29:33,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4818, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5434, PETRI_PLACES=181, PETRI_TRANSITIONS=365} [2024-06-28 03:29:33,400 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-28 03:29:33,400 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 365 transitions, 5434 flow [2024-06-28 03:29:33,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:33,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:33,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:33,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 03:29:33,401 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)] === [2024-06-28 03:29:33,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:33,401 INFO L85 PathProgramCache]: Analyzing trace with hash 582484568, now seen corresponding path program 8 times [2024-06-28 03:29:33,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:33,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26280595] [2024-06-28 03:29:33,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:33,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:34,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:34,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26280595] [2024-06-28 03:29:34,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26280595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:34,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:34,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:34,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937563200] [2024-06-28 03:29:34,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:34,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:34,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:34,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:34,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:34,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:34,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 365 transitions, 5434 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:34,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:34,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:34,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:35,208 INFO L124 PetriNetUnfolderBase]: 3436/5134 cut-off events. [2024-06-28 03:29:35,208 INFO L125 PetriNetUnfolderBase]: For 176925/176925 co-relation queries the response was YES. [2024-06-28 03:29:35,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41515 conditions, 5134 events. 3436/5134 cut-off events. For 176925/176925 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 26129 event pairs, 1211 based on Foata normal form. 10/5140 useless extension candidates. Maximal degree in co-relation 41433. Up to 4569 conditions per place. [2024-06-28 03:29:35,263 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 353 selfloop transitions, 65 changer transitions 0/422 dead transitions. [2024-06-28 03:29:35,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 422 transitions, 7202 flow [2024-06-28 03:29:35,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:29:35,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:29:35,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 03:29:35,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-28 03:29:35,264 INFO L175 Difference]: Start difference. First operand has 181 places, 365 transitions, 5434 flow. Second operand 8 states and 157 transitions. [2024-06-28 03:29:35,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 422 transitions, 7202 flow [2024-06-28 03:29:35,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 422 transitions, 6746 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-28 03:29:35,444 INFO L231 Difference]: Finished difference. Result has 186 places, 384 transitions, 5605 flow [2024-06-28 03:29:35,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5026, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5605, PETRI_PLACES=186, PETRI_TRANSITIONS=384} [2024-06-28 03:29:35,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-28 03:29:35,453 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 384 transitions, 5605 flow [2024-06-28 03:29:35,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:35,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:35,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:35,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 03:29:35,453 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:29:35,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:35,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1789256803, now seen corresponding path program 1 times [2024-06-28 03:29:35,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:35,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337979225] [2024-06-28 03:29:35,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:35,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:36,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:36,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337979225] [2024-06-28 03:29:36,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337979225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:36,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:36,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:36,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427427854] [2024-06-28 03:29:36,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:36,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:36,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:36,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:36,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:36,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:36,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 384 transitions, 5605 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:36,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:36,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:36,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:37,234 INFO L124 PetriNetUnfolderBase]: 3438/5143 cut-off events. [2024-06-28 03:29:37,234 INFO L125 PetriNetUnfolderBase]: For 172585/172585 co-relation queries the response was YES. [2024-06-28 03:29:37,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40938 conditions, 5143 events. 3438/5143 cut-off events. For 172585/172585 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 26184 event pairs, 1213 based on Foata normal form. 3/5145 useless extension candidates. Maximal degree in co-relation 40853. Up to 4890 conditions per place. [2024-06-28 03:29:37,283 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 373 selfloop transitions, 33 changer transitions 0/410 dead transitions. [2024-06-28 03:29:37,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 410 transitions, 6662 flow [2024-06-28 03:29:37,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:29:37,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:29:37,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-28 03:29:37,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:29:37,285 INFO L175 Difference]: Start difference. First operand has 186 places, 384 transitions, 5605 flow. Second operand 7 states and 133 transitions. [2024-06-28 03:29:37,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 410 transitions, 6662 flow [2024-06-28 03:29:37,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 410 transitions, 6203 flow, removed 116 selfloop flow, removed 6 redundant places. [2024-06-28 03:29:37,482 INFO L231 Difference]: Finished difference. Result has 187 places, 388 transitions, 5312 flow [2024-06-28 03:29:37,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5146, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5312, PETRI_PLACES=187, PETRI_TRANSITIONS=388} [2024-06-28 03:29:37,483 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-28 03:29:37,483 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 388 transitions, 5312 flow [2024-06-28 03:29:37,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:37,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:37,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:37,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 03:29:37,485 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:29:37,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:37,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1781891761, now seen corresponding path program 7 times [2024-06-28 03:29:37,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:37,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806308460] [2024-06-28 03:29:37,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:37,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:38,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:38,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806308460] [2024-06-28 03:29:38,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806308460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:38,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:38,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:38,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230976658] [2024-06-28 03:29:38,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:38,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:38,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:38,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:38,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:38,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:38,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 388 transitions, 5312 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:38,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:38,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:38,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:39,351 INFO L124 PetriNetUnfolderBase]: 3433/5137 cut-off events. [2024-06-28 03:29:39,352 INFO L125 PetriNetUnfolderBase]: For 170575/170575 co-relation queries the response was YES. [2024-06-28 03:29:39,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40058 conditions, 5137 events. 3433/5137 cut-off events. For 170575/170575 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 26165 event pairs, 1223 based on Foata normal form. 2/5138 useless extension candidates. Maximal degree in co-relation 39973. Up to 4938 conditions per place. [2024-06-28 03:29:39,402 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 386 selfloop transitions, 23 changer transitions 0/413 dead transitions. [2024-06-28 03:29:39,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 413 transitions, 6332 flow [2024-06-28 03:29:39,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:29:39,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:29:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 03:29:39,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 03:29:39,404 INFO L175 Difference]: Start difference. First operand has 187 places, 388 transitions, 5312 flow. Second operand 8 states and 140 transitions. [2024-06-28 03:29:39,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 413 transitions, 6332 flow [2024-06-28 03:29:39,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 413 transitions, 6222 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-28 03:29:39,608 INFO L231 Difference]: Finished difference. Result has 190 places, 391 transitions, 5353 flow [2024-06-28 03:29:39,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5202, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5353, PETRI_PLACES=190, PETRI_TRANSITIONS=391} [2024-06-28 03:29:39,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-28 03:29:39,609 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 391 transitions, 5353 flow [2024-06-28 03:29:39,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:39,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:39,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:39,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 03:29:39,610 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:29:39,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:39,610 INFO L85 PathProgramCache]: Analyzing trace with hash 189239994, now seen corresponding path program 9 times [2024-06-28 03:29:39,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:39,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333034553] [2024-06-28 03:29:39,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:39,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:40,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:40,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333034553] [2024-06-28 03:29:40,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333034553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:40,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:40,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:40,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960897464] [2024-06-28 03:29:40,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:40,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:40,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:40,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:40,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:40,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:40,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 391 transitions, 5353 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:40,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:40,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:40,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:41,189 INFO L124 PetriNetUnfolderBase]: 3431/5134 cut-off events. [2024-06-28 03:29:41,190 INFO L125 PetriNetUnfolderBase]: For 182100/182100 co-relation queries the response was YES. [2024-06-28 03:29:41,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40338 conditions, 5134 events. 3431/5134 cut-off events. For 182100/182100 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 26197 event pairs, 1199 based on Foata normal form. 8/5141 useless extension candidates. Maximal degree in co-relation 40252. Up to 4867 conditions per place. [2024-06-28 03:29:41,237 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 392 selfloop transitions, 32 changer transitions 0/428 dead transitions. [2024-06-28 03:29:41,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 428 transitions, 6558 flow [2024-06-28 03:29:41,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:29:41,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:29:41,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:29:41,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 03:29:41,240 INFO L175 Difference]: Start difference. First operand has 190 places, 391 transitions, 5353 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:29:41,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 428 transitions, 6558 flow [2024-06-28 03:29:41,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 428 transitions, 6433 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-28 03:29:41,421 INFO L231 Difference]: Finished difference. Result has 192 places, 399 transitions, 5456 flow [2024-06-28 03:29:41,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5228, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5456, PETRI_PLACES=192, PETRI_TRANSITIONS=399} [2024-06-28 03:29:41,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-28 03:29:41,422 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 399 transitions, 5456 flow [2024-06-28 03:29:41,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:41,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:41,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:41,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 03:29:41,422 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)] === [2024-06-28 03:29:41,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:41,423 INFO L85 PathProgramCache]: Analyzing trace with hash 181882764, now seen corresponding path program 10 times [2024-06-28 03:29:41,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:41,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694708257] [2024-06-28 03:29:41,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:41,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:42,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:42,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694708257] [2024-06-28 03:29:42,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694708257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:42,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:42,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:42,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746799770] [2024-06-28 03:29:42,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:42,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:42,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:42,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:42,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:42,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:42,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 399 transitions, 5456 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:42,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:42,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:42,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:43,117 INFO L124 PetriNetUnfolderBase]: 3411/5106 cut-off events. [2024-06-28 03:29:43,117 INFO L125 PetriNetUnfolderBase]: For 188534/188534 co-relation queries the response was YES. [2024-06-28 03:29:43,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40271 conditions, 5106 events. 3411/5106 cut-off events. For 188534/188534 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 25986 event pairs, 1163 based on Foata normal form. 10/5115 useless extension candidates. Maximal degree in co-relation 40184. Up to 4562 conditions per place. [2024-06-28 03:29:43,167 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 361 selfloop transitions, 70 changer transitions 0/435 dead transitions. [2024-06-28 03:29:43,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 435 transitions, 6721 flow [2024-06-28 03:29:43,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:29:43,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:29:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 03:29:43,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-28 03:29:43,169 INFO L175 Difference]: Start difference. First operand has 192 places, 399 transitions, 5456 flow. Second operand 8 states and 154 transitions. [2024-06-28 03:29:43,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 435 transitions, 6721 flow [2024-06-28 03:29:43,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 435 transitions, 6534 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-28 03:29:43,385 INFO L231 Difference]: Finished difference. Result has 194 places, 399 transitions, 5425 flow [2024-06-28 03:29:43,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5269, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5425, PETRI_PLACES=194, PETRI_TRANSITIONS=399} [2024-06-28 03:29:43,385 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-28 03:29:43,385 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 399 transitions, 5425 flow [2024-06-28 03:29:43,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:43,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:43,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:43,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 03:29:43,386 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)] === [2024-06-28 03:29:43,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:43,386 INFO L85 PathProgramCache]: Analyzing trace with hash -203925216, now seen corresponding path program 1 times [2024-06-28 03:29:43,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:43,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818250394] [2024-06-28 03:29:43,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:43,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:43,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:43,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818250394] [2024-06-28 03:29:43,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818250394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:43,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:43,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:29:43,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292908073] [2024-06-28 03:29:43,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:43,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:29:43,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:43,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:29:43,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:29:44,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:44,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 399 transitions, 5425 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:44,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:44,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:44,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:44,973 INFO L124 PetriNetUnfolderBase]: 3408/5029 cut-off events. [2024-06-28 03:29:44,973 INFO L125 PetriNetUnfolderBase]: For 217031/217193 co-relation queries the response was YES. [2024-06-28 03:29:45,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40934 conditions, 5029 events. 3408/5029 cut-off events. For 217031/217193 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 25212 event pairs, 1258 based on Foata normal form. 63/5067 useless extension candidates. Maximal degree in co-relation 40846. Up to 4847 conditions per place. [2024-06-28 03:29:45,025 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 376 selfloop transitions, 12 changer transitions 0/410 dead transitions. [2024-06-28 03:29:45,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 410 transitions, 6257 flow [2024-06-28 03:29:45,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:29:45,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:29:45,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-28 03:29:45,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-28 03:29:45,026 INFO L175 Difference]: Start difference. First operand has 194 places, 399 transitions, 5425 flow. Second operand 6 states and 101 transitions. [2024-06-28 03:29:45,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 410 transitions, 6257 flow [2024-06-28 03:29:45,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 410 transitions, 6093 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 03:29:45,251 INFO L231 Difference]: Finished difference. Result has 193 places, 402 transitions, 5323 flow [2024-06-28 03:29:45,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5261, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5323, PETRI_PLACES=193, PETRI_TRANSITIONS=402} [2024-06-28 03:29:45,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-28 03:29:45,252 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 402 transitions, 5323 flow [2024-06-28 03:29:45,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:45,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:45,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:45,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 03:29:45,253 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)] === [2024-06-28 03:29:45,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:45,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1460563919, now seen corresponding path program 1 times [2024-06-28 03:29:45,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:45,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047295102] [2024-06-28 03:29:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:45,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:45,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:45,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047295102] [2024-06-28 03:29:45,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047295102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:45,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:45,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:45,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112885996] [2024-06-28 03:29:45,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:45,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:45,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:45,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:45,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:45,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:45,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 402 transitions, 5323 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:45,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:45,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:45,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:46,973 INFO L124 PetriNetUnfolderBase]: 3556/5299 cut-off events. [2024-06-28 03:29:46,974 INFO L125 PetriNetUnfolderBase]: For 230951/230957 co-relation queries the response was YES. [2024-06-28 03:29:47,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43335 conditions, 5299 events. 3556/5299 cut-off events. For 230951/230957 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 27059 event pairs, 878 based on Foata normal form. 10/5308 useless extension candidates. Maximal degree in co-relation 43247. Up to 4817 conditions per place. [2024-06-28 03:29:47,024 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 379 selfloop transitions, 68 changer transitions 0/452 dead transitions. [2024-06-28 03:29:47,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 452 transitions, 6847 flow [2024-06-28 03:29:47,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:29:47,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:29:47,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-28 03:29:47,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-28 03:29:47,026 INFO L175 Difference]: Start difference. First operand has 193 places, 402 transitions, 5323 flow. Second operand 10 states and 186 transitions. [2024-06-28 03:29:47,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 452 transitions, 6847 flow [2024-06-28 03:29:47,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 452 transitions, 6807 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 03:29:47,253 INFO L231 Difference]: Finished difference. Result has 201 places, 412 transitions, 5739 flow [2024-06-28 03:29:47,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5283, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5739, PETRI_PLACES=201, PETRI_TRANSITIONS=412} [2024-06-28 03:29:47,253 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-28 03:29:47,254 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 412 transitions, 5739 flow [2024-06-28 03:29:47,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:47,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:47,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:47,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 03:29:47,254 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)] === [2024-06-28 03:29:47,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:47,254 INFO L85 PathProgramCache]: Analyzing trace with hash 2016995583, now seen corresponding path program 2 times [2024-06-28 03:29:47,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:47,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073108954] [2024-06-28 03:29:47,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:47,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:47,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:47,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073108954] [2024-06-28 03:29:47,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073108954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:47,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:47,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:47,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267748997] [2024-06-28 03:29:47,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:47,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:47,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:47,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:47,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:48,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:48,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 412 transitions, 5739 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:48,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:48,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:48,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:49,135 INFO L124 PetriNetUnfolderBase]: 3702/5532 cut-off events. [2024-06-28 03:29:49,135 INFO L125 PetriNetUnfolderBase]: For 258180/258186 co-relation queries the response was YES. [2024-06-28 03:29:49,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46619 conditions, 5532 events. 3702/5532 cut-off events. For 258180/258186 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28614 event pairs, 1058 based on Foata normal form. 12/5543 useless extension candidates. Maximal degree in co-relation 46528. Up to 5035 conditions per place. [2024-06-28 03:29:49,191 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 386 selfloop transitions, 91 changer transitions 0/482 dead transitions. [2024-06-28 03:29:49,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 482 transitions, 7634 flow [2024-06-28 03:29:49,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:29:49,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:29:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-28 03:29:49,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-28 03:29:49,192 INFO L175 Difference]: Start difference. First operand has 201 places, 412 transitions, 5739 flow. Second operand 11 states and 203 transitions. [2024-06-28 03:29:49,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 482 transitions, 7634 flow [2024-06-28 03:29:49,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 482 transitions, 7193 flow, removed 184 selfloop flow, removed 4 redundant places. [2024-06-28 03:29:49,464 INFO L231 Difference]: Finished difference. Result has 211 places, 440 transitions, 6219 flow [2024-06-28 03:29:49,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5525, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6219, PETRI_PLACES=211, PETRI_TRANSITIONS=440} [2024-06-28 03:29:49,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-28 03:29:49,465 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 440 transitions, 6219 flow [2024-06-28 03:29:49,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:49,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:49,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:49,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 03:29:49,465 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)] === [2024-06-28 03:29:49,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:49,466 INFO L85 PathProgramCache]: Analyzing trace with hash 2046638527, now seen corresponding path program 1 times [2024-06-28 03:29:49,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:49,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037219742] [2024-06-28 03:29:49,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:49,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:50,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:50,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:50,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037219742] [2024-06-28 03:29:50,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037219742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:50,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:50,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:50,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789231347] [2024-06-28 03:29:50,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:50,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:50,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:50,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:50,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:50,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:50,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 440 transitions, 6219 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:50,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:50,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:50,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:51,503 INFO L124 PetriNetUnfolderBase]: 3927/5843 cut-off events. [2024-06-28 03:29:51,503 INFO L125 PetriNetUnfolderBase]: For 276505/276515 co-relation queries the response was YES. [2024-06-28 03:29:51,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49617 conditions, 5843 events. 3927/5843 cut-off events. For 276505/276515 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 30437 event pairs, 1026 based on Foata normal form. 8/5838 useless extension candidates. Maximal degree in co-relation 49521. Up to 4721 conditions per place. [2024-06-28 03:29:51,565 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 381 selfloop transitions, 142 changer transitions 0/528 dead transitions. [2024-06-28 03:29:51,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 528 transitions, 8703 flow [2024-06-28 03:29:51,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:29:51,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:29:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-28 03:29:51,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47835497835497837 [2024-06-28 03:29:51,567 INFO L175 Difference]: Start difference. First operand has 211 places, 440 transitions, 6219 flow. Second operand 11 states and 221 transitions. [2024-06-28 03:29:51,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 528 transitions, 8703 flow [2024-06-28 03:29:51,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 528 transitions, 8548 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-28 03:29:51,963 INFO L231 Difference]: Finished difference. Result has 220 places, 469 transitions, 6905 flow [2024-06-28 03:29:51,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6064, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6905, PETRI_PLACES=220, PETRI_TRANSITIONS=469} [2024-06-28 03:29:51,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-28 03:29:51,963 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 469 transitions, 6905 flow [2024-06-28 03:29:51,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:51,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:51,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:51,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 03:29:51,964 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)] === [2024-06-28 03:29:51,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:51,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2046634683, now seen corresponding path program 3 times [2024-06-28 03:29:51,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:51,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113210930] [2024-06-28 03:29:51,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:51,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:52,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:52,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113210930] [2024-06-28 03:29:52,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113210930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:52,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:52,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:52,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617522724] [2024-06-28 03:29:52,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:52,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:52,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:52,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:52,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:52,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:52,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 469 transitions, 6905 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:52,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:52,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:52,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:54,000 INFO L124 PetriNetUnfolderBase]: 3913/5833 cut-off events. [2024-06-28 03:29:54,001 INFO L125 PetriNetUnfolderBase]: For 291666/291670 co-relation queries the response was YES. [2024-06-28 03:29:54,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50989 conditions, 5833 events. 3913/5833 cut-off events. For 291666/291670 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 30369 event pairs, 1102 based on Foata normal form. 8/5835 useless extension candidates. Maximal degree in co-relation 50890. Up to 5418 conditions per place. [2024-06-28 03:29:54,064 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 419 selfloop transitions, 84 changer transitions 0/508 dead transitions. [2024-06-28 03:29:54,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 508 transitions, 8161 flow [2024-06-28 03:29:54,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:29:54,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:29:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-28 03:29:54,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:29:54,065 INFO L175 Difference]: Start difference. First operand has 220 places, 469 transitions, 6905 flow. Second operand 11 states and 198 transitions. [2024-06-28 03:29:54,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 508 transitions, 8161 flow [2024-06-28 03:29:54,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 508 transitions, 8016 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-06-28 03:29:54,461 INFO L231 Difference]: Finished difference. Result has 229 places, 472 transitions, 7029 flow [2024-06-28 03:29:54,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6768, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7029, PETRI_PLACES=229, PETRI_TRANSITIONS=472} [2024-06-28 03:29:54,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-28 03:29:54,462 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 472 transitions, 7029 flow [2024-06-28 03:29:54,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:54,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:54,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:54,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 03:29:54,462 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)] === [2024-06-28 03:29:54,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:54,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1038231327, now seen corresponding path program 4 times [2024-06-28 03:29:54,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:54,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112818305] [2024-06-28 03:29:54,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:54,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:55,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:55,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112818305] [2024-06-28 03:29:55,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112818305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:55,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:55,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:29:55,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535602266] [2024-06-28 03:29:55,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:55,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:29:55,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:55,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:29:55,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:29:55,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:55,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 472 transitions, 7029 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:29:55,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:55,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:55,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:56,969 INFO L124 PetriNetUnfolderBase]: 4115/6147 cut-off events. [2024-06-28 03:29:56,969 INFO L125 PetriNetUnfolderBase]: For 314162/314166 co-relation queries the response was YES. [2024-06-28 03:29:57,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53989 conditions, 6147 events. 4115/6147 cut-off events. For 314162/314166 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 32480 event pairs, 1084 based on Foata normal form. 8/6149 useless extension candidates. Maximal degree in co-relation 53888. Up to 5675 conditions per place. [2024-06-28 03:29:57,034 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 457 selfloop transitions, 89 changer transitions 0/551 dead transitions. [2024-06-28 03:29:57,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 551 transitions, 9140 flow [2024-06-28 03:29:57,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:29:57,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:29:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-28 03:29:57,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-28 03:29:57,036 INFO L175 Difference]: Start difference. First operand has 229 places, 472 transitions, 7029 flow. Second operand 11 states and 201 transitions. [2024-06-28 03:29:57,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 551 transitions, 9140 flow [2024-06-28 03:29:57,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 551 transitions, 8757 flow, removed 89 selfloop flow, removed 9 redundant places. [2024-06-28 03:29:57,455 INFO L231 Difference]: Finished difference. Result has 233 places, 507 transitions, 7634 flow [2024-06-28 03:29:57,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6737, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7634, PETRI_PLACES=233, PETRI_TRANSITIONS=507} [2024-06-28 03:29:57,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-28 03:29:57,456 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 507 transitions, 7634 flow [2024-06-28 03:29:57,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:29:57,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:57,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:57,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 03:29:57,457 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)] === [2024-06-28 03:29:57,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:57,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1038170877, now seen corresponding path program 5 times [2024-06-28 03:29:57,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:57,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110115582] [2024-06-28 03:29:57,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:57,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:58,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:58,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110115582] [2024-06-28 03:29:58,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110115582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:58,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:58,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:29:58,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732429139] [2024-06-28 03:29:58,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:58,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:29:58,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:58,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:29:58,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:29:58,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:58,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 507 transitions, 7634 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:29:58,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:58,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:58,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:59,926 INFO L124 PetriNetUnfolderBase]: 4097/6123 cut-off events. [2024-06-28 03:29:59,926 INFO L125 PetriNetUnfolderBase]: For 320919/320923 co-relation queries the response was YES. [2024-06-28 03:29:59,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53778 conditions, 6123 events. 4097/6123 cut-off events. For 320919/320923 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 32378 event pairs, 1102 based on Foata normal form. 10/6127 useless extension candidates. Maximal degree in co-relation 53675. Up to 5756 conditions per place. [2024-06-28 03:29:59,995 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 464 selfloop transitions, 77 changer transitions 0/546 dead transitions. [2024-06-28 03:29:59,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 546 transitions, 8901 flow [2024-06-28 03:29:59,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:29:59,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:29:59,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-28 03:30:00,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-28 03:30:00,010 INFO L175 Difference]: Start difference. First operand has 233 places, 507 transitions, 7634 flow. Second operand 11 states and 196 transitions. [2024-06-28 03:30:00,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 546 transitions, 8901 flow [2024-06-28 03:30:00,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 546 transitions, 8616 flow, removed 132 selfloop flow, removed 3 redundant places. [2024-06-28 03:30:00,503 INFO L231 Difference]: Finished difference. Result has 242 places, 509 transitions, 7558 flow [2024-06-28 03:30:00,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7349, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7558, PETRI_PLACES=242, PETRI_TRANSITIONS=509} [2024-06-28 03:30:00,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-28 03:30:00,504 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 509 transitions, 7558 flow [2024-06-28 03:30:00,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:00,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:00,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:00,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 03:30:00,505 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:00,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:00,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1038170753, now seen corresponding path program 2 times [2024-06-28 03:30:00,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:00,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480113605] [2024-06-28 03:30:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:00,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:01,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:01,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480113605] [2024-06-28 03:30:01,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480113605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:01,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:01,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:01,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973380359] [2024-06-28 03:30:01,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:01,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:01,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:01,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:01,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:01,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:01,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 509 transitions, 7558 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:01,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:01,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:01,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:03,031 INFO L124 PetriNetUnfolderBase]: 4279/6383 cut-off events. [2024-06-28 03:30:03,031 INFO L125 PetriNetUnfolderBase]: For 340421/340425 co-relation queries the response was YES. [2024-06-28 03:30:03,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56181 conditions, 6383 events. 4279/6383 cut-off events. For 340421/340425 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 34080 event pairs, 1084 based on Foata normal form. 12/6389 useless extension candidates. Maximal degree in co-relation 56075. Up to 5621 conditions per place. [2024-06-28 03:30:03,100 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 434 selfloop transitions, 149 changer transitions 0/588 dead transitions. [2024-06-28 03:30:03,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 588 transitions, 9838 flow [2024-06-28 03:30:03,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:30:03,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:30:03,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-28 03:30:03,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4623015873015873 [2024-06-28 03:30:03,102 INFO L175 Difference]: Start difference. First operand has 242 places, 509 transitions, 7558 flow. Second operand 12 states and 233 transitions. [2024-06-28 03:30:03,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 588 transitions, 9838 flow [2024-06-28 03:30:03,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 588 transitions, 9682 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-28 03:30:03,626 INFO L231 Difference]: Finished difference. Result has 247 places, 537 transitions, 8260 flow [2024-06-28 03:30:03,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7402, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8260, PETRI_PLACES=247, PETRI_TRANSITIONS=537} [2024-06-28 03:30:03,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-28 03:30:03,626 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 537 transitions, 8260 flow [2024-06-28 03:30:03,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:03,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:03,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:03,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 03:30:03,627 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:03,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:03,627 INFO L85 PathProgramCache]: Analyzing trace with hash -920078423, now seen corresponding path program 3 times [2024-06-28 03:30:03,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:03,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181903273] [2024-06-28 03:30:03,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:03,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:04,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:04,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181903273] [2024-06-28 03:30:04,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181903273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:04,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:04,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:04,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128556499] [2024-06-28 03:30:04,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:04,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:04,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:04,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:04,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:04,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:04,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 537 transitions, 8260 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:04,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:04,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:04,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:06,213 INFO L124 PetriNetUnfolderBase]: 4325/6446 cut-off events. [2024-06-28 03:30:06,214 INFO L125 PetriNetUnfolderBase]: For 363169/363181 co-relation queries the response was YES. [2024-06-28 03:30:06,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58089 conditions, 6446 events. 4325/6446 cut-off events. For 363169/363181 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 34472 event pairs, 1018 based on Foata normal form. 12/6452 useless extension candidates. Maximal degree in co-relation 57980. Up to 5148 conditions per place. [2024-06-28 03:30:06,290 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 414 selfloop transitions, 200 changer transitions 0/619 dead transitions. [2024-06-28 03:30:06,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 619 transitions, 10571 flow [2024-06-28 03:30:06,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:30:06,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:30:06,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-28 03:30:06,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-28 03:30:06,292 INFO L175 Difference]: Start difference. First operand has 247 places, 537 transitions, 8260 flow. Second operand 10 states and 204 transitions. [2024-06-28 03:30:06,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 619 transitions, 10571 flow [2024-06-28 03:30:06,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 619 transitions, 10303 flow, removed 89 selfloop flow, removed 5 redundant places. [2024-06-28 03:30:06,913 INFO L231 Difference]: Finished difference. Result has 252 places, 541 transitions, 8513 flow [2024-06-28 03:30:06,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7992, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8513, PETRI_PLACES=252, PETRI_TRANSITIONS=541} [2024-06-28 03:30:06,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-28 03:30:06,914 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 541 transitions, 8513 flow [2024-06-28 03:30:06,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:06,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:06,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:06,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 03:30:06,915 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:06,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:06,915 INFO L85 PathProgramCache]: Analyzing trace with hash -920083197, now seen corresponding path program 6 times [2024-06-28 03:30:06,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:06,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900661891] [2024-06-28 03:30:06,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:06,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:07,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:07,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900661891] [2024-06-28 03:30:07,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900661891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:07,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:07,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:07,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455665273] [2024-06-28 03:30:07,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:07,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:07,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:07,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:07,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:07,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:07,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 541 transitions, 8513 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:07,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:07,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:07,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:09,483 INFO L124 PetriNetUnfolderBase]: 4330/6455 cut-off events. [2024-06-28 03:30:09,483 INFO L125 PetriNetUnfolderBase]: For 378920/378934 co-relation queries the response was YES. [2024-06-28 03:30:09,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59648 conditions, 6455 events. 4330/6455 cut-off events. For 378920/378934 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34337 event pairs, 1090 based on Foata normal form. 14/6463 useless extension candidates. Maximal degree in co-relation 59537. Up to 6069 conditions per place. [2024-06-28 03:30:09,551 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 486 selfloop transitions, 87 changer transitions 0/578 dead transitions. [2024-06-28 03:30:09,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 578 transitions, 9966 flow [2024-06-28 03:30:09,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:30:09,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:30:09,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-28 03:30:09,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-28 03:30:09,558 INFO L175 Difference]: Start difference. First operand has 252 places, 541 transitions, 8513 flow. Second operand 10 states and 182 transitions. [2024-06-28 03:30:09,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 578 transitions, 9966 flow [2024-06-28 03:30:10,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 578 transitions, 9475 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-28 03:30:10,161 INFO L231 Difference]: Finished difference. Result has 254 places, 543 transitions, 8307 flow [2024-06-28 03:30:10,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8022, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8307, PETRI_PLACES=254, PETRI_TRANSITIONS=543} [2024-06-28 03:30:10,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-28 03:30:10,162 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 543 transitions, 8307 flow [2024-06-28 03:30:10,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:10,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:10,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:10,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 03:30:10,163 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)] === [2024-06-28 03:30:10,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:10,163 INFO L85 PathProgramCache]: Analyzing trace with hash -689036827, now seen corresponding path program 4 times [2024-06-28 03:30:10,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:10,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241284605] [2024-06-28 03:30:10,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:10,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:11,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:11,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241284605] [2024-06-28 03:30:11,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241284605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:11,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:11,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:11,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747137883] [2024-06-28 03:30:11,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:11,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:11,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:11,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:11,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:11,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:11,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 543 transitions, 8307 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:11,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:11,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:11,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:12,840 INFO L124 PetriNetUnfolderBase]: 4434/6604 cut-off events. [2024-06-28 03:30:12,840 INFO L125 PetriNetUnfolderBase]: For 403508/403522 co-relation queries the response was YES. [2024-06-28 03:30:12,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60697 conditions, 6604 events. 4434/6604 cut-off events. For 403508/403522 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 35435 event pairs, 1021 based on Foata normal form. 12/6610 useless extension candidates. Maximal degree in co-relation 60585. Up to 5202 conditions per place. [2024-06-28 03:30:12,918 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 421 selfloop transitions, 206 changer transitions 0/632 dead transitions. [2024-06-28 03:30:12,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 632 transitions, 10988 flow [2024-06-28 03:30:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:30:12,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:30:12,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-28 03:30:12,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-06-28 03:30:12,919 INFO L175 Difference]: Start difference. First operand has 254 places, 543 transitions, 8307 flow. Second operand 10 states and 207 transitions. [2024-06-28 03:30:12,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 632 transitions, 10988 flow [2024-06-28 03:30:13,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 632 transitions, 10721 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-28 03:30:13,441 INFO L231 Difference]: Finished difference. Result has 257 places, 551 transitions, 8690 flow [2024-06-28 03:30:13,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8040, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8690, PETRI_PLACES=257, PETRI_TRANSITIONS=551} [2024-06-28 03:30:13,442 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-28 03:30:13,442 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 551 transitions, 8690 flow [2024-06-28 03:30:13,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:13,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:13,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:13,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 03:30:13,443 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:13,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:13,443 INFO L85 PathProgramCache]: Analyzing trace with hash 794275741, now seen corresponding path program 5 times [2024-06-28 03:30:13,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:13,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497016384] [2024-06-28 03:30:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:13,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:14,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:14,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497016384] [2024-06-28 03:30:14,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497016384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:14,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:14,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:14,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896672083] [2024-06-28 03:30:14,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:14,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:14,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:14,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:14,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:14,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:14,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 551 transitions, 8690 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:14,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:14,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:14,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:15,982 INFO L124 PetriNetUnfolderBase]: 4438/6610 cut-off events. [2024-06-28 03:30:15,982 INFO L125 PetriNetUnfolderBase]: For 423285/423299 co-relation queries the response was YES. [2024-06-28 03:30:16,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62284 conditions, 6610 events. 4438/6610 cut-off events. For 423285/423299 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 35457 event pairs, 992 based on Foata normal form. 12/6616 useless extension candidates. Maximal degree in co-relation 62170. Up to 5312 conditions per place. [2024-06-28 03:30:16,053 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 410 selfloop transitions, 218 changer transitions 0/633 dead transitions. [2024-06-28 03:30:16,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 633 transitions, 11003 flow [2024-06-28 03:30:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:30:16,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:30:16,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-28 03:30:16,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-28 03:30:16,055 INFO L175 Difference]: Start difference. First operand has 257 places, 551 transitions, 8690 flow. Second operand 10 states and 203 transitions. [2024-06-28 03:30:16,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 633 transitions, 11003 flow [2024-06-28 03:30:16,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 633 transitions, 10610 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-28 03:30:16,578 INFO L231 Difference]: Finished difference. Result has 261 places, 555 transitions, 8875 flow [2024-06-28 03:30:16,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8319, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8875, PETRI_PLACES=261, PETRI_TRANSITIONS=555} [2024-06-28 03:30:16,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-28 03:30:16,579 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 555 transitions, 8875 flow [2024-06-28 03:30:16,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:16,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:16,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:16,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 03:30:16,580 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:16,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:16,580 INFO L85 PathProgramCache]: Analyzing trace with hash -919898499, now seen corresponding path program 1 times [2024-06-28 03:30:16,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:16,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740522704] [2024-06-28 03:30:16,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:16,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:17,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:17,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740522704] [2024-06-28 03:30:17,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740522704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:17,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:17,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:17,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863267674] [2024-06-28 03:30:17,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:17,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:17,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:17,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:17,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:17,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:17,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 555 transitions, 8875 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:17,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:17,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:17,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:19,255 INFO L124 PetriNetUnfolderBase]: 4498/6698 cut-off events. [2024-06-28 03:30:19,255 INFO L125 PetriNetUnfolderBase]: For 441196/441208 co-relation queries the response was YES. [2024-06-28 03:30:19,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64085 conditions, 6698 events. 4498/6698 cut-off events. For 441196/441208 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 35993 event pairs, 1105 based on Foata normal form. 10/6702 useless extension candidates. Maximal degree in co-relation 63969. Up to 6132 conditions per place. [2024-06-28 03:30:19,344 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 522 selfloop transitions, 90 changer transitions 0/617 dead transitions. [2024-06-28 03:30:19,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 617 transitions, 10987 flow [2024-06-28 03:30:19,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:30:19,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:30:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-28 03:30:19,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-28 03:30:19,351 INFO L175 Difference]: Start difference. First operand has 261 places, 555 transitions, 8875 flow. Second operand 9 states and 181 transitions. [2024-06-28 03:30:19,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 617 transitions, 10987 flow [2024-06-28 03:30:19,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 617 transitions, 10464 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-28 03:30:19,910 INFO L231 Difference]: Finished difference. Result has 263 places, 575 transitions, 8891 flow [2024-06-28 03:30:19,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8358, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8891, PETRI_PLACES=263, PETRI_TRANSITIONS=575} [2024-06-28 03:30:19,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-28 03:30:19,911 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 575 transitions, 8891 flow [2024-06-28 03:30:19,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:19,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:19,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:19,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 03:30:19,912 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)] === [2024-06-28 03:30:19,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:19,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1763874165, now seen corresponding path program 1 times [2024-06-28 03:30:19,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:19,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019147902] [2024-06-28 03:30:19,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:19,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:20,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:20,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019147902] [2024-06-28 03:30:20,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019147902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:20,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:20,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:30:20,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340124822] [2024-06-28 03:30:20,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:20,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:30:20,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:20,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:30:20,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:30:20,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:30:20,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 575 transitions, 8891 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:20,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:20,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:30:20,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:21,989 INFO L124 PetriNetUnfolderBase]: 4265/6427 cut-off events. [2024-06-28 03:30:21,989 INFO L125 PetriNetUnfolderBase]: For 448342/448471 co-relation queries the response was YES. [2024-06-28 03:30:22,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61573 conditions, 6427 events. 4265/6427 cut-off events. For 448342/448471 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 35156 event pairs, 1080 based on Foata normal form. 20/6420 useless extension candidates. Maximal degree in co-relation 61455. Up to 6017 conditions per place. [2024-06-28 03:30:22,076 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 505 selfloop transitions, 56 changer transitions 0/593 dead transitions. [2024-06-28 03:30:22,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 593 transitions, 10183 flow [2024-06-28 03:30:22,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:30:22,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:30:22,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-28 03:30:22,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:30:22,078 INFO L175 Difference]: Start difference. First operand has 263 places, 575 transitions, 8891 flow. Second operand 7 states and 133 transitions. [2024-06-28 03:30:22,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 593 transitions, 10183 flow [2024-06-28 03:30:22,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 593 transitions, 9626 flow, removed 105 selfloop flow, removed 9 redundant places. [2024-06-28 03:30:22,798 INFO L231 Difference]: Finished difference. Result has 261 places, 575 transitions, 8471 flow [2024-06-28 03:30:22,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8334, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8471, PETRI_PLACES=261, PETRI_TRANSITIONS=575} [2024-06-28 03:30:22,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-28 03:30:22,798 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 575 transitions, 8471 flow [2024-06-28 03:30:22,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:22,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:22,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:22,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 03:30:22,799 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:22,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:22,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1494419479, now seen corresponding path program 7 times [2024-06-28 03:30:22,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:22,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836862594] [2024-06-28 03:30:22,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:22,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:23,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:23,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836862594] [2024-06-28 03:30:23,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836862594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:23,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:23,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:23,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829511782] [2024-06-28 03:30:23,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:23,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:23,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:23,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:23,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:23,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:23,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 575 transitions, 8471 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:23,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:23,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:23,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:25,500 INFO L124 PetriNetUnfolderBase]: 4502/6717 cut-off events. [2024-06-28 03:30:25,501 INFO L125 PetriNetUnfolderBase]: For 468238/468251 co-relation queries the response was YES. [2024-06-28 03:30:25,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62894 conditions, 6717 events. 4502/6717 cut-off events. For 468238/468251 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 36212 event pairs, 928 based on Foata normal form. 14/6725 useless extension candidates. Maximal degree in co-relation 62779. Up to 5890 conditions per place. [2024-06-28 03:30:25,585 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 465 selfloop transitions, 150 changer transitions 0/620 dead transitions. [2024-06-28 03:30:25,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 620 transitions, 10249 flow [2024-06-28 03:30:25,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:30:25,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:30:25,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-28 03:30:25,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 03:30:25,596 INFO L175 Difference]: Start difference. First operand has 261 places, 575 transitions, 8471 flow. Second operand 10 states and 185 transitions. [2024-06-28 03:30:25,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 620 transitions, 10249 flow [2024-06-28 03:30:26,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 620 transitions, 10107 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 03:30:26,385 INFO L231 Difference]: Finished difference. Result has 265 places, 579 transitions, 8804 flow [2024-06-28 03:30:26,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8329, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8804, PETRI_PLACES=265, PETRI_TRANSITIONS=579} [2024-06-28 03:30:26,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-28 03:30:26,386 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 579 transitions, 8804 flow [2024-06-28 03:30:26,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:26,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:26,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:26,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 03:30:26,387 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:26,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:26,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1494358905, now seen corresponding path program 6 times [2024-06-28 03:30:26,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:26,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693794979] [2024-06-28 03:30:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:26,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:27,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:27,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:27,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693794979] [2024-06-28 03:30:27,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693794979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:27,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:27,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:27,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121822061] [2024-06-28 03:30:27,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:27,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:27,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:27,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:27,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:27,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:27,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 579 transitions, 8804 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:27,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:27,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:27,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:29,201 INFO L124 PetriNetUnfolderBase]: 4528/6759 cut-off events. [2024-06-28 03:30:29,201 INFO L125 PetriNetUnfolderBase]: For 484917/484927 co-relation queries the response was YES. [2024-06-28 03:30:29,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64037 conditions, 6759 events. 4528/6759 cut-off events. For 484917/484927 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 36450 event pairs, 1026 based on Foata normal form. 12/6758 useless extension candidates. Maximal degree in co-relation 63921. Up to 5488 conditions per place. [2024-06-28 03:30:29,275 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 397 selfloop transitions, 237 changer transitions 0/639 dead transitions. [2024-06-28 03:30:29,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 639 transitions, 11040 flow [2024-06-28 03:30:29,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:30:29,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:30:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-28 03:30:29,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-28 03:30:29,276 INFO L175 Difference]: Start difference. First operand has 265 places, 579 transitions, 8804 flow. Second operand 11 states and 216 transitions. [2024-06-28 03:30:29,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 639 transitions, 11040 flow [2024-06-28 03:30:29,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 639 transitions, 10656 flow, removed 75 selfloop flow, removed 8 redundant places. [2024-06-28 03:30:29,969 INFO L231 Difference]: Finished difference. Result has 269 places, 587 transitions, 9257 flow [2024-06-28 03:30:29,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8450, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9257, PETRI_PLACES=269, PETRI_TRANSITIONS=587} [2024-06-28 03:30:29,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-28 03:30:29,970 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 587 transitions, 9257 flow [2024-06-28 03:30:29,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:29,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:29,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:29,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 03:30:29,970 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:29,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:29,971 INFO L85 PathProgramCache]: Analyzing trace with hash -930781551, now seen corresponding path program 8 times [2024-06-28 03:30:29,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:29,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081342986] [2024-06-28 03:30:29,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:29,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:31,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:31,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081342986] [2024-06-28 03:30:31,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081342986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:31,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:31,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:31,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794351999] [2024-06-28 03:30:31,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:31,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:31,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:31,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:31,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:31,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:31,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 587 transitions, 9257 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:31,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:31,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:31,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:32,778 INFO L124 PetriNetUnfolderBase]: 4631/6935 cut-off events. [2024-06-28 03:30:32,779 INFO L125 PetriNetUnfolderBase]: For 455143/455149 co-relation queries the response was YES. [2024-06-28 03:30:32,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65269 conditions, 6935 events. 4631/6935 cut-off events. For 455143/455149 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 37896 event pairs, 1152 based on Foata normal form. 10/6939 useless extension candidates. Maximal degree in co-relation 65152. Up to 6393 conditions per place. [2024-06-28 03:30:32,864 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 518 selfloop transitions, 120 changer transitions 0/643 dead transitions. [2024-06-28 03:30:32,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 643 transitions, 11147 flow [2024-06-28 03:30:32,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:30:32,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:30:32,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-28 03:30:32,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-28 03:30:32,865 INFO L175 Difference]: Start difference. First operand has 269 places, 587 transitions, 9257 flow. Second operand 10 states and 182 transitions. [2024-06-28 03:30:32,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 643 transitions, 11147 flow [2024-06-28 03:30:33,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 643 transitions, 10634 flow, removed 99 selfloop flow, removed 7 redundant places. [2024-06-28 03:30:33,698 INFO L231 Difference]: Finished difference. Result has 272 places, 605 transitions, 9440 flow [2024-06-28 03:30:33,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8744, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9440, PETRI_PLACES=272, PETRI_TRANSITIONS=605} [2024-06-28 03:30:33,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-28 03:30:33,699 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 605 transitions, 9440 flow [2024-06-28 03:30:33,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:33,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:33,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:33,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 03:30:33,700 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:33,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:33,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1491562519, now seen corresponding path program 9 times [2024-06-28 03:30:33,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:33,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030021295] [2024-06-28 03:30:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:33,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:34,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:34,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030021295] [2024-06-28 03:30:34,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030021295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:34,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:34,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:34,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615029342] [2024-06-28 03:30:34,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:34,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:34,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:34,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:34,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:34,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:34,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 605 transitions, 9440 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:34,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:34,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:34,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:36,434 INFO L124 PetriNetUnfolderBase]: 4613/6898 cut-off events. [2024-06-28 03:30:36,434 INFO L125 PetriNetUnfolderBase]: For 437615/437621 co-relation queries the response was YES. [2024-06-28 03:30:36,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63632 conditions, 6898 events. 4613/6898 cut-off events. For 437615/437621 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 37552 event pairs, 1182 based on Foata normal form. 10/6902 useless extension candidates. Maximal degree in co-relation 63514. Up to 6451 conditions per place. [2024-06-28 03:30:36,521 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 542 selfloop transitions, 90 changer transitions 0/637 dead transitions. [2024-06-28 03:30:36,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 637 transitions, 10892 flow [2024-06-28 03:30:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:30:36,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:30:36,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 03:30:36,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:30:36,522 INFO L175 Difference]: Start difference. First operand has 272 places, 605 transitions, 9440 flow. Second operand 9 states and 162 transitions. [2024-06-28 03:30:36,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 637 transitions, 10892 flow [2024-06-28 03:30:37,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 637 transitions, 10380 flow, removed 159 selfloop flow, removed 7 redundant places. [2024-06-28 03:30:37,600 INFO L231 Difference]: Finished difference. Result has 274 places, 605 transitions, 9136 flow [2024-06-28 03:30:37,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8928, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9136, PETRI_PLACES=274, PETRI_TRANSITIONS=605} [2024-06-28 03:30:37,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-28 03:30:37,600 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 605 transitions, 9136 flow [2024-06-28 03:30:37,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:37,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:37,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:37,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 03:30:37,601 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:37,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:37,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1376266575, now seen corresponding path program 7 times [2024-06-28 03:30:37,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:37,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572905134] [2024-06-28 03:30:37,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:37,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:38,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:38,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572905134] [2024-06-28 03:30:38,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572905134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:38,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:38,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:38,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004853441] [2024-06-28 03:30:38,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:38,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:38,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:38,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:38,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:38,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:38,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 605 transitions, 9136 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:38,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:38,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:38,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:40,289 INFO L124 PetriNetUnfolderBase]: 4656/6969 cut-off events. [2024-06-28 03:30:40,289 INFO L125 PetriNetUnfolderBase]: For 445462/445472 co-relation queries the response was YES. [2024-06-28 03:30:40,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63916 conditions, 6969 events. 4656/6969 cut-off events. For 445462/445472 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 38011 event pairs, 1039 based on Foata normal form. 12/6980 useless extension candidates. Maximal degree in co-relation 63797. Up to 5329 conditions per place. [2024-06-28 03:30:40,372 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 393 selfloop transitions, 264 changer transitions 0/662 dead transitions. [2024-06-28 03:30:40,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 662 transitions, 11504 flow [2024-06-28 03:30:40,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:30:40,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:30:40,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-28 03:30:40,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-28 03:30:40,373 INFO L175 Difference]: Start difference. First operand has 274 places, 605 transitions, 9136 flow. Second operand 9 states and 184 transitions. [2024-06-28 03:30:40,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 662 transitions, 11504 flow [2024-06-28 03:30:41,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 662 transitions, 11240 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-28 03:30:41,037 INFO L231 Difference]: Finished difference. Result has 276 places, 612 transitions, 9710 flow [2024-06-28 03:30:41,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8872, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9710, PETRI_PLACES=276, PETRI_TRANSITIONS=612} [2024-06-28 03:30:41,038 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-28 03:30:41,038 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 612 transitions, 9710 flow [2024-06-28 03:30:41,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:41,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:41,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:41,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 03:30:41,039 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:41,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:41,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1376271225, now seen corresponding path program 8 times [2024-06-28 03:30:41,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:41,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145955746] [2024-06-28 03:30:41,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:41,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:41,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:41,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145955746] [2024-06-28 03:30:41,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145955746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:41,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:41,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:41,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426113] [2024-06-28 03:30:41,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:41,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:41,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:41,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:41,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:42,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:42,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 612 transitions, 9710 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:42,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:42,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:42,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:43,962 INFO L124 PetriNetUnfolderBase]: 4749/7101 cut-off events. [2024-06-28 03:30:43,962 INFO L125 PetriNetUnfolderBase]: For 482683/482693 co-relation queries the response was YES. [2024-06-28 03:30:44,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67997 conditions, 7101 events. 4749/7101 cut-off events. For 482683/482693 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 38797 event pairs, 1057 based on Foata normal form. 12/7112 useless extension candidates. Maximal degree in co-relation 67876. Up to 5232 conditions per place. [2024-06-28 03:30:44,072 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 391 selfloop transitions, 280 changer transitions 0/676 dead transitions. [2024-06-28 03:30:44,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 676 transitions, 12526 flow [2024-06-28 03:30:44,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:30:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:30:44,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-28 03:30:44,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-28 03:30:44,074 INFO L175 Difference]: Start difference. First operand has 276 places, 612 transitions, 9710 flow. Second operand 10 states and 204 transitions. [2024-06-28 03:30:44,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 676 transitions, 12526 flow [2024-06-28 03:30:44,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 676 transitions, 12221 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-28 03:30:44,828 INFO L231 Difference]: Finished difference. Result has 282 places, 620 transitions, 10271 flow [2024-06-28 03:30:44,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9405, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10271, PETRI_PLACES=282, PETRI_TRANSITIONS=620} [2024-06-28 03:30:44,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-28 03:30:44,829 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 620 transitions, 10271 flow [2024-06-28 03:30:44,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:44,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:44,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:44,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 03:30:44,829 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)] === [2024-06-28 03:30:44,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:44,830 INFO L85 PathProgramCache]: Analyzing trace with hash -812693871, now seen corresponding path program 10 times [2024-06-28 03:30:44,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:44,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787503344] [2024-06-28 03:30:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:44,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:45,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:45,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787503344] [2024-06-28 03:30:45,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787503344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:45,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:45,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:45,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809247656] [2024-06-28 03:30:45,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:45,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:45,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:45,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:45,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:46,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:46,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 620 transitions, 10271 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:46,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:46,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:46,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:47,699 INFO L124 PetriNetUnfolderBase]: 4755/7114 cut-off events. [2024-06-28 03:30:47,700 INFO L125 PetriNetUnfolderBase]: For 511664/511674 co-relation queries the response was YES. [2024-06-28 03:30:47,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70538 conditions, 7114 events. 4755/7114 cut-off events. For 511664/511674 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 38935 event pairs, 1117 based on Foata normal form. 14/7127 useless extension candidates. Maximal degree in co-relation 70414. Up to 6672 conditions per place. [2024-06-28 03:30:47,794 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 558 selfloop transitions, 90 changer transitions 0/653 dead transitions. [2024-06-28 03:30:47,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 653 transitions, 11900 flow [2024-06-28 03:30:47,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:30:47,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:30:47,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 03:30:47,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-28 03:30:47,796 INFO L175 Difference]: Start difference. First operand has 282 places, 620 transitions, 10271 flow. Second operand 9 states and 163 transitions. [2024-06-28 03:30:47,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 653 transitions, 11900 flow [2024-06-28 03:30:48,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 653 transitions, 11429 flow, removed 95 selfloop flow, removed 5 redundant places. [2024-06-28 03:30:48,625 INFO L231 Difference]: Finished difference. Result has 286 places, 622 transitions, 10112 flow [2024-06-28 03:30:48,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9804, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10112, PETRI_PLACES=286, PETRI_TRANSITIONS=622} [2024-06-28 03:30:48,625 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-28 03:30:48,625 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 622 transitions, 10112 flow [2024-06-28 03:30:48,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:48,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:48,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:48,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 03:30:48,626 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)] === [2024-06-28 03:30:48,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:48,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1376086651, now seen corresponding path program 2 times [2024-06-28 03:30:48,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:48,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462880378] [2024-06-28 03:30:48,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:48,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:49,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:49,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462880378] [2024-06-28 03:30:49,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462880378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:49,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:49,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:30:49,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584555310] [2024-06-28 03:30:49,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:49,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:30:49,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:49,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:30:49,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:30:49,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:49,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 622 transitions, 10112 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:49,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:49,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:49,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:51,171 INFO L124 PetriNetUnfolderBase]: 4787/7158 cut-off events. [2024-06-28 03:30:51,171 INFO L125 PetriNetUnfolderBase]: For 499358/499366 co-relation queries the response was YES. [2024-06-28 03:30:51,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70038 conditions, 7158 events. 4787/7158 cut-off events. For 499358/499366 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 39258 event pairs, 1115 based on Foata normal form. 10/7167 useless extension candidates. Maximal degree in co-relation 69912. Up to 6542 conditions per place. [2024-06-28 03:30:51,263 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 563 selfloop transitions, 94 changer transitions 0/662 dead transitions. [2024-06-28 03:30:51,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 662 transitions, 12060 flow [2024-06-28 03:30:51,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:30:51,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:30:51,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 03:30:51,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-28 03:30:51,264 INFO L175 Difference]: Start difference. First operand has 286 places, 622 transitions, 10112 flow. Second operand 8 states and 159 transitions. [2024-06-28 03:30:51,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 662 transitions, 12060 flow [2024-06-28 03:30:51,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 662 transitions, 11780 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-28 03:30:51,930 INFO L231 Difference]: Finished difference. Result has 287 places, 625 transitions, 10146 flow [2024-06-28 03:30:51,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9832, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10146, PETRI_PLACES=287, PETRI_TRANSITIONS=625} [2024-06-28 03:30:51,931 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-28 03:30:51,931 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 625 transitions, 10146 flow [2024-06-28 03:30:51,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:51,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:51,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:51,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 03:30:51,932 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)] === [2024-06-28 03:30:51,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:51,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1376093595, now seen corresponding path program 9 times [2024-06-28 03:30:51,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:51,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317227000] [2024-06-28 03:30:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:51,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:52,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:52,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317227000] [2024-06-28 03:30:52,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317227000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:52,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:52,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:52,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118449721] [2024-06-28 03:30:52,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:52,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:52,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:52,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:52,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:53,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:53,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 625 transitions, 10146 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:53,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:53,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:53,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:54,641 INFO L124 PetriNetUnfolderBase]: 4797/7177 cut-off events. [2024-06-28 03:30:54,642 INFO L125 PetriNetUnfolderBase]: For 508999/509009 co-relation queries the response was YES. [2024-06-28 03:30:54,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70498 conditions, 7177 events. 4797/7177 cut-off events. For 508999/509009 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 39356 event pairs, 991 based on Foata normal form. 12/7188 useless extension candidates. Maximal degree in co-relation 70371. Up to 5537 conditions per place. [2024-06-28 03:30:54,725 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 388 selfloop transitions, 287 changer transitions 0/680 dead transitions. [2024-06-28 03:30:54,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 680 transitions, 12455 flow [2024-06-28 03:30:54,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:30:54,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:30:54,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-28 03:30:54,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-28 03:30:54,726 INFO L175 Difference]: Start difference. First operand has 287 places, 625 transitions, 10146 flow. Second operand 9 states and 183 transitions. [2024-06-28 03:30:54,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 680 transitions, 12455 flow [2024-06-28 03:30:55,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 680 transitions, 12183 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-28 03:30:55,458 INFO L231 Difference]: Finished difference. Result has 290 places, 629 transitions, 10599 flow [2024-06-28 03:30:55,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9874, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10599, PETRI_PLACES=290, PETRI_TRANSITIONS=629} [2024-06-28 03:30:55,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-28 03:30:55,459 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 629 transitions, 10599 flow [2024-06-28 03:30:55,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:55,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:55,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:55,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 03:30:55,460 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:55,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:55,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1741130063, now seen corresponding path program 2 times [2024-06-28 03:30:55,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:55,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772634144] [2024-06-28 03:30:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:55,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:56,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:56,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772634144] [2024-06-28 03:30:56,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772634144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:56,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:56,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:30:56,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059598751] [2024-06-28 03:30:56,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:56,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:30:56,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:56,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:30:56,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:30:56,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:30:56,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 629 transitions, 10599 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:56,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:56,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:30:56,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:57,717 INFO L124 PetriNetUnfolderBase]: 4574/6922 cut-off events. [2024-06-28 03:30:57,717 INFO L125 PetriNetUnfolderBase]: For 535780/535916 co-relation queries the response was YES. [2024-06-28 03:30:57,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70129 conditions, 6922 events. 4574/6922 cut-off events. For 535780/535916 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 38941 event pairs, 1370 based on Foata normal form. 26/6923 useless extension candidates. Maximal degree in co-relation 70001. Up to 6515 conditions per place. [2024-06-28 03:30:57,794 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 576 selfloop transitions, 40 changer transitions 0/649 dead transitions. [2024-06-28 03:30:57,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 649 transitions, 12154 flow [2024-06-28 03:30:57,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:30:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:30:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-28 03:30:57,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-28 03:30:57,795 INFO L175 Difference]: Start difference. First operand has 290 places, 629 transitions, 10599 flow. Second operand 7 states and 124 transitions. [2024-06-28 03:30:57,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 649 transitions, 12154 flow [2024-06-28 03:30:58,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 649 transitions, 11480 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-28 03:30:58,389 INFO L231 Difference]: Finished difference. Result has 291 places, 637 transitions, 10228 flow [2024-06-28 03:30:58,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9935, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10228, PETRI_PLACES=291, PETRI_TRANSITIONS=637} [2024-06-28 03:30:58,390 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-28 03:30:58,390 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 637 transitions, 10228 flow [2024-06-28 03:30:58,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:58,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:58,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:58,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 03:30:58,391 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)] === [2024-06-28 03:30:58,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:58,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1343394951, now seen corresponding path program 10 times [2024-06-28 03:30:58,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:58,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174689488] [2024-06-28 03:30:58,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:58,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:59,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:59,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174689488] [2024-06-28 03:30:59,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174689488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:59,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:59,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:59,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430853406] [2024-06-28 03:30:59,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:59,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:59,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:59,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:59,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:59,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:59,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 637 transitions, 10228 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:30:59,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:59,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:59,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:01,202 INFO L124 PetriNetUnfolderBase]: 4834/7233 cut-off events. [2024-06-28 03:31:01,202 INFO L125 PetriNetUnfolderBase]: For 547306/547306 co-relation queries the response was YES. [2024-06-28 03:31:01,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71218 conditions, 7233 events. 4834/7233 cut-off events. For 547306/547306 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 39814 event pairs, 1410 based on Foata normal form. 6/7238 useless extension candidates. Maximal degree in co-relation 71088. Up to 6375 conditions per place. [2024-06-28 03:31:01,282 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 594 selfloop transitions, 99 changer transitions 0/698 dead transitions. [2024-06-28 03:31:01,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 698 transitions, 13083 flow [2024-06-28 03:31:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:31:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:31:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-28 03:31:01,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-28 03:31:01,283 INFO L175 Difference]: Start difference. First operand has 291 places, 637 transitions, 10228 flow. Second operand 10 states and 194 transitions. [2024-06-28 03:31:01,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 698 transitions, 13083 flow [2024-06-28 03:31:01,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 698 transitions, 13007 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 03:31:01,984 INFO L231 Difference]: Finished difference. Result has 299 places, 648 transitions, 10733 flow [2024-06-28 03:31:01,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10152, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10733, PETRI_PLACES=299, PETRI_TRANSITIONS=648} [2024-06-28 03:31:01,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-28 03:31:01,984 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 648 transitions, 10733 flow [2024-06-28 03:31:01,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:31:01,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:01,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:01,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 03:31:01,985 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)] === [2024-06-28 03:31:01,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:01,985 INFO L85 PathProgramCache]: Analyzing trace with hash 998883087, now seen corresponding path program 11 times [2024-06-28 03:31:01,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:01,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490048845] [2024-06-28 03:31:01,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:01,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:31:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:31:02,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:31:02,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490048845] [2024-06-28 03:31:02,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490048845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:31:02,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:31:02,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:31:02,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269507468] [2024-06-28 03:31:02,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:31:02,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:31:02,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:31:02,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:31:02,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:31:03,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:31:03,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 648 transitions, 10733 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:31:03,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:31:03,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:31:03,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:04,815 INFO L124 PetriNetUnfolderBase]: 4869/7284 cut-off events. [2024-06-28 03:31:04,815 INFO L125 PetriNetUnfolderBase]: For 579974/579974 co-relation queries the response was YES. [2024-06-28 03:31:04,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73518 conditions, 7284 events. 4869/7284 cut-off events. For 579974/579974 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 40151 event pairs, 1402 based on Foata normal form. 6/7289 useless extension candidates. Maximal degree in co-relation 73385. Up to 6626 conditions per place. [2024-06-28 03:31:04,895 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 606 selfloop transitions, 82 changer transitions 0/693 dead transitions. [2024-06-28 03:31:04,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 693 transitions, 12869 flow [2024-06-28 03:31:04,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:31:04,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:31:04,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 03:31:04,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-28 03:31:04,897 INFO L175 Difference]: Start difference. First operand has 299 places, 648 transitions, 10733 flow. Second operand 9 states and 172 transitions. [2024-06-28 03:31:04,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 693 transitions, 12869 flow [2024-06-28 03:31:05,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 693 transitions, 12502 flow, removed 115 selfloop flow, removed 5 redundant places. [2024-06-28 03:31:05,625 INFO L231 Difference]: Finished difference. Result has 303 places, 652 transitions, 10700 flow [2024-06-28 03:31:05,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10394, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10700, PETRI_PLACES=303, PETRI_TRANSITIONS=652} [2024-06-28 03:31:05,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-28 03:31:05,626 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 652 transitions, 10700 flow [2024-06-28 03:31:05,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:31:05,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:05,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:05,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 03:31:05,627 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)] === [2024-06-28 03:31:05,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:05,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1343394827, now seen corresponding path program 11 times [2024-06-28 03:31:05,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:05,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122760787] [2024-06-28 03:31:05,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:05,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:31:06,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:31:06,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:31:06,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122760787] [2024-06-28 03:31:06,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122760787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:31:06,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:31:06,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:31:06,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824071122] [2024-06-28 03:31:06,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:31:06,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:31:06,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:31:06,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:31:06,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:31:06,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:31:06,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 652 transitions, 10700 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:31:06,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:31:06,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:31:06,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:08,529 INFO L124 PetriNetUnfolderBase]: 4861/7272 cut-off events. [2024-06-28 03:31:08,530 INFO L125 PetriNetUnfolderBase]: For 583603/583603 co-relation queries the response was YES. [2024-06-28 03:31:08,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73258 conditions, 7272 events. 4861/7272 cut-off events. For 583603/583603 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 40101 event pairs, 1434 based on Foata normal form. 4/7275 useless extension candidates. Maximal degree in co-relation 73123. Up to 7009 conditions per place. [2024-06-28 03:31:08,625 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 650 selfloop transitions, 26 changer transitions 0/681 dead transitions. [2024-06-28 03:31:08,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 681 transitions, 12349 flow [2024-06-28 03:31:08,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:31:08,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:31:08,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-28 03:31:08,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-28 03:31:08,627 INFO L175 Difference]: Start difference. First operand has 303 places, 652 transitions, 10700 flow. Second operand 9 states and 156 transitions. [2024-06-28 03:31:08,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 681 transitions, 12349 flow [2024-06-28 03:31:09,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 681 transitions, 12086 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-28 03:31:09,579 INFO L231 Difference]: Finished difference. Result has 305 places, 654 transitions, 10628 flow [2024-06-28 03:31:09,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10437, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10628, PETRI_PLACES=305, PETRI_TRANSITIONS=654} [2024-06-28 03:31:09,580 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-28 03:31:09,580 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 654 transitions, 10628 flow [2024-06-28 03:31:09,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:31:09,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:09,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:09,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 03:31:09,581 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)] === [2024-06-28 03:31:09,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:09,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1343579525, now seen corresponding path program 3 times [2024-06-28 03:31:09,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:09,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468284376] [2024-06-28 03:31:09,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:09,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:31:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:31:10,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:31:10,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468284376] [2024-06-28 03:31:10,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468284376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:31:10,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:31:10,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:31:10,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016067259] [2024-06-28 03:31:10,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:31:10,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:31:10,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:31:10,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:31:10,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:31:10,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:31:10,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 654 transitions, 10628 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:31:10,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:31:10,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:31:10,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:12,508 INFO L124 PetriNetUnfolderBase]: 4889/7316 cut-off events. [2024-06-28 03:31:12,508 INFO L125 PetriNetUnfolderBase]: For 606740/606740 co-relation queries the response was YES. [2024-06-28 03:31:12,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73560 conditions, 7316 events. 4889/7316 cut-off events. For 606740/606740 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40428 event pairs, 1413 based on Foata normal form. 6/7321 useless extension candidates. Maximal degree in co-relation 73424. Up to 6905 conditions per place. [2024-06-28 03:31:12,613 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 635 selfloop transitions, 49 changer transitions 0/689 dead transitions. [2024-06-28 03:31:12,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 689 transitions, 12544 flow [2024-06-28 03:31:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:31:12,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:31:12,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 03:31:12,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-28 03:31:12,614 INFO L175 Difference]: Start difference. First operand has 305 places, 654 transitions, 10628 flow. Second operand 9 states and 161 transitions. [2024-06-28 03:31:12,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 689 transitions, 12544 flow [2024-06-28 03:31:13,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 689 transitions, 12371 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-28 03:31:13,678 INFO L231 Difference]: Finished difference. Result has 307 places, 657 transitions, 10693 flow [2024-06-28 03:31:13,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10455, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10693, PETRI_PLACES=307, PETRI_TRANSITIONS=657} [2024-06-28 03:31:13,679 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-28 03:31:13,679 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 657 transitions, 10693 flow [2024-06-28 03:31:13,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:31:13,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:13,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:13,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 03:31:13,679 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)] === [2024-06-28 03:31:13,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:13,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1579754637, now seen corresponding path program 1 times [2024-06-28 03:31:13,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:13,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828567232] [2024-06-28 03:31:13,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:13,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:31:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:31:14,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:31:14,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828567232] [2024-06-28 03:31:14,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828567232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:31:14,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:31:14,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:31:14,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652029220] [2024-06-28 03:31:14,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:31:14,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:31:14,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:31:14,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:31:14,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:31:14,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:31:14,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 657 transitions, 10693 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:31:14,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:31:14,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:31:14,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:16,393 INFO L124 PetriNetUnfolderBase]: 4892/7320 cut-off events. [2024-06-28 03:31:16,394 INFO L125 PetriNetUnfolderBase]: For 615599/615599 co-relation queries the response was YES. [2024-06-28 03:31:16,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73898 conditions, 7320 events. 4892/7320 cut-off events. For 615599/615599 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40397 event pairs, 1425 based on Foata normal form. 3/7322 useless extension candidates. Maximal degree in co-relation 73761. Up to 6955 conditions per place. [2024-06-28 03:31:16,500 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 639 selfloop transitions, 47 changer transitions 0/691 dead transitions. [2024-06-28 03:31:16,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 691 transitions, 12531 flow [2024-06-28 03:31:16,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:31:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:31:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 03:31:16,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-28 03:31:16,502 INFO L175 Difference]: Start difference. First operand has 307 places, 657 transitions, 10693 flow. Second operand 8 states and 151 transitions. [2024-06-28 03:31:16,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 691 transitions, 12531 flow [2024-06-28 03:31:17,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 691 transitions, 12327 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-28 03:31:17,533 INFO L231 Difference]: Finished difference. Result has 309 places, 661 transitions, 10746 flow [2024-06-28 03:31:17,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10489, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10746, PETRI_PLACES=309, PETRI_TRANSITIONS=661} [2024-06-28 03:31:17,538 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-28 03:31:17,538 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 661 transitions, 10746 flow [2024-06-28 03:31:17,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:31:17,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:17,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:17,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 03:31:17,538 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)] === [2024-06-28 03:31:17,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:17,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1343572581, now seen corresponding path program 12 times [2024-06-28 03:31:17,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:17,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133542952] [2024-06-28 03:31:17,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:17,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:31:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:31:18,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:31:18,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133542952] [2024-06-28 03:31:18,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133542952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:31:18,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:31:18,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:31:18,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984571603] [2024-06-28 03:31:18,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:31:18,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:31:18,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:31:18,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:31:18,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:31:18,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:31:18,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 661 transitions, 10746 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:31:18,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:31:18,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:31:18,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:20,439 INFO L124 PetriNetUnfolderBase]: 4927/7371 cut-off events. [2024-06-28 03:31:20,440 INFO L125 PetriNetUnfolderBase]: For 639210/639210 co-relation queries the response was YES. [2024-06-28 03:31:20,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74590 conditions, 7371 events. 4927/7371 cut-off events. For 639210/639210 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40649 event pairs, 1412 based on Foata normal form. 6/7376 useless extension candidates. Maximal degree in co-relation 74452. Up to 6713 conditions per place. [2024-06-28 03:31:20,541 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 623 selfloop transitions, 81 changer transitions 0/709 dead transitions. [2024-06-28 03:31:20,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 709 transitions, 12878 flow [2024-06-28 03:31:20,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:31:20,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:31:20,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 03:31:20,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-28 03:31:20,542 INFO L175 Difference]: Start difference. First operand has 309 places, 661 transitions, 10746 flow. Second operand 9 states and 172 transitions. [2024-06-28 03:31:20,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 709 transitions, 12878 flow [2024-06-28 03:31:21,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 709 transitions, 12699 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-28 03:31:21,564 INFO L231 Difference]: Finished difference. Result has 312 places, 665 transitions, 10885 flow [2024-06-28 03:31:21,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10567, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10885, PETRI_PLACES=312, PETRI_TRANSITIONS=665} [2024-06-28 03:31:21,567 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-28 03:31:21,567 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 665 transitions, 10885 flow [2024-06-28 03:31:21,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:31:21,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:21,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:21,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 03:31:21,572 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:31:21,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:21,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1579754885, now seen corresponding path program 4 times [2024-06-28 03:31:21,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:21,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490712684] [2024-06-28 03:31:21,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:21,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:31:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:31:22,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:31:22,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490712684] [2024-06-28 03:31:22,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490712684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:31:22,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:31:22,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:31:22,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794873809] [2024-06-28 03:31:22,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:31:22,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:31:22,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:31:22,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:31:22,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:31:22,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:31:22,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 665 transitions, 10885 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:31:22,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:31:22,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:31:22,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:24,501 INFO L124 PetriNetUnfolderBase]: 4956/7416 cut-off events. [2024-06-28 03:31:24,502 INFO L125 PetriNetUnfolderBase]: For 666496/666496 co-relation queries the response was YES. [2024-06-28 03:31:24,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75686 conditions, 7416 events. 4956/7416 cut-off events. For 666496/666496 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 41050 event pairs, 1428 based on Foata normal form. 6/7421 useless extension candidates. Maximal degree in co-relation 75547. Up to 7074 conditions per place. [2024-06-28 03:31:24,605 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 653 selfloop transitions, 38 changer transitions 0/696 dead transitions. [2024-06-28 03:31:24,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 696 transitions, 12705 flow [2024-06-28 03:31:24,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:31:24,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:31:24,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 03:31:24,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-28 03:31:24,606 INFO L175 Difference]: Start difference. First operand has 312 places, 665 transitions, 10885 flow. Second operand 8 states and 150 transitions. [2024-06-28 03:31:24,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 696 transitions, 12705 flow [2024-06-28 03:31:25,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 696 transitions, 12430 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-28 03:31:25,613 INFO L231 Difference]: Finished difference. Result has 313 places, 668 transitions, 10837 flow [2024-06-28 03:31:25,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10610, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10837, PETRI_PLACES=313, PETRI_TRANSITIONS=668} [2024-06-28 03:31:25,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-28 03:31:25,614 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 668 transitions, 10837 flow [2024-06-28 03:31:25,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:31:25,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:25,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:25,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 03:31:25,614 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:31:25,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:25,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1571473731, now seen corresponding path program 13 times [2024-06-28 03:31:25,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:25,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687234004] [2024-06-28 03:31:25,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:25,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:31:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:31:26,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:31:26,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687234004] [2024-06-28 03:31:26,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687234004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:31:26,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:31:26,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:31:26,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971624092] [2024-06-28 03:31:26,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:31:26,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:31:26,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:31:26,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:31:26,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:31:26,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:31:26,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 668 transitions, 10837 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:31:26,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:31:26,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:31:26,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:28,391 INFO L124 PetriNetUnfolderBase]: 4960/7422 cut-off events. [2024-06-28 03:31:28,391 INFO L125 PetriNetUnfolderBase]: For 679038/679038 co-relation queries the response was YES. [2024-06-28 03:31:28,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75490 conditions, 7422 events. 4960/7422 cut-off events. For 679038/679038 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41037 event pairs, 1426 based on Foata normal form. 6/7427 useless extension candidates. Maximal degree in co-relation 75350. Up to 7009 conditions per place. [2024-06-28 03:31:28,489 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 651 selfloop transitions, 51 changer transitions 0/707 dead transitions. [2024-06-28 03:31:28,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 707 transitions, 12760 flow [2024-06-28 03:31:28,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:31:28,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:31:28,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 03:31:28,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-28 03:31:28,490 INFO L175 Difference]: Start difference. First operand has 313 places, 668 transitions, 10837 flow. Second operand 9 states and 169 transitions. [2024-06-28 03:31:28,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 707 transitions, 12760 flow [2024-06-28 03:31:29,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 707 transitions, 12563 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-28 03:31:29,509 INFO L231 Difference]: Finished difference. Result has 316 places, 672 transitions, 10909 flow [2024-06-28 03:31:29,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10640, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10909, PETRI_PLACES=316, PETRI_TRANSITIONS=672} [2024-06-28 03:31:29,510 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-28 03:31:29,510 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 672 transitions, 10909 flow [2024-06-28 03:31:29,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:31:29,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:29,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:29,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 03:31:29,511 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:31:29,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:29,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1580051555, now seen corresponding path program 5 times [2024-06-28 03:31:29,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:29,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502695965] [2024-06-28 03:31:29,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:29,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:31:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:31:30,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:31:30,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502695965] [2024-06-28 03:31:30,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502695965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:31:30,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:31:30,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:31:30,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682624470] [2024-06-28 03:31:30,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:31:30,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:31:30,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:31:30,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:31:30,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:31:30,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:31:30,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 672 transitions, 10909 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:31:30,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:31:30,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:31:30,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:32,428 INFO L124 PetriNetUnfolderBase]: 4963/7427 cut-off events. [2024-06-28 03:31:32,428 INFO L125 PetriNetUnfolderBase]: For 691239/691239 co-relation queries the response was YES. [2024-06-28 03:31:32,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75477 conditions, 7427 events. 4963/7427 cut-off events. For 691239/691239 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 41117 event pairs, 1409 based on Foata normal form. 6/7432 useless extension candidates. Maximal degree in co-relation 75336. Up to 7113 conditions per place. [2024-06-28 03:31:32,518 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 666 selfloop transitions, 29 changer transitions 0/700 dead transitions. [2024-06-28 03:31:32,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 700 transitions, 12707 flow [2024-06-28 03:31:32,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:31:32,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:31:32,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:31:32,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 03:31:32,520 INFO L175 Difference]: Start difference. First operand has 316 places, 672 transitions, 10909 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:31:32,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 700 transitions, 12707 flow [2024-06-28 03:31:33,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 700 transitions, 12483 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-28 03:31:33,417 INFO L231 Difference]: Finished difference. Result has 317 places, 675 transitions, 10899 flow [2024-06-28 03:31:33,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10685, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10899, PETRI_PLACES=317, PETRI_TRANSITIONS=675} [2024-06-28 03:31:33,418 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-28 03:31:33,418 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 675 transitions, 10899 flow [2024-06-28 03:31:33,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-28 03:31:33,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:33,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:33,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 03:31:33,419 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)] === [2024-06-28 03:31:33,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:33,419 INFO L85 PathProgramCache]: Analyzing trace with hash -2026727183, now seen corresponding path program 3 times [2024-06-28 03:31:33,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:33,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669845390] [2024-06-28 03:31:33,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:33,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:31:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:31:33,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:31:33,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669845390] [2024-06-28 03:31:33,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669845390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:31:33,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:31:33,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:31:33,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41328487] [2024-06-28 03:31:33,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:31:33,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:31:33,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:31:33,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:31:33,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:31:34,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:31:34,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 675 transitions, 10899 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:34,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:31:34,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:31:34,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:35,623 INFO L124 PetriNetUnfolderBase]: 4720/7146 cut-off events. [2024-06-28 03:31:35,624 INFO L125 PetriNetUnfolderBase]: For 700950/701091 co-relation queries the response was YES. [2024-06-28 03:31:35,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73149 conditions, 7146 events. 4720/7146 cut-off events. For 700950/701091 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 40520 event pairs, 1374 based on Foata normal form. 24/7136 useless extension candidates. Maximal degree in co-relation 73007. Up to 6752 conditions per place. [2024-06-28 03:31:35,739 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 631 selfloop transitions, 15 changer transitions 0/683 dead transitions. [2024-06-28 03:31:35,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 683 transitions, 12229 flow [2024-06-28 03:31:35,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:31:35,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:31:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 03:31:35,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-28 03:31:35,740 INFO L175 Difference]: Start difference. First operand has 317 places, 675 transitions, 10899 flow. Second operand 7 states and 117 transitions. [2024-06-28 03:31:35,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 683 transitions, 12229 flow [2024-06-28 03:31:36,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 683 transitions, 12007 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-28 03:31:36,925 INFO L231 Difference]: Finished difference. Result has 318 places, 675 transitions, 10715 flow [2024-06-28 03:31:36,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10677, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10715, PETRI_PLACES=318, PETRI_TRANSITIONS=675} [2024-06-28 03:31:36,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-28 03:31:36,926 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 675 transitions, 10715 flow [2024-06-28 03:31:36,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:36,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:36,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:36,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 03:31:36,927 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)] === [2024-06-28 03:31:36,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:36,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1686575623, now seen corresponding path program 1 times [2024-06-28 03:31:36,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:36,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294528129] [2024-06-28 03:31:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:36,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:31:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:31:37,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:31:37,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294528129] [2024-06-28 03:31:37,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294528129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:31:37,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:31:37,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:31:37,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569628791] [2024-06-28 03:31:37,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:31:37,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:31:37,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:31:37,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:31:37,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:31:37,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:31:37,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 675 transitions, 10715 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:37,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:31:37,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:31:37,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:39,287 INFO L124 PetriNetUnfolderBase]: 4956/7418 cut-off events. [2024-06-28 03:31:39,287 INFO L125 PetriNetUnfolderBase]: For 709407/709407 co-relation queries the response was YES. [2024-06-28 03:31:39,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75051 conditions, 7418 events. 4956/7418 cut-off events. For 709407/709407 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 41051 event pairs, 1434 based on Foata normal form. 3/7420 useless extension candidates. Maximal degree in co-relation 74908. Up to 7164 conditions per place. [2024-06-28 03:31:39,393 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 660 selfloop transitions, 25 changer transitions 0/690 dead transitions. [2024-06-28 03:31:39,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 690 transitions, 12316 flow [2024-06-28 03:31:39,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:31:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:31:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-28 03:31:39,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 03:31:39,394 INFO L175 Difference]: Start difference. First operand has 318 places, 675 transitions, 10715 flow. Second operand 6 states and 111 transitions. [2024-06-28 03:31:39,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 690 transitions, 12316 flow [2024-06-28 03:31:40,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 690 transitions, 12267 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 03:31:40,655 INFO L231 Difference]: Finished difference. Result has 317 places, 678 transitions, 10776 flow [2024-06-28 03:31:40,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10666, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10776, PETRI_PLACES=317, PETRI_TRANSITIONS=678} [2024-06-28 03:31:40,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-28 03:31:40,656 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 678 transitions, 10776 flow [2024-06-28 03:31:40,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:40,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:40,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:40,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 03:31:40,656 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)] === [2024-06-28 03:31:40,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:40,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2026721231, now seen corresponding path program 2 times [2024-06-28 03:31:40,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:40,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394130430] [2024-06-28 03:31:40,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:40,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:31:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:31:41,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:31:41,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394130430] [2024-06-28 03:31:41,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394130430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:31:41,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:31:41,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:31:41,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993577941] [2024-06-28 03:31:41,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:31:41,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:31:41,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:31:41,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:31:41,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:31:41,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:31:41,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 678 transitions, 10776 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:41,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:31:41,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:31:41,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:43,055 INFO L124 PetriNetUnfolderBase]: 4924/7370 cut-off events. [2024-06-28 03:31:43,055 INFO L125 PetriNetUnfolderBase]: For 723572/723578 co-relation queries the response was YES. [2024-06-28 03:31:43,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75020 conditions, 7370 events. 4924/7370 cut-off events. For 723572/723578 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40749 event pairs, 1445 based on Foata normal form. 3/7372 useless extension candidates. Maximal degree in co-relation 74877. Up to 7118 conditions per place. [2024-06-28 03:31:43,156 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 655 selfloop transitions, 26 changer transitions 0/686 dead transitions. [2024-06-28 03:31:43,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 686 transitions, 12176 flow [2024-06-28 03:31:43,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:31:43,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:31:43,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-28 03:31:43,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:31:43,157 INFO L175 Difference]: Start difference. First operand has 317 places, 678 transitions, 10776 flow. Second operand 6 states and 108 transitions. [2024-06-28 03:31:43,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 686 transitions, 12176 flow [2024-06-28 03:31:44,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 686 transitions, 12126 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 03:31:44,352 INFO L231 Difference]: Finished difference. Result has 319 places, 678 transitions, 10784 flow [2024-06-28 03:31:44,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10726, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10784, PETRI_PLACES=319, PETRI_TRANSITIONS=678} [2024-06-28 03:31:44,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-28 03:31:44,353 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 678 transitions, 10784 flow [2024-06-28 03:31:44,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:44,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:44,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:44,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 03:31:44,353 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:31:44,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:44,354 INFO L85 PathProgramCache]: Analyzing trace with hash -2043694165, now seen corresponding path program 1 times [2024-06-28 03:31:44,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:44,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236794723] [2024-06-28 03:31:44,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:44,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:31:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:31:45,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:31:45,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236794723] [2024-06-28 03:31:45,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236794723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:31:45,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:31:45,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:31:45,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523371449] [2024-06-28 03:31:45,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:31:45,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:31:45,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:31:45,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:31:45,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:31:45,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:31:45,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 678 transitions, 10784 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-28 03:31:45,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:31:45,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:31:45,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:47,172 INFO L124 PetriNetUnfolderBase]: 4834/7241 cut-off events. [2024-06-28 03:31:47,172 INFO L125 PetriNetUnfolderBase]: For 744795/744931 co-relation queries the response was YES. [2024-06-28 03:31:47,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74257 conditions, 7241 events. 4834/7241 cut-off events. For 744795/744931 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 40142 event pairs, 1454 based on Foata normal form. 25/7232 useless extension candidates. Maximal degree in co-relation 74113. Up to 6955 conditions per place. [2024-06-28 03:31:47,275 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 642 selfloop transitions, 15 changer transitions 0/692 dead transitions. [2024-06-28 03:31:47,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 692 transitions, 12174 flow [2024-06-28 03:31:47,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:31:47,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:31:47,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:31:47,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-28 03:31:47,276 INFO L175 Difference]: Start difference. First operand has 319 places, 678 transitions, 10784 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:31:47,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 692 transitions, 12174 flow [2024-06-28 03:31:48,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 692 transitions, 12106 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 03:31:48,439 INFO L231 Difference]: Finished difference. Result has 321 places, 681 transitions, 10790 flow [2024-06-28 03:31:48,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10716, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10790, PETRI_PLACES=321, PETRI_TRANSITIONS=681} [2024-06-28 03:31:48,441 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-28 03:31:48,442 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 681 transitions, 10790 flow [2024-06-28 03:31:48,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-28 03:31:48,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:48,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:48,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 03:31:48,442 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)] === [2024-06-28 03:31:48,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:48,443 INFO L85 PathProgramCache]: Analyzing trace with hash -699700221, now seen corresponding path program 1 times [2024-06-28 03:31:48,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:48,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391661368] [2024-06-28 03:31:48,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:48,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:31:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:31:49,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:31:49,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391661368] [2024-06-28 03:31:49,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391661368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:31:49,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:31:49,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:31:49,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887159308] [2024-06-28 03:31:49,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:31:49,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:31:49,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:31:49,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:31:49,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:31:49,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:31:49,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 681 transitions, 10790 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:49,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:31:49,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:31:49,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:51,489 INFO L124 PetriNetUnfolderBase]: 5533/8274 cut-off events. [2024-06-28 03:31:51,489 INFO L125 PetriNetUnfolderBase]: For 999078/999101 co-relation queries the response was YES. [2024-06-28 03:31:51,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91913 conditions, 8274 events. 5533/8274 cut-off events. For 999078/999101 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 46976 event pairs, 1006 based on Foata normal form. 30/8271 useless extension candidates. Maximal degree in co-relation 91768. Up to 5153 conditions per place. [2024-06-28 03:31:51,614 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 580 selfloop transitions, 174 changer transitions 0/759 dead transitions. [2024-06-28 03:31:51,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 759 transitions, 14092 flow [2024-06-28 03:31:51,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:31:51,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:31:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-28 03:31:51,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49783549783549785 [2024-06-28 03:31:51,616 INFO L175 Difference]: Start difference. First operand has 321 places, 681 transitions, 10790 flow. Second operand 11 states and 230 transitions. [2024-06-28 03:31:51,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 759 transitions, 14092 flow [2024-06-28 03:31:53,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 759 transitions, 14040 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 03:31:53,344 INFO L231 Difference]: Finished difference. Result has 330 places, 689 transitions, 11504 flow [2024-06-28 03:31:53,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10738, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11504, PETRI_PLACES=330, PETRI_TRANSITIONS=689} [2024-06-28 03:31:53,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-28 03:31:53,345 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 689 transitions, 11504 flow [2024-06-28 03:31:53,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:53,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:53,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:53,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 03:31:53,346 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)] === [2024-06-28 03:31:53,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:53,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1897644999, now seen corresponding path program 2 times [2024-06-28 03:31:53,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:53,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569969660] [2024-06-28 03:31:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:53,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:31:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:31:54,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:31:54,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569969660] [2024-06-28 03:31:54,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569969660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:31:54,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:31:54,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:31:54,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445324019] [2024-06-28 03:31:54,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:31:54,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:31:54,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:31:54,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:31:54,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:31:54,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:31:54,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 689 transitions, 11504 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:54,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:31:54,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:31:54,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:57,121 INFO L124 PetriNetUnfolderBase]: 6355/9594 cut-off events. [2024-06-28 03:31:57,121 INFO L125 PetriNetUnfolderBase]: For 1329049/1329064 co-relation queries the response was YES. [2024-06-28 03:31:57,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114971 conditions, 9594 events. 6355/9594 cut-off events. For 1329049/1329064 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 57010 event pairs, 1551 based on Foata normal form. 46/9623 useless extension candidates. Maximal degree in co-relation 114822. Up to 6689 conditions per place. [2024-06-28 03:31:57,250 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 588 selfloop transitions, 190 changer transitions 0/783 dead transitions. [2024-06-28 03:31:57,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 783 transitions, 15335 flow [2024-06-28 03:31:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:31:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:31:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-28 03:31:57,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49007936507936506 [2024-06-28 03:31:57,252 INFO L175 Difference]: Start difference. First operand has 330 places, 689 transitions, 11504 flow. Second operand 12 states and 247 transitions. [2024-06-28 03:31:57,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 783 transitions, 15335 flow [2024-06-28 03:31:59,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 783 transitions, 14835 flow, removed 155 selfloop flow, removed 5 redundant places. [2024-06-28 03:31:59,479 INFO L231 Difference]: Finished difference. Result has 339 places, 703 transitions, 12142 flow [2024-06-28 03:31:59,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11168, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12142, PETRI_PLACES=339, PETRI_TRANSITIONS=703} [2024-06-28 03:31:59,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-28 03:31:59,480 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 703 transitions, 12142 flow [2024-06-28 03:31:59,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:59,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:59,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:59,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 03:31:59,481 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)] === [2024-06-28 03:31:59,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:59,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1009190889, now seen corresponding path program 3 times [2024-06-28 03:31:59,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:59,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855611217] [2024-06-28 03:31:59,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:59,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:32:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:32:00,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:32:00,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855611217] [2024-06-28 03:32:00,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855611217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:32:00,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:32:00,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:32:00,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26959604] [2024-06-28 03:32:00,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:32:00,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:32:00,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:32:00,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:32:00,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:32:00,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:32:00,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 703 transitions, 12142 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:32:00,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:32:00,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:32:00,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:32:03,662 INFO L124 PetriNetUnfolderBase]: 6700/10151 cut-off events. [2024-06-28 03:32:03,662 INFO L125 PetriNetUnfolderBase]: For 1506936/1506946 co-relation queries the response was YES. [2024-06-28 03:32:03,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124123 conditions, 10151 events. 6700/10151 cut-off events. For 1506936/1506946 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 61311 event pairs, 1893 based on Foata normal form. 42/10176 useless extension candidates. Maximal degree in co-relation 123970. Up to 7866 conditions per place. [2024-06-28 03:32:03,828 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 596 selfloop transitions, 181 changer transitions 0/782 dead transitions. [2024-06-28 03:32:03,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 782 transitions, 15543 flow [2024-06-28 03:32:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:32:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:32:03,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 243 transitions. [2024-06-28 03:32:03,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-28 03:32:03,830 INFO L175 Difference]: Start difference. First operand has 339 places, 703 transitions, 12142 flow. Second operand 12 states and 243 transitions. [2024-06-28 03:32:03,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 782 transitions, 15543 flow [2024-06-28 03:32:06,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 782 transitions, 15187 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-28 03:32:07,007 INFO L231 Difference]: Finished difference. Result has 345 places, 709 transitions, 12502 flow [2024-06-28 03:32:07,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11786, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12502, PETRI_PLACES=345, PETRI_TRANSITIONS=709} [2024-06-28 03:32:07,008 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-28 03:32:07,008 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 709 transitions, 12502 flow [2024-06-28 03:32:07,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:32:07,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:32:07,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:32:07,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 03:32:07,009 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:32:07,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:32:07,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1895767329, now seen corresponding path program 4 times [2024-06-28 03:32:07,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:32:07,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923537183] [2024-06-28 03:32:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:32:07,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:32:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:32:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:32:07,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:32:07,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923537183] [2024-06-28 03:32:07,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923537183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:32:07,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:32:07,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:32:07,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650913625] [2024-06-28 03:32:07,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:32:07,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:32:07,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:32:07,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:32:07,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:32:07,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:32:07,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 709 transitions, 12502 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:32:07,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:32:07,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:32:07,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:32:11,102 INFO L124 PetriNetUnfolderBase]: 6688/10145 cut-off events. [2024-06-28 03:32:11,102 INFO L125 PetriNetUnfolderBase]: For 1474804/1474814 co-relation queries the response was YES. [2024-06-28 03:32:11,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121554 conditions, 10145 events. 6688/10145 cut-off events. For 1474804/1474814 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 61253 event pairs, 1990 based on Foata normal form. 50/10178 useless extension candidates. Maximal degree in co-relation 121398. Up to 8527 conditions per place. [2024-06-28 03:32:11,333 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 584 selfloop transitions, 188 changer transitions 0/777 dead transitions. [2024-06-28 03:32:11,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 777 transitions, 15372 flow [2024-06-28 03:32:11,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:32:11,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:32:11,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 240 transitions. [2024-06-28 03:32:11,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-28 03:32:11,336 INFO L175 Difference]: Start difference. First operand has 345 places, 709 transitions, 12502 flow. Second operand 12 states and 240 transitions. [2024-06-28 03:32:11,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 777 transitions, 15372 flow [2024-06-28 03:32:14,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 777 transitions, 15016 flow, removed 72 selfloop flow, removed 8 redundant places. [2024-06-28 03:32:14,487 INFO L231 Difference]: Finished difference. Result has 349 places, 711 transitions, 12682 flow [2024-06-28 03:32:14,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12146, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12682, PETRI_PLACES=349, PETRI_TRANSITIONS=711} [2024-06-28 03:32:14,488 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-28 03:32:14,488 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 711 transitions, 12682 flow [2024-06-28 03:32:14,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:32:14,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:32:14,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:32:14,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 03:32:14,488 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:32:14,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:32:14,489 INFO L85 PathProgramCache]: Analyzing trace with hash -2120398697, now seen corresponding path program 5 times [2024-06-28 03:32:14,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:32:14,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054255887] [2024-06-28 03:32:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:32:14,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:32:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:32:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:32:15,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:32:15,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054255887] [2024-06-28 03:32:15,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054255887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:32:15,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:32:15,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:32:15,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414292018] [2024-06-28 03:32:15,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:32:15,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:32:15,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:32:15,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:32:15,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:32:15,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:32:15,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 711 transitions, 12682 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-28 03:32:15,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:32:15,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:32:15,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:32:19,614 INFO L124 PetriNetUnfolderBase]: 8109/12381 cut-off events. [2024-06-28 03:32:19,614 INFO L125 PetriNetUnfolderBase]: For 1910059/1910061 co-relation queries the response was YES. [2024-06-28 03:32:19,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156131 conditions, 12381 events. 8109/12381 cut-off events. For 1910059/1910061 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 78563 event pairs, 2385 based on Foata normal form. 42/12422 useless extension candidates. Maximal degree in co-relation 155973. Up to 9316 conditions per place. [2024-06-28 03:32:19,820 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 640 selfloop transitions, 160 changer transitions 0/805 dead transitions. [2024-06-28 03:32:19,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 805 transitions, 16444 flow [2024-06-28 03:32:19,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:32:19,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:32:19,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 243 transitions. [2024-06-28 03:32:19,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-28 03:32:19,822 INFO L175 Difference]: Start difference. First operand has 349 places, 711 transitions, 12682 flow. Second operand 12 states and 243 transitions. [2024-06-28 03:32:19,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 805 transitions, 16444 flow [2024-06-28 03:32:23,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 805 transitions, 15930 flow, removed 90 selfloop flow, removed 9 redundant places. [2024-06-28 03:32:23,632 INFO L231 Difference]: Finished difference. Result has 354 places, 734 transitions, 13505 flow [2024-06-28 03:32:23,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12268, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13505, PETRI_PLACES=354, PETRI_TRANSITIONS=734} [2024-06-28 03:32:23,632 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-28 03:32:23,632 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 734 transitions, 13505 flow [2024-06-28 03:32:23,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-28 03:32:23,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:32:23,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:32:23,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 03:32:23,633 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:32:23,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:32:23,633 INFO L85 PathProgramCache]: Analyzing trace with hash -851063849, now seen corresponding path program 6 times [2024-06-28 03:32:23,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:32:23,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182463100] [2024-06-28 03:32:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:32:23,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:32:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:32:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:32:24,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:32:24,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182463100] [2024-06-28 03:32:24,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182463100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:32:24,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:32:24,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:32:24,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747039771] [2024-06-28 03:32:24,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:32:24,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:32:24,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:32:24,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:32:24,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:32:24,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:32:24,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 734 transitions, 13505 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-28 03:32:24,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:32:24,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:32:24,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:32:29,124 INFO L124 PetriNetUnfolderBase]: 8327/12751 cut-off events. [2024-06-28 03:32:29,124 INFO L125 PetriNetUnfolderBase]: For 2039321/2039323 co-relation queries the response was YES. [2024-06-28 03:32:29,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159039 conditions, 12751 events. 8327/12751 cut-off events. For 2039321/2039323 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 81833 event pairs, 2784 based on Foata normal form. 74/12824 useless extension candidates. Maximal degree in co-relation 158878. Up to 11339 conditions per place. [2024-06-28 03:32:29,516 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 632 selfloop transitions, 159 changer transitions 0/796 dead transitions. [2024-06-28 03:32:29,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 796 transitions, 16028 flow [2024-06-28 03:32:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:32:29,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:32:29,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 251 transitions. [2024-06-28 03:32:29,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4597069597069597 [2024-06-28 03:32:29,517 INFO L175 Difference]: Start difference. First operand has 354 places, 734 transitions, 13505 flow. Second operand 13 states and 251 transitions. [2024-06-28 03:32:29,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 796 transitions, 16028 flow [2024-06-28 03:32:33,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 796 transitions, 15706 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-28 03:32:33,530 INFO L231 Difference]: Finished difference. Result has 360 places, 738 transitions, 13744 flow [2024-06-28 03:32:33,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13183, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13744, PETRI_PLACES=360, PETRI_TRANSITIONS=738} [2024-06-28 03:32:33,531 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-28 03:32:33,531 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 738 transitions, 13744 flow [2024-06-28 03:32:33,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-28 03:32:33,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:32:33,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:32:33,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 03:32:33,532 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:32:33,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:32:33,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2118524747, now seen corresponding path program 7 times [2024-06-28 03:32:33,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:32:33,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243571498] [2024-06-28 03:32:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:32:33,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:32:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:32:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:32:34,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:32:34,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243571498] [2024-06-28 03:32:34,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243571498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:32:34,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:32:34,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:32:34,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8076377] [2024-06-28 03:32:34,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:32:34,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:32:34,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:32:34,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:32:34,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:32:34,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:32:34,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 738 transitions, 13744 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-28 03:32:34,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:32:34,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:32:34,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:32:38,682 INFO L124 PetriNetUnfolderBase]: 8377/12835 cut-off events. [2024-06-28 03:32:38,683 INFO L125 PetriNetUnfolderBase]: For 1939484/1939486 co-relation queries the response was YES. [2024-06-28 03:32:38,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157394 conditions, 12835 events. 8377/12835 cut-off events. For 1939484/1939486 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 82163 event pairs, 2652 based on Foata normal form. 58/12892 useless extension candidates. Maximal degree in co-relation 157231. Up to 10328 conditions per place. [2024-06-28 03:32:39,057 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 645 selfloop transitions, 157 changer transitions 0/807 dead transitions. [2024-06-28 03:32:39,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 807 transitions, 16697 flow [2024-06-28 03:32:39,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:32:39,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:32:39,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2024-06-28 03:32:39,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-28 03:32:39,058 INFO L175 Difference]: Start difference. First operand has 360 places, 738 transitions, 13744 flow. Second operand 12 states and 236 transitions. [2024-06-28 03:32:39,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 807 transitions, 16697 flow [2024-06-28 03:32:43,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 807 transitions, 16291 flow, removed 52 selfloop flow, removed 11 redundant places. [2024-06-28 03:32:43,409 INFO L231 Difference]: Finished difference. Result has 362 places, 748 transitions, 14189 flow [2024-06-28 03:32:43,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13338, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14189, PETRI_PLACES=362, PETRI_TRANSITIONS=748} [2024-06-28 03:32:43,410 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-28 03:32:43,410 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 748 transitions, 14189 flow [2024-06-28 03:32:43,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-28 03:32:43,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:32:43,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:32:43,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 03:32:43,411 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)] === [2024-06-28 03:32:43,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:32:43,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1152610989, now seen corresponding path program 1 times [2024-06-28 03:32:43,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:32:43,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513609481] [2024-06-28 03:32:43,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:32:43,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:32:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:32:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:32:44,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:32:44,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513609481] [2024-06-28 03:32:44,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513609481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:32:44,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:32:44,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:32:44,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973108804] [2024-06-28 03:32:44,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:32:44,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:32:44,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:32:44,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:32:44,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:32:44,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:32:44,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 748 transitions, 14189 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-28 03:32:44,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:32:44,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:32:44,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:32:48,674 INFO L124 PetriNetUnfolderBase]: 8462/12967 cut-off events. [2024-06-28 03:32:48,675 INFO L125 PetriNetUnfolderBase]: For 1814000/1814010 co-relation queries the response was YES. [2024-06-28 03:32:48,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157132 conditions, 12967 events. 8462/12967 cut-off events. For 1814000/1814010 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 83325 event pairs, 2926 based on Foata normal form. 12/12978 useless extension candidates. Maximal degree in co-relation 156967. Up to 11390 conditions per place. [2024-06-28 03:32:48,870 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 550 selfloop transitions, 272 changer transitions 0/827 dead transitions. [2024-06-28 03:32:48,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 827 transitions, 17248 flow [2024-06-28 03:32:48,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:32:48,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:32:48,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-28 03:32:48,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-28 03:32:48,872 INFO L175 Difference]: Start difference. First operand has 362 places, 748 transitions, 14189 flow. Second operand 10 states and 203 transitions. [2024-06-28 03:32:48,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 827 transitions, 17248 flow [2024-06-28 03:32:53,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 827 transitions, 16900 flow, removed 85 selfloop flow, removed 8 redundant places. [2024-06-28 03:32:53,287 INFO L231 Difference]: Finished difference. Result has 365 places, 771 transitions, 14953 flow [2024-06-28 03:32:53,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13841, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14953, PETRI_PLACES=365, PETRI_TRANSITIONS=771} [2024-06-28 03:32:53,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-28 03:32:53,288 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 771 transitions, 14953 flow [2024-06-28 03:32:53,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-28 03:32:53,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:32:53,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:32:53,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 03:32:53,289 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)] === [2024-06-28 03:32:53,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:32:53,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1542341203, now seen corresponding path program 8 times [2024-06-28 03:32:53,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:32:53,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125024192] [2024-06-28 03:32:53,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:32:53,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:32:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:32:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:32:54,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:32:54,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125024192] [2024-06-28 03:32:54,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125024192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:32:54,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:32:54,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:32:54,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422188522] [2024-06-28 03:32:54,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:32:54,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:32:54,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:32:54,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:32:54,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:32:54,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:32:54,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 771 transitions, 14953 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-28 03:32:54,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:32:54,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:32:54,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:32:58,868 INFO L124 PetriNetUnfolderBase]: 8586/13171 cut-off events. [2024-06-28 03:32:58,869 INFO L125 PetriNetUnfolderBase]: For 1889922/1889932 co-relation queries the response was YES. [2024-06-28 03:32:59,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159186 conditions, 13171 events. 8586/13171 cut-off events. For 1889922/1889932 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 85076 event pairs, 2908 based on Foata normal form. 36/13206 useless extension candidates. Maximal degree in co-relation 159018. Up to 11614 conditions per place. [2024-06-28 03:32:59,100 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 641 selfloop transitions, 211 changer transitions 0/857 dead transitions. [2024-06-28 03:32:59,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 857 transitions, 18080 flow [2024-06-28 03:32:59,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:32:59,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:32:59,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-28 03:32:59,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-28 03:32:59,101 INFO L175 Difference]: Start difference. First operand has 365 places, 771 transitions, 14953 flow. Second operand 11 states and 224 transitions. [2024-06-28 03:32:59,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 857 transitions, 18080 flow [2024-06-28 03:33:03,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 857 transitions, 17571 flow, removed 85 selfloop flow, removed 6 redundant places. [2024-06-28 03:33:03,398 INFO L231 Difference]: Finished difference. Result has 370 places, 773 transitions, 15043 flow [2024-06-28 03:33:03,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14458, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15043, PETRI_PLACES=370, PETRI_TRANSITIONS=773} [2024-06-28 03:33:03,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-28 03:33:03,399 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 773 transitions, 15043 flow [2024-06-28 03:33:03,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-28 03:33:03,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:33:03,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:33:03,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 03:33:03,399 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)] === [2024-06-28 03:33:03,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:33:03,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1547911345, now seen corresponding path program 2 times [2024-06-28 03:33:03,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:33:03,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410713203] [2024-06-28 03:33:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:33:03,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:33:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:33:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:33:04,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:33:04,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410713203] [2024-06-28 03:33:04,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410713203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:33:04,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:33:04,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:33:04,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278749046] [2024-06-28 03:33:04,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:33:04,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:33:04,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:33:04,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:33:04,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:33:04,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:33:04,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 773 transitions, 15043 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-28 03:33:04,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:33:04,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:33:04,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:33:08,671 INFO L124 PetriNetUnfolderBase]: 8614/13215 cut-off events. [2024-06-28 03:33:08,672 INFO L125 PetriNetUnfolderBase]: For 1889493/1889503 co-relation queries the response was YES. [2024-06-28 03:33:08,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160042 conditions, 13215 events. 8614/13215 cut-off events. For 1889493/1889503 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 85435 event pairs, 2924 based on Foata normal form. 12/13226 useless extension candidates. Maximal degree in co-relation 159873. Up to 11638 conditions per place. [2024-06-28 03:33:08,929 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 537 selfloop transitions, 290 changer transitions 0/832 dead transitions. [2024-06-28 03:33:08,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 832 transitions, 17702 flow [2024-06-28 03:33:08,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:33:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:33:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-28 03:33:08,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2024-06-28 03:33:08,931 INFO L175 Difference]: Start difference. First operand has 370 places, 773 transitions, 15043 flow. Second operand 10 states and 202 transitions. [2024-06-28 03:33:08,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 832 transitions, 17702 flow [2024-06-28 03:33:13,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 832 transitions, 17181 flow, removed 53 selfloop flow, removed 9 redundant places. [2024-06-28 03:33:13,052 INFO L231 Difference]: Finished difference. Result has 371 places, 776 transitions, 15284 flow [2024-06-28 03:33:13,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14522, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15284, PETRI_PLACES=371, PETRI_TRANSITIONS=776} [2024-06-28 03:33:13,053 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-28 03:33:13,053 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 776 transitions, 15284 flow [2024-06-28 03:33:13,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-28 03:33:13,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:33:13,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:33:13,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 03:33:13,054 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)] === [2024-06-28 03:33:13,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:33:13,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1542197053, now seen corresponding path program 9 times [2024-06-28 03:33:13,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:33:13,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978816163] [2024-06-28 03:33:13,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:33:13,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:33:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:33:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:33:14,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:33:14,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978816163] [2024-06-28 03:33:14,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978816163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:33:14,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:33:14,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:33:14,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497463232] [2024-06-28 03:33:14,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:33:14,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:33:14,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:33:14,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:33:14,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:33:14,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:33:14,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 776 transitions, 15284 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-28 03:33:14,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:33:14,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:33:14,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:33:18,486 INFO L124 PetriNetUnfolderBase]: 8738/13419 cut-off events. [2024-06-28 03:33:18,486 INFO L125 PetriNetUnfolderBase]: For 2028437/2028447 co-relation queries the response was YES. [2024-06-28 03:33:18,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162819 conditions, 13419 events. 8738/13419 cut-off events. For 2028437/2028447 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 87115 event pairs, 2915 based on Foata normal form. 36/13454 useless extension candidates. Maximal degree in co-relation 162649. Up to 11583 conditions per place. [2024-06-28 03:33:18,707 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 637 selfloop transitions, 226 changer transitions 0/868 dead transitions. [2024-06-28 03:33:18,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 868 transitions, 18625 flow [2024-06-28 03:33:18,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:33:18,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:33:18,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-28 03:33:18,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-28 03:33:18,709 INFO L175 Difference]: Start difference. First operand has 371 places, 776 transitions, 15284 flow. Second operand 12 states and 244 transitions. [2024-06-28 03:33:18,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 868 transitions, 18625 flow