./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix032.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix032.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/mix032.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix032.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-76401ed-m [2024-06-20 16:10:57,971 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:10:58,025 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:10:58,029 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:10:58,029 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:10:58,044 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:10:58,045 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:10:58,045 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:10:58,046 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:10:58,046 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:10:58,046 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:10:58,047 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:10:58,047 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:10:58,047 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:10:58,048 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:10:58,048 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:10:58,048 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:10:58,049 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:10:58,049 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:10:58,049 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:10:58,049 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:10:58,054 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:10:58,054 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:10:58,054 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:10:58,054 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:10:58,055 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:10:58,055 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:10:58,055 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:10:58,055 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:10:58,056 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:10:58,057 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:10:58,057 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:10:58,057 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:10:58,057 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:10:58,058 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:10:58,058 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:10:58,058 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:10:58,058 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:10:58,058 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:10:58,059 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:10:58,059 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:10:58,059 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:10:58,059 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:10:58,059 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:10:58,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:10:58,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:10:58,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:10:58,317 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:10:58,318 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:10:58,318 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix032.oepc.i [2024-06-20 16:10:59,346 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:10:59,537 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:10:59,538 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix032.oepc.i [2024-06-20 16:10:59,549 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d22336b44/bad2731526424bc1aa15fa5d96cbf165/FLAG5ad99f1be [2024-06-20 16:10:59,560 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d22336b44/bad2731526424bc1aa15fa5d96cbf165 [2024-06-20 16:10:59,562 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:10:59,566 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:10:59,567 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix032.oepc.yml/witness.yml [2024-06-20 16:10:59,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:10:59,732 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:10:59,735 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:10:59,735 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:10:59,739 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:10:59,739 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:10:59" (1/2) ... [2024-06-20 16:10:59,740 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e75dea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:10:59, skipping insertion in model container [2024-06-20 16:10:59,740 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:10:59" (1/2) ... [2024-06-20 16:10:59,741 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2239bbef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:10:59, skipping insertion in model container [2024-06-20 16:10:59,742 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:10:59" (2/2) ... [2024-06-20 16:10:59,742 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e75dea1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:10:59, skipping insertion in model container [2024-06-20 16:10:59,742 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:10:59" (2/2) ... [2024-06-20 16:10:59,742 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:10:59,818 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:10:59,819 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1)))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1)))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-20 16:10:59,820 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1)))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1)))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-20 16:10:59,820 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= b$w_buff1 && b$w_buff1 <= 1) && (b$w_buff1 == 0 || b$w_buff1 == 1)))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= b$w_buff0 && b$w_buff0 <= 1) && (b$w_buff0 == 0 || b$w_buff0 == 1)))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= b$mem_tmp && b$mem_tmp <= 1) && (b$mem_tmp == 0 || b$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-20 16:10:59,820 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:10:59,820 INFO L106 edCorrectnessWitness]: ghost_update [L856-L856] multithreaded = 1; [2024-06-20 16:10:59,855 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:11:00,113 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:11:00,120 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:11:00,253 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:11:00,278 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:11:00,279 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:11:00 WrapperNode [2024-06-20 16:11:00,279 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:11:00,280 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:11:00,280 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:11:00,284 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:11:00,289 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 20.06 04:11:00" (1/1) ... [2024-06-20 16:11:00,301 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 20.06 04:11:00" (1/1) ... [2024-06-20 16:11:00,329 INFO L138 Inliner]: procedures = 175, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 130 [2024-06-20 16:11:00,329 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:11:00,330 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:11:00,330 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:11:00,330 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:11:00,338 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:11:00" (1/1) ... [2024-06-20 16:11:00,338 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:11:00" (1/1) ... [2024-06-20 16:11:00,341 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:11:00" (1/1) ... [2024-06-20 16:11:00,373 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]. [2024-06-20 16:11:00,374 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:11:00" (1/1) ... [2024-06-20 16:11:00,374 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:11:00" (1/1) ... [2024-06-20 16:11:00,381 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:11:00" (1/1) ... [2024-06-20 16:11:00,383 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:11:00" (1/1) ... [2024-06-20 16:11:00,385 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:11:00" (1/1) ... [2024-06-20 16:11:00,386 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:11:00" (1/1) ... [2024-06-20 16:11:00,389 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:11:00,389 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:11:00,390 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:11:00,390 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:11:00,390 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:11:00" (1/1) ... [2024-06-20 16:11:00,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:11:00,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:11:00,421 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) [2024-06-20 16:11:00,444 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 [2024-06-20 16:11:00,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:11:00,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:11:00,459 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:11:00,459 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:11:00,459 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:11:00,460 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:11:00,460 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:11:00,460 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:11:00,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:11:00,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:11:00,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:11:00,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:11:00,462 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:11:00,606 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:11:00,608 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:11:00,955 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:11:00,955 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:11:01,052 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:11:01,052 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:11:01,053 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:11:01 BoogieIcfgContainer [2024-06-20 16:11:01,053 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:11:01,054 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:11:01,054 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:11:01,056 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:11:01,057 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:10:59" (1/4) ... [2024-06-20 16:11:01,057 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@221e16a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:11:01, skipping insertion in model container [2024-06-20 16:11:01,057 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:10:59" (2/4) ... [2024-06-20 16:11:01,057 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@221e16a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:11:01, skipping insertion in model container [2024-06-20 16:11:01,058 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:11:00" (3/4) ... [2024-06-20 16:11:01,058 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@221e16a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:11:01, skipping insertion in model container [2024-06-20 16:11:01,058 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:11:01" (4/4) ... [2024-06-20 16:11:01,059 INFO L112 eAbstractionObserver]: Analyzing ICFG mix032.oepc.i [2024-06-20 16:11:01,072 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:11:01,072 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 16:11:01,072 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:11:01,127 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:11:01,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-20 16:11:01,168 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-20 16:11:01,168 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:11:01,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:11:01,170 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-20 16:11:01,172 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-20 16:11:01,177 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:11:01,182 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;@3e621254, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:11:01,182 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 16:11:01,185 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:11:01,185 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:11:01,185 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:11:01,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:01,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:11:01,186 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)] === [2024-06-20 16:11:01,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:01,189 INFO L85 PathProgramCache]: Analyzing trace with hash 385894303, now seen corresponding path program 1 times [2024-06-20 16:11:01,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:01,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028393176] [2024-06-20 16:11:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:01,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:02,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:02,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028393176] [2024-06-20 16:11:02,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028393176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:02,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:02,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:11:02,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516487681] [2024-06-20 16:11:02,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:02,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:11:02,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:02,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:11:02,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:11:02,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-20 16:11:02,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:02,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:02,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-20 16:11:02,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:02,725 INFO L124 PetriNetUnfolderBase]: 1566/2436 cut-off events. [2024-06-20 16:11:02,725 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-20 16:11:02,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4847 conditions, 2436 events. 1566/2436 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12309 event pairs, 1097 based on Foata normal form. 1/2362 useless extension candidates. Maximal degree in co-relation 4835. Up to 2326 conditions per place. [2024-06-20 16:11:02,744 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-20 16:11:02,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 179 flow [2024-06-20 16:11:02,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:11:02,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:11:02,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-20 16:11:02,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212121212121212 [2024-06-20 16:11:02,755 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 82 transitions. [2024-06-20 16:11:02,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 179 flow [2024-06-20 16:11:02,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 16:11:02,762 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-20 16:11:02,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-20 16:11:02,767 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-20 16:11:02,767 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-20 16:11:02,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:02,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:02,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:02,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:11:02,769 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)] === [2024-06-20 16:11:02,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:02,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1477883188, now seen corresponding path program 1 times [2024-06-20 16:11:02,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:02,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272055030] [2024-06-20 16:11:02,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:02,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:03,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:03,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272055030] [2024-06-20 16:11:03,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272055030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:03,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:03,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:11:03,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330121910] [2024-06-20 16:11:03,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:03,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:11:03,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:03,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:11:03,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:11:03,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-20 16:11:03,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:03,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:03,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-20 16:11:03,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:03,889 INFO L124 PetriNetUnfolderBase]: 1560/2433 cut-off events. [2024-06-20 16:11:03,890 INFO L125 PetriNetUnfolderBase]: For 472/472 co-relation queries the response was YES. [2024-06-20 16:11:03,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5449 conditions, 2433 events. 1560/2433 cut-off events. For 472/472 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12315 event pairs, 930 based on Foata normal form. 3/2397 useless extension candidates. Maximal degree in co-relation 5437. Up to 2302 conditions per place. [2024-06-20 16:11:03,903 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 40 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-20 16:11:03,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 246 flow [2024-06-20 16:11:03,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:11:03,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:11:03,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-06-20 16:11:03,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-20 16:11:03,905 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 106 transitions. [2024-06-20 16:11:03,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 246 flow [2024-06-20 16:11:03,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:11:03,906 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-20 16:11:03,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-20 16:11:03,907 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-20 16:11:03,907 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-20 16:11:03,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:03,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:03,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:03,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:11:03,908 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)] === [2024-06-20 16:11:03,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:03,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1388389293, now seen corresponding path program 1 times [2024-06-20 16:11:03,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:03,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174910505] [2024-06-20 16:11:03,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:03,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:04,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:04,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174910505] [2024-06-20 16:11:04,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174910505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:04,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:04,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:11:04,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473408994] [2024-06-20 16:11:04,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:04,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:11:04,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:04,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:11:04,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:11:05,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-20 16:11:05,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-20 16:11:05,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:05,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-20 16:11:05,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:05,426 INFO L124 PetriNetUnfolderBase]: 1893/2922 cut-off events. [2024-06-20 16:11:05,427 INFO L125 PetriNetUnfolderBase]: For 1525/1525 co-relation queries the response was YES. [2024-06-20 16:11:05,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7209 conditions, 2922 events. 1893/2922 cut-off events. For 1525/1525 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14776 event pairs, 878 based on Foata normal form. 3/2877 useless extension candidates. Maximal degree in co-relation 7195. Up to 2753 conditions per place. [2024-06-20 16:11:05,438 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 55 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2024-06-20 16:11:05,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 75 transitions, 380 flow [2024-06-20 16:11:05,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:11:05,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:11:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 16:11:05,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-06-20 16:11:05,440 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 6 states and 149 transitions. [2024-06-20 16:11:05,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 75 transitions, 380 flow [2024-06-20 16:11:05,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 75 transitions, 360 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 16:11:05,442 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 200 flow [2024-06-20 16:11:05,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-20 16:11:05,443 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-06-20 16:11:05,443 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 200 flow [2024-06-20 16:11:05,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-20 16:11:05,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:05,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:05,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:11:05,444 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)] === [2024-06-20 16:11:05,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:05,444 INFO L85 PathProgramCache]: Analyzing trace with hash -946889695, now seen corresponding path program 1 times [2024-06-20 16:11:05,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:05,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069937867] [2024-06-20 16:11:05,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:05,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:06,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:06,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069937867] [2024-06-20 16:11:06,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069937867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:06,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:06,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:11:06,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24678057] [2024-06-20 16:11:06,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:06,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:11:06,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:06,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:11:06,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:11:06,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-20 16:11:06,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:06,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:06,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-20 16:11:06,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:06,968 INFO L124 PetriNetUnfolderBase]: 1884/2903 cut-off events. [2024-06-20 16:11:06,969 INFO L125 PetriNetUnfolderBase]: For 3016/3016 co-relation queries the response was YES. [2024-06-20 16:11:06,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7974 conditions, 2903 events. 1884/2903 cut-off events. For 3016/3016 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14621 event pairs, 690 based on Foata normal form. 6/2859 useless extension candidates. Maximal degree in co-relation 7958. Up to 2708 conditions per place. [2024-06-20 16:11:06,982 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 59 selfloop transitions, 15 changer transitions 0/81 dead transitions. [2024-06-20 16:11:06,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 81 transitions, 440 flow [2024-06-20 16:11:06,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:11:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:11:06,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 16:11:06,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-20 16:11:06,985 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 200 flow. Second operand 7 states and 168 transitions. [2024-06-20 16:11:06,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 81 transitions, 440 flow [2024-06-20 16:11:06,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 412 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:11:06,990 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 221 flow [2024-06-20 16:11:06,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=221, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-20 16:11:06,992 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2024-06-20 16:11:06,992 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 221 flow [2024-06-20 16:11:06,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:06,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:06,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:06,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:11:06,993 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)] === [2024-06-20 16:11:06,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:06,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1725653254, now seen corresponding path program 1 times [2024-06-20 16:11:06,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:06,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810058148] [2024-06-20 16:11:06,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:06,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:07,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:07,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810058148] [2024-06-20 16:11:07,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810058148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:07,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:07,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:11:07,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777023711] [2024-06-20 16:11:07,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:07,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:11:07,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:07,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:11:07,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:11:07,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:11:07,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 221 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:07,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:07,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:11:07,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:08,321 INFO L124 PetriNetUnfolderBase]: 1879/2897 cut-off events. [2024-06-20 16:11:08,321 INFO L125 PetriNetUnfolderBase]: For 4936/4936 co-relation queries the response was YES. [2024-06-20 16:11:08,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8453 conditions, 2897 events. 1879/2897 cut-off events. For 4936/4936 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14622 event pairs, 1116 based on Foata normal form. 2/2857 useless extension candidates. Maximal degree in co-relation 8435. Up to 2767 conditions per place. [2024-06-20 16:11:08,335 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 47 selfloop transitions, 10 changer transitions 0/63 dead transitions. [2024-06-20 16:11:08,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 63 transitions, 388 flow [2024-06-20 16:11:08,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:11:08,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:11:08,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-20 16:11:08,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-20 16:11:08,337 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 221 flow. Second operand 6 states and 114 transitions. [2024-06-20 16:11:08,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 63 transitions, 388 flow [2024-06-20 16:11:08,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 63 transitions, 347 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 16:11:08,340 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 246 flow [2024-06-20 16:11:08,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-20 16:11:08,341 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2024-06-20 16:11:08,341 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 246 flow [2024-06-20 16:11:08,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:08,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:08,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:08,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:11:08,342 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)] === [2024-06-20 16:11:08,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:08,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1955641704, now seen corresponding path program 1 times [2024-06-20 16:11:08,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:08,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501288946] [2024-06-20 16:11:08,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:08,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:09,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:09,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:09,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501288946] [2024-06-20 16:11:09,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501288946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:09,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:09,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:11:09,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710301953] [2024-06-20 16:11:09,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:09,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:11:09,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:09,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:11:09,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:11:09,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:11:09,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:09,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:09,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:11:09,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:09,780 INFO L124 PetriNetUnfolderBase]: 2215/3398 cut-off events. [2024-06-20 16:11:09,781 INFO L125 PetriNetUnfolderBase]: For 7564/7564 co-relation queries the response was YES. [2024-06-20 16:11:09,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10469 conditions, 3398 events. 2215/3398 cut-off events. For 7564/7564 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17012 event pairs, 1326 based on Foata normal form. 2/3378 useless extension candidates. Maximal degree in co-relation 10448. Up to 3242 conditions per place. [2024-06-20 16:11:09,842 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 53 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-20 16:11:09,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 432 flow [2024-06-20 16:11:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:11:09,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:11:09,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-20 16:11:09,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2024-06-20 16:11:09,844 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 246 flow. Second operand 6 states and 115 transitions. [2024-06-20 16:11:09,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 432 flow [2024-06-20 16:11:09,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 70 transitions, 408 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 16:11:09,847 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 280 flow [2024-06-20 16:11:09,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=280, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-20 16:11:09,847 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-20 16:11:09,848 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 280 flow [2024-06-20 16:11:09,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:09,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:09,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:09,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:11:09,848 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)] === [2024-06-20 16:11:09,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:09,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1805651737, now seen corresponding path program 1 times [2024-06-20 16:11:09,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:09,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761236625] [2024-06-20 16:11:09,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:09,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:10,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:10,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:10,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761236625] [2024-06-20 16:11:10,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761236625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:10,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:10,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:11:10,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982053914] [2024-06-20 16:11:10,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:10,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:11:10,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:10,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:11:10,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:11:10,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:11:10,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 280 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:10,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:10,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:11:10,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:11,182 INFO L124 PetriNetUnfolderBase]: 2143/3329 cut-off events. [2024-06-20 16:11:11,183 INFO L125 PetriNetUnfolderBase]: For 10788/10794 co-relation queries the response was YES. [2024-06-20 16:11:11,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11082 conditions, 3329 events. 2143/3329 cut-off events. For 10788/10794 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17211 event pairs, 1150 based on Foata normal form. 6/3272 useless extension candidates. Maximal degree in co-relation 11060. Up to 3072 conditions per place. [2024-06-20 16:11:11,199 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 62 selfloop transitions, 24 changer transitions 0/93 dead transitions. [2024-06-20 16:11:11,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 635 flow [2024-06-20 16:11:11,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:11:11,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:11:11,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-20 16:11:11,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-06-20 16:11:11,200 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 280 flow. Second operand 7 states and 148 transitions. [2024-06-20 16:11:11,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 635 flow [2024-06-20 16:11:11,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 93 transitions, 601 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 16:11:11,204 INFO L231 Difference]: Finished difference. Result has 66 places, 70 transitions, 419 flow [2024-06-20 16:11:11,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=419, PETRI_PLACES=66, PETRI_TRANSITIONS=70} [2024-06-20 16:11:11,205 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 21 predicate places. [2024-06-20 16:11:11,205 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 70 transitions, 419 flow [2024-06-20 16:11:11,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:11,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:11,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:11,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:11:11,205 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)] === [2024-06-20 16:11:11,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:11,206 INFO L85 PathProgramCache]: Analyzing trace with hash 695777733, now seen corresponding path program 2 times [2024-06-20 16:11:11,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:11,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500134972] [2024-06-20 16:11:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:11,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:11,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:12,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:12,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500134972] [2024-06-20 16:11:12,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500134972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:12,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:12,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:11:12,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336239445] [2024-06-20 16:11:12,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:12,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:11:12,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:12,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:11:12,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:11:12,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:11:12,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 70 transitions, 419 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:12,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:12,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:11:12,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:12,595 INFO L124 PetriNetUnfolderBase]: 2161/3356 cut-off events. [2024-06-20 16:11:12,595 INFO L125 PetriNetUnfolderBase]: For 14387/14393 co-relation queries the response was YES. [2024-06-20 16:11:12,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12099 conditions, 3356 events. 2161/3356 cut-off events. For 14387/14393 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17341 event pairs, 1150 based on Foata normal form. 7/3300 useless extension candidates. Maximal degree in co-relation 12074. Up to 3092 conditions per place. [2024-06-20 16:11:12,611 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 59 selfloop transitions, 29 changer transitions 0/95 dead transitions. [2024-06-20 16:11:12,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 95 transitions, 743 flow [2024-06-20 16:11:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:11:12,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:11:12,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-20 16:11:12,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4810606060606061 [2024-06-20 16:11:12,612 INFO L175 Difference]: Start difference. First operand has 66 places, 70 transitions, 419 flow. Second operand 6 states and 127 transitions. [2024-06-20 16:11:12,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 95 transitions, 743 flow [2024-06-20 16:11:12,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 95 transitions, 714 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-20 16:11:12,619 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 525 flow [2024-06-20 16:11:12,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=525, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2024-06-20 16:11:12,620 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 25 predicate places. [2024-06-20 16:11:12,620 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 525 flow [2024-06-20 16:11:12,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:12,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:12,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:12,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:11:12,621 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)] === [2024-06-20 16:11:12,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:12,621 INFO L85 PathProgramCache]: Analyzing trace with hash 735309243, now seen corresponding path program 3 times [2024-06-20 16:11:12,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:12,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693597330] [2024-06-20 16:11:12,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:12,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:13,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:13,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693597330] [2024-06-20 16:11:13,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693597330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:13,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:13,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:11:13,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417129522] [2024-06-20 16:11:13,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:13,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:11:13,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:13,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:11:13,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:11:13,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:11:13,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 525 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:13,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:13,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:11:13,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:14,013 INFO L124 PetriNetUnfolderBase]: 2175/3382 cut-off events. [2024-06-20 16:11:14,014 INFO L125 PetriNetUnfolderBase]: For 16912/16912 co-relation queries the response was YES. [2024-06-20 16:11:14,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12463 conditions, 3382 events. 2175/3382 cut-off events. For 16912/16912 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17409 event pairs, 1231 based on Foata normal form. 3/3320 useless extension candidates. Maximal degree in co-relation 12436. Up to 3163 conditions per place. [2024-06-20 16:11:14,028 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 68 selfloop transitions, 15 changer transitions 0/90 dead transitions. [2024-06-20 16:11:14,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 90 transitions, 735 flow [2024-06-20 16:11:14,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:11:14,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:11:14,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-20 16:11:14,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-20 16:11:14,030 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 525 flow. Second operand 6 states and 120 transitions. [2024-06-20 16:11:14,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 90 transitions, 735 flow [2024-06-20 16:11:14,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 90 transitions, 639 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 16:11:14,036 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 470 flow [2024-06-20 16:11:14,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=470, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2024-06-20 16:11:14,037 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 27 predicate places. [2024-06-20 16:11:14,037 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 470 flow [2024-06-20 16:11:14,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:14,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:14,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:14,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:11:14,038 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)] === [2024-06-20 16:11:14,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:14,038 INFO L85 PathProgramCache]: Analyzing trace with hash -495349031, now seen corresponding path program 1 times [2024-06-20 16:11:14,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:14,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031335496] [2024-06-20 16:11:14,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:14,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:14,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:14,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031335496] [2024-06-20 16:11:14,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031335496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:14,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:14,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:11:14,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622931775] [2024-06-20 16:11:14,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:14,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:11:14,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:14,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:11:14,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:11:14,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:11:14,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 470 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:14,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:14,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:11:14,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:15,656 INFO L124 PetriNetUnfolderBase]: 2248/3449 cut-off events. [2024-06-20 16:11:15,657 INFO L125 PetriNetUnfolderBase]: For 15466/15466 co-relation queries the response was YES. [2024-06-20 16:11:15,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12415 conditions, 3449 events. 2248/3449 cut-off events. For 15466/15466 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17274 event pairs, 1257 based on Foata normal form. 4/3429 useless extension candidates. Maximal degree in co-relation 12388. Up to 3273 conditions per place. [2024-06-20 16:11:15,673 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 78 selfloop transitions, 15 changer transitions 0/98 dead transitions. [2024-06-20 16:11:15,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 98 transitions, 738 flow [2024-06-20 16:11:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:11:15,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:11:15,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 16:11:15,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-20 16:11:15,674 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 470 flow. Second operand 7 states and 133 transitions. [2024-06-20 16:11:15,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 98 transitions, 738 flow [2024-06-20 16:11:15,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 98 transitions, 684 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:11:15,681 INFO L231 Difference]: Finished difference. Result has 73 places, 79 transitions, 486 flow [2024-06-20 16:11:15,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=486, PETRI_PLACES=73, PETRI_TRANSITIONS=79} [2024-06-20 16:11:15,681 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-06-20 16:11:15,681 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 79 transitions, 486 flow [2024-06-20 16:11:15,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:15,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:15,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:15,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:11:15,682 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)] === [2024-06-20 16:11:15,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:15,683 INFO L85 PathProgramCache]: Analyzing trace with hash -840518993, now seen corresponding path program 1 times [2024-06-20 16:11:15,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:15,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278139620] [2024-06-20 16:11:15,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:15,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:16,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:16,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278139620] [2024-06-20 16:11:16,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278139620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:16,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:16,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:11:16,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905534731] [2024-06-20 16:11:16,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:16,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:11:16,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:16,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:11:16,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:11:16,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:11:16,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 79 transitions, 486 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:16,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:16,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:11:16,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:17,425 INFO L124 PetriNetUnfolderBase]: 2191/3396 cut-off events. [2024-06-20 16:11:17,425 INFO L125 PetriNetUnfolderBase]: For 19895/19898 co-relation queries the response was YES. [2024-06-20 16:11:17,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13133 conditions, 3396 events. 2191/3396 cut-off events. For 19895/19898 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17512 event pairs, 1085 based on Foata normal form. 4/3338 useless extension candidates. Maximal degree in co-relation 13106. Up to 3131 conditions per place. [2024-06-20 16:11:17,445 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 92 selfloop transitions, 30 changer transitions 0/129 dead transitions. [2024-06-20 16:11:17,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 129 transitions, 1000 flow [2024-06-20 16:11:17,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:11:17,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:11:17,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-20 16:11:17,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-20 16:11:17,447 INFO L175 Difference]: Start difference. First operand has 73 places, 79 transitions, 486 flow. Second operand 10 states and 200 transitions. [2024-06-20 16:11:17,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 129 transitions, 1000 flow [2024-06-20 16:11:17,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 129 transitions, 954 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 16:11:17,460 INFO L231 Difference]: Finished difference. Result has 80 places, 94 transitions, 644 flow [2024-06-20 16:11:17,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=644, PETRI_PLACES=80, PETRI_TRANSITIONS=94} [2024-06-20 16:11:17,461 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-20 16:11:17,461 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 94 transitions, 644 flow [2024-06-20 16:11:17,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:17,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:17,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:17,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:11:17,462 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)] === [2024-06-20 16:11:17,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:17,462 INFO L85 PathProgramCache]: Analyzing trace with hash -180446447, now seen corresponding path program 2 times [2024-06-20 16:11:17,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:17,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559860809] [2024-06-20 16:11:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:17,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:18,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:18,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559860809] [2024-06-20 16:11:18,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559860809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:18,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:18,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:11:18,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739705170] [2024-06-20 16:11:18,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:18,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:11:18,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:18,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:11:18,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:11:18,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:11:18,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 644 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:18,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:18,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:11:18,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:18,965 INFO L124 PetriNetUnfolderBase]: 2225/3456 cut-off events. [2024-06-20 16:11:18,966 INFO L125 PetriNetUnfolderBase]: For 24409/24411 co-relation queries the response was YES. [2024-06-20 16:11:18,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14265 conditions, 3456 events. 2225/3456 cut-off events. For 24409/24411 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 17776 event pairs, 1022 based on Foata normal form. 5/3415 useless extension candidates. Maximal degree in co-relation 14235. Up to 3186 conditions per place. [2024-06-20 16:11:18,985 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 92 selfloop transitions, 36 changer transitions 0/135 dead transitions. [2024-06-20 16:11:18,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 135 transitions, 1149 flow [2024-06-20 16:11:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:18,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:18,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-20 16:11:18,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-20 16:11:18,987 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 644 flow. Second operand 8 states and 163 transitions. [2024-06-20 16:11:18,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 135 transitions, 1149 flow [2024-06-20 16:11:19,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 135 transitions, 1048 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-20 16:11:19,002 INFO L231 Difference]: Finished difference. Result has 85 places, 111 transitions, 831 flow [2024-06-20 16:11:19,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=831, PETRI_PLACES=85, PETRI_TRANSITIONS=111} [2024-06-20 16:11:19,003 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-20 16:11:19,003 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 111 transitions, 831 flow [2024-06-20 16:11:19,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:19,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:19,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:19,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:11:19,004 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)] === [2024-06-20 16:11:19,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:19,004 INFO L85 PathProgramCache]: Analyzing trace with hash 388082163, now seen corresponding path program 3 times [2024-06-20 16:11:19,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:19,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184918673] [2024-06-20 16:11:19,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:19,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:19,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:19,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184918673] [2024-06-20 16:11:19,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184918673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:19,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:19,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:11:19,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581535857] [2024-06-20 16:11:19,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:19,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:11:19,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:19,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:11:19,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:11:19,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:11:19,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 111 transitions, 831 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:19,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:19,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:11:19,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:20,647 INFO L124 PetriNetUnfolderBase]: 2236/3479 cut-off events. [2024-06-20 16:11:20,647 INFO L125 PetriNetUnfolderBase]: For 27926/27932 co-relation queries the response was YES. [2024-06-20 16:11:20,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14817 conditions, 3479 events. 2236/3479 cut-off events. For 27926/27932 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17907 event pairs, 1020 based on Foata normal form. 6/3452 useless extension candidates. Maximal degree in co-relation 14784. Up to 3104 conditions per place. [2024-06-20 16:11:20,662 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 75 selfloop transitions, 67 changer transitions 0/149 dead transitions. [2024-06-20 16:11:20,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 149 transitions, 1390 flow [2024-06-20 16:11:20,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:20,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:20,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-20 16:11:20,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-20 16:11:20,663 INFO L175 Difference]: Start difference. First operand has 85 places, 111 transitions, 831 flow. Second operand 8 states and 169 transitions. [2024-06-20 16:11:20,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 149 transitions, 1390 flow [2024-06-20 16:11:20,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 149 transitions, 1319 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-20 16:11:20,680 INFO L231 Difference]: Finished difference. Result has 91 places, 122 transitions, 1050 flow [2024-06-20 16:11:20,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1050, PETRI_PLACES=91, PETRI_TRANSITIONS=122} [2024-06-20 16:11:20,680 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 46 predicate places. [2024-06-20 16:11:20,680 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 122 transitions, 1050 flow [2024-06-20 16:11:20,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:20,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:20,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:20,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:11:20,681 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)] === [2024-06-20 16:11:20,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:20,681 INFO L85 PathProgramCache]: Analyzing trace with hash -180326291, now seen corresponding path program 1 times [2024-06-20 16:11:20,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:20,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442416440] [2024-06-20 16:11:20,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:20,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:21,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:21,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442416440] [2024-06-20 16:11:21,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442416440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:21,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:21,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:11:21,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135591643] [2024-06-20 16:11:21,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:21,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:11:21,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:21,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:11:21,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:11:21,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:11:21,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 122 transitions, 1050 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:21,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:21,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:11:21,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:22,213 INFO L124 PetriNetUnfolderBase]: 2383/3639 cut-off events. [2024-06-20 16:11:22,214 INFO L125 PetriNetUnfolderBase]: For 33309/33317 co-relation queries the response was YES. [2024-06-20 16:11:22,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16238 conditions, 3639 events. 2383/3639 cut-off events. For 33309/33317 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18232 event pairs, 1171 based on Foata normal form. 5/3622 useless extension candidates. Maximal degree in co-relation 16203. Up to 3396 conditions per place. [2024-06-20 16:11:22,233 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 115 selfloop transitions, 39 changer transitions 0/159 dead transitions. [2024-06-20 16:11:22,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 159 transitions, 1632 flow [2024-06-20 16:11:22,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:22,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-20 16:11:22,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-20 16:11:22,234 INFO L175 Difference]: Start difference. First operand has 91 places, 122 transitions, 1050 flow. Second operand 8 states and 162 transitions. [2024-06-20 16:11:22,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 159 transitions, 1632 flow [2024-06-20 16:11:22,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 159 transitions, 1552 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-20 16:11:22,256 INFO L231 Difference]: Finished difference. Result has 96 places, 132 transitions, 1181 flow [2024-06-20 16:11:22,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1181, PETRI_PLACES=96, PETRI_TRANSITIONS=132} [2024-06-20 16:11:22,257 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 51 predicate places. [2024-06-20 16:11:22,257 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 132 transitions, 1181 flow [2024-06-20 16:11:22,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:22,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:22,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:22,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:11:22,258 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)] === [2024-06-20 16:11:22,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:22,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1741696509, now seen corresponding path program 4 times [2024-06-20 16:11:22,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:22,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276821152] [2024-06-20 16:11:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:22,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:23,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:23,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276821152] [2024-06-20 16:11:23,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276821152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:23,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:23,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:11:23,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997243062] [2024-06-20 16:11:23,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:23,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:11:23,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:23,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:11:23,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:11:23,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:11:23,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 132 transitions, 1181 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:23,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:23,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:11:23,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:23,816 INFO L124 PetriNetUnfolderBase]: 2275/3528 cut-off events. [2024-06-20 16:11:23,817 INFO L125 PetriNetUnfolderBase]: For 38225/38234 co-relation queries the response was YES. [2024-06-20 16:11:23,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16331 conditions, 3528 events. 2275/3528 cut-off events. For 38225/38234 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18224 event pairs, 1069 based on Foata normal form. 5/3485 useless extension candidates. Maximal degree in co-relation 16294. Up to 3220 conditions per place. [2024-06-20 16:11:23,836 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 102 selfloop transitions, 42 changer transitions 0/154 dead transitions. [2024-06-20 16:11:23,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 154 transitions, 1567 flow [2024-06-20 16:11:23,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:11:23,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:11:23,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-20 16:11:23,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-20 16:11:23,838 INFO L175 Difference]: Start difference. First operand has 96 places, 132 transitions, 1181 flow. Second operand 7 states and 144 transitions. [2024-06-20 16:11:23,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 154 transitions, 1567 flow [2024-06-20 16:11:23,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 154 transitions, 1490 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-20 16:11:23,868 INFO L231 Difference]: Finished difference. Result has 100 places, 132 transitions, 1214 flow [2024-06-20 16:11:23,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1214, PETRI_PLACES=100, PETRI_TRANSITIONS=132} [2024-06-20 16:11:23,871 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 55 predicate places. [2024-06-20 16:11:23,871 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 132 transitions, 1214 flow [2024-06-20 16:11:23,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:23,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:23,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:23,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:11:23,872 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:23,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:23,872 INFO L85 PathProgramCache]: Analyzing trace with hash 588671693, now seen corresponding path program 5 times [2024-06-20 16:11:23,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:23,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291581874] [2024-06-20 16:11:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:23,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:24,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:24,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:24,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291581874] [2024-06-20 16:11:24,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291581874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:24,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:24,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:11:24,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719691005] [2024-06-20 16:11:24,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:24,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:11:24,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:24,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:11:24,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:11:24,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:11:24,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 132 transitions, 1214 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:24,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:24,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:11:24,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:25,418 INFO L124 PetriNetUnfolderBase]: 2335/3623 cut-off events. [2024-06-20 16:11:25,418 INFO L125 PetriNetUnfolderBase]: For 43937/43941 co-relation queries the response was YES. [2024-06-20 16:11:25,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17369 conditions, 3623 events. 2335/3623 cut-off events. For 43937/43941 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18734 event pairs, 1167 based on Foata normal form. 5/3580 useless extension candidates. Maximal degree in co-relation 17330. Up to 3275 conditions per place. [2024-06-20 16:11:25,434 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 109 selfloop transitions, 62 changer transitions 0/181 dead transitions. [2024-06-20 16:11:25,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 181 transitions, 2024 flow [2024-06-20 16:11:25,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:25,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:25,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 16:11:25,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-20 16:11:25,436 INFO L175 Difference]: Start difference. First operand has 100 places, 132 transitions, 1214 flow. Second operand 8 states and 157 transitions. [2024-06-20 16:11:25,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 181 transitions, 2024 flow [2024-06-20 16:11:25,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 181 transitions, 1878 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 16:11:25,462 INFO L231 Difference]: Finished difference. Result has 103 places, 159 transitions, 1617 flow [2024-06-20 16:11:25,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1617, PETRI_PLACES=103, PETRI_TRANSITIONS=159} [2024-06-20 16:11:25,462 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-20 16:11:25,462 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 159 transitions, 1617 flow [2024-06-20 16:11:25,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:25,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:25,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:25,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:11:25,463 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)] === [2024-06-20 16:11:25,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:25,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1741816665, now seen corresponding path program 2 times [2024-06-20 16:11:25,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:25,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564424500] [2024-06-20 16:11:25,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:25,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:26,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:26,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564424500] [2024-06-20 16:11:26,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564424500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:26,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:26,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:11:26,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082068435] [2024-06-20 16:11:26,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:26,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:11:26,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:26,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:11:26,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:11:26,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:11:26,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 159 transitions, 1617 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:26,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:26,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:11:26,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:26,990 INFO L124 PetriNetUnfolderBase]: 2460/3754 cut-off events. [2024-06-20 16:11:26,991 INFO L125 PetriNetUnfolderBase]: For 38278/38285 co-relation queries the response was YES. [2024-06-20 16:11:27,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17681 conditions, 3754 events. 2460/3754 cut-off events. For 38278/38285 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18828 event pairs, 1173 based on Foata normal form. 7/3739 useless extension candidates. Maximal degree in co-relation 17640. Up to 3491 conditions per place. [2024-06-20 16:11:27,011 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 135 selfloop transitions, 49 changer transitions 0/189 dead transitions. [2024-06-20 16:11:27,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 189 transitions, 2226 flow [2024-06-20 16:11:27,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:11:27,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:11:27,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-20 16:11:27,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-20 16:11:27,013 INFO L175 Difference]: Start difference. First operand has 103 places, 159 transitions, 1617 flow. Second operand 7 states and 141 transitions. [2024-06-20 16:11:27,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 189 transitions, 2226 flow [2024-06-20 16:11:27,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 189 transitions, 2097 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-20 16:11:27,041 INFO L231 Difference]: Finished difference. Result has 106 places, 165 transitions, 1674 flow [2024-06-20 16:11:27,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1674, PETRI_PLACES=106, PETRI_TRANSITIONS=165} [2024-06-20 16:11:27,042 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 61 predicate places. [2024-06-20 16:11:27,042 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 165 transitions, 1674 flow [2024-06-20 16:11:27,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:27,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:27,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:27,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:11:27,043 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)] === [2024-06-20 16:11:27,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:27,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1352819495, now seen corresponding path program 6 times [2024-06-20 16:11:27,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:27,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907129967] [2024-06-20 16:11:27,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:27,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:27,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:27,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907129967] [2024-06-20 16:11:27,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907129967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:27,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:27,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:11:27,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119440150] [2024-06-20 16:11:27,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:27,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:11:27,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:27,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:11:27,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:11:28,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:11:28,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 165 transitions, 1674 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:28,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:28,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:11:28,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:28,700 INFO L124 PetriNetUnfolderBase]: 2343/3637 cut-off events. [2024-06-20 16:11:28,700 INFO L125 PetriNetUnfolderBase]: For 44362/44363 co-relation queries the response was YES. [2024-06-20 16:11:28,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17565 conditions, 3637 events. 2343/3637 cut-off events. For 44362/44363 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18778 event pairs, 1171 based on Foata normal form. 3/3593 useless extension candidates. Maximal degree in co-relation 17523. Up to 3372 conditions per place. [2024-06-20 16:11:28,721 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 149 selfloop transitions, 22 changer transitions 0/183 dead transitions. [2024-06-20 16:11:28,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 183 transitions, 2102 flow [2024-06-20 16:11:28,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:28,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:28,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 16:11:28,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-20 16:11:28,723 INFO L175 Difference]: Start difference. First operand has 106 places, 165 transitions, 1674 flow. Second operand 8 states and 150 transitions. [2024-06-20 16:11:28,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 183 transitions, 2102 flow [2024-06-20 16:11:28,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 183 transitions, 1958 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-20 16:11:28,754 INFO L231 Difference]: Finished difference. Result has 109 places, 165 transitions, 1586 flow [2024-06-20 16:11:28,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1530, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1586, PETRI_PLACES=109, PETRI_TRANSITIONS=165} [2024-06-20 16:11:28,754 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 64 predicate places. [2024-06-20 16:11:28,754 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 165 transitions, 1586 flow [2024-06-20 16:11:28,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:28,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:28,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:28,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:11:28,755 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)] === [2024-06-20 16:11:28,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:28,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1823804825, now seen corresponding path program 3 times [2024-06-20 16:11:28,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:28,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171457063] [2024-06-20 16:11:28,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:28,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:29,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:29,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171457063] [2024-06-20 16:11:29,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171457063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:29,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:29,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:11:29,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568804385] [2024-06-20 16:11:29,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:29,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:11:29,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:29,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:11:29,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:11:29,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:11:29,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 165 transitions, 1586 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:29,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:29,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:11:29,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:30,252 INFO L124 PetriNetUnfolderBase]: 2470/3781 cut-off events. [2024-06-20 16:11:30,253 INFO L125 PetriNetUnfolderBase]: For 42090/42090 co-relation queries the response was YES. [2024-06-20 16:11:30,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17843 conditions, 3781 events. 2470/3781 cut-off events. For 42090/42090 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 19062 event pairs, 1250 based on Foata normal form. 3/3766 useless extension candidates. Maximal degree in co-relation 17801. Up to 3573 conditions per place. [2024-06-20 16:11:30,277 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 157 selfloop transitions, 30 changer transitions 0/192 dead transitions. [2024-06-20 16:11:30,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 192 transitions, 2190 flow [2024-06-20 16:11:30,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:30,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:30,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 16:11:30,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-20 16:11:30,287 INFO L175 Difference]: Start difference. First operand has 109 places, 165 transitions, 1586 flow. Second operand 8 states and 147 transitions. [2024-06-20 16:11:30,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 192 transitions, 2190 flow [2024-06-20 16:11:30,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 192 transitions, 2080 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 16:11:30,354 INFO L231 Difference]: Finished difference. Result has 110 places, 171 transitions, 1625 flow [2024-06-20 16:11:30,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1625, PETRI_PLACES=110, PETRI_TRANSITIONS=171} [2024-06-20 16:11:30,356 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 65 predicate places. [2024-06-20 16:11:30,356 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 171 transitions, 1625 flow [2024-06-20 16:11:30,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:30,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:30,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:30,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:11:30,356 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)] === [2024-06-20 16:11:30,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:30,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1824041975, now seen corresponding path program 4 times [2024-06-20 16:11:30,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:30,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392012074] [2024-06-20 16:11:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:30,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:31,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:31,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392012074] [2024-06-20 16:11:31,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392012074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:31,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:31,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:11:31,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265401408] [2024-06-20 16:11:31,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:31,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:11:31,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:31,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:11:31,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:11:31,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:11:31,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 171 transitions, 1625 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:31,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:31,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:11:31,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:31,874 INFO L124 PetriNetUnfolderBase]: 2462/3770 cut-off events. [2024-06-20 16:11:31,874 INFO L125 PetriNetUnfolderBase]: For 46280/46280 co-relation queries the response was YES. [2024-06-20 16:11:31,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17920 conditions, 3770 events. 2462/3770 cut-off events. For 46280/46280 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18960 event pairs, 1250 based on Foata normal form. 3/3755 useless extension candidates. Maximal degree in co-relation 17878. Up to 3590 conditions per place. [2024-06-20 16:11:31,896 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 166 selfloop transitions, 18 changer transitions 0/189 dead transitions. [2024-06-20 16:11:31,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 189 transitions, 2076 flow [2024-06-20 16:11:31,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:11:31,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:11:31,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 16:11:31,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:11:31,897 INFO L175 Difference]: Start difference. First operand has 110 places, 171 transitions, 1625 flow. Second operand 7 states and 132 transitions. [2024-06-20 16:11:31,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 189 transitions, 2076 flow [2024-06-20 16:11:31,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 189 transitions, 1934 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 16:11:31,929 INFO L231 Difference]: Finished difference. Result has 111 places, 171 transitions, 1530 flow [2024-06-20 16:11:31,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1530, PETRI_PLACES=111, PETRI_TRANSITIONS=171} [2024-06-20 16:11:31,930 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-20 16:11:31,930 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 171 transitions, 1530 flow [2024-06-20 16:11:31,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:31,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:31,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:31,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:11:31,930 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:31,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:31,931 INFO L85 PathProgramCache]: Analyzing trace with hash 751371355, now seen corresponding path program 1 times [2024-06-20 16:11:31,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:31,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939476723] [2024-06-20 16:11:31,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:31,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:32,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:32,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939476723] [2024-06-20 16:11:32,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939476723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:32,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:32,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:11:32,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486611351] [2024-06-20 16:11:32,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:32,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:11:32,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:32,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:11:32,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:11:32,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:11:32,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 171 transitions, 1530 flow. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:32,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:32,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:11:32,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:33,225 INFO L124 PetriNetUnfolderBase]: 2508/3925 cut-off events. [2024-06-20 16:11:33,225 INFO L125 PetriNetUnfolderBase]: For 60075/60082 co-relation queries the response was YES. [2024-06-20 16:11:33,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19109 conditions, 3925 events. 2508/3925 cut-off events. For 60075/60082 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 20748 event pairs, 1404 based on Foata normal form. 2/3894 useless extension candidates. Maximal degree in co-relation 19066. Up to 3661 conditions per place. [2024-06-20 16:11:33,251 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 143 selfloop transitions, 9 changer transitions 0/181 dead transitions. [2024-06-20 16:11:33,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 181 transitions, 1884 flow [2024-06-20 16:11:33,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:11:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:11:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-20 16:11:33,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-20 16:11:33,253 INFO L175 Difference]: Start difference. First operand has 111 places, 171 transitions, 1530 flow. Second operand 5 states and 98 transitions. [2024-06-20 16:11:33,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 181 transitions, 1884 flow [2024-06-20 16:11:33,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 181 transitions, 1829 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 16:11:33,289 INFO L231 Difference]: Finished difference. Result has 110 places, 174 transitions, 1527 flow [2024-06-20 16:11:33,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1475, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1527, PETRI_PLACES=110, PETRI_TRANSITIONS=174} [2024-06-20 16:11:33,290 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 65 predicate places. [2024-06-20 16:11:33,290 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 174 transitions, 1527 flow [2024-06-20 16:11:33,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:33,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:33,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:33,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:11:33,291 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)] === [2024-06-20 16:11:33,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:33,291 INFO L85 PathProgramCache]: Analyzing trace with hash -98671320, now seen corresponding path program 1 times [2024-06-20 16:11:33,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:33,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352922260] [2024-06-20 16:11:33,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:33,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:34,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:34,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352922260] [2024-06-20 16:11:34,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352922260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:34,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:34,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:11:34,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607871889] [2024-06-20 16:11:34,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:34,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:11:34,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:34,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:11:34,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:11:34,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:11:34,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 174 transitions, 1527 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:34,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:34,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:11:34,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:34,963 INFO L124 PetriNetUnfolderBase]: 2445/3772 cut-off events. [2024-06-20 16:11:34,963 INFO L125 PetriNetUnfolderBase]: For 59304/59320 co-relation queries the response was YES. [2024-06-20 16:11:34,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19099 conditions, 3772 events. 2445/3772 cut-off events. For 59304/59320 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19388 event pairs, 1050 based on Foata normal form. 6/3734 useless extension candidates. Maximal degree in co-relation 19055. Up to 3345 conditions per place. [2024-06-20 16:11:34,988 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 144 selfloop transitions, 65 changer transitions 0/223 dead transitions. [2024-06-20 16:11:34,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 223 transitions, 2323 flow [2024-06-20 16:11:34,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:11:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:11:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-20 16:11:34,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-20 16:11:34,990 INFO L175 Difference]: Start difference. First operand has 110 places, 174 transitions, 1527 flow. Second operand 10 states and 205 transitions. [2024-06-20 16:11:34,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 223 transitions, 2323 flow [2024-06-20 16:11:35,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 223 transitions, 2293 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 16:11:35,025 INFO L231 Difference]: Finished difference. Result has 119 places, 189 transitions, 1836 flow [2024-06-20 16:11:35,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1497, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1836, PETRI_PLACES=119, PETRI_TRANSITIONS=189} [2024-06-20 16:11:35,025 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 74 predicate places. [2024-06-20 16:11:35,025 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 189 transitions, 1836 flow [2024-06-20 16:11:35,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:35,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:35,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:35,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:11:35,026 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)] === [2024-06-20 16:11:35,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:35,026 INFO L85 PathProgramCache]: Analyzing trace with hash -286241539, now seen corresponding path program 1 times [2024-06-20 16:11:35,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:35,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304934753] [2024-06-20 16:11:35,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:35,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:35,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:35,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:35,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304934753] [2024-06-20 16:11:35,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304934753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:35,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:35,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:35,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427576406] [2024-06-20 16:11:35,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:35,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:35,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:35,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:35,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:35,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:11:35,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 189 transitions, 1836 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:35,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:35,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:11:35,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:36,859 INFO L124 PetriNetUnfolderBase]: 2545/3893 cut-off events. [2024-06-20 16:11:36,859 INFO L125 PetriNetUnfolderBase]: For 64807/64811 co-relation queries the response was YES. [2024-06-20 16:11:36,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20472 conditions, 3893 events. 2545/3893 cut-off events. For 64807/64811 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 19549 event pairs, 1097 based on Foata normal form. 6/3896 useless extension candidates. Maximal degree in co-relation 20425. Up to 3588 conditions per place. [2024-06-20 16:11:36,884 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 165 selfloop transitions, 67 changer transitions 0/237 dead transitions. [2024-06-20 16:11:36,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 237 transitions, 2700 flow [2024-06-20 16:11:36,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:11:36,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:11:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-20 16:11:36,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43388429752066116 [2024-06-20 16:11:36,886 INFO L175 Difference]: Start difference. First operand has 119 places, 189 transitions, 1836 flow. Second operand 11 states and 210 transitions. [2024-06-20 16:11:36,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 237 transitions, 2700 flow [2024-06-20 16:11:36,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 237 transitions, 2631 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-20 16:11:36,941 INFO L231 Difference]: Finished difference. Result has 128 places, 199 transitions, 2058 flow [2024-06-20 16:11:36,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1767, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2058, PETRI_PLACES=128, PETRI_TRANSITIONS=199} [2024-06-20 16:11:36,942 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 83 predicate places. [2024-06-20 16:11:36,942 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 199 transitions, 2058 flow [2024-06-20 16:11:36,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:36,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:36,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:36,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:11:36,943 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)] === [2024-06-20 16:11:36,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:36,943 INFO L85 PathProgramCache]: Analyzing trace with hash -2049418252, now seen corresponding path program 2 times [2024-06-20 16:11:36,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:36,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289802117] [2024-06-20 16:11:36,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:36,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:38,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:38,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289802117] [2024-06-20 16:11:38,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289802117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:38,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:38,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:38,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132930673] [2024-06-20 16:11:38,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:38,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:38,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:38,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:38,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:38,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:11:38,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 199 transitions, 2058 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:38,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:38,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:11:38,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:39,001 INFO L124 PetriNetUnfolderBase]: 2489/3867 cut-off events. [2024-06-20 16:11:39,001 INFO L125 PetriNetUnfolderBase]: For 73323/73327 co-relation queries the response was YES. [2024-06-20 16:11:39,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21308 conditions, 3867 events. 2489/3867 cut-off events. For 73323/73327 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 20004 event pairs, 990 based on Foata normal form. 7/3856 useless extension candidates. Maximal degree in co-relation 21258. Up to 3473 conditions per place. [2024-06-20 16:11:39,027 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 166 selfloop transitions, 63 changer transitions 0/246 dead transitions. [2024-06-20 16:11:39,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 246 transitions, 2785 flow [2024-06-20 16:11:39,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:11:39,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:11:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-20 16:11:39,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-20 16:11:39,029 INFO L175 Difference]: Start difference. First operand has 128 places, 199 transitions, 2058 flow. Second operand 10 states and 200 transitions. [2024-06-20 16:11:39,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 246 transitions, 2785 flow [2024-06-20 16:11:39,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 246 transitions, 2679 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 16:11:39,075 INFO L231 Difference]: Finished difference. Result has 133 places, 214 transitions, 2271 flow [2024-06-20 16:11:39,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1952, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2271, PETRI_PLACES=133, PETRI_TRANSITIONS=214} [2024-06-20 16:11:39,076 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 88 predicate places. [2024-06-20 16:11:39,076 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 214 transitions, 2271 flow [2024-06-20 16:11:39,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:39,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:39,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:39,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:11:39,077 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)] === [2024-06-20 16:11:39,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:39,077 INFO L85 PathProgramCache]: Analyzing trace with hash -103953933, now seen corresponding path program 2 times [2024-06-20 16:11:39,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:39,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710810056] [2024-06-20 16:11:39,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:39,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:40,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:40,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710810056] [2024-06-20 16:11:40,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710810056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:40,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:40,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:40,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438869886] [2024-06-20 16:11:40,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:40,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:40,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:40,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:40,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:40,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:11:40,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 214 transitions, 2271 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:40,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:40,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:11:40,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:40,876 INFO L124 PetriNetUnfolderBase]: 2614/4006 cut-off events. [2024-06-20 16:11:40,876 INFO L125 PetriNetUnfolderBase]: For 79198/79202 co-relation queries the response was YES. [2024-06-20 16:11:40,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22466 conditions, 4006 events. 2614/4006 cut-off events. For 79198/79202 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 20203 event pairs, 1048 based on Foata normal form. 7/4011 useless extension candidates. Maximal degree in co-relation 22413. Up to 3734 conditions per place. [2024-06-20 16:11:40,906 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 188 selfloop transitions, 57 changer transitions 0/250 dead transitions. [2024-06-20 16:11:40,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 250 transitions, 2966 flow [2024-06-20 16:11:40,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:11:40,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:11:40,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 16:11:40,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-20 16:11:40,907 INFO L175 Difference]: Start difference. First operand has 133 places, 214 transitions, 2271 flow. Second operand 9 states and 173 transitions. [2024-06-20 16:11:40,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 250 transitions, 2966 flow [2024-06-20 16:11:40,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 250 transitions, 2816 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-20 16:11:40,963 INFO L231 Difference]: Finished difference. Result has 135 places, 223 transitions, 2360 flow [2024-06-20 16:11:40,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2121, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2360, PETRI_PLACES=135, PETRI_TRANSITIONS=223} [2024-06-20 16:11:40,963 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 90 predicate places. [2024-06-20 16:11:40,963 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 223 transitions, 2360 flow [2024-06-20 16:11:40,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:40,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:40,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:40,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:11:40,964 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)] === [2024-06-20 16:11:40,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:40,965 INFO L85 PathProgramCache]: Analyzing trace with hash -103809938, now seen corresponding path program 3 times [2024-06-20 16:11:40,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:40,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919251326] [2024-06-20 16:11:40,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:40,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:41,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:41,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919251326] [2024-06-20 16:11:41,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919251326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:41,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:41,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:41,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148641788] [2024-06-20 16:11:41,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:41,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:41,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:41,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:41,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:42,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:11:42,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 223 transitions, 2360 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:42,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:42,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:11:42,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:42,894 INFO L124 PetriNetUnfolderBase]: 2529/3924 cut-off events. [2024-06-20 16:11:42,894 INFO L125 PetriNetUnfolderBase]: For 86954/86962 co-relation queries the response was YES. [2024-06-20 16:11:42,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22475 conditions, 3924 events. 2529/3924 cut-off events. For 86954/86962 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 20303 event pairs, 1002 based on Foata normal form. 8/3913 useless extension candidates. Maximal degree in co-relation 22421. Up to 3439 conditions per place. [2024-06-20 16:11:42,917 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 137 selfloop transitions, 97 changer transitions 0/254 dead transitions. [2024-06-20 16:11:42,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 254 transitions, 3024 flow [2024-06-20 16:11:42,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:11:42,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:11:42,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-20 16:11:42,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-20 16:11:42,918 INFO L175 Difference]: Start difference. First operand has 135 places, 223 transitions, 2360 flow. Second operand 9 states and 184 transitions. [2024-06-20 16:11:42,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 254 transitions, 3024 flow [2024-06-20 16:11:42,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 254 transitions, 2875 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-20 16:11:42,969 INFO L231 Difference]: Finished difference. Result has 137 places, 226 transitions, 2462 flow [2024-06-20 16:11:42,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2211, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2462, PETRI_PLACES=137, PETRI_TRANSITIONS=226} [2024-06-20 16:11:42,969 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-20 16:11:42,970 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 226 transitions, 2462 flow [2024-06-20 16:11:42,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:42,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:42,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:42,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:11:42,970 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)] === [2024-06-20 16:11:42,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:42,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1295151873, now seen corresponding path program 3 times [2024-06-20 16:11:42,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:42,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425551953] [2024-06-20 16:11:42,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:42,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:43,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:43,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425551953] [2024-06-20 16:11:43,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425551953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:43,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:43,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:43,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304372116] [2024-06-20 16:11:43,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:43,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:43,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:43,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:43,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:43,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:11:43,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 226 transitions, 2462 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:43,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:43,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:11:43,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:44,874 INFO L124 PetriNetUnfolderBase]: 2662/4073 cut-off events. [2024-06-20 16:11:44,875 INFO L125 PetriNetUnfolderBase]: For 96150/96158 co-relation queries the response was YES. [2024-06-20 16:11:44,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24076 conditions, 4073 events. 2662/4073 cut-off events. For 96150/96158 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 20640 event pairs, 1062 based on Foata normal form. 6/4076 useless extension candidates. Maximal degree in co-relation 24021. Up to 3530 conditions per place. [2024-06-20 16:11:44,902 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 142 selfloop transitions, 126 changer transitions 0/273 dead transitions. [2024-06-20 16:11:44,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 273 transitions, 3583 flow [2024-06-20 16:11:44,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:11:44,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:11:44,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-20 16:11:44,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-20 16:11:44,904 INFO L175 Difference]: Start difference. First operand has 137 places, 226 transitions, 2462 flow. Second operand 9 states and 186 transitions. [2024-06-20 16:11:44,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 273 transitions, 3583 flow [2024-06-20 16:11:44,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 273 transitions, 3358 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 16:11:44,964 INFO L231 Difference]: Finished difference. Result has 140 places, 240 transitions, 2751 flow [2024-06-20 16:11:44,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2237, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2751, PETRI_PLACES=140, PETRI_TRANSITIONS=240} [2024-06-20 16:11:44,965 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-20 16:11:44,965 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 240 transitions, 2751 flow [2024-06-20 16:11:44,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:44,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:44,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:44,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:11:44,966 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)] === [2024-06-20 16:11:44,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:44,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1295146293, now seen corresponding path program 4 times [2024-06-20 16:11:44,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:44,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900917112] [2024-06-20 16:11:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:44,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:45,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:45,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900917112] [2024-06-20 16:11:45,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900917112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:45,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:45,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:45,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27036705] [2024-06-20 16:11:45,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:45,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:45,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:45,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:45,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:45,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:11:45,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 240 transitions, 2751 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:45,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:45,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:11:45,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:46,752 INFO L124 PetriNetUnfolderBase]: 2657/4066 cut-off events. [2024-06-20 16:11:46,753 INFO L125 PetriNetUnfolderBase]: For 105258/105266 co-relation queries the response was YES. [2024-06-20 16:11:46,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24897 conditions, 4066 events. 2657/4066 cut-off events. For 105258/105266 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 20592 event pairs, 1062 based on Foata normal form. 6/4069 useless extension candidates. Maximal degree in co-relation 24840. Up to 3525 conditions per place. [2024-06-20 16:11:46,783 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 134 selfloop transitions, 132 changer transitions 0/271 dead transitions. [2024-06-20 16:11:46,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 271 transitions, 3589 flow [2024-06-20 16:11:46,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:11:46,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:11:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-20 16:11:46,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-20 16:11:46,784 INFO L175 Difference]: Start difference. First operand has 140 places, 240 transitions, 2751 flow. Second operand 9 states and 183 transitions. [2024-06-20 16:11:46,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 271 transitions, 3589 flow [2024-06-20 16:11:46,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 271 transitions, 3450 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-20 16:11:46,856 INFO L231 Difference]: Finished difference. Result has 146 places, 240 transitions, 2894 flow [2024-06-20 16:11:46,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2622, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2894, PETRI_PLACES=146, PETRI_TRANSITIONS=240} [2024-06-20 16:11:46,857 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 101 predicate places. [2024-06-20 16:11:46,857 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 240 transitions, 2894 flow [2024-06-20 16:11:46,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:46,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:46,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:46,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:11:46,858 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)] === [2024-06-20 16:11:46,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:46,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1295146076, now seen corresponding path program 1 times [2024-06-20 16:11:46,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:46,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570698180] [2024-06-20 16:11:46,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:46,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:47,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:47,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570698180] [2024-06-20 16:11:47,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570698180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:47,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:47,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:47,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748861549] [2024-06-20 16:11:47,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:47,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:47,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:47,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:47,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:47,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:11:47,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 240 transitions, 2894 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:47,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:47,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:11:47,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:48,685 INFO L124 PetriNetUnfolderBase]: 2699/4133 cut-off events. [2024-06-20 16:11:48,686 INFO L125 PetriNetUnfolderBase]: For 112063/112070 co-relation queries the response was YES. [2024-06-20 16:11:48,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25472 conditions, 4133 events. 2699/4133 cut-off events. For 112063/112070 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 20976 event pairs, 1075 based on Foata normal form. 8/4138 useless extension candidates. Maximal degree in co-relation 25413. Up to 3762 conditions per place. [2024-06-20 16:11:48,715 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 219 selfloop transitions, 62 changer transitions 0/286 dead transitions. [2024-06-20 16:11:48,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 286 transitions, 3902 flow [2024-06-20 16:11:48,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:11:48,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:11:48,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-20 16:11:48,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-20 16:11:48,717 INFO L175 Difference]: Start difference. First operand has 146 places, 240 transitions, 2894 flow. Second operand 9 states and 184 transitions. [2024-06-20 16:11:48,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 286 transitions, 3902 flow [2024-06-20 16:11:48,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 286 transitions, 3626 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 16:11:48,805 INFO L231 Difference]: Finished difference. Result has 149 places, 253 transitions, 2942 flow [2024-06-20 16:11:48,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2618, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2942, PETRI_PLACES=149, PETRI_TRANSITIONS=253} [2024-06-20 16:11:48,806 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 104 predicate places. [2024-06-20 16:11:48,806 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 253 transitions, 2942 flow [2024-06-20 16:11:48,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:48,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:48,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:48,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:11:48,807 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)] === [2024-06-20 16:11:48,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:48,807 INFO L85 PathProgramCache]: Analyzing trace with hash 503920764, now seen corresponding path program 4 times [2024-06-20 16:11:48,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:48,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760187410] [2024-06-20 16:11:48,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:48,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:50,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:50,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760187410] [2024-06-20 16:11:50,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760187410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:50,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:50,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:50,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495953930] [2024-06-20 16:11:50,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:50,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:50,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:50,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:50,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:50,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:11:50,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 253 transitions, 2942 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:50,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:50,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:11:50,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:51,102 INFO L124 PetriNetUnfolderBase]: 2611/4028 cut-off events. [2024-06-20 16:11:51,102 INFO L125 PetriNetUnfolderBase]: For 127806/127833 co-relation queries the response was YES. [2024-06-20 16:11:51,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26257 conditions, 4028 events. 2611/4028 cut-off events. For 127806/127833 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20852 event pairs, 999 based on Foata normal form. 7/4002 useless extension candidates. Maximal degree in co-relation 26195. Up to 3539 conditions per place. [2024-06-20 16:11:51,134 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 179 selfloop transitions, 72 changer transitions 0/275 dead transitions. [2024-06-20 16:11:51,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 275 transitions, 3574 flow [2024-06-20 16:11:51,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:11:51,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:11:51,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-20 16:11:51,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2024-06-20 16:11:51,135 INFO L175 Difference]: Start difference. First operand has 149 places, 253 transitions, 2942 flow. Second operand 7 states and 146 transitions. [2024-06-20 16:11:51,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 275 transitions, 3574 flow [2024-06-20 16:11:51,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 275 transitions, 3481 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-20 16:11:51,239 INFO L231 Difference]: Finished difference. Result has 153 places, 253 transitions, 3041 flow [2024-06-20 16:11:51,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2849, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3041, PETRI_PLACES=153, PETRI_TRANSITIONS=253} [2024-06-20 16:11:51,240 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 108 predicate places. [2024-06-20 16:11:51,240 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 253 transitions, 3041 flow [2024-06-20 16:11:51,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:51,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:51,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:51,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:11:51,241 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)] === [2024-06-20 16:11:51,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:51,241 INFO L85 PathProgramCache]: Analyzing trace with hash -719612952, now seen corresponding path program 1 times [2024-06-20 16:11:51,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:51,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082257071] [2024-06-20 16:11:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:51,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:52,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:52,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082257071] [2024-06-20 16:11:52,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082257071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:52,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:52,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:11:52,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115331442] [2024-06-20 16:11:52,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:52,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:11:52,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:52,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:11:52,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:11:52,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:11:52,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 253 transitions, 3041 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:11:52,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:52,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:11:52,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:53,225 INFO L124 PetriNetUnfolderBase]: 2713/4159 cut-off events. [2024-06-20 16:11:53,226 INFO L125 PetriNetUnfolderBase]: For 129545/129549 co-relation queries the response was YES. [2024-06-20 16:11:53,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27002 conditions, 4159 events. 2713/4159 cut-off events. For 129545/129549 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 21116 event pairs, 1011 based on Foata normal form. 8/4165 useless extension candidates. Maximal degree in co-relation 26937. Up to 3853 conditions per place. [2024-06-20 16:11:53,253 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 222 selfloop transitions, 60 changer transitions 0/287 dead transitions. [2024-06-20 16:11:53,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 287 transitions, 3791 flow [2024-06-20 16:11:53,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:11:53,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:11:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-20 16:11:53,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2024-06-20 16:11:53,255 INFO L175 Difference]: Start difference. First operand has 153 places, 253 transitions, 3041 flow. Second operand 10 states and 191 transitions. [2024-06-20 16:11:53,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 287 transitions, 3791 flow [2024-06-20 16:11:53,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 287 transitions, 3588 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 16:11:53,345 INFO L231 Difference]: Finished difference. Result has 155 places, 256 transitions, 3018 flow [2024-06-20 16:11:53,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2838, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3018, PETRI_PLACES=155, PETRI_TRANSITIONS=256} [2024-06-20 16:11:53,345 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 110 predicate places. [2024-06-20 16:11:53,345 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 256 transitions, 3018 flow [2024-06-20 16:11:53,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:11:53,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:53,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:53,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:11:53,346 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)] === [2024-06-20 16:11:53,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:53,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1838406531, now seen corresponding path program 5 times [2024-06-20 16:11:53,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:53,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020073745] [2024-06-20 16:11:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:53,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:54,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:54,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020073745] [2024-06-20 16:11:54,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020073745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:54,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:54,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:54,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080309080] [2024-06-20 16:11:54,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:54,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:54,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:54,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:54,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:54,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:11:54,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 256 transitions, 3018 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:54,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:54,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:11:54,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:55,388 INFO L124 PetriNetUnfolderBase]: 2705/4138 cut-off events. [2024-06-20 16:11:55,388 INFO L125 PetriNetUnfolderBase]: For 114105/114109 co-relation queries the response was YES. [2024-06-20 16:11:55,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26444 conditions, 4138 events. 2705/4138 cut-off events. For 114105/114109 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 21003 event pairs, 1062 based on Foata normal form. 7/4142 useless extension candidates. Maximal degree in co-relation 26380. Up to 3815 conditions per place. [2024-06-20 16:11:55,419 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 202 selfloop transitions, 75 changer transitions 0/282 dead transitions. [2024-06-20 16:11:55,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 282 transitions, 3730 flow [2024-06-20 16:11:55,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:55,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-20 16:11:55,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-20 16:11:55,420 INFO L175 Difference]: Start difference. First operand has 155 places, 256 transitions, 3018 flow. Second operand 8 states and 155 transitions. [2024-06-20 16:11:55,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 282 transitions, 3730 flow [2024-06-20 16:11:55,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 282 transitions, 3542 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-20 16:11:55,517 INFO L231 Difference]: Finished difference. Result has 155 places, 256 transitions, 3010 flow [2024-06-20 16:11:55,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2830, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3010, PETRI_PLACES=155, PETRI_TRANSITIONS=256} [2024-06-20 16:11:55,518 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 110 predicate places. [2024-06-20 16:11:55,518 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 256 transitions, 3010 flow [2024-06-20 16:11:55,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:55,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:55,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:55,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:11:55,518 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)] === [2024-06-20 16:11:55,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:55,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1068960714, now seen corresponding path program 2 times [2024-06-20 16:11:55,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:55,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026111580] [2024-06-20 16:11:55,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:55,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:56,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:56,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026111580] [2024-06-20 16:11:56,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026111580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:56,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:56,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:56,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71315466] [2024-06-20 16:11:56,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:56,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:56,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:56,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:56,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:56,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:11:56,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 256 transitions, 3010 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:56,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:56,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:11:56,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:57,207 INFO L124 PetriNetUnfolderBase]: 2757/4232 cut-off events. [2024-06-20 16:11:57,207 INFO L125 PetriNetUnfolderBase]: For 123296/123303 co-relation queries the response was YES. [2024-06-20 16:11:57,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27289 conditions, 4232 events. 2757/4232 cut-off events. For 123296/123303 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 21615 event pairs, 1079 based on Foata normal form. 10/4239 useless extension candidates. Maximal degree in co-relation 27224. Up to 3814 conditions per place. [2024-06-20 16:11:57,239 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 222 selfloop transitions, 72 changer transitions 0/299 dead transitions. [2024-06-20 16:11:57,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 299 transitions, 4094 flow [2024-06-20 16:11:57,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:57,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-20 16:11:57,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-20 16:11:57,240 INFO L175 Difference]: Start difference. First operand has 155 places, 256 transitions, 3010 flow. Second operand 8 states and 162 transitions. [2024-06-20 16:11:57,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 299 transitions, 4094 flow [2024-06-20 16:11:57,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 299 transitions, 3933 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 16:11:57,340 INFO L231 Difference]: Finished difference. Result has 156 places, 267 transitions, 3205 flow [2024-06-20 16:11:57,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2857, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3205, PETRI_PLACES=156, PETRI_TRANSITIONS=267} [2024-06-20 16:11:57,340 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2024-06-20 16:11:57,341 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 267 transitions, 3205 flow [2024-06-20 16:11:57,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:57,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:57,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:57,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:11:57,341 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)] === [2024-06-20 16:11:57,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:57,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1838256801, now seen corresponding path program 6 times [2024-06-20 16:11:57,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:57,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420969810] [2024-06-20 16:11:57,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:57,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:58,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:58,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420969810] [2024-06-20 16:11:58,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420969810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:58,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:58,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:58,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096767427] [2024-06-20 16:11:58,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:58,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:58,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:58,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:58,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:58,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:11:58,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 267 transitions, 3205 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:58,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:58,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:11:58,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:59,104 INFO L124 PetriNetUnfolderBase]: 2836/4351 cut-off events. [2024-06-20 16:11:59,104 INFO L125 PetriNetUnfolderBase]: For 119407/119412 co-relation queries the response was YES. [2024-06-20 16:11:59,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28224 conditions, 4351 events. 2836/4351 cut-off events. For 119407/119412 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 22305 event pairs, 1200 based on Foata normal form. 3/4350 useless extension candidates. Maximal degree in co-relation 28159. Up to 3887 conditions per place. [2024-06-20 16:11:59,138 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 209 selfloop transitions, 110 changer transitions 0/324 dead transitions. [2024-06-20 16:11:59,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 324 transitions, 4562 flow [2024-06-20 16:11:59,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:11:59,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:11:59,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 16:11:59,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-20 16:11:59,139 INFO L175 Difference]: Start difference. First operand has 156 places, 267 transitions, 3205 flow. Second operand 9 states and 172 transitions. [2024-06-20 16:11:59,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 324 transitions, 4562 flow [2024-06-20 16:11:59,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 324 transitions, 4385 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-20 16:11:59,238 INFO L231 Difference]: Finished difference. Result has 161 places, 294 transitions, 3670 flow [2024-06-20 16:11:59,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3040, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3670, PETRI_PLACES=161, PETRI_TRANSITIONS=294} [2024-06-20 16:11:59,239 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 116 predicate places. [2024-06-20 16:11:59,239 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 294 transitions, 3670 flow [2024-06-20 16:11:59,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:59,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:59,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:59,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:11:59,239 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:59,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:59,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1838262381, now seen corresponding path program 7 times [2024-06-20 16:11:59,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:59,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795716172] [2024-06-20 16:11:59,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:59,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:00,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:00,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795716172] [2024-06-20 16:12:00,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795716172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:00,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:00,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:00,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638089596] [2024-06-20 16:12:00,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:00,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:00,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:00,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:00,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:00,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:12:00,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 294 transitions, 3670 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:00,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:00,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:12:00,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:01,000 INFO L124 PetriNetUnfolderBase]: 2828/4331 cut-off events. [2024-06-20 16:12:01,000 INFO L125 PetriNetUnfolderBase]: For 117035/117043 co-relation queries the response was YES. [2024-06-20 16:12:01,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27997 conditions, 4331 events. 2828/4331 cut-off events. For 117035/117043 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 22074 event pairs, 1025 based on Foata normal form. 7/4335 useless extension candidates. Maximal degree in co-relation 27930. Up to 3750 conditions per place. [2024-06-20 16:12:01,033 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 169 selfloop transitions, 151 changer transitions 0/325 dead transitions. [2024-06-20 16:12:01,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 325 transitions, 4650 flow [2024-06-20 16:12:01,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:12:01,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:12:01,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-20 16:12:01,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-20 16:12:01,039 INFO L175 Difference]: Start difference. First operand has 161 places, 294 transitions, 3670 flow. Second operand 8 states and 162 transitions. [2024-06-20 16:12:01,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 325 transitions, 4650 flow [2024-06-20 16:12:01,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 325 transitions, 4386 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-20 16:12:01,169 INFO L231 Difference]: Finished difference. Result has 164 places, 294 transitions, 3728 flow [2024-06-20 16:12:01,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3406, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3728, PETRI_PLACES=164, PETRI_TRANSITIONS=294} [2024-06-20 16:12:01,170 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 119 predicate places. [2024-06-20 16:12:01,170 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 294 transitions, 3728 flow [2024-06-20 16:12:01,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:01,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:01,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:01,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:12:01,170 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)] === [2024-06-20 16:12:01,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:01,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1068954762, now seen corresponding path program 5 times [2024-06-20 16:12:01,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:01,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242814029] [2024-06-20 16:12:01,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:01,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:02,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:02,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242814029] [2024-06-20 16:12:02,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242814029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:02,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:02,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:02,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654794982] [2024-06-20 16:12:02,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:02,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:02,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:02,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:02,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:02,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:12:02,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 294 transitions, 3728 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:02,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:02,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:12:02,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:03,012 INFO L124 PetriNetUnfolderBase]: 2725/4235 cut-off events. [2024-06-20 16:12:03,012 INFO L125 PetriNetUnfolderBase]: For 126717/126725 co-relation queries the response was YES. [2024-06-20 16:12:03,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28033 conditions, 4235 events. 2725/4235 cut-off events. For 126717/126725 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 22157 event pairs, 965 based on Foata normal form. 8/4224 useless extension candidates. Maximal degree in co-relation 27965. Up to 3684 conditions per place. [2024-06-20 16:12:03,053 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 193 selfloop transitions, 97 changer transitions 0/323 dead transitions. [2024-06-20 16:12:03,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 323 transitions, 4545 flow [2024-06-20 16:12:03,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:12:03,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:12:03,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-20 16:12:03,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-20 16:12:03,054 INFO L175 Difference]: Start difference. First operand has 164 places, 294 transitions, 3728 flow. Second operand 8 states and 163 transitions. [2024-06-20 16:12:03,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 323 transitions, 4545 flow [2024-06-20 16:12:03,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 323 transitions, 4227 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 16:12:03,196 INFO L231 Difference]: Finished difference. Result has 165 places, 297 transitions, 3676 flow [2024-06-20 16:12:03,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3410, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3676, PETRI_PLACES=165, PETRI_TRANSITIONS=297} [2024-06-20 16:12:03,196 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 120 predicate places. [2024-06-20 16:12:03,197 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 297 transitions, 3676 flow [2024-06-20 16:12:03,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:03,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:03,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:03,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:12:03,197 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)] === [2024-06-20 16:12:03,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:03,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1012261200, now seen corresponding path program 3 times [2024-06-20 16:12:03,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:03,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539537174] [2024-06-20 16:12:03,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:03,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:03,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:03,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539537174] [2024-06-20 16:12:03,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539537174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:03,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:03,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:03,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855414440] [2024-06-20 16:12:03,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:03,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:03,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:03,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:03,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:04,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:12:04,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 297 transitions, 3676 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:04,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:04,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:12:04,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:04,808 INFO L124 PetriNetUnfolderBase]: 2875/4414 cut-off events. [2024-06-20 16:12:04,808 INFO L125 PetriNetUnfolderBase]: For 128333/128335 co-relation queries the response was YES. [2024-06-20 16:12:04,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29083 conditions, 4414 events. 2875/4414 cut-off events. For 128333/128335 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 22708 event pairs, 1212 based on Foata normal form. 6/4417 useless extension candidates. Maximal degree in co-relation 29015. Up to 4083 conditions per place. [2024-06-20 16:12:04,848 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 287 selfloop transitions, 45 changer transitions 0/337 dead transitions. [2024-06-20 16:12:04,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 337 transitions, 4809 flow [2024-06-20 16:12:04,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:12:04,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:12:04,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 16:12:04,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-20 16:12:04,861 INFO L175 Difference]: Start difference. First operand has 165 places, 297 transitions, 3676 flow. Second operand 8 states and 157 transitions. [2024-06-20 16:12:04,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 337 transitions, 4809 flow [2024-06-20 16:12:04,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 337 transitions, 4585 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 16:12:04,974 INFO L231 Difference]: Finished difference. Result has 167 places, 305 transitions, 3704 flow [2024-06-20 16:12:04,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3452, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3704, PETRI_PLACES=167, PETRI_TRANSITIONS=305} [2024-06-20 16:12:04,975 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 122 predicate places. [2024-06-20 16:12:04,975 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 305 transitions, 3704 flow [2024-06-20 16:12:04,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:04,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:04,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:04,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:12:04,976 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)] === [2024-06-20 16:12:04,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:04,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1173143383, now seen corresponding path program 8 times [2024-06-20 16:12:04,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:04,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323907281] [2024-06-20 16:12:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:04,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:05,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:05,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323907281] [2024-06-20 16:12:05,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323907281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:05,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:05,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:05,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439398009] [2024-06-20 16:12:05,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:05,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:05,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:05,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:05,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:05,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:12:05,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 305 transitions, 3704 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:05,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:05,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:12:05,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:06,728 INFO L124 PetriNetUnfolderBase]: 2919/4479 cut-off events. [2024-06-20 16:12:06,728 INFO L125 PetriNetUnfolderBase]: For 137033/137035 co-relation queries the response was YES. [2024-06-20 16:12:06,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29794 conditions, 4479 events. 2919/4479 cut-off events. For 137033/137035 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 23077 event pairs, 1212 based on Foata normal form. 3/4479 useless extension candidates. Maximal degree in co-relation 29725. Up to 4163 conditions per place. [2024-06-20 16:12:06,763 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 292 selfloop transitions, 50 changer transitions 0/347 dead transitions. [2024-06-20 16:12:06,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 347 transitions, 5030 flow [2024-06-20 16:12:06,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:12:06,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:12:06,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 16:12:06,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-20 16:12:06,765 INFO L175 Difference]: Start difference. First operand has 167 places, 305 transitions, 3704 flow. Second operand 9 states and 168 transitions. [2024-06-20 16:12:06,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 347 transitions, 5030 flow [2024-06-20 16:12:06,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 347 transitions, 4823 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-20 16:12:06,895 INFO L231 Difference]: Finished difference. Result has 170 places, 317 transitions, 3827 flow [2024-06-20 16:12:06,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3497, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3827, PETRI_PLACES=170, PETRI_TRANSITIONS=317} [2024-06-20 16:12:06,895 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 125 predicate places. [2024-06-20 16:12:06,895 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 317 transitions, 3827 flow [2024-06-20 16:12:06,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:06,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:06,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:06,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:12:06,896 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)] === [2024-06-20 16:12:06,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:06,896 INFO L85 PathProgramCache]: Analyzing trace with hash 703370424, now seen corresponding path program 6 times [2024-06-20 16:12:06,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:06,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555705523] [2024-06-20 16:12:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:06,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:07,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:07,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555705523] [2024-06-20 16:12:07,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555705523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:07,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:07,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:07,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531895929] [2024-06-20 16:12:07,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:07,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:07,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:07,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:07,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:08,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:12:08,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 317 transitions, 3827 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:08,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:08,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:12:08,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:08,799 INFO L124 PetriNetUnfolderBase]: 2798/4349 cut-off events. [2024-06-20 16:12:08,799 INFO L125 PetriNetUnfolderBase]: For 146572/146579 co-relation queries the response was YES. [2024-06-20 16:12:08,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29405 conditions, 4349 events. 2798/4349 cut-off events. For 146572/146579 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 22997 event pairs, 1146 based on Foata normal form. 3/4329 useless extension candidates. Maximal degree in co-relation 29336. Up to 3959 conditions per place. [2024-06-20 16:12:08,839 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 281 selfloop transitions, 24 changer transitions 0/342 dead transitions. [2024-06-20 16:12:08,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 342 transitions, 4634 flow [2024-06-20 16:12:08,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:12:08,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:12:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 16:12:08,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-20 16:12:08,840 INFO L175 Difference]: Start difference. First operand has 170 places, 317 transitions, 3827 flow. Second operand 8 states and 156 transitions. [2024-06-20 16:12:08,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 342 transitions, 4634 flow [2024-06-20 16:12:08,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 342 transitions, 4350 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-20 16:12:08,985 INFO L231 Difference]: Finished difference. Result has 171 places, 320 transitions, 3664 flow [2024-06-20 16:12:08,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3543, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3664, PETRI_PLACES=171, PETRI_TRANSITIONS=320} [2024-06-20 16:12:08,985 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 126 predicate places. [2024-06-20 16:12:08,986 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 320 transitions, 3664 flow [2024-06-20 16:12:08,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:08,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:08,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:08,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:12:08,986 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)] === [2024-06-20 16:12:08,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:08,987 INFO L85 PathProgramCache]: Analyzing trace with hash 703370579, now seen corresponding path program 9 times [2024-06-20 16:12:08,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:08,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338658587] [2024-06-20 16:12:08,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:08,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:09,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:09,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338658587] [2024-06-20 16:12:09,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338658587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:09,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:09,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:09,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438931946] [2024-06-20 16:12:09,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:09,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:09,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:09,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:09,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:09,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:12:09,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 320 transitions, 3664 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:09,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:09,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:12:09,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:10,618 INFO L124 PetriNetUnfolderBase]: 2906/4456 cut-off events. [2024-06-20 16:12:10,619 INFO L125 PetriNetUnfolderBase]: For 150539/150541 co-relation queries the response was YES. [2024-06-20 16:12:10,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29955 conditions, 4456 events. 2906/4456 cut-off events. For 150539/150541 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 22909 event pairs, 1212 based on Foata normal form. 3/4456 useless extension candidates. Maximal degree in co-relation 29886. Up to 4148 conditions per place. [2024-06-20 16:12:10,656 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 290 selfloop transitions, 51 changer transitions 0/346 dead transitions. [2024-06-20 16:12:10,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 346 transitions, 4636 flow [2024-06-20 16:12:10,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:12:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:12:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 16:12:10,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 16:12:10,658 INFO L175 Difference]: Start difference. First operand has 171 places, 320 transitions, 3664 flow. Second operand 8 states and 154 transitions. [2024-06-20 16:12:10,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 346 transitions, 4636 flow [2024-06-20 16:12:10,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 346 transitions, 4501 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-20 16:12:10,790 INFO L231 Difference]: Finished difference. Result has 173 places, 320 transitions, 3643 flow [2024-06-20 16:12:10,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3529, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3643, PETRI_PLACES=173, PETRI_TRANSITIONS=320} [2024-06-20 16:12:10,791 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 128 predicate places. [2024-06-20 16:12:10,791 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 320 transitions, 3643 flow [2024-06-20 16:12:10,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:10,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:10,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:10,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:12:10,791 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)] === [2024-06-20 16:12:10,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:10,792 INFO L85 PathProgramCache]: Analyzing trace with hash 710994936, now seen corresponding path program 4 times [2024-06-20 16:12:10,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:10,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389488538] [2024-06-20 16:12:10,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:10,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:11,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:11,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389488538] [2024-06-20 16:12:11,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389488538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:11,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:11,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:11,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640575542] [2024-06-20 16:12:11,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:11,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:11,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:11,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:11,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:11,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:12:11,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 320 transitions, 3643 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:11,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:11,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:12:11,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:12,461 INFO L124 PetriNetUnfolderBase]: 2942/4514 cut-off events. [2024-06-20 16:12:12,461 INFO L125 PetriNetUnfolderBase]: For 161336/161338 co-relation queries the response was YES. [2024-06-20 16:12:12,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30623 conditions, 4514 events. 2942/4514 cut-off events. For 161336/161338 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 23340 event pairs, 1214 based on Foata normal form. 6/4517 useless extension candidates. Maximal degree in co-relation 30553. Up to 4261 conditions per place. [2024-06-20 16:12:12,500 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 325 selfloop transitions, 23 changer transitions 0/353 dead transitions. [2024-06-20 16:12:12,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 353 transitions, 4649 flow [2024-06-20 16:12:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:12:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:12:12,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 16:12:12,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-20 16:12:12,501 INFO L175 Difference]: Start difference. First operand has 173 places, 320 transitions, 3643 flow. Second operand 8 states and 150 transitions. [2024-06-20 16:12:12,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 353 transitions, 4649 flow [2024-06-20 16:12:12,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 353 transitions, 4543 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 16:12:12,643 INFO L231 Difference]: Finished difference. Result has 175 places, 328 transitions, 3754 flow [2024-06-20 16:12:12,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3537, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3754, PETRI_PLACES=175, PETRI_TRANSITIONS=328} [2024-06-20 16:12:12,644 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 130 predicate places. [2024-06-20 16:12:12,644 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 328 transitions, 3754 flow [2024-06-20 16:12:12,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:12,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:12,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:12,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:12:12,644 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)] === [2024-06-20 16:12:12,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:12,645 INFO L85 PathProgramCache]: Analyzing trace with hash 710727809, now seen corresponding path program 10 times [2024-06-20 16:12:12,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:12,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933770115] [2024-06-20 16:12:12,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:12,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:13,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:13,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933770115] [2024-06-20 16:12:13,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933770115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:13,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:13,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:13,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960194872] [2024-06-20 16:12:13,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:13,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:13,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:13,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:13,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:13,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:12:13,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 328 transitions, 3754 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:13,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:13,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:12:13,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:14,354 INFO L124 PetriNetUnfolderBase]: 2934/4503 cut-off events. [2024-06-20 16:12:14,355 INFO L125 PetriNetUnfolderBase]: For 167861/167863 co-relation queries the response was YES. [2024-06-20 16:12:14,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30752 conditions, 4503 events. 2934/4503 cut-off events. For 167861/167863 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 23258 event pairs, 1214 based on Foata normal form. 3/4503 useless extension candidates. Maximal degree in co-relation 30681. Up to 4259 conditions per place. [2024-06-20 16:12:14,394 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 321 selfloop transitions, 24 changer transitions 0/350 dead transitions. [2024-06-20 16:12:14,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 350 transitions, 4586 flow [2024-06-20 16:12:14,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:12:14,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:12:14,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:12:14,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-20 16:12:14,395 INFO L175 Difference]: Start difference. First operand has 175 places, 328 transitions, 3754 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:12:14,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 350 transitions, 4586 flow [2024-06-20 16:12:14,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 350 transitions, 4413 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-20 16:12:14,548 INFO L231 Difference]: Finished difference. Result has 177 places, 328 transitions, 3641 flow [2024-06-20 16:12:14,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3581, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3641, PETRI_PLACES=177, PETRI_TRANSITIONS=328} [2024-06-20 16:12:14,549 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 132 predicate places. [2024-06-20 16:12:14,549 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 328 transitions, 3641 flow [2024-06-20 16:12:14,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:14,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:14,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:14,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:12:14,549 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)] === [2024-06-20 16:12:14,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:14,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1213053054, now seen corresponding path program 5 times [2024-06-20 16:12:14,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:14,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465661684] [2024-06-20 16:12:14,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:14,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:15,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:15,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465661684] [2024-06-20 16:12:15,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465661684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:15,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:15,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:15,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908197513] [2024-06-20 16:12:15,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:15,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:15,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:15,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:15,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:15,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:12:15,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 328 transitions, 3641 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:15,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:15,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:12:15,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:16,475 INFO L124 PetriNetUnfolderBase]: 2918/4481 cut-off events. [2024-06-20 16:12:16,476 INFO L125 PetriNetUnfolderBase]: For 174439/174441 co-relation queries the response was YES. [2024-06-20 16:12:16,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30550 conditions, 4481 events. 2918/4481 cut-off events. For 174439/174441 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 23182 event pairs, 1211 based on Foata normal form. 6/4484 useless extension candidates. Maximal degree in co-relation 30478. Up to 4189 conditions per place. [2024-06-20 16:12:16,516 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 316 selfloop transitions, 36 changer transitions 0/357 dead transitions. [2024-06-20 16:12:16,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 357 transitions, 4550 flow [2024-06-20 16:12:16,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:12:16,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:12:16,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 16:12:16,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-20 16:12:16,517 INFO L175 Difference]: Start difference. First operand has 177 places, 328 transitions, 3641 flow. Second operand 8 states and 153 transitions. [2024-06-20 16:12:16,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 357 transitions, 4550 flow [2024-06-20 16:12:16,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 357 transitions, 4400 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-20 16:12:16,682 INFO L231 Difference]: Finished difference. Result has 177 places, 328 transitions, 3577 flow [2024-06-20 16:12:16,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3491, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3577, PETRI_PLACES=177, PETRI_TRANSITIONS=328} [2024-06-20 16:12:16,683 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 132 predicate places. [2024-06-20 16:12:16,683 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 328 transitions, 3577 flow [2024-06-20 16:12:16,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:16,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:16,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:16,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:12:16,684 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:16,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:16,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1817676521, now seen corresponding path program 1 times [2024-06-20 16:12:16,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:16,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482578970] [2024-06-20 16:12:16,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:16,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:17,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:17,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482578970] [2024-06-20 16:12:17,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482578970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:17,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:17,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:12:17,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532627302] [2024-06-20 16:12:17,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:17,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:12:17,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:17,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:12:17,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:12:17,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:12:17,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 328 transitions, 3577 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) [2024-06-20 16:12:17,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:17,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:12:17,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:18,463 INFO L124 PetriNetUnfolderBase]: 3260/5000 cut-off events. [2024-06-20 16:12:18,463 INFO L125 PetriNetUnfolderBase]: For 238600/238619 co-relation queries the response was YES. [2024-06-20 16:12:18,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35404 conditions, 5000 events. 3260/5000 cut-off events. For 238600/238619 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 26208 event pairs, 1552 based on Foata normal form. 9/4981 useless extension candidates. Maximal degree in co-relation 35331. Up to 4665 conditions per place. [2024-06-20 16:12:18,515 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 262 selfloop transitions, 12 changer transitions 0/339 dead transitions. [2024-06-20 16:12:18,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 339 transitions, 4189 flow [2024-06-20 16:12:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:12:18,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:12:18,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-20 16:12:18,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-20 16:12:18,517 INFO L175 Difference]: Start difference. First operand has 177 places, 328 transitions, 3577 flow. Second operand 6 states and 108 transitions. [2024-06-20 16:12:18,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 339 transitions, 4189 flow [2024-06-20 16:12:18,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 339 transitions, 4036 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-20 16:12:18,779 INFO L231 Difference]: Finished difference. Result has 176 places, 331 transitions, 3486 flow [2024-06-20 16:12:18,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3424, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3486, PETRI_PLACES=176, PETRI_TRANSITIONS=331} [2024-06-20 16:12:18,780 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 131 predicate places. [2024-06-20 16:12:18,780 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 331 transitions, 3486 flow [2024-06-20 16:12:18,780 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) [2024-06-20 16:12:18,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:18,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:18,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:12:18,780 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)] === [2024-06-20 16:12:18,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:18,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1983693552, now seen corresponding path program 1 times [2024-06-20 16:12:18,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:18,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394187309] [2024-06-20 16:12:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:18,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:19,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:19,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394187309] [2024-06-20 16:12:19,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394187309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:19,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:19,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:19,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650154643] [2024-06-20 16:12:19,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:19,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:19,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:19,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:19,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:19,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:12:19,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 331 transitions, 3486 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:19,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:19,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:12:19,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:20,654 INFO L124 PetriNetUnfolderBase]: 3015/4640 cut-off events. [2024-06-20 16:12:20,654 INFO L125 PetriNetUnfolderBase]: For 224153/224215 co-relation queries the response was YES. [2024-06-20 16:12:20,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33770 conditions, 4640 events. 3015/4640 cut-off events. For 224153/224215 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 24701 event pairs, 869 based on Foata normal form. 12/4599 useless extension candidates. Maximal degree in co-relation 33696. Up to 3942 conditions per place. [2024-06-20 16:12:20,700 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 259 selfloop transitions, 83 changer transitions 0/380 dead transitions. [2024-06-20 16:12:20,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 380 transitions, 4740 flow [2024-06-20 16:12:20,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:12:20,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:12:20,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-20 16:12:20,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-20 16:12:20,702 INFO L175 Difference]: Start difference. First operand has 176 places, 331 transitions, 3486 flow. Second operand 10 states and 206 transitions. [2024-06-20 16:12:20,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 380 transitions, 4740 flow [2024-06-20 16:12:20,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 380 transitions, 4700 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 16:12:20,905 INFO L231 Difference]: Finished difference. Result has 184 places, 340 transitions, 3820 flow [2024-06-20 16:12:20,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3446, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3820, PETRI_PLACES=184, PETRI_TRANSITIONS=340} [2024-06-20 16:12:20,906 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 139 predicate places. [2024-06-20 16:12:20,906 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 340 transitions, 3820 flow [2024-06-20 16:12:20,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:20,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:20,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:20,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:12:20,906 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)] === [2024-06-20 16:12:20,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:20,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1494827770, now seen corresponding path program 2 times [2024-06-20 16:12:20,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:20,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793565414] [2024-06-20 16:12:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:20,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:21,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:21,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793565414] [2024-06-20 16:12:21,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793565414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:21,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:21,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:12:21,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305036131] [2024-06-20 16:12:21,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:21,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:12:21,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:21,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:12:21,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:12:21,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:12:21,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 340 transitions, 3820 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:12:21,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:21,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:12:21,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:23,147 INFO L124 PetriNetUnfolderBase]: 3184/4877 cut-off events. [2024-06-20 16:12:23,147 INFO L125 PetriNetUnfolderBase]: For 229511/229519 co-relation queries the response was YES. [2024-06-20 16:12:23,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35645 conditions, 4877 events. 3184/4877 cut-off events. For 229511/229519 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 25632 event pairs, 1015 based on Foata normal form. 8/4878 useless extension candidates. Maximal degree in co-relation 35568. Up to 3910 conditions per place. [2024-06-20 16:12:23,193 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 212 selfloop transitions, 181 changer transitions 0/399 dead transitions. [2024-06-20 16:12:23,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 399 transitions, 5588 flow [2024-06-20 16:12:23,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:12:23,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:12:23,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-20 16:12:23,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48409090909090907 [2024-06-20 16:12:23,204 INFO L175 Difference]: Start difference. First operand has 184 places, 340 transitions, 3820 flow. Second operand 10 states and 213 transitions. [2024-06-20 16:12:23,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 399 transitions, 5588 flow [2024-06-20 16:12:23,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 399 transitions, 5392 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-20 16:12:23,421 INFO L231 Difference]: Finished difference. Result has 189 places, 356 transitions, 4347 flow [2024-06-20 16:12:23,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3624, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4347, PETRI_PLACES=189, PETRI_TRANSITIONS=356} [2024-06-20 16:12:23,421 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-20 16:12:23,422 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 356 transitions, 4347 flow [2024-06-20 16:12:23,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:12:23,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:23,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:23,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:12:23,422 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)] === [2024-06-20 16:12:23,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:23,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1233041440, now seen corresponding path program 2 times [2024-06-20 16:12:23,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:23,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929057440] [2024-06-20 16:12:23,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:23,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:24,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:24,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929057440] [2024-06-20 16:12:24,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929057440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:24,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:24,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:24,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2546340] [2024-06-20 16:12:24,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:24,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:24,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:24,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:24,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:24,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:12:24,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 356 transitions, 4347 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:24,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:24,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:12:24,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:25,507 INFO L124 PetriNetUnfolderBase]: 3164/4920 cut-off events. [2024-06-20 16:12:25,508 INFO L125 PetriNetUnfolderBase]: For 257010/257052 co-relation queries the response was YES. [2024-06-20 16:12:25,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37805 conditions, 4920 events. 3164/4920 cut-off events. For 257010/257052 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 26798 event pairs, 1037 based on Foata normal form. 14/4911 useless extension candidates. Maximal degree in co-relation 37726. Up to 4212 conditions per place. [2024-06-20 16:12:25,561 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 280 selfloop transitions, 94 changer transitions 0/412 dead transitions. [2024-06-20 16:12:25,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 412 transitions, 5615 flow [2024-06-20 16:12:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:12:25,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:12:25,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-20 16:12:25,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46487603305785125 [2024-06-20 16:12:25,563 INFO L175 Difference]: Start difference. First operand has 189 places, 356 transitions, 4347 flow. Second operand 11 states and 225 transitions. [2024-06-20 16:12:25,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 412 transitions, 5615 flow [2024-06-20 16:12:25,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 412 transitions, 5459 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-20 16:12:25,835 INFO L231 Difference]: Finished difference. Result has 198 places, 370 transitions, 4623 flow [2024-06-20 16:12:25,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4207, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4623, PETRI_PLACES=198, PETRI_TRANSITIONS=370} [2024-06-20 16:12:25,948 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 153 predicate places. [2024-06-20 16:12:25,949 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 370 transitions, 4623 flow [2024-06-20 16:12:25,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:25,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:25,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:25,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:12:25,949 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:25,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:25,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1495000750, now seen corresponding path program 3 times [2024-06-20 16:12:25,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:25,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254552302] [2024-06-20 16:12:25,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:25,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:26,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:26,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254552302] [2024-06-20 16:12:26,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254552302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:26,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:26,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:12:26,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088088287] [2024-06-20 16:12:26,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:26,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:12:26,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:26,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:12:26,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:12:26,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:12:26,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 370 transitions, 4623 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:12:26,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:26,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:12:26,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:28,294 INFO L124 PetriNetUnfolderBase]: 3315/5093 cut-off events. [2024-06-20 16:12:28,294 INFO L125 PetriNetUnfolderBase]: For 260205/260213 co-relation queries the response was YES. [2024-06-20 16:12:28,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38675 conditions, 5093 events. 3315/5093 cut-off events. For 260205/260213 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 27219 event pairs, 1045 based on Foata normal form. 8/5094 useless extension candidates. Maximal degree in co-relation 38593. Up to 4100 conditions per place. [2024-06-20 16:12:28,337 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 232 selfloop transitions, 178 changer transitions 0/416 dead transitions. [2024-06-20 16:12:28,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 416 transitions, 6201 flow [2024-06-20 16:12:28,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:12:28,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:12:28,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-20 16:12:28,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-20 16:12:28,346 INFO L175 Difference]: Start difference. First operand has 198 places, 370 transitions, 4623 flow. Second operand 10 states and 214 transitions. [2024-06-20 16:12:28,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 416 transitions, 6201 flow [2024-06-20 16:12:28,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 416 transitions, 6046 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 16:12:28,590 INFO L231 Difference]: Finished difference. Result has 201 places, 373 transitions, 4883 flow [2024-06-20 16:12:28,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4468, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4883, PETRI_PLACES=201, PETRI_TRANSITIONS=373} [2024-06-20 16:12:28,590 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 156 predicate places. [2024-06-20 16:12:28,591 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 373 transitions, 4883 flow [2024-06-20 16:12:28,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:12:28,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:28,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:28,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:12:28,591 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)] === [2024-06-20 16:12:28,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:28,592 INFO L85 PathProgramCache]: Analyzing trace with hash -555851980, now seen corresponding path program 1 times [2024-06-20 16:12:28,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:28,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956630362] [2024-06-20 16:12:28,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:28,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:29,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:29,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956630362] [2024-06-20 16:12:29,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956630362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:29,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:29,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:29,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102874067] [2024-06-20 16:12:29,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:29,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:29,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:29,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:29,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:29,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:12:29,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 373 transitions, 4883 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:29,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:29,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:12:29,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:30,709 INFO L124 PetriNetUnfolderBase]: 3352/5134 cut-off events. [2024-06-20 16:12:30,710 INFO L125 PetriNetUnfolderBase]: For 275783/275787 co-relation queries the response was YES. [2024-06-20 16:12:30,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39963 conditions, 5134 events. 3352/5134 cut-off events. For 275783/275787 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 27278 event pairs, 1081 based on Foata normal form. 6/5132 useless extension candidates. Maximal degree in co-relation 39879. Up to 4555 conditions per place. [2024-06-20 16:12:30,761 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 316 selfloop transitions, 99 changer transitions 0/421 dead transitions. [2024-06-20 16:12:30,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 421 transitions, 6303 flow [2024-06-20 16:12:30,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:12:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:12:30,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-20 16:12:30,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4462809917355372 [2024-06-20 16:12:30,765 INFO L175 Difference]: Start difference. First operand has 201 places, 373 transitions, 4883 flow. Second operand 11 states and 216 transitions. [2024-06-20 16:12:30,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 421 transitions, 6303 flow [2024-06-20 16:12:31,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 421 transitions, 6014 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-20 16:12:31,047 INFO L231 Difference]: Finished difference. Result has 207 places, 383 transitions, 5033 flow [2024-06-20 16:12:31,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4594, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5033, PETRI_PLACES=207, PETRI_TRANSITIONS=383} [2024-06-20 16:12:31,048 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 162 predicate places. [2024-06-20 16:12:31,048 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 383 transitions, 5033 flow [2024-06-20 16:12:31,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:31,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:31,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:31,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:12:31,049 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)] === [2024-06-20 16:12:31,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:31,049 INFO L85 PathProgramCache]: Analyzing trace with hash -555813974, now seen corresponding path program 3 times [2024-06-20 16:12:31,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:31,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727054643] [2024-06-20 16:12:31,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:31,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:31,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:31,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727054643] [2024-06-20 16:12:31,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727054643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:31,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:31,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:12:31,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428361521] [2024-06-20 16:12:31,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:31,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:12:31,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:31,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:12:31,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:12:31,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:12:31,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 383 transitions, 5033 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:31,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:31,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:12:31,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:33,157 INFO L124 PetriNetUnfolderBase]: 3207/4993 cut-off events. [2024-06-20 16:12:33,157 INFO L125 PetriNetUnfolderBase]: For 294540/294581 co-relation queries the response was YES. [2024-06-20 16:12:33,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39601 conditions, 4993 events. 3207/4993 cut-off events. For 294540/294581 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 27224 event pairs, 1039 based on Foata normal form. 13/4991 useless extension candidates. Maximal degree in co-relation 39515. Up to 4354 conditions per place. [2024-06-20 16:12:33,210 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 296 selfloop transitions, 84 changer transitions 0/421 dead transitions. [2024-06-20 16:12:33,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 421 transitions, 6015 flow [2024-06-20 16:12:33,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:12:33,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:12:33,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-20 16:12:33,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-20 16:12:33,211 INFO L175 Difference]: Start difference. First operand has 207 places, 383 transitions, 5033 flow. Second operand 11 states and 220 transitions. [2024-06-20 16:12:33,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 421 transitions, 6015 flow [2024-06-20 16:12:33,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 421 transitions, 5879 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-20 16:12:33,576 INFO L231 Difference]: Finished difference. Result has 212 places, 385 transitions, 5121 flow [2024-06-20 16:12:33,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4897, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5121, PETRI_PLACES=212, PETRI_TRANSITIONS=385} [2024-06-20 16:12:33,577 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 167 predicate places. [2024-06-20 16:12:33,577 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 385 transitions, 5121 flow [2024-06-20 16:12:33,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:33,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:33,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:33,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:12:33,579 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)] === [2024-06-20 16:12:33,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:33,580 INFO L85 PathProgramCache]: Analyzing trace with hash -283508688, now seen corresponding path program 4 times [2024-06-20 16:12:33,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:33,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396133849] [2024-06-20 16:12:33,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:33,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:34,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:34,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396133849] [2024-06-20 16:12:34,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396133849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:34,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:34,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:12:34,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374560594] [2024-06-20 16:12:34,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:34,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:12:34,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:34,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:12:34,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:12:34,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:12:34,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 385 transitions, 5121 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:12:34,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:34,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:12:34,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:35,749 INFO L124 PetriNetUnfolderBase]: 3403/5225 cut-off events. [2024-06-20 16:12:35,749 INFO L125 PetriNetUnfolderBase]: For 304957/304961 co-relation queries the response was YES. [2024-06-20 16:12:35,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41417 conditions, 5225 events. 3403/5225 cut-off events. For 304957/304961 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 27909 event pairs, 1080 based on Foata normal form. 8/5228 useless extension candidates. Maximal degree in co-relation 41329. Up to 4731 conditions per place. [2024-06-20 16:12:35,806 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 342 selfloop transitions, 98 changer transitions 0/446 dead transitions. [2024-06-20 16:12:35,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 446 transitions, 6695 flow [2024-06-20 16:12:35,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:12:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:12:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 231 transitions. [2024-06-20 16:12:35,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 16:12:35,821 INFO L175 Difference]: Start difference. First operand has 212 places, 385 transitions, 5121 flow. Second operand 12 states and 231 transitions. [2024-06-20 16:12:35,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 446 transitions, 6695 flow [2024-06-20 16:12:36,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 446 transitions, 6459 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-20 16:12:36,203 INFO L231 Difference]: Finished difference. Result has 217 places, 402 transitions, 5393 flow [2024-06-20 16:12:36,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4885, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5393, PETRI_PLACES=217, PETRI_TRANSITIONS=402} [2024-06-20 16:12:36,204 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 172 predicate places. [2024-06-20 16:12:36,204 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 402 transitions, 5393 flow [2024-06-20 16:12:36,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:12:36,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:36,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:36,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:12:36,205 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)] === [2024-06-20 16:12:36,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:36,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1613153840, now seen corresponding path program 4 times [2024-06-20 16:12:36,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:36,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330428138] [2024-06-20 16:12:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:36,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:37,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:37,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:37,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330428138] [2024-06-20 16:12:37,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330428138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:37,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:37,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:12:37,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650448047] [2024-06-20 16:12:37,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:37,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:12:37,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:37,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:12:37,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:12:37,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:12:37,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 402 transitions, 5393 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:37,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:37,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:12:37,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:38,863 INFO L124 PetriNetUnfolderBase]: 3402/5315 cut-off events. [2024-06-20 16:12:38,863 INFO L125 PetriNetUnfolderBase]: For 327737/327748 co-relation queries the response was YES. [2024-06-20 16:12:38,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42858 conditions, 5315 events. 3402/5315 cut-off events. For 327737/327748 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 29500 event pairs, 1020 based on Foata normal form. 17/5325 useless extension candidates. Maximal degree in co-relation 42767. Up to 4613 conditions per place. [2024-06-20 16:12:38,918 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 342 selfloop transitions, 83 changer transitions 0/466 dead transitions. [2024-06-20 16:12:38,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 466 transitions, 6888 flow [2024-06-20 16:12:38,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:12:38,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:12:38,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-20 16:12:38,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607438016528926 [2024-06-20 16:12:38,919 INFO L175 Difference]: Start difference. First operand has 217 places, 402 transitions, 5393 flow. Second operand 11 states and 223 transitions. [2024-06-20 16:12:38,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 466 transitions, 6888 flow [2024-06-20 16:12:39,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 466 transitions, 6674 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-20 16:12:39,293 INFO L231 Difference]: Finished difference. Result has 220 places, 424 transitions, 5727 flow [2024-06-20 16:12:39,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5179, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5727, PETRI_PLACES=220, PETRI_TRANSITIONS=424} [2024-06-20 16:12:39,293 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 175 predicate places. [2024-06-20 16:12:39,293 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 424 transitions, 5727 flow [2024-06-20 16:12:39,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:39,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:39,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:39,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:12:39,294 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)] === [2024-06-20 16:12:39,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:39,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1613093266, now seen corresponding path program 2 times [2024-06-20 16:12:39,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:39,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26621826] [2024-06-20 16:12:39,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:39,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:40,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:40,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26621826] [2024-06-20 16:12:40,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26621826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:40,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:40,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:12:40,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205697221] [2024-06-20 16:12:40,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:40,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:12:40,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:40,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:12:40,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:12:40,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:12:40,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 424 transitions, 5727 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:12:40,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:40,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:12:40,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:41,845 INFO L124 PetriNetUnfolderBase]: 3589/5522 cut-off events. [2024-06-20 16:12:41,845 INFO L125 PetriNetUnfolderBase]: For 341694/341698 co-relation queries the response was YES. [2024-06-20 16:12:41,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44924 conditions, 5522 events. 3589/5522 cut-off events. For 341694/341698 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 30025 event pairs, 1093 based on Foata normal form. 7/5524 useless extension candidates. Maximal degree in co-relation 44830. Up to 5066 conditions per place. [2024-06-20 16:12:41,911 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 382 selfloop transitions, 84 changer transitions 0/472 dead transitions. [2024-06-20 16:12:41,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 472 transitions, 6973 flow [2024-06-20 16:12:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:12:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:12:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 225 transitions. [2024-06-20 16:12:41,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-20 16:12:41,912 INFO L175 Difference]: Start difference. First operand has 220 places, 424 transitions, 5727 flow. Second operand 12 states and 225 transitions. [2024-06-20 16:12:41,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 472 transitions, 6973 flow [2024-06-20 16:12:42,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 472 transitions, 6842 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 16:12:42,275 INFO L231 Difference]: Finished difference. Result has 225 places, 433 transitions, 5934 flow [2024-06-20 16:12:42,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5596, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5934, PETRI_PLACES=225, PETRI_TRANSITIONS=433} [2024-06-20 16:12:42,276 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-06-20 16:12:42,276 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 433 transitions, 5934 flow [2024-06-20 16:12:42,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:12:42,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:42,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:42,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:12:42,277 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)] === [2024-06-20 16:12:42,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:42,277 INFO L85 PathProgramCache]: Analyzing trace with hash -719733232, now seen corresponding path program 5 times [2024-06-20 16:12:42,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:42,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752107045] [2024-06-20 16:12:42,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:42,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:43,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:43,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752107045] [2024-06-20 16:12:43,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752107045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:43,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:43,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:12:43,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198274610] [2024-06-20 16:12:43,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:43,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:12:43,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:43,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:12:43,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:12:43,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:12:43,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 433 transitions, 5934 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:43,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:43,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:12:43,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:45,184 INFO L124 PetriNetUnfolderBase]: 3405/5325 cut-off events. [2024-06-20 16:12:45,185 INFO L125 PetriNetUnfolderBase]: For 352766/352777 co-relation queries the response was YES. [2024-06-20 16:12:45,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43828 conditions, 5325 events. 3405/5325 cut-off events. For 352766/352777 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29676 event pairs, 1038 based on Foata normal form. 19/5337 useless extension candidates. Maximal degree in co-relation 43732. Up to 4719 conditions per place. [2024-06-20 16:12:45,246 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 355 selfloop transitions, 71 changer transitions 0/470 dead transitions. [2024-06-20 16:12:45,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 470 transitions, 6951 flow [2024-06-20 16:12:45,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:12:45,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:12:45,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-20 16:12:45,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45041322314049587 [2024-06-20 16:12:45,248 INFO L175 Difference]: Start difference. First operand has 225 places, 433 transitions, 5934 flow. Second operand 11 states and 218 transitions. [2024-06-20 16:12:45,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 470 transitions, 6951 flow [2024-06-20 16:12:45,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 470 transitions, 6637 flow, removed 81 selfloop flow, removed 10 redundant places. [2024-06-20 16:12:45,641 INFO L231 Difference]: Finished difference. Result has 226 places, 433 transitions, 5777 flow [2024-06-20 16:12:45,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5620, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5777, PETRI_PLACES=226, PETRI_TRANSITIONS=433} [2024-06-20 16:12:45,641 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-20 16:12:45,641 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 433 transitions, 5777 flow [2024-06-20 16:12:45,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:45,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:45,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:45,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:12:45,642 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)] === [2024-06-20 16:12:45,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:45,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1494827956, now seen corresponding path program 3 times [2024-06-20 16:12:45,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:45,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143630216] [2024-06-20 16:12:45,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:45,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:46,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:46,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143630216] [2024-06-20 16:12:46,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143630216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:46,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:46,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:12:46,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415150758] [2024-06-20 16:12:46,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:46,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:12:46,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:46,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:12:46,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:12:47,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:12:47,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 433 transitions, 5777 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:12:47,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:47,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:12:47,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:48,525 INFO L124 PetriNetUnfolderBase]: 3582/5519 cut-off events. [2024-06-20 16:12:48,525 INFO L125 PetriNetUnfolderBase]: For 362823/362831 co-relation queries the response was YES. [2024-06-20 16:12:48,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45165 conditions, 5519 events. 3582/5519 cut-off events. For 362823/362831 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 30065 event pairs, 1101 based on Foata normal form. 6/5520 useless extension candidates. Maximal degree in co-relation 45068. Up to 4826 conditions per place. [2024-06-20 16:12:48,593 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 288 selfloop transitions, 174 changer transitions 0/468 dead transitions. [2024-06-20 16:12:48,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 468 transitions, 6979 flow [2024-06-20 16:12:48,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:12:48,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:12:48,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-20 16:12:48,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-20 16:12:48,595 INFO L175 Difference]: Start difference. First operand has 226 places, 433 transitions, 5777 flow. Second operand 10 states and 197 transitions. [2024-06-20 16:12:48,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 468 transitions, 6979 flow [2024-06-20 16:12:48,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 468 transitions, 6842 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 16:12:48,999 INFO L231 Difference]: Finished difference. Result has 227 places, 436 transitions, 6065 flow [2024-06-20 16:12:48,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5640, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6065, PETRI_PLACES=227, PETRI_TRANSITIONS=436} [2024-06-20 16:12:49,000 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-20 16:12:49,000 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 436 transitions, 6065 flow [2024-06-20 16:12:49,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:12:49,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:49,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:49,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:12:49,000 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)] === [2024-06-20 16:12:49,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:49,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1008136062, now seen corresponding path program 5 times [2024-06-20 16:12:49,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:49,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757494111] [2024-06-20 16:12:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:49,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:49,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:49,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757494111] [2024-06-20 16:12:49,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757494111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:49,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:49,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:12:49,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989433590] [2024-06-20 16:12:49,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:49,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:12:49,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:49,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:12:49,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:12:50,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:12:50,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 436 transitions, 6065 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:12:50,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:50,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:12:50,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:51,388 INFO L124 PetriNetUnfolderBase]: 3572/5506 cut-off events. [2024-06-20 16:12:51,388 INFO L125 PetriNetUnfolderBase]: For 379082/379090 co-relation queries the response was YES. [2024-06-20 16:12:51,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45956 conditions, 5506 events. 3572/5506 cut-off events. For 379082/379090 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 30044 event pairs, 1070 based on Foata normal form. 8/5509 useless extension candidates. Maximal degree in co-relation 45858. Up to 4470 conditions per place. [2024-06-20 16:12:51,455 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 261 selfloop transitions, 207 changer transitions 0/474 dead transitions. [2024-06-20 16:12:51,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 474 transitions, 7501 flow [2024-06-20 16:12:51,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:12:51,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:12:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-20 16:12:51,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-20 16:12:51,457 INFO L175 Difference]: Start difference. First operand has 227 places, 436 transitions, 6065 flow. Second operand 10 states and 207 transitions. [2024-06-20 16:12:51,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 474 transitions, 7501 flow [2024-06-20 16:12:51,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 474 transitions, 7074 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-20 16:12:51,953 INFO L231 Difference]: Finished difference. Result has 229 places, 436 transitions, 6060 flow [2024-06-20 16:12:51,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5638, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6060, PETRI_PLACES=229, PETRI_TRANSITIONS=436} [2024-06-20 16:12:51,954 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-20 16:12:51,954 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 436 transitions, 6060 flow [2024-06-20 16:12:51,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:12:51,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:51,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:51,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:12:51,954 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)] === [2024-06-20 16:12:51,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:51,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1495005586, now seen corresponding path program 4 times [2024-06-20 16:12:51,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:51,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586481828] [2024-06-20 16:12:51,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:51,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:53,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:53,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586481828] [2024-06-20 16:12:53,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586481828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:53,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:53,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:12:53,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391748304] [2024-06-20 16:12:53,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:53,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:12:53,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:53,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:12:53,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:12:53,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:12:53,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 436 transitions, 6060 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:12:53,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:53,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:12:53,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:54,707 INFO L124 PetriNetUnfolderBase]: 3583/5521 cut-off events. [2024-06-20 16:12:54,708 INFO L125 PetriNetUnfolderBase]: For 393426/393434 co-relation queries the response was YES. [2024-06-20 16:12:54,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46518 conditions, 5521 events. 3583/5521 cut-off events. For 393426/393434 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 30096 event pairs, 1099 based on Foata normal form. 6/5522 useless extension candidates. Maximal degree in co-relation 46419. Up to 4799 conditions per place. [2024-06-20 16:12:54,773 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 295 selfloop transitions, 174 changer transitions 0/475 dead transitions. [2024-06-20 16:12:54,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 475 transitions, 7314 flow [2024-06-20 16:12:54,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:12:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:12:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-20 16:12:54,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4462809917355372 [2024-06-20 16:12:54,775 INFO L175 Difference]: Start difference. First operand has 229 places, 436 transitions, 6060 flow. Second operand 11 states and 216 transitions. [2024-06-20 16:12:54,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 475 transitions, 7314 flow [2024-06-20 16:12:55,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 475 transitions, 6888 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 16:12:55,188 INFO L231 Difference]: Finished difference. Result has 231 places, 439 transitions, 6066 flow [2024-06-20 16:12:55,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6066, PETRI_PLACES=231, PETRI_TRANSITIONS=439} [2024-06-20 16:12:55,189 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 186 predicate places. [2024-06-20 16:12:55,189 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 439 transitions, 6066 flow [2024-06-20 16:12:55,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:12:55,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:55,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:55,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:12:55,190 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:55,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:55,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1495005710, now seen corresponding path program 6 times [2024-06-20 16:12:55,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:55,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856749010] [2024-06-20 16:12:55,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:55,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:56,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:56,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856749010] [2024-06-20 16:12:56,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856749010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:56,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:56,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:12:56,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352267875] [2024-06-20 16:12:56,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:56,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:12:56,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:56,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:12:56,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:12:56,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:12:56,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 439 transitions, 6066 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:56,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:56,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:12:56,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:57,858 INFO L124 PetriNetUnfolderBase]: 3443/5383 cut-off events. [2024-06-20 16:12:57,859 INFO L125 PetriNetUnfolderBase]: For 411899/411907 co-relation queries the response was YES. [2024-06-20 16:12:57,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46095 conditions, 5383 events. 3443/5383 cut-off events. For 411899/411907 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 29949 event pairs, 1050 based on Foata normal form. 10/5388 useless extension candidates. Maximal degree in co-relation 45995. Up to 4699 conditions per place. [2024-06-20 16:12:57,911 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 329 selfloop transitions, 99 changer transitions 0/474 dead transitions. [2024-06-20 16:12:57,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 474 transitions, 7200 flow [2024-06-20 16:12:57,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:12:57,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:12:57,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-20 16:12:57,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-20 16:12:57,913 INFO L175 Difference]: Start difference. First operand has 231 places, 439 transitions, 6066 flow. Second operand 10 states and 202 transitions. [2024-06-20 16:12:57,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 474 transitions, 7200 flow [2024-06-20 16:12:58,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 474 transitions, 6796 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-20 16:12:58,342 INFO L231 Difference]: Finished difference. Result has 232 places, 441 transitions, 5931 flow [2024-06-20 16:12:58,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5662, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5931, PETRI_PLACES=232, PETRI_TRANSITIONS=441} [2024-06-20 16:12:58,343 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-20 16:12:58,343 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 441 transitions, 5931 flow [2024-06-20 16:12:58,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:58,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:58,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:58,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 16:12:58,343 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:58,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:58,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1727466736, now seen corresponding path program 1 times [2024-06-20 16:12:58,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:58,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18000045] [2024-06-20 16:12:58,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:58,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:58,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:58,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18000045] [2024-06-20 16:12:58,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18000045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:58,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:58,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:12:58,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967399488] [2024-06-20 16:12:58,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:58,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:12:58,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:58,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:12:58,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:12:59,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:12:59,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 441 transitions, 5931 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:59,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:59,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:12:59,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:00,344 INFO L124 PetriNetUnfolderBase]: 3739/5843 cut-off events. [2024-06-20 16:13:00,344 INFO L125 PetriNetUnfolderBase]: For 487592/487602 co-relation queries the response was YES. [2024-06-20 16:13:00,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50681 conditions, 5843 events. 3739/5843 cut-off events. For 487592/487602 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 32481 event pairs, 1290 based on Foata normal form. 12/5843 useless extension candidates. Maximal degree in co-relation 50580. Up to 5233 conditions per place. [2024-06-20 16:13:00,404 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 349 selfloop transitions, 41 changer transitions 0/465 dead transitions. [2024-06-20 16:13:00,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 465 transitions, 6955 flow [2024-06-20 16:13:00,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:13:00,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:13:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-20 16:13:00,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-20 16:13:00,406 INFO L175 Difference]: Start difference. First operand has 232 places, 441 transitions, 5931 flow. Second operand 7 states and 141 transitions. [2024-06-20 16:13:00,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 465 transitions, 6955 flow [2024-06-20 16:13:00,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 465 transitions, 6704 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-20 16:13:00,933 INFO L231 Difference]: Finished difference. Result has 231 places, 447 transitions, 5840 flow [2024-06-20 16:13:00,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5680, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5840, PETRI_PLACES=231, PETRI_TRANSITIONS=447} [2024-06-20 16:13:00,934 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 186 predicate places. [2024-06-20 16:13:00,934 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 447 transitions, 5840 flow [2024-06-20 16:13:00,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:00,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:00,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:00,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 16:13:00,935 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)] === [2024-06-20 16:13:00,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:00,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1156149034, now seen corresponding path program 7 times [2024-06-20 16:13:00,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:00,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604675572] [2024-06-20 16:13:00,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:00,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:02,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:02,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604675572] [2024-06-20 16:13:02,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604675572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:02,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:02,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:02,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021714434] [2024-06-20 16:13:02,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:02,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:02,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:02,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:02,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:02,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:13:02,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 447 transitions, 5840 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:02,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:02,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:13:02,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:03,555 INFO L124 PetriNetUnfolderBase]: 3574/5515 cut-off events. [2024-06-20 16:13:03,555 INFO L125 PetriNetUnfolderBase]: For 476867/477038 co-relation queries the response was YES. [2024-06-20 16:13:03,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48668 conditions, 5515 events. 3574/5515 cut-off events. For 476867/477038 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 30481 event pairs, 868 based on Foata normal form. 28/5492 useless extension candidates. Maximal degree in co-relation 48566. Up to 4501 conditions per place. [2024-06-20 16:13:03,618 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 311 selfloop transitions, 135 changer transitions 0/492 dead transitions. [2024-06-20 16:13:03,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 492 transitions, 7264 flow [2024-06-20 16:13:03,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:13:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:13:03,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-20 16:13:03,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-20 16:13:03,619 INFO L175 Difference]: Start difference. First operand has 231 places, 447 transitions, 5840 flow. Second operand 10 states and 205 transitions. [2024-06-20 16:13:03,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 492 transitions, 7264 flow [2024-06-20 16:13:04,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 492 transitions, 7208 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 16:13:04,119 INFO L231 Difference]: Finished difference. Result has 238 places, 451 transitions, 6173 flow [2024-06-20 16:13:04,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5784, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6173, PETRI_PLACES=238, PETRI_TRANSITIONS=451} [2024-06-20 16:13:04,120 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 193 predicate places. [2024-06-20 16:13:04,120 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 451 transitions, 6173 flow [2024-06-20 16:13:04,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:04,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:04,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:04,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 16:13:04,120 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)] === [2024-06-20 16:13:04,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:04,121 INFO L85 PathProgramCache]: Analyzing trace with hash -198833273, now seen corresponding path program 1 times [2024-06-20 16:13:04,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:04,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108629422] [2024-06-20 16:13:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:04,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:05,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:05,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108629422] [2024-06-20 16:13:05,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108629422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:05,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:05,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:13:05,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322940739] [2024-06-20 16:13:05,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:05,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:13:05,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:05,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:13:05,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:13:05,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:13:05,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 451 transitions, 6173 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:05,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:05,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:13:05,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:06,733 INFO L124 PetriNetUnfolderBase]: 3690/5658 cut-off events. [2024-06-20 16:13:06,733 INFO L125 PetriNetUnfolderBase]: For 466307/466311 co-relation queries the response was YES. [2024-06-20 16:13:06,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49856 conditions, 5658 events. 3690/5658 cut-off events. For 466307/466311 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 30793 event pairs, 1126 based on Foata normal form. 8/5661 useless extension candidates. Maximal degree in co-relation 49752. Up to 5126 conditions per place. [2024-06-20 16:13:06,804 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 396 selfloop transitions, 101 changer transitions 0/503 dead transitions. [2024-06-20 16:13:06,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 503 transitions, 7819 flow [2024-06-20 16:13:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:13:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:13:06,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 249 transitions. [2024-06-20 16:13:06,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353146853146853 [2024-06-20 16:13:06,813 INFO L175 Difference]: Start difference. First operand has 238 places, 451 transitions, 6173 flow. Second operand 13 states and 249 transitions. [2024-06-20 16:13:06,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 503 transitions, 7819 flow [2024-06-20 16:13:07,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 503 transitions, 7566 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-20 16:13:07,399 INFO L231 Difference]: Finished difference. Result has 245 places, 454 transitions, 6227 flow [2024-06-20 16:13:07,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5938, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6227, PETRI_PLACES=245, PETRI_TRANSITIONS=454} [2024-06-20 16:13:07,399 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 200 predicate places. [2024-06-20 16:13:07,400 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 454 transitions, 6227 flow [2024-06-20 16:13:07,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:07,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:07,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:07,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 16:13:07,400 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)] === [2024-06-20 16:13:07,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:07,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1340226932, now seen corresponding path program 8 times [2024-06-20 16:13:07,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:07,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974466933] [2024-06-20 16:13:07,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:07,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:08,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:08,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974466933] [2024-06-20 16:13:08,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974466933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:08,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:08,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:08,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971443133] [2024-06-20 16:13:08,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:08,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:08,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:08,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:08,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:08,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:13:08,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 454 transitions, 6227 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:08,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:08,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:13:08,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:10,007 INFO L124 PetriNetUnfolderBase]: 3715/5782 cut-off events. [2024-06-20 16:13:10,007 INFO L125 PetriNetUnfolderBase]: For 445132/445184 co-relation queries the response was YES. [2024-06-20 16:13:10,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50148 conditions, 5782 events. 3715/5782 cut-off events. For 445132/445184 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 32574 event pairs, 1099 based on Foata normal form. 24/5788 useless extension candidates. Maximal degree in co-relation 50044. Up to 4990 conditions per place. [2024-06-20 16:13:10,078 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 359 selfloop transitions, 123 changer transitions 0/528 dead transitions. [2024-06-20 16:13:10,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 528 transitions, 8001 flow [2024-06-20 16:13:10,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:13:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:13:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-20 16:13:10,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-20 16:13:10,080 INFO L175 Difference]: Start difference. First operand has 245 places, 454 transitions, 6227 flow. Second operand 10 states and 202 transitions. [2024-06-20 16:13:10,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 528 transitions, 8001 flow [2024-06-20 16:13:10,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 528 transitions, 7738 flow, removed 33 selfloop flow, removed 11 redundant places. [2024-06-20 16:13:10,645 INFO L231 Difference]: Finished difference. Result has 244 places, 490 transitions, 6840 flow [2024-06-20 16:13:10,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5964, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6840, PETRI_PLACES=244, PETRI_TRANSITIONS=490} [2024-06-20 16:13:10,645 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 199 predicate places. [2024-06-20 16:13:10,645 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 490 transitions, 6840 flow [2024-06-20 16:13:10,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:10,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:10,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:10,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 16:13:10,646 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)] === [2024-06-20 16:13:10,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:10,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1533717955, now seen corresponding path program 2 times [2024-06-20 16:13:10,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:10,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249885898] [2024-06-20 16:13:10,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:10,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:11,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:11,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249885898] [2024-06-20 16:13:11,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249885898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:11,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:11,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:13:11,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138003704] [2024-06-20 16:13:11,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:11,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:13:11,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:11,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:13:11,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:13:12,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:13:12,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 490 transitions, 6840 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:12,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:12,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:13:12,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:13,808 INFO L124 PetriNetUnfolderBase]: 3896/5990 cut-off events. [2024-06-20 16:13:13,808 INFO L125 PetriNetUnfolderBase]: For 455190/455194 co-relation queries the response was YES. [2024-06-20 16:13:13,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52048 conditions, 5990 events. 3896/5990 cut-off events. For 455190/455194 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 33116 event pairs, 1111 based on Foata normal form. 8/5994 useless extension candidates. Maximal degree in co-relation 51943. Up to 5404 conditions per place. [2024-06-20 16:13:13,870 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 429 selfloop transitions, 110 changer transitions 0/545 dead transitions. [2024-06-20 16:13:13,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 545 transitions, 8270 flow [2024-06-20 16:13:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 16:13:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 16:13:13,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 261 transitions. [2024-06-20 16:13:13,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4237012987012987 [2024-06-20 16:13:13,872 INFO L175 Difference]: Start difference. First operand has 244 places, 490 transitions, 6840 flow. Second operand 14 states and 261 transitions. [2024-06-20 16:13:13,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 545 transitions, 8270 flow [2024-06-20 16:13:14,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 545 transitions, 7978 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-20 16:13:14,422 INFO L231 Difference]: Finished difference. Result has 251 places, 496 transitions, 6887 flow [2024-06-20 16:13:14,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6548, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6887, PETRI_PLACES=251, PETRI_TRANSITIONS=496} [2024-06-20 16:13:14,423 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 206 predicate places. [2024-06-20 16:13:14,423 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 496 transitions, 6887 flow [2024-06-20 16:13:14,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:14,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:14,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:14,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 16:13:14,424 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)] === [2024-06-20 16:13:14,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:14,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1340226808, now seen corresponding path program 5 times [2024-06-20 16:13:14,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:14,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701532167] [2024-06-20 16:13:14,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:14,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:15,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:15,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701532167] [2024-06-20 16:13:15,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701532167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:15,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:15,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:15,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870465762] [2024-06-20 16:13:15,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:15,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:15,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:15,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:15,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:15,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:13:15,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 496 transitions, 6887 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:13:15,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:15,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:13:15,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:16,988 INFO L124 PetriNetUnfolderBase]: 3955/6074 cut-off events. [2024-06-20 16:13:16,988 INFO L125 PetriNetUnfolderBase]: For 473759/473763 co-relation queries the response was YES. [2024-06-20 16:13:17,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53161 conditions, 6074 events. 3955/6074 cut-off events. For 473759/473763 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 33656 event pairs, 1156 based on Foata normal form. 7/6072 useless extension candidates. Maximal degree in co-relation 53055. Up to 5382 conditions per place. [2024-06-20 16:13:17,066 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 397 selfloop transitions, 151 changer transitions 0/554 dead transitions. [2024-06-20 16:13:17,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 554 transitions, 8681 flow [2024-06-20 16:13:17,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:13:17,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:13:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-20 16:13:17,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-20 16:13:17,068 INFO L175 Difference]: Start difference. First operand has 251 places, 496 transitions, 6887 flow. Second operand 10 states and 197 transitions. [2024-06-20 16:13:17,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 554 transitions, 8681 flow [2024-06-20 16:13:17,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 554 transitions, 8403 flow, removed 33 selfloop flow, removed 11 redundant places. [2024-06-20 16:13:17,685 INFO L231 Difference]: Finished difference. Result has 250 places, 514 transitions, 7170 flow [2024-06-20 16:13:17,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6624, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7170, PETRI_PLACES=250, PETRI_TRANSITIONS=514} [2024-06-20 16:13:17,685 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-20 16:13:17,685 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 514 transitions, 7170 flow [2024-06-20 16:13:17,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:13:17,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:17,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:17,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 16:13:17,686 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)] === [2024-06-20 16:13:17,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:17,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1789658108, now seen corresponding path program 9 times [2024-06-20 16:13:17,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:17,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140796497] [2024-06-20 16:13:17,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:17,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:18,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:18,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140796497] [2024-06-20 16:13:18,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140796497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:18,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:18,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:18,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599357834] [2024-06-20 16:13:18,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:18,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:18,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:18,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:18,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:18,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:13:18,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 514 transitions, 7170 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:18,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:18,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:13:18,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:20,164 INFO L124 PetriNetUnfolderBase]: 3767/5867 cut-off events. [2024-06-20 16:13:20,164 INFO L125 PetriNetUnfolderBase]: For 483912/483947 co-relation queries the response was YES. [2024-06-20 16:13:20,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51614 conditions, 5867 events. 3767/5867 cut-off events. For 483912/483947 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 33175 event pairs, 1135 based on Foata normal form. 24/5878 useless extension candidates. Maximal degree in co-relation 51507. Up to 5131 conditions per place. [2024-06-20 16:13:20,233 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 401 selfloop transitions, 93 changer transitions 0/546 dead transitions. [2024-06-20 16:13:20,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 546 transitions, 8364 flow [2024-06-20 16:13:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:13:20,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:13:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-20 16:13:20,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-20 16:13:20,234 INFO L175 Difference]: Start difference. First operand has 250 places, 514 transitions, 7170 flow. Second operand 9 states and 180 transitions. [2024-06-20 16:13:20,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 546 transitions, 8364 flow [2024-06-20 16:13:20,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 546 transitions, 7967 flow, removed 92 selfloop flow, removed 7 redundant places. [2024-06-20 16:13:20,995 INFO L231 Difference]: Finished difference. Result has 252 places, 514 transitions, 6987 flow [2024-06-20 16:13:20,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6773, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6987, PETRI_PLACES=252, PETRI_TRANSITIONS=514} [2024-06-20 16:13:20,995 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 207 predicate places. [2024-06-20 16:13:20,996 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 514 transitions, 6987 flow [2024-06-20 16:13:20,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:20,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:20,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:20,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 16:13:20,996 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)] === [2024-06-20 16:13:20,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:20,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1900480752, now seen corresponding path program 6 times [2024-06-20 16:13:20,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:20,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944493963] [2024-06-20 16:13:20,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:20,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:22,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:22,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944493963] [2024-06-20 16:13:22,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944493963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:22,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:22,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:22,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493120357] [2024-06-20 16:13:22,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:22,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:22,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:22,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:22,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:22,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:13:22,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 514 transitions, 6987 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:13:22,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:22,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:13:22,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:23,536 INFO L124 PetriNetUnfolderBase]: 3924/6029 cut-off events. [2024-06-20 16:13:23,537 INFO L125 PetriNetUnfolderBase]: For 490640/490644 co-relation queries the response was YES. [2024-06-20 16:13:23,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52775 conditions, 6029 events. 3924/6029 cut-off events. For 490640/490644 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 33376 event pairs, 1186 based on Foata normal form. 7/6030 useless extension candidates. Maximal degree in co-relation 52667. Up to 5467 conditions per place. [2024-06-20 16:13:23,612 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 427 selfloop transitions, 117 changer transitions 0/550 dead transitions. [2024-06-20 16:13:23,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 550 transitions, 8346 flow [2024-06-20 16:13:23,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:13:23,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:13:23,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 16:13:23,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954545454545456 [2024-06-20 16:13:23,613 INFO L175 Difference]: Start difference. First operand has 252 places, 514 transitions, 6987 flow. Second operand 10 states and 189 transitions. [2024-06-20 16:13:23,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 550 transitions, 8346 flow [2024-06-20 16:13:24,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 550 transitions, 8001 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-20 16:13:24,276 INFO L231 Difference]: Finished difference. Result has 254 places, 514 transitions, 6912 flow [2024-06-20 16:13:24,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6642, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6912, PETRI_PLACES=254, PETRI_TRANSITIONS=514} [2024-06-20 16:13:24,284 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 209 predicate places. [2024-06-20 16:13:24,285 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 514 transitions, 6912 flow [2024-06-20 16:13:24,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:13:24,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:24,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:24,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 16:13:24,285 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)] === [2024-06-20 16:13:24,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:24,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1337425462, now seen corresponding path program 6 times [2024-06-20 16:13:24,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:24,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477798211] [2024-06-20 16:13:24,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:24,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:25,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:25,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477798211] [2024-06-20 16:13:25,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477798211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:25,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:25,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:25,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343771674] [2024-06-20 16:13:25,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:25,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:25,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:25,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:25,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:25,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:13:25,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 514 transitions, 6912 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:13:25,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:25,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:13:25,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:26,819 INFO L124 PetriNetUnfolderBase]: 3925/6035 cut-off events. [2024-06-20 16:13:26,819 INFO L125 PetriNetUnfolderBase]: For 507262/507266 co-relation queries the response was YES. [2024-06-20 16:13:26,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52784 conditions, 6035 events. 3925/6035 cut-off events. For 507262/507266 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 33405 event pairs, 1158 based on Foata normal form. 10/6040 useless extension candidates. Maximal degree in co-relation 52675. Up to 5497 conditions per place. [2024-06-20 16:13:27,040 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 439 selfloop transitions, 103 changer transitions 0/548 dead transitions. [2024-06-20 16:13:27,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 548 transitions, 8292 flow [2024-06-20 16:13:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:13:27,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:13:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 16:13:27,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-20 16:13:27,042 INFO L175 Difference]: Start difference. First operand has 254 places, 514 transitions, 6912 flow. Second operand 9 states and 173 transitions. [2024-06-20 16:13:27,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 548 transitions, 8292 flow [2024-06-20 16:13:27,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 548 transitions, 7971 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-20 16:13:27,579 INFO L231 Difference]: Finished difference. Result has 254 places, 517 transitions, 6915 flow [2024-06-20 16:13:27,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6591, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6915, PETRI_PLACES=254, PETRI_TRANSITIONS=517} [2024-06-20 16:13:27,580 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 209 predicate places. [2024-06-20 16:13:27,580 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 517 transitions, 6915 flow [2024-06-20 16:13:27,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:13:27,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:27,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:27,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 16:13:27,580 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:27,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:27,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1905133728, now seen corresponding path program 7 times [2024-06-20 16:13:27,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:27,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473702921] [2024-06-20 16:13:27,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:27,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:28,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:28,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473702921] [2024-06-20 16:13:28,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473702921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:28,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:28,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:28,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115166862] [2024-06-20 16:13:28,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:28,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:28,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:28,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:28,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:28,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:13:28,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 517 transitions, 6915 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:13:28,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:28,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:13:28,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:29,951 INFO L124 PetriNetUnfolderBase]: 4028/6200 cut-off events. [2024-06-20 16:13:29,951 INFO L125 PetriNetUnfolderBase]: For 540047/540055 co-relation queries the response was YES. [2024-06-20 16:13:29,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55281 conditions, 6200 events. 4028/6200 cut-off events. For 540047/540055 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 34604 event pairs, 1095 based on Foata normal form. 10/6205 useless extension candidates. Maximal degree in co-relation 55171. Up to 5014 conditions per place. [2024-06-20 16:13:30,017 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 335 selfloop transitions, 240 changer transitions 0/581 dead transitions. [2024-06-20 16:13:30,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 581 transitions, 9376 flow [2024-06-20 16:13:30,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:13:30,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:13:30,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-20 16:13:30,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-20 16:13:30,022 INFO L175 Difference]: Start difference. First operand has 254 places, 517 transitions, 6915 flow. Second operand 9 states and 186 transitions. [2024-06-20 16:13:30,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 581 transitions, 9376 flow [2024-06-20 16:13:30,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 581 transitions, 9095 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-20 16:13:30,620 INFO L231 Difference]: Finished difference. Result has 255 places, 536 transitions, 7647 flow [2024-06-20 16:13:30,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6642, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7647, PETRI_PLACES=255, PETRI_TRANSITIONS=536} [2024-06-20 16:13:30,620 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 210 predicate places. [2024-06-20 16:13:30,620 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 536 transitions, 7647 flow [2024-06-20 16:13:30,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:13:30,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:30,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:30,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 16:13:30,621 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:30,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:30,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1221961312, now seen corresponding path program 8 times [2024-06-20 16:13:30,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:30,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525712405] [2024-06-20 16:13:30,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:30,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:31,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:31,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525712405] [2024-06-20 16:13:31,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525712405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:31,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:31,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:31,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159733014] [2024-06-20 16:13:31,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:31,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:31,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:31,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:31,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:31,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:13:31,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 536 transitions, 7647 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:13:31,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:31,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:13:31,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:33,099 INFO L124 PetriNetUnfolderBase]: 4064/6255 cut-off events. [2024-06-20 16:13:33,100 INFO L125 PetriNetUnfolderBase]: For 547459/547467 co-relation queries the response was YES. [2024-06-20 16:13:33,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56602 conditions, 6255 events. 4064/6255 cut-off events. For 547459/547467 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 34963 event pairs, 1097 based on Foata normal form. 10/6260 useless extension candidates. Maximal degree in co-relation 56492. Up to 5046 conditions per place. [2024-06-20 16:13:33,175 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 351 selfloop transitions, 236 changer transitions 0/593 dead transitions. [2024-06-20 16:13:33,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 593 transitions, 9921 flow [2024-06-20 16:13:33,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:13:33,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:13:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-20 16:13:33,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-20 16:13:33,177 INFO L175 Difference]: Start difference. First operand has 255 places, 536 transitions, 7647 flow. Second operand 9 states and 188 transitions. [2024-06-20 16:13:33,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 593 transitions, 9921 flow [2024-06-20 16:13:33,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 593 transitions, 9489 flow, removed 145 selfloop flow, removed 5 redundant places. [2024-06-20 16:13:33,886 INFO L231 Difference]: Finished difference. Result has 259 places, 544 transitions, 7938 flow [2024-06-20 16:13:33,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7275, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7938, PETRI_PLACES=259, PETRI_TRANSITIONS=544} [2024-06-20 16:13:33,887 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 214 predicate places. [2024-06-20 16:13:33,887 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 544 transitions, 7938 flow [2024-06-20 16:13:33,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:13:33,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:33,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:33,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:13:33,888 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:33,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:33,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1222139128, now seen corresponding path program 7 times [2024-06-20 16:13:33,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:33,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608576338] [2024-06-20 16:13:33,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:33,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:35,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:35,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608576338] [2024-06-20 16:13:35,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608576338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:35,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:35,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:35,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646705767] [2024-06-20 16:13:35,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:35,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:35,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:35,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:35,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:35,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:13:35,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 544 transitions, 7938 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:13:35,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:35,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:13:35,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:36,794 INFO L124 PetriNetUnfolderBase]: 4091/6295 cut-off events. [2024-06-20 16:13:36,794 INFO L125 PetriNetUnfolderBase]: For 544366/544374 co-relation queries the response was YES. [2024-06-20 16:13:36,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57405 conditions, 6295 events. 4091/6295 cut-off events. For 544366/544374 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 35175 event pairs, 1138 based on Foata normal form. 6/6296 useless extension candidates. Maximal degree in co-relation 57294. Up to 5497 conditions per place. [2024-06-20 16:13:36,874 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 402 selfloop transitions, 181 changer transitions 0/589 dead transitions. [2024-06-20 16:13:36,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 589 transitions, 9826 flow [2024-06-20 16:13:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:13:36,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:13:36,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-20 16:13:36,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-20 16:13:36,875 INFO L175 Difference]: Start difference. First operand has 259 places, 544 transitions, 7938 flow. Second operand 10 states and 197 transitions. [2024-06-20 16:13:36,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 589 transitions, 9826 flow [2024-06-20 16:13:37,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 589 transitions, 9407 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-20 16:13:37,573 INFO L231 Difference]: Finished difference. Result has 263 places, 550 transitions, 8083 flow [2024-06-20 16:13:37,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7523, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8083, PETRI_PLACES=263, PETRI_TRANSITIONS=550} [2024-06-20 16:13:37,574 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 218 predicate places. [2024-06-20 16:13:37,574 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 550 transitions, 8083 flow [2024-06-20 16:13:37,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:13:37,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:37,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:37,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:13:37,575 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:37,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:37,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1222139252, now seen corresponding path program 10 times [2024-06-20 16:13:37,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:37,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958032657] [2024-06-20 16:13:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:37,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:38,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:38,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958032657] [2024-06-20 16:13:38,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958032657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:38,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:38,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:38,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345382786] [2024-06-20 16:13:38,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:38,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:38,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:38,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:38,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:38,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:13:38,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 550 transitions, 8083 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:38,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:38,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:13:38,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:40,353 INFO L124 PetriNetUnfolderBase]: 3936/6141 cut-off events. [2024-06-20 16:13:40,353 INFO L125 PetriNetUnfolderBase]: For 550397/550405 co-relation queries the response was YES. [2024-06-20 16:13:40,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56317 conditions, 6141 events. 3936/6141 cut-off events. For 550397/550405 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 35002 event pairs, 1089 based on Foata normal form. 10/6146 useless extension candidates. Maximal degree in co-relation 56206. Up to 5366 conditions per place. [2024-06-20 16:13:40,420 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 428 selfloop transitions, 101 changer transitions 0/583 dead transitions. [2024-06-20 16:13:40,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 583 transitions, 9462 flow [2024-06-20 16:13:40,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:13:40,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:13:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-20 16:13:40,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-20 16:13:40,421 INFO L175 Difference]: Start difference. First operand has 263 places, 550 transitions, 8083 flow. Second operand 9 states and 181 transitions. [2024-06-20 16:13:40,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 583 transitions, 9462 flow [2024-06-20 16:13:41,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 583 transitions, 9167 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-20 16:13:41,007 INFO L231 Difference]: Finished difference. Result has 266 places, 552 transitions, 8078 flow [2024-06-20 16:13:41,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7788, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8078, PETRI_PLACES=266, PETRI_TRANSITIONS=552} [2024-06-20 16:13:41,008 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 221 predicate places. [2024-06-20 16:13:41,008 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 552 transitions, 8078 flow [2024-06-20 16:13:41,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:41,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:41,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:41,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:13:41,009 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)] === [2024-06-20 16:13:41,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:41,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1904954238, now seen corresponding path program 9 times [2024-06-20 16:13:41,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:41,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145339027] [2024-06-20 16:13:41,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:41,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:41,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:41,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145339027] [2024-06-20 16:13:41,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145339027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:41,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:41,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:41,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924815417] [2024-06-20 16:13:41,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:41,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:41,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:41,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:41,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:42,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:13:42,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 552 transitions, 8078 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:13:42,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:42,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:13:42,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:43,546 INFO L124 PetriNetUnfolderBase]: 4092/6292 cut-off events. [2024-06-20 16:13:43,546 INFO L125 PetriNetUnfolderBase]: For 565089/565097 co-relation queries the response was YES. [2024-06-20 16:13:43,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57859 conditions, 6292 events. 4092/6292 cut-off events. For 565089/565097 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35184 event pairs, 1092 based on Foata normal form. 10/6297 useless extension candidates. Maximal degree in co-relation 57746. Up to 5099 conditions per place. [2024-06-20 16:13:43,617 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 363 selfloop transitions, 228 changer transitions 0/597 dead transitions. [2024-06-20 16:13:43,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 597 transitions, 9900 flow [2024-06-20 16:13:43,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:13:43,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:13:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-20 16:13:43,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-20 16:13:43,619 INFO L175 Difference]: Start difference. First operand has 266 places, 552 transitions, 8078 flow. Second operand 9 states and 187 transitions. [2024-06-20 16:13:43,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 597 transitions, 9900 flow [2024-06-20 16:13:44,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 597 transitions, 9560 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-20 16:13:44,374 INFO L231 Difference]: Finished difference. Result has 268 places, 552 transitions, 8213 flow [2024-06-20 16:13:44,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7738, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8213, PETRI_PLACES=268, PETRI_TRANSITIONS=552} [2024-06-20 16:13:44,375 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 223 predicate places. [2024-06-20 16:13:44,375 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 552 transitions, 8213 flow [2024-06-20 16:13:44,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:13:44,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:44,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:44,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:13:44,376 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)] === [2024-06-20 16:13:44,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:44,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1905127032, now seen corresponding path program 8 times [2024-06-20 16:13:44,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:44,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517671869] [2024-06-20 16:13:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:44,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:45,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:45,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517671869] [2024-06-20 16:13:45,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517671869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:45,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:45,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:45,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869189562] [2024-06-20 16:13:45,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:45,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:45,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:45,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:45,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:45,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:13:45,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 552 transitions, 8213 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:13:45,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:45,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:13:45,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:47,252 INFO L124 PetriNetUnfolderBase]: 4094/6300 cut-off events. [2024-06-20 16:13:47,253 INFO L125 PetriNetUnfolderBase]: For 575958/575965 co-relation queries the response was YES. [2024-06-20 16:13:47,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58335 conditions, 6300 events. 4094/6300 cut-off events. For 575958/575965 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35332 event pairs, 1434 based on Foata normal form. 2/6296 useless extension candidates. Maximal degree in co-relation 58221. Up to 5701 conditions per place. [2024-06-20 16:13:47,330 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 451 selfloop transitions, 128 changer transitions 0/585 dead transitions. [2024-06-20 16:13:47,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 585 transitions, 9635 flow [2024-06-20 16:13:47,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:13:47,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:13:47,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-20 16:13:47,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-20 16:13:47,332 INFO L175 Difference]: Start difference. First operand has 268 places, 552 transitions, 8213 flow. Second operand 10 states and 185 transitions. [2024-06-20 16:13:47,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 585 transitions, 9635 flow [2024-06-20 16:13:48,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 585 transitions, 8843 flow, removed 42 selfloop flow, removed 12 redundant places. [2024-06-20 16:13:48,038 INFO L231 Difference]: Finished difference. Result has 266 places, 555 transitions, 7714 flow [2024-06-20 16:13:48,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7421, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7714, PETRI_PLACES=266, PETRI_TRANSITIONS=555} [2024-06-20 16:13:48,039 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 221 predicate places. [2024-06-20 16:13:48,039 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 555 transitions, 7714 flow [2024-06-20 16:13:48,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:13:48,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:48,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:48,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:13:48,039 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:48,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:48,040 INFO L85 PathProgramCache]: Analyzing trace with hash 500049978, now seen corresponding path program 2 times [2024-06-20 16:13:48,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:48,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764297453] [2024-06-20 16:13:48,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:48,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:48,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:48,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764297453] [2024-06-20 16:13:48,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764297453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:48,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:48,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:13:48,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728196932] [2024-06-20 16:13:48,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:48,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:13:48,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:48,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:13:48,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:13:48,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:13:48,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 555 transitions, 7714 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:48,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:48,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:13:48,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:50,230 INFO L124 PetriNetUnfolderBase]: 4249/6624 cut-off events. [2024-06-20 16:13:50,231 INFO L125 PetriNetUnfolderBase]: For 642475/642494 co-relation queries the response was YES. [2024-06-20 16:13:50,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60976 conditions, 6624 events. 4249/6624 cut-off events. For 642475/642494 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 37735 event pairs, 1333 based on Foata normal form. 12/6613 useless extension candidates. Maximal degree in co-relation 60863. Up to 5965 conditions per place. [2024-06-20 16:13:50,314 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 446 selfloop transitions, 42 changer transitions 0/572 dead transitions. [2024-06-20 16:13:50,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 572 transitions, 8914 flow [2024-06-20 16:13:50,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:13:50,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:13:50,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-20 16:13:50,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-20 16:13:50,315 INFO L175 Difference]: Start difference. First operand has 266 places, 555 transitions, 7714 flow. Second operand 6 states and 122 transitions. [2024-06-20 16:13:50,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 572 transitions, 8914 flow [2024-06-20 16:13:51,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 572 transitions, 8640 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 16:13:51,209 INFO L231 Difference]: Finished difference. Result has 263 places, 558 transitions, 7577 flow [2024-06-20 16:13:51,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7440, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7577, PETRI_PLACES=263, PETRI_TRANSITIONS=558} [2024-06-20 16:13:51,209 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 218 predicate places. [2024-06-20 16:13:51,209 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 558 transitions, 7577 flow [2024-06-20 16:13:51,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:51,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:51,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:51,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:13:51,210 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)] === [2024-06-20 16:13:51,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:51,210 INFO L85 PathProgramCache]: Analyzing trace with hash -985923140, now seen corresponding path program 11 times [2024-06-20 16:13:51,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:51,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307223508] [2024-06-20 16:13:51,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:51,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:52,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:52,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307223508] [2024-06-20 16:13:52,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307223508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:52,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:52,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:52,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125177326] [2024-06-20 16:13:52,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:52,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:52,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:52,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:52,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:52,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:13:52,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 558 transitions, 7577 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:52,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:52,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:13:52,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:53,940 INFO L124 PetriNetUnfolderBase]: 3933/6142 cut-off events. [2024-06-20 16:13:53,941 INFO L125 PetriNetUnfolderBase]: For 583249/583257 co-relation queries the response was YES. [2024-06-20 16:13:53,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56078 conditions, 6142 events. 3933/6142 cut-off events. For 583249/583257 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 35234 event pairs, 1376 based on Foata normal form. 5/6127 useless extension candidates. Maximal degree in co-relation 55964. Up to 5561 conditions per place. [2024-06-20 16:13:54,017 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 506 selfloop transitions, 26 changer transitions 0/587 dead transitions. [2024-06-20 16:13:54,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 587 transitions, 8912 flow [2024-06-20 16:13:54,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:13:54,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:13:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 16:13:54,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-20 16:13:54,018 INFO L175 Difference]: Start difference. First operand has 263 places, 558 transitions, 7577 flow. Second operand 9 states and 174 transitions. [2024-06-20 16:13:54,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 587 transitions, 8912 flow [2024-06-20 16:13:54,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 587 transitions, 8838 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 16:13:54,692 INFO L231 Difference]: Finished difference. Result has 268 places, 560 transitions, 7644 flow [2024-06-20 16:13:54,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7503, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7644, PETRI_PLACES=268, PETRI_TRANSITIONS=560} [2024-06-20 16:13:54,693 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 223 predicate places. [2024-06-20 16:13:54,693 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 560 transitions, 7644 flow [2024-06-20 16:13:54,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:54,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:54,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:54,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:13:54,693 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)] === [2024-06-20 16:13:54,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:54,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1056499994, now seen corresponding path program 9 times [2024-06-20 16:13:54,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:54,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185017351] [2024-06-20 16:13:54,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:54,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:55,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:55,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185017351] [2024-06-20 16:13:55,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185017351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:55,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:55,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:55,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650643683] [2024-06-20 16:13:55,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:55,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:55,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:55,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:55,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:56,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:13:56,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 560 transitions, 7644 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:13:56,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:56,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:13:56,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:57,504 INFO L124 PetriNetUnfolderBase]: 4107/6313 cut-off events. [2024-06-20 16:13:57,504 INFO L125 PetriNetUnfolderBase]: For 584619/584623 co-relation queries the response was YES. [2024-06-20 16:13:57,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57747 conditions, 6313 events. 4107/6313 cut-off events. For 584619/584623 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35365 event pairs, 1445 based on Foata normal form. 2/6310 useless extension candidates. Maximal degree in co-relation 57633. Up to 5853 conditions per place. [2024-06-20 16:13:57,584 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 534 selfloop transitions, 60 changer transitions 0/600 dead transitions. [2024-06-20 16:13:57,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 600 transitions, 9508 flow [2024-06-20 16:13:57,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:13:57,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:13:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 16:13:57,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954545454545456 [2024-06-20 16:13:57,585 INFO L175 Difference]: Start difference. First operand has 268 places, 560 transitions, 7644 flow. Second operand 10 states and 189 transitions. [2024-06-20 16:13:57,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 600 transitions, 9508 flow [2024-06-20 16:13:58,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 600 transitions, 9385 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-20 16:13:58,273 INFO L231 Difference]: Finished difference. Result has 271 places, 566 transitions, 7853 flow [2024-06-20 16:13:58,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7521, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7853, PETRI_PLACES=271, PETRI_TRANSITIONS=566} [2024-06-20 16:13:58,273 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 226 predicate places. [2024-06-20 16:13:58,274 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 566 transitions, 7853 flow [2024-06-20 16:13:58,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:13:58,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:58,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:58,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:13:58,274 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)] === [2024-06-20 16:13:58,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:58,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1049828918, now seen corresponding path program 10 times [2024-06-20 16:13:58,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:58,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586293822] [2024-06-20 16:13:58,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:58,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:59,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:59,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586293822] [2024-06-20 16:13:59,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586293822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:59,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:59,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:59,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200780831] [2024-06-20 16:13:59,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:59,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:59,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:59,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:59,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:59,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:13:59,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 566 transitions, 7853 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:13:59,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:59,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:13:59,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:00,634 INFO L124 PetriNetUnfolderBase]: 4143/6371 cut-off events. [2024-06-20 16:14:00,634 INFO L125 PetriNetUnfolderBase]: For 614050/614054 co-relation queries the response was YES. [2024-06-20 16:14:00,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58880 conditions, 6371 events. 4143/6371 cut-off events. For 614050/614054 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 35825 event pairs, 1447 based on Foata normal form. 6/6372 useless extension candidates. Maximal degree in co-relation 58765. Up to 5978 conditions per place. [2024-06-20 16:14:00,718 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 569 selfloop transitions, 31 changer transitions 0/606 dead transitions. [2024-06-20 16:14:00,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 606 transitions, 9541 flow [2024-06-20 16:14:00,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:14:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:14:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 16:14:00,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-20 16:14:00,719 INFO L175 Difference]: Start difference. First operand has 271 places, 566 transitions, 7853 flow. Second operand 9 states and 168 transitions. [2024-06-20 16:14:00,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 606 transitions, 9541 flow [2024-06-20 16:14:01,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 606 transitions, 9350 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-20 16:14:01,375 INFO L231 Difference]: Finished difference. Result has 274 places, 574 transitions, 7973 flow [2024-06-20 16:14:01,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7662, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7973, PETRI_PLACES=274, PETRI_TRANSITIONS=574} [2024-06-20 16:14:01,375 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 229 predicate places. [2024-06-20 16:14:01,376 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 574 transitions, 7973 flow [2024-06-20 16:14:01,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:14:01,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:01,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:01,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:14:01,376 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)] === [2024-06-20 16:14:01,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:01,376 INFO L85 PathProgramCache]: Analyzing trace with hash 329653118, now seen corresponding path program 11 times [2024-06-20 16:14:01,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:01,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115321634] [2024-06-20 16:14:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:01,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:02,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:02,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115321634] [2024-06-20 16:14:02,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115321634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:02,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:02,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:02,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114211537] [2024-06-20 16:14:02,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:02,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:02,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:02,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:02,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:02,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:14:02,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 574 transitions, 7973 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:14:02,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:02,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:14:02,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:03,765 INFO L124 PetriNetUnfolderBase]: 4179/6422 cut-off events. [2024-06-20 16:14:03,765 INFO L125 PetriNetUnfolderBase]: For 634786/634790 co-relation queries the response was YES. [2024-06-20 16:14:03,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59681 conditions, 6422 events. 4179/6422 cut-off events. For 634786/634790 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 36092 event pairs, 1444 based on Foata normal form. 6/6423 useless extension candidates. Maximal degree in co-relation 59564. Up to 5777 conditions per place. [2024-06-20 16:14:03,847 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 524 selfloop transitions, 93 changer transitions 0/623 dead transitions. [2024-06-20 16:14:03,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 623 transitions, 10059 flow [2024-06-20 16:14:03,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:14:03,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:14:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-20 16:14:03,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-20 16:14:03,848 INFO L175 Difference]: Start difference. First operand has 274 places, 574 transitions, 7973 flow. Second operand 9 states and 177 transitions. [2024-06-20 16:14:03,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 623 transitions, 10059 flow [2024-06-20 16:14:04,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 623 transitions, 9846 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-20 16:14:04,608 INFO L231 Difference]: Finished difference. Result has 276 places, 582 transitions, 8194 flow [2024-06-20 16:14:04,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7760, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8194, PETRI_PLACES=276, PETRI_TRANSITIONS=582} [2024-06-20 16:14:04,611 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 231 predicate places. [2024-06-20 16:14:04,612 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 582 transitions, 8194 flow [2024-06-20 16:14:04,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:14:04,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:04,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:04,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:14:04,612 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)] === [2024-06-20 16:14:04,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:04,613 INFO L85 PathProgramCache]: Analyzing trace with hash 329832608, now seen corresponding path program 12 times [2024-06-20 16:14:04,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:04,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353408473] [2024-06-20 16:14:04,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:04,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:05,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:05,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353408473] [2024-06-20 16:14:05,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353408473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:05,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:05,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:05,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338069705] [2024-06-20 16:14:05,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:05,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:05,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:05,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:05,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:05,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:14:05,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 582 transitions, 8194 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:14:05,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:05,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:14:05,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:07,247 INFO L124 PetriNetUnfolderBase]: 4267/6557 cut-off events. [2024-06-20 16:14:07,247 INFO L125 PetriNetUnfolderBase]: For 669961/669965 co-relation queries the response was YES. [2024-06-20 16:14:07,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61760 conditions, 6557 events. 4267/6557 cut-off events. For 669961/669965 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 37055 event pairs, 1454 based on Foata normal form. 6/6558 useless extension candidates. Maximal degree in co-relation 61642. Up to 5854 conditions per place. [2024-06-20 16:14:07,335 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 537 selfloop transitions, 103 changer transitions 0/646 dead transitions. [2024-06-20 16:14:07,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 646 transitions, 10899 flow [2024-06-20 16:14:07,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:14:07,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:14:07,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-20 16:14:07,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-20 16:14:07,336 INFO L175 Difference]: Start difference. First operand has 276 places, 582 transitions, 8194 flow. Second operand 9 states and 180 transitions. [2024-06-20 16:14:07,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 646 transitions, 10899 flow [2024-06-20 16:14:08,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 646 transitions, 10353 flow, removed 146 selfloop flow, removed 7 redundant places. [2024-06-20 16:14:08,335 INFO L231 Difference]: Finished difference. Result has 278 places, 598 transitions, 8369 flow [2024-06-20 16:14:08,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7756, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8369, PETRI_PLACES=278, PETRI_TRANSITIONS=598} [2024-06-20 16:14:08,336 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 233 predicate places. [2024-06-20 16:14:08,336 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 598 transitions, 8369 flow [2024-06-20 16:14:08,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:14:08,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:08,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:08,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:14:08,336 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)] === [2024-06-20 16:14:08,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:08,337 INFO L85 PathProgramCache]: Analyzing trace with hash 329825912, now seen corresponding path program 10 times [2024-06-20 16:14:08,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:08,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958018047] [2024-06-20 16:14:08,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:08,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:09,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:09,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958018047] [2024-06-20 16:14:09,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958018047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:09,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:09,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:09,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442825445] [2024-06-20 16:14:09,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:09,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:09,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:09,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:09,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:09,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:14:09,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 598 transitions, 8369 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:14:09,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:09,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:14:09,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:10,994 INFO L124 PetriNetUnfolderBase]: 4278/6578 cut-off events. [2024-06-20 16:14:10,994 INFO L125 PetriNetUnfolderBase]: For 676909/676913 co-relation queries the response was YES. [2024-06-20 16:14:11,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61804 conditions, 6578 events. 4278/6578 cut-off events. For 676909/676913 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 37271 event pairs, 1456 based on Foata normal form. 2/6575 useless extension candidates. Maximal degree in co-relation 61685. Up to 6138 conditions per place. [2024-06-20 16:14:11,092 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 573 selfloop transitions, 52 changer transitions 0/631 dead transitions. [2024-06-20 16:14:11,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 631 transitions, 9957 flow [2024-06-20 16:14:11,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:14:11,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:14:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 16:14:11,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-20 16:14:11,094 INFO L175 Difference]: Start difference. First operand has 278 places, 598 transitions, 8369 flow. Second operand 9 states and 170 transitions. [2024-06-20 16:14:11,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 631 transitions, 9957 flow [2024-06-20 16:14:11,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 631 transitions, 9673 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-20 16:14:11,945 INFO L231 Difference]: Finished difference. Result has 282 places, 601 transitions, 8272 flow [2024-06-20 16:14:11,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8085, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8272, PETRI_PLACES=282, PETRI_TRANSITIONS=601} [2024-06-20 16:14:11,946 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 237 predicate places. [2024-06-20 16:14:11,946 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 601 transitions, 8272 flow [2024-06-20 16:14:11,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:14:11,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:11,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:11,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:14:11,946 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)] === [2024-06-20 16:14:11,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:11,947 INFO L85 PathProgramCache]: Analyzing trace with hash 329826098, now seen corresponding path program 13 times [2024-06-20 16:14:11,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:11,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056207183] [2024-06-20 16:14:11,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:11,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:12,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:12,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056207183] [2024-06-20 16:14:12,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056207183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:12,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:12,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:12,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610519367] [2024-06-20 16:14:12,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:12,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:12,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:12,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:12,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:12,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:14:12,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 601 transitions, 8272 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:14:12,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:12,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:14:12,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:14,361 INFO L124 PetriNetUnfolderBase]: 4262/6551 cut-off events. [2024-06-20 16:14:14,361 INFO L125 PetriNetUnfolderBase]: For 691712/691716 co-relation queries the response was YES. [2024-06-20 16:14:14,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61179 conditions, 6551 events. 4262/6551 cut-off events. For 691712/691716 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 37085 event pairs, 1451 based on Foata normal form. 6/6552 useless extension candidates. Maximal degree in co-relation 61059. Up to 5857 conditions per place. [2024-06-20 16:14:14,445 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 545 selfloop transitions, 101 changer transitions 0/652 dead transitions. [2024-06-20 16:14:14,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 652 transitions, 10356 flow [2024-06-20 16:14:14,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:14:14,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:14:14,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-20 16:14:14,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-20 16:14:14,447 INFO L175 Difference]: Start difference. First operand has 282 places, 601 transitions, 8272 flow. Second operand 9 states and 180 transitions. [2024-06-20 16:14:14,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 652 transitions, 10356 flow [2024-06-20 16:14:15,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 652 transitions, 10085 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-20 16:14:15,425 INFO L231 Difference]: Finished difference. Result has 284 places, 601 transitions, 8217 flow [2024-06-20 16:14:15,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8001, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8217, PETRI_PLACES=284, PETRI_TRANSITIONS=601} [2024-06-20 16:14:15,426 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 239 predicate places. [2024-06-20 16:14:15,426 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 601 transitions, 8217 flow [2024-06-20 16:14:15,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:14:15,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:15,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:15,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 16:14:15,427 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)] === [2024-06-20 16:14:15,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:15,427 INFO L85 PathProgramCache]: Analyzing trace with hash 557733758, now seen corresponding path program 14 times [2024-06-20 16:14:15,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:15,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727691528] [2024-06-20 16:14:15,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:15,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:16,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:16,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727691528] [2024-06-20 16:14:16,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727691528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:16,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:16,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:16,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117607836] [2024-06-20 16:14:16,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:16,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:16,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:16,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:16,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:16,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:14:16,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 601 transitions, 8217 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:14:16,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:16,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:14:16,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:17,982 INFO L124 PetriNetUnfolderBase]: 4298/6609 cut-off events. [2024-06-20 16:14:17,982 INFO L125 PetriNetUnfolderBase]: For 714317/714321 co-relation queries the response was YES. [2024-06-20 16:14:18,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62005 conditions, 6609 events. 4298/6609 cut-off events. For 714317/714321 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 37466 event pairs, 1455 based on Foata normal form. 6/6610 useless extension candidates. Maximal degree in co-relation 61884. Up to 6076 conditions per place. [2024-06-20 16:14:18,076 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 585 selfloop transitions, 61 changer transitions 0/652 dead transitions. [2024-06-20 16:14:18,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 652 transitions, 10379 flow [2024-06-20 16:14:18,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:14:18,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:14:18,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-20 16:14:18,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-20 16:14:18,078 INFO L175 Difference]: Start difference. First operand has 284 places, 601 transitions, 8217 flow. Second operand 9 states and 175 transitions. [2024-06-20 16:14:18,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 652 transitions, 10379 flow [2024-06-20 16:14:19,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 652 transitions, 10141 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 16:14:19,036 INFO L231 Difference]: Finished difference. Result has 285 places, 609 transitions, 8336 flow [2024-06-20 16:14:19,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7995, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8336, PETRI_PLACES=285, PETRI_TRANSITIONS=609} [2024-06-20 16:14:19,037 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 240 predicate places. [2024-06-20 16:14:19,037 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 609 transitions, 8336 flow [2024-06-20 16:14:19,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:14:19,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:19,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:19,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 16:14:19,037 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:14:19,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:19,038 INFO L85 PathProgramCache]: Analyzing trace with hash 557727248, now seen corresponding path program 15 times [2024-06-20 16:14:19,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:19,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362200135] [2024-06-20 16:14:19,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:19,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:19,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:19,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362200135] [2024-06-20 16:14:19,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362200135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:19,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:19,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:19,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331882906] [2024-06-20 16:14:19,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:19,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:19,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:19,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:19,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:19,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:14:19,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 609 transitions, 8336 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:14:19,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:19,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:14:19,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:21,495 INFO L124 PetriNetUnfolderBase]: 4282/6587 cut-off events. [2024-06-20 16:14:21,496 INFO L125 PetriNetUnfolderBase]: For 722950/722954 co-relation queries the response was YES. [2024-06-20 16:14:21,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61628 conditions, 6587 events. 4282/6587 cut-off events. For 722950/722954 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 37336 event pairs, 1452 based on Foata normal form. 6/6588 useless extension candidates. Maximal degree in co-relation 61506. Up to 6063 conditions per place. [2024-06-20 16:14:21,587 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 576 selfloop transitions, 64 changer transitions 0/646 dead transitions. [2024-06-20 16:14:21,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 646 transitions, 9968 flow [2024-06-20 16:14:21,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:14:21,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:14:21,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 16:14:21,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-20 16:14:21,589 INFO L175 Difference]: Start difference. First operand has 285 places, 609 transitions, 8336 flow. Second operand 9 states and 172 transitions. [2024-06-20 16:14:21,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 646 transitions, 9968 flow [2024-06-20 16:14:22,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 646 transitions, 9534 flow, removed 145 selfloop flow, removed 7 redundant places. [2024-06-20 16:14:22,813 INFO L231 Difference]: Finished difference. Result has 287 places, 609 transitions, 8044 flow [2024-06-20 16:14:22,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7902, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8044, PETRI_PLACES=287, PETRI_TRANSITIONS=609} [2024-06-20 16:14:22,814 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 242 predicate places. [2024-06-20 16:14:22,814 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 609 transitions, 8044 flow [2024-06-20 16:14:22,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:14:22,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:22,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:22,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 16:14:22,815 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:14:22,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:22,815 INFO L85 PathProgramCache]: Analyzing trace with hash 557727062, now seen corresponding path program 11 times [2024-06-20 16:14:22,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:22,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465361991] [2024-06-20 16:14:22,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:22,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:23,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:23,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465361991] [2024-06-20 16:14:23,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465361991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:23,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:23,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:23,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493385152] [2024-06-20 16:14:23,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:23,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:23,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:23,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:23,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:23,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:14:23,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 609 transitions, 8044 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:14:23,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:23,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:14:23,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:25,378 INFO L124 PetriNetUnfolderBase]: 4277/6580 cut-off events. [2024-06-20 16:14:25,378 INFO L125 PetriNetUnfolderBase]: For 727813/727817 co-relation queries the response was YES. [2024-06-20 16:14:25,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61347 conditions, 6580 events. 4277/6580 cut-off events. For 727813/727817 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 37345 event pairs, 1452 based on Foata normal form. 2/6577 useless extension candidates. Maximal degree in co-relation 61224. Up to 6206 conditions per place. [2024-06-20 16:14:25,473 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 602 selfloop transitions, 27 changer transitions 0/635 dead transitions. [2024-06-20 16:14:25,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 635 transitions, 9492 flow [2024-06-20 16:14:25,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:14:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:14:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:14:25,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-20 16:14:25,475 INFO L175 Difference]: Start difference. First operand has 287 places, 609 transitions, 8044 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:14:25,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 635 transitions, 9492 flow [2024-06-20 16:14:26,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 635 transitions, 9225 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-20 16:14:26,656 INFO L231 Difference]: Finished difference. Result has 287 places, 609 transitions, 7840 flow [2024-06-20 16:14:26,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7777, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7840, PETRI_PLACES=287, PETRI_TRANSITIONS=609} [2024-06-20 16:14:26,657 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 242 predicate places. [2024-06-20 16:14:26,657 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 609 transitions, 7840 flow [2024-06-20 16:14:26,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-20 16:14:26,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:26,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:26,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 16:14:26,658 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:14:26,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:26,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1981780848, now seen corresponding path program 3 times [2024-06-20 16:14:26,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:26,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450336396] [2024-06-20 16:14:26,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:26,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:27,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:27,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450336396] [2024-06-20 16:14:27,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450336396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:27,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:27,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:14:27,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747270501] [2024-06-20 16:14:27,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:27,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:14:27,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:27,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:14:27,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:14:27,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-20 16:14:27,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 609 transitions, 7840 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:27,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:27,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-20 16:14:27,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:28,891 INFO L124 PetriNetUnfolderBase]: 4486/6977 cut-off events. [2024-06-20 16:14:28,891 INFO L125 PetriNetUnfolderBase]: For 820994/821049 co-relation queries the response was YES. [2024-06-20 16:14:28,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64546 conditions, 6977 events. 4486/6977 cut-off events. For 820994/821049 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 40218 event pairs, 1661 based on Foata normal form. 19/6935 useless extension candidates. Maximal degree in co-relation 64422. Up to 6369 conditions per place. [2024-06-20 16:14:28,991 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 518 selfloop transitions, 12 changer transitions 0/617 dead transitions. [2024-06-20 16:14:28,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 617 transitions, 8942 flow [2024-06-20 16:14:28,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:14:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:14:28,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-20 16:14:28,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42803030303030304 [2024-06-20 16:14:28,993 INFO L175 Difference]: Start difference. First operand has 287 places, 609 transitions, 7840 flow. Second operand 6 states and 113 transitions. [2024-06-20 16:14:28,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 617 transitions, 8942 flow [2024-06-20 16:14:29,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 617 transitions, 8854 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 16:14:29,952 INFO L231 Difference]: Finished difference. Result has 285 places, 609 transitions, 7782 flow [2024-06-20 16:14:29,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7752, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7782, PETRI_PLACES=285, PETRI_TRANSITIONS=609} [2024-06-20 16:14:29,953 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 240 predicate places. [2024-06-20 16:14:29,953 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 609 transitions, 7782 flow [2024-06-20 16:14:29,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:29,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:29,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:29,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 16:14:29,953 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:14:29,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:29,954 INFO L85 PathProgramCache]: Analyzing trace with hash 505769850, now seen corresponding path program 1 times [2024-06-20 16:14:29,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:29,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888024011] [2024-06-20 16:14:29,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:29,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:30,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:30,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888024011] [2024-06-20 16:14:30,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888024011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:30,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:30,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:14:30,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497663572] [2024-06-20 16:14:30,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:30,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:14:30,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:30,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:14:30,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:14:30,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:14:30,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 609 transitions, 7782 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) [2024-06-20 16:14:30,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:30,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:14:30,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:32,315 INFO L124 PetriNetUnfolderBase]: 4788/7330 cut-off events. [2024-06-20 16:14:32,315 INFO L125 PetriNetUnfolderBase]: For 841945/841949 co-relation queries the response was YES. [2024-06-20 16:14:32,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66795 conditions, 7330 events. 4788/7330 cut-off events. For 841945/841949 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 41061 event pairs, 1725 based on Foata normal form. 2/7316 useless extension candidates. Maximal degree in co-relation 66670. Up to 6828 conditions per place. [2024-06-20 16:14:32,422 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 552 selfloop transitions, 18 changer transitions 0/627 dead transitions. [2024-06-20 16:14:32,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 627 transitions, 9204 flow [2024-06-20 16:14:32,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:14:32,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:14:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 16:14:32,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40584415584415584 [2024-06-20 16:14:32,423 INFO L175 Difference]: Start difference. First operand has 285 places, 609 transitions, 7782 flow. Second operand 7 states and 125 transitions. [2024-06-20 16:14:32,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 627 transitions, 9204 flow [2024-06-20 16:14:33,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 627 transitions, 9131 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 16:14:33,391 INFO L231 Difference]: Finished difference. Result has 287 places, 615 transitions, 7839 flow [2024-06-20 16:14:33,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7711, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7839, PETRI_PLACES=287, PETRI_TRANSITIONS=615} [2024-06-20 16:14:33,392 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 242 predicate places. [2024-06-20 16:14:33,392 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 615 transitions, 7839 flow [2024-06-20 16:14:33,392 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) [2024-06-20 16:14:33,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:33,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:33,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 16:14:33,393 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:14:33,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:33,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2030048220, now seen corresponding path program 2 times [2024-06-20 16:14:33,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:33,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939910717] [2024-06-20 16:14:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:33,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:34,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:34,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939910717] [2024-06-20 16:14:34,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939910717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:34,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:34,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:14:34,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239835910] [2024-06-20 16:14:34,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:34,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:14:34,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:34,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:14:34,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:14:34,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:14:34,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 615 transitions, 7839 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) [2024-06-20 16:14:34,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:34,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:14:34,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:35,818 INFO L124 PetriNetUnfolderBase]: 4785/7327 cut-off events. [2024-06-20 16:14:35,819 INFO L125 PetriNetUnfolderBase]: For 838370/838377 co-relation queries the response was YES. [2024-06-20 16:14:35,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66707 conditions, 7327 events. 4785/7327 cut-off events. For 838370/838377 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 41073 event pairs, 1728 based on Foata normal form. 4/7314 useless extension candidates. Maximal degree in co-relation 66581. Up to 6825 conditions per place. [2024-06-20 16:14:35,923 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 548 selfloop transitions, 18 changer transitions 0/623 dead transitions. [2024-06-20 16:14:35,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 623 transitions, 9013 flow [2024-06-20 16:14:35,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:14:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:14:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 16:14:35,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 16:14:35,924 INFO L175 Difference]: Start difference. First operand has 287 places, 615 transitions, 7839 flow. Second operand 7 states and 121 transitions. [2024-06-20 16:14:35,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 623 transitions, 9013 flow [2024-06-20 16:14:36,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 623 transitions, 8930 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-20 16:14:37,002 INFO L231 Difference]: Finished difference. Result has 291 places, 615 transitions, 7798 flow [2024-06-20 16:14:37,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7756, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7798, PETRI_PLACES=291, PETRI_TRANSITIONS=615} [2024-06-20 16:14:37,003 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 246 predicate places. [2024-06-20 16:14:37,003 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 615 transitions, 7798 flow [2024-06-20 16:14:37,003 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) [2024-06-20 16:14:37,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:37,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:37,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 16:14:37,003 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:14:37,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:37,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1502539252, now seen corresponding path program 1 times [2024-06-20 16:14:37,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:37,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528436635] [2024-06-20 16:14:37,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:37,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:38,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:38,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528436635] [2024-06-20 16:14:38,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528436635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:38,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:38,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:14:38,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491685726] [2024-06-20 16:14:38,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:38,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:14:38,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:38,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:14:38,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:14:38,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-20 16:14:38,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 615 transitions, 7798 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) [2024-06-20 16:14:38,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:38,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-20 16:14:38,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:40,258 INFO L124 PetriNetUnfolderBase]: 4946/7479 cut-off events. [2024-06-20 16:14:40,259 INFO L125 PetriNetUnfolderBase]: For 857195/857195 co-relation queries the response was YES. [2024-06-20 16:14:40,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67760 conditions, 7479 events. 4946/7479 cut-off events. For 857195/857195 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 41026 event pairs, 1735 based on Foata normal form. 4/7480 useless extension candidates. Maximal degree in co-relation 67632. Up to 7156 conditions per place. [2024-06-20 16:14:40,359 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 620 selfloop transitions, 22 changer transitions 0/647 dead transitions. [2024-06-20 16:14:40,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 647 transitions, 9379 flow [2024-06-20 16:14:40,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:14:40,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:14:40,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:14:40,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-06-20 16:14:40,361 INFO L175 Difference]: Start difference. First operand has 291 places, 615 transitions, 7798 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:14:40,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 647 transitions, 9379 flow [2024-06-20 16:14:41,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 647 transitions, 9331 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:14:41,636 INFO L231 Difference]: Finished difference. Result has 295 places, 620 transitions, 7908 flow [2024-06-20 16:14:41,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7750, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7908, PETRI_PLACES=295, PETRI_TRANSITIONS=620} [2024-06-20 16:14:41,637 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 250 predicate places. [2024-06-20 16:14:41,637 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 620 transitions, 7908 flow [2024-06-20 16:14:41,637 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) [2024-06-20 16:14:41,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:41,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:41,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 16:14:41,638 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:14:41,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:41,639 INFO L85 PathProgramCache]: Analyzing trace with hash 513398330, now seen corresponding path program 1 times [2024-06-20 16:14:41,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:41,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498939362] [2024-06-20 16:14:41,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:41,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:42,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:42,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:42,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498939362] [2024-06-20 16:14:42,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498939362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:42,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:42,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:14:42,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365646960] [2024-06-20 16:14:42,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:42,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:14:42,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:42,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:14:42,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:14:42,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:14:42,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 620 transitions, 7908 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:42,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:42,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:14:42,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:44,217 INFO L124 PetriNetUnfolderBase]: 4648/7131 cut-off events. [2024-06-20 16:14:44,217 INFO L125 PetriNetUnfolderBase]: For 879626/879686 co-relation queries the response was YES. [2024-06-20 16:14:44,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66068 conditions, 7131 events. 4648/7131 cut-off events. For 879626/879686 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 40069 event pairs, 1745 based on Foata normal form. 22/7089 useless extension candidates. Maximal degree in co-relation 65938. Up to 6663 conditions per place. [2024-06-20 16:14:44,303 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 534 selfloop transitions, 15 changer transitions 0/634 dead transitions. [2024-06-20 16:14:44,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 634 transitions, 9090 flow [2024-06-20 16:14:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:14:44,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:14:44,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 16:14:44,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-20 16:14:44,304 INFO L175 Difference]: Start difference. First operand has 295 places, 620 transitions, 7908 flow. Second operand 7 states and 124 transitions. [2024-06-20 16:14:44,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 634 transitions, 9090 flow [2024-06-20 16:14:45,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 634 transitions, 8983 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 16:14:45,318 INFO L231 Difference]: Finished difference. Result has 296 places, 623 transitions, 7879 flow [2024-06-20 16:14:45,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7801, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7879, PETRI_PLACES=296, PETRI_TRANSITIONS=623} [2024-06-20 16:14:45,318 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 251 predicate places. [2024-06-20 16:14:45,318 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 623 transitions, 7879 flow [2024-06-20 16:14:45,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:45,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:45,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:45,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 16:14:45,332 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:14:45,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:45,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1364956350, now seen corresponding path program 1 times [2024-06-20 16:14:45,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:45,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027108318] [2024-06-20 16:14:45,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:45,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:46,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:46,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027108318] [2024-06-20 16:14:46,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027108318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:46,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:46,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:46,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575039018] [2024-06-20 16:14:46,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:46,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:46,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:46,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:46,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:46,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:14:46,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 623 transitions, 7879 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:46,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:46,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:14:46,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:48,289 INFO L124 PetriNetUnfolderBase]: 4654/7132 cut-off events. [2024-06-20 16:14:48,289 INFO L125 PetriNetUnfolderBase]: For 923594/923603 co-relation queries the response was YES. [2024-06-20 16:14:48,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68388 conditions, 7132 events. 4654/7132 cut-off events. For 923594/923603 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 40272 event pairs, 941 based on Foata normal form. 12/7132 useless extension candidates. Maximal degree in co-relation 68257. Up to 5615 conditions per place. [2024-06-20 16:14:48,381 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 496 selfloop transitions, 172 changer transitions 0/675 dead transitions. [2024-06-20 16:14:48,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 675 transitions, 10123 flow [2024-06-20 16:14:48,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:14:48,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:14:48,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-20 16:14:48,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44834710743801653 [2024-06-20 16:14:48,383 INFO L175 Difference]: Start difference. First operand has 296 places, 623 transitions, 7879 flow. Second operand 11 states and 217 transitions. [2024-06-20 16:14:48,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 675 transitions, 10123 flow [2024-06-20 16:14:49,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 675 transitions, 10067 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 16:14:49,510 INFO L231 Difference]: Finished difference. Result has 303 places, 630 transitions, 8487 flow [2024-06-20 16:14:49,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7823, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8487, PETRI_PLACES=303, PETRI_TRANSITIONS=630} [2024-06-20 16:14:49,511 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 258 predicate places. [2024-06-20 16:14:49,511 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 630 transitions, 8487 flow [2024-06-20 16:14:49,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:49,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:49,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:49,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 16:14:49,512 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:14:49,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:49,512 INFO L85 PathProgramCache]: Analyzing trace with hash -332466071, now seen corresponding path program 3 times [2024-06-20 16:14:49,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:49,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113699432] [2024-06-20 16:14:49,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:49,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:50,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:50,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113699432] [2024-06-20 16:14:50,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113699432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:50,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:50,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:50,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329325659] [2024-06-20 16:14:50,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:50,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:50,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:50,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:50,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:50,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:14:50,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 630 transitions, 8487 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:50,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:50,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:14:50,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:52,579 INFO L124 PetriNetUnfolderBase]: 4744/7301 cut-off events. [2024-06-20 16:14:52,580 INFO L125 PetriNetUnfolderBase]: For 960088/960092 co-relation queries the response was YES. [2024-06-20 16:14:52,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71186 conditions, 7301 events. 4744/7301 cut-off events. For 960088/960092 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 41676 event pairs, 1152 based on Foata normal form. 8/7302 useless extension candidates. Maximal degree in co-relation 71053. Up to 6237 conditions per place. [2024-06-20 16:14:52,682 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 518 selfloop transitions, 172 changer transitions 0/697 dead transitions. [2024-06-20 16:14:52,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 697 transitions, 10948 flow [2024-06-20 16:14:52,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:14:52,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:14:52,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 239 transitions. [2024-06-20 16:14:52,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45265151515151514 [2024-06-20 16:14:52,684 INFO L175 Difference]: Start difference. First operand has 303 places, 630 transitions, 8487 flow. Second operand 12 states and 239 transitions. [2024-06-20 16:14:52,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 697 transitions, 10948 flow [2024-06-20 16:14:53,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 697 transitions, 10634 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-20 16:14:53,915 INFO L231 Difference]: Finished difference. Result has 310 places, 650 transitions, 9002 flow [2024-06-20 16:14:53,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8187, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9002, PETRI_PLACES=310, PETRI_TRANSITIONS=650} [2024-06-20 16:14:53,915 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 265 predicate places. [2024-06-20 16:14:53,915 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 650 transitions, 9002 flow [2024-06-20 16:14:53,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:53,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:53,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:53,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 16:14:53,916 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:14:53,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:53,917 INFO L85 PathProgramCache]: Analyzing trace with hash -430419406, now seen corresponding path program 2 times [2024-06-20 16:14:53,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:53,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795009960] [2024-06-20 16:14:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:53,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:54,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:54,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:54,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795009960] [2024-06-20 16:14:54,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795009960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:54,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:54,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:54,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349154760] [2024-06-20 16:14:54,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:54,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:54,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:54,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:54,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:54,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:14:54,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 650 transitions, 9002 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:54,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:54,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:14:54,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:56,834 INFO L124 PetriNetUnfolderBase]: 4824/7413 cut-off events. [2024-06-20 16:14:56,834 INFO L125 PetriNetUnfolderBase]: For 1009122/1009131 co-relation queries the response was YES. [2024-06-20 16:14:56,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73497 conditions, 7413 events. 4824/7413 cut-off events. For 1009122/1009131 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 42447 event pairs, 1175 based on Foata normal form. 14/7416 useless extension candidates. Maximal degree in co-relation 73361. Up to 6261 conditions per place. [2024-06-20 16:14:56,948 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 534 selfloop transitions, 167 changer transitions 0/708 dead transitions. [2024-06-20 16:14:56,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 708 transitions, 11124 flow [2024-06-20 16:14:56,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:14:56,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:14:56,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 235 transitions. [2024-06-20 16:14:56,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44507575757575757 [2024-06-20 16:14:56,950 INFO L175 Difference]: Start difference. First operand has 310 places, 650 transitions, 9002 flow. Second operand 12 states and 235 transitions. [2024-06-20 16:14:56,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 708 transitions, 11124 flow [2024-06-20 16:14:58,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 708 transitions, 10911 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-20 16:14:58,111 INFO L231 Difference]: Finished difference. Result has 315 places, 660 transitions, 9371 flow [2024-06-20 16:14:58,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8797, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9371, PETRI_PLACES=315, PETRI_TRANSITIONS=660} [2024-06-20 16:14:58,112 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 270 predicate places. [2024-06-20 16:14:58,112 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 660 transitions, 9371 flow [2024-06-20 16:14:58,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:58,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:58,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:58,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 16:14:58,113 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:14:58,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:58,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1564472566, now seen corresponding path program 3 times [2024-06-20 16:14:58,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:58,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566156223] [2024-06-20 16:14:58,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:58,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:59,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:59,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566156223] [2024-06-20 16:14:59,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566156223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:59,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:59,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:59,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425569985] [2024-06-20 16:14:59,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:59,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:59,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:59,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:59,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:59,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:14:59,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 660 transitions, 9371 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:59,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:59,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:14:59,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:01,404 INFO L124 PetriNetUnfolderBase]: 4852/7467 cut-off events. [2024-06-20 16:15:01,405 INFO L125 PetriNetUnfolderBase]: For 1034403/1034407 co-relation queries the response was YES. [2024-06-20 16:15:01,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74462 conditions, 7467 events. 4852/7467 cut-off events. For 1034403/1034407 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 42864 event pairs, 1261 based on Foata normal form. 10/7466 useless extension candidates. Maximal degree in co-relation 74324. Up to 6654 conditions per place. [2024-06-20 16:15:01,515 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 553 selfloop transitions, 144 changer transitions 0/704 dead transitions. [2024-06-20 16:15:01,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 704 transitions, 11096 flow [2024-06-20 16:15:01,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:15:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:15:01,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 230 transitions. [2024-06-20 16:15:01,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2024-06-20 16:15:01,516 INFO L175 Difference]: Start difference. First operand has 315 places, 660 transitions, 9371 flow. Second operand 12 states and 230 transitions. [2024-06-20 16:15:01,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 704 transitions, 11096 flow [2024-06-20 16:15:02,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 704 transitions, 10842 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-20 16:15:02,935 INFO L231 Difference]: Finished difference. Result has 319 places, 664 transitions, 9535 flow [2024-06-20 16:15:02,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9117, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9535, PETRI_PLACES=319, PETRI_TRANSITIONS=664} [2024-06-20 16:15:02,935 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 274 predicate places. [2024-06-20 16:15:02,935 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 664 transitions, 9535 flow [2024-06-20 16:15:02,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:02,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:02,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:02,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 16:15:02,936 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:15:02,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:02,937 INFO L85 PathProgramCache]: Analyzing trace with hash -332628046, now seen corresponding path program 4 times [2024-06-20 16:15:02,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:02,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031366493] [2024-06-20 16:15:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:02,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:02,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:03,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:03,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031366493] [2024-06-20 16:15:03,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031366493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:03,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:03,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:15:03,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968356237] [2024-06-20 16:15:03,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:03,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:15:03,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:03,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:15:03,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:15:04,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:15:04,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 664 transitions, 9535 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:04,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:04,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:15:04,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:06,130 INFO L124 PetriNetUnfolderBase]: 4855/7468 cut-off events. [2024-06-20 16:15:06,130 INFO L125 PetriNetUnfolderBase]: For 1052628/1052632 co-relation queries the response was YES. [2024-06-20 16:15:06,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74872 conditions, 7468 events. 4855/7468 cut-off events. For 1052628/1052632 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 42940 event pairs, 1233 based on Foata normal form. 10/7467 useless extension candidates. Maximal degree in co-relation 74732. Up to 6525 conditions per place. [2024-06-20 16:15:06,245 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 548 selfloop transitions, 153 changer transitions 0/708 dead transitions. [2024-06-20 16:15:06,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 708 transitions, 11212 flow [2024-06-20 16:15:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:15:06,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:15:06,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 231 transitions. [2024-06-20 16:15:06,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 16:15:06,246 INFO L175 Difference]: Start difference. First operand has 319 places, 664 transitions, 9535 flow. Second operand 12 states and 231 transitions. [2024-06-20 16:15:06,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 708 transitions, 11212 flow [2024-06-20 16:15:07,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 708 transitions, 10848 flow, removed 42 selfloop flow, removed 10 redundant places. [2024-06-20 16:15:07,758 INFO L231 Difference]: Finished difference. Result has 321 places, 666 transitions, 9555 flow [2024-06-20 16:15:07,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9171, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9555, PETRI_PLACES=321, PETRI_TRANSITIONS=666} [2024-06-20 16:15:07,758 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 276 predicate places. [2024-06-20 16:15:07,758 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 666 transitions, 9555 flow [2024-06-20 16:15:07,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:07,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:07,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:07,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 16:15:07,759 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:15:07,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:07,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1531840130, now seen corresponding path program 5 times [2024-06-20 16:15:07,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:07,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543446444] [2024-06-20 16:15:07,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:07,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:09,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:09,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543446444] [2024-06-20 16:15:09,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543446444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:09,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:09,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:15:09,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102956015] [2024-06-20 16:15:09,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:09,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:15:09,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:09,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:15:09,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:15:09,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:15:09,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 666 transitions, 9555 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:09,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:09,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:15:09,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:11,223 INFO L124 PetriNetUnfolderBase]: 4984/7660 cut-off events. [2024-06-20 16:15:11,223 INFO L125 PetriNetUnfolderBase]: For 1102278/1102282 co-relation queries the response was YES. [2024-06-20 16:15:11,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77289 conditions, 7660 events. 4984/7660 cut-off events. For 1102278/1102282 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 44185 event pairs, 1225 based on Foata normal form. 10/7661 useless extension candidates. Maximal degree in co-relation 77148. Up to 6706 conditions per place. [2024-06-20 16:15:11,321 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 596 selfloop transitions, 130 changer transitions 0/733 dead transitions. [2024-06-20 16:15:11,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 733 transitions, 11923 flow [2024-06-20 16:15:11,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:15:11,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:15:11,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-20 16:15:11,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412878787878788 [2024-06-20 16:15:11,323 INFO L175 Difference]: Start difference. First operand has 321 places, 666 transitions, 9555 flow. Second operand 12 states and 233 transitions. [2024-06-20 16:15:11,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 733 transitions, 11923 flow [2024-06-20 16:15:12,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 733 transitions, 11477 flow, removed 69 selfloop flow, removed 10 redundant places. [2024-06-20 16:15:12,764 INFO L231 Difference]: Finished difference. Result has 324 places, 684 transitions, 9859 flow [2024-06-20 16:15:12,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9167, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9859, PETRI_PLACES=324, PETRI_TRANSITIONS=684} [2024-06-20 16:15:12,764 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 279 predicate places. [2024-06-20 16:15:12,764 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 684 transitions, 9859 flow [2024-06-20 16:15:12,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:12,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:12,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:12,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 16:15:12,765 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:15:12,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:12,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1616830970, now seen corresponding path program 6 times [2024-06-20 16:15:12,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:12,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954309156] [2024-06-20 16:15:12,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:12,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:14,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:14,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954309156] [2024-06-20 16:15:14,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954309156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:14,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:14,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:15:14,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151287666] [2024-06-20 16:15:14,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:14,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:15:14,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:14,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:15:14,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:15:14,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:15:14,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 684 transitions, 9859 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:14,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:14,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:15:14,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:16,141 INFO L124 PetriNetUnfolderBase]: 5023/7725 cut-off events. [2024-06-20 16:15:16,142 INFO L125 PetriNetUnfolderBase]: For 1136701/1136705 co-relation queries the response was YES. [2024-06-20 16:15:16,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78250 conditions, 7725 events. 5023/7725 cut-off events. For 1136701/1136705 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 44647 event pairs, 1259 based on Foata normal form. 12/7728 useless extension candidates. Maximal degree in co-relation 78107. Up to 6897 conditions per place. [2024-06-20 16:15:16,247 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 605 selfloop transitions, 124 changer transitions 0/736 dead transitions. [2024-06-20 16:15:16,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 736 transitions, 12006 flow [2024-06-20 16:15:16,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:15:16,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:15:16,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 230 transitions. [2024-06-20 16:15:16,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2024-06-20 16:15:16,249 INFO L175 Difference]: Start difference. First operand has 324 places, 684 transitions, 9859 flow. Second operand 12 states and 230 transitions. [2024-06-20 16:15:16,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 736 transitions, 12006 flow [2024-06-20 16:15:18,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 736 transitions, 11799 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-20 16:15:18,105 INFO L231 Difference]: Finished difference. Result has 328 places, 690 transitions, 10112 flow [2024-06-20 16:15:18,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9652, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10112, PETRI_PLACES=328, PETRI_TRANSITIONS=690} [2024-06-20 16:15:18,106 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 283 predicate places. [2024-06-20 16:15:18,106 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 690 transitions, 10112 flow [2024-06-20 16:15:18,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:18,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:18,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:18,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 16:15:18,106 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:15:18,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:18,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1533717800, now seen corresponding path program 7 times [2024-06-20 16:15:18,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:18,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561339041] [2024-06-20 16:15:18,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:18,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:19,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:19,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561339041] [2024-06-20 16:15:19,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561339041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:19,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:19,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:15:19,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153785976] [2024-06-20 16:15:19,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:19,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:15:19,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:19,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:15:19,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:15:19,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:15:19,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 690 transitions, 10112 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:19,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:19,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:15:19,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:21,826 INFO L124 PetriNetUnfolderBase]: 5005/7705 cut-off events. [2024-06-20 16:15:21,826 INFO L125 PetriNetUnfolderBase]: For 1145319/1145323 co-relation queries the response was YES. [2024-06-20 16:15:21,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78029 conditions, 7705 events. 5005/7705 cut-off events. For 1145319/1145323 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 44613 event pairs, 1289 based on Foata normal form. 12/7708 useless extension candidates. Maximal degree in co-relation 77884. Up to 7063 conditions per place. [2024-06-20 16:15:21,944 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 617 selfloop transitions, 110 changer transitions 0/734 dead transitions. [2024-06-20 16:15:21,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 734 transitions, 11771 flow [2024-06-20 16:15:21,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:15:21,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:15:21,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 242 transitions. [2024-06-20 16:15:21,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-06-20 16:15:21,946 INFO L175 Difference]: Start difference. First operand has 328 places, 690 transitions, 10112 flow. Second operand 13 states and 242 transitions. [2024-06-20 16:15:21,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 734 transitions, 11771 flow [2024-06-20 16:15:23,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 734 transitions, 11277 flow, removed 127 selfloop flow, removed 10 redundant places. [2024-06-20 16:15:23,999 INFO L231 Difference]: Finished difference. Result has 331 places, 690 transitions, 9856 flow [2024-06-20 16:15:23,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9618, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9856, PETRI_PLACES=331, PETRI_TRANSITIONS=690} [2024-06-20 16:15:23,999 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 286 predicate places. [2024-06-20 16:15:24,000 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 690 transitions, 9856 flow [2024-06-20 16:15:24,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:24,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:24,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:24,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 16:15:24,000 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:15:24,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:24,000 INFO L85 PathProgramCache]: Analyzing trace with hash 904980849, now seen corresponding path program 4 times [2024-06-20 16:15:24,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:24,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120749832] [2024-06-20 16:15:24,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:24,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:25,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:25,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120749832] [2024-06-20 16:15:25,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120749832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:25,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:25,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:15:25,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707451415] [2024-06-20 16:15:25,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:25,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:15:25,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:25,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:15:25,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:15:25,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:15:25,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 690 transitions, 9856 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:25,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:25,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:15:25,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:27,236 INFO L124 PetriNetUnfolderBase]: 5012/7706 cut-off events. [2024-06-20 16:15:27,237 INFO L125 PetriNetUnfolderBase]: For 1147411/1147419 co-relation queries the response was YES. [2024-06-20 16:15:27,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77761 conditions, 7706 events. 5012/7706 cut-off events. For 1147411/1147419 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 44578 event pairs, 1277 based on Foata normal form. 8/7708 useless extension candidates. Maximal degree in co-relation 77615. Up to 6452 conditions per place. [2024-06-20 16:15:27,353 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 482 selfloop transitions, 246 changer transitions 0/735 dead transitions. [2024-06-20 16:15:27,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 735 transitions, 11725 flow [2024-06-20 16:15:27,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:15:27,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:15:27,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-20 16:15:27,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628099173553719 [2024-06-20 16:15:27,355 INFO L175 Difference]: Start difference. First operand has 331 places, 690 transitions, 9856 flow. Second operand 11 states and 224 transitions. [2024-06-20 16:15:27,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 735 transitions, 11725 flow [2024-06-20 16:15:29,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 735 transitions, 11477 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-20 16:15:29,374 INFO L231 Difference]: Finished difference. Result has 330 places, 693 transitions, 10218 flow [2024-06-20 16:15:29,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9608, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10218, PETRI_PLACES=330, PETRI_TRANSITIONS=693} [2024-06-20 16:15:29,375 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 285 predicate places. [2024-06-20 16:15:29,375 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 693 transitions, 10218 flow [2024-06-20 16:15:29,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:29,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:29,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:29,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 16:15:29,376 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:15:29,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:29,376 INFO L85 PathProgramCache]: Analyzing trace with hash 904975114, now seen corresponding path program 8 times [2024-06-20 16:15:29,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:29,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908696901] [2024-06-20 16:15:29,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:29,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:30,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:30,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908696901] [2024-06-20 16:15:30,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908696901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:30,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:30,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:15:30,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953977791] [2024-06-20 16:15:30,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:30,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:15:30,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:30,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:15:30,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:15:30,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:15:30,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 693 transitions, 10218 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:30,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:30,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:15:30,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:32,756 INFO L124 PetriNetUnfolderBase]: 5029/7739 cut-off events. [2024-06-20 16:15:32,757 INFO L125 PetriNetUnfolderBase]: For 1182003/1182011 co-relation queries the response was YES. [2024-06-20 16:15:32,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79407 conditions, 7739 events. 5029/7739 cut-off events. For 1182003/1182011 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 44799 event pairs, 1311 based on Foata normal form. 8/7736 useless extension candidates. Maximal degree in co-relation 79260. Up to 6926 conditions per place. [2024-06-20 16:15:32,873 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 546 selfloop transitions, 179 changer transitions 0/732 dead transitions. [2024-06-20 16:15:32,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 732 transitions, 12002 flow [2024-06-20 16:15:32,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:15:32,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:15:32,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-20 16:15:32,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-20 16:15:32,874 INFO L175 Difference]: Start difference. First operand has 330 places, 693 transitions, 10218 flow. Second operand 11 states and 214 transitions. [2024-06-20 16:15:32,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 732 transitions, 12002 flow [2024-06-20 16:15:34,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 732 transitions, 11416 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-20 16:15:34,614 INFO L231 Difference]: Finished difference. Result has 332 places, 695 transitions, 10086 flow [2024-06-20 16:15:34,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9632, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10086, PETRI_PLACES=332, PETRI_TRANSITIONS=695} [2024-06-20 16:15:34,615 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 287 predicate places. [2024-06-20 16:15:34,615 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 695 transitions, 10086 flow [2024-06-20 16:15:34,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:34,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:34,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:34,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 16:15:34,615 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:15:34,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:34,616 INFO L85 PathProgramCache]: Analyzing trace with hash 904975269, now seen corresponding path program 5 times [2024-06-20 16:15:34,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:34,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581809655] [2024-06-20 16:15:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:34,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:35,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:35,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581809655] [2024-06-20 16:15:35,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581809655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:35,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:35,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:15:35,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739623815] [2024-06-20 16:15:35,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:35,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:15:35,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:35,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:15:35,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:15:35,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:15:35,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 695 transitions, 10086 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:35,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:35,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:15:35,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:38,140 INFO L124 PetriNetUnfolderBase]: 5083/7816 cut-off events. [2024-06-20 16:15:38,140 INFO L125 PetriNetUnfolderBase]: For 1225914/1225922 co-relation queries the response was YES. [2024-06-20 16:15:38,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80604 conditions, 7816 events. 5083/7816 cut-off events. For 1225914/1225922 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 45448 event pairs, 1277 based on Foata normal form. 8/7818 useless extension candidates. Maximal degree in co-relation 80456. Up to 6493 conditions per place. [2024-06-20 16:15:38,264 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 485 selfloop transitions, 258 changer transitions 0/750 dead transitions. [2024-06-20 16:15:38,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 750 transitions, 12443 flow [2024-06-20 16:15:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:15:38,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:15:38,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 245 transitions. [2024-06-20 16:15:38,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4640151515151515 [2024-06-20 16:15:38,266 INFO L175 Difference]: Start difference. First operand has 332 places, 695 transitions, 10086 flow. Second operand 12 states and 245 transitions. [2024-06-20 16:15:38,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 750 transitions, 12443 flow [2024-06-20 16:15:39,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 750 transitions, 12009 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-20 16:15:39,990 INFO L231 Difference]: Finished difference. Result has 335 places, 701 transitions, 10411 flow [2024-06-20 16:15:39,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9652, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10411, PETRI_PLACES=335, PETRI_TRANSITIONS=701} [2024-06-20 16:15:39,993 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 290 predicate places. [2024-06-20 16:15:39,993 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 701 transitions, 10411 flow [2024-06-20 16:15:39,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:39,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:39,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:39,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 16:15:39,994 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:15:39,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:39,994 INFO L85 PathProgramCache]: Analyzing trace with hash 899468739, now seen corresponding path program 6 times [2024-06-20 16:15:39,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:39,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079666419] [2024-06-20 16:15:39,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:39,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:41,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:41,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079666419] [2024-06-20 16:15:41,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079666419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:41,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:41,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:15:41,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393631183] [2024-06-20 16:15:41,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:41,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:15:41,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:41,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:15:41,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:15:41,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:15:41,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 701 transitions, 10411 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:41,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:41,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:15:41,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:43,618 INFO L124 PetriNetUnfolderBase]: 5120/7880 cut-off events. [2024-06-20 16:15:43,618 INFO L125 PetriNetUnfolderBase]: For 1275735/1275743 co-relation queries the response was YES. [2024-06-20 16:15:43,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82572 conditions, 7880 events. 5120/7880 cut-off events. For 1275735/1275743 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 45916 event pairs, 1259 based on Foata normal form. 8/7885 useless extension candidates. Maximal degree in co-relation 82423. Up to 6494 conditions per place. [2024-06-20 16:15:43,741 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 491 selfloop transitions, 259 changer transitions 0/757 dead transitions. [2024-06-20 16:15:43,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 757 transitions, 12712 flow [2024-06-20 16:15:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:15:43,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:15:43,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 264 transitions. [2024-06-20 16:15:43,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-20 16:15:43,743 INFO L175 Difference]: Start difference. First operand has 335 places, 701 transitions, 10411 flow. Second operand 13 states and 264 transitions. [2024-06-20 16:15:43,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 757 transitions, 12712 flow [2024-06-20 16:15:45,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 757 transitions, 12289 flow, removed 69 selfloop flow, removed 8 redundant places. [2024-06-20 16:15:45,671 INFO L231 Difference]: Finished difference. Result has 340 places, 704 transitions, 10639 flow [2024-06-20 16:15:45,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9988, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10639, PETRI_PLACES=340, PETRI_TRANSITIONS=704} [2024-06-20 16:15:45,671 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 295 predicate places. [2024-06-20 16:15:45,671 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 704 transitions, 10639 flow [2024-06-20 16:15:45,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:45,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:45,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:45,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 16:15:45,672 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:15:45,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:45,673 INFO L85 PathProgramCache]: Analyzing trace with hash 899468584, now seen corresponding path program 9 times [2024-06-20 16:15:45,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:45,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120453682] [2024-06-20 16:15:45,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:45,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:46,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:46,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120453682] [2024-06-20 16:15:46,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120453682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:46,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:46,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:15:46,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125508069] [2024-06-20 16:15:46,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:46,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:15:46,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:46,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:15:46,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:15:47,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:15:47,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 704 transitions, 10639 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:47,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:47,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:15:47,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:49,425 INFO L124 PetriNetUnfolderBase]: 5137/7913 cut-off events. [2024-06-20 16:15:49,425 INFO L125 PetriNetUnfolderBase]: For 1307461/1307469 co-relation queries the response was YES. [2024-06-20 16:15:49,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84151 conditions, 7913 events. 5137/7913 cut-off events. For 1307461/1307469 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 46080 event pairs, 1307 based on Foata normal form. 8/7913 useless extension candidates. Maximal degree in co-relation 84000. Up to 7063 conditions per place. [2024-06-20 16:15:49,533 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 561 selfloop transitions, 179 changer transitions 0/747 dead transitions. [2024-06-20 16:15:49,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 747 transitions, 12493 flow [2024-06-20 16:15:49,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:15:49,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:15:49,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-20 16:15:49,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412878787878788 [2024-06-20 16:15:49,535 INFO L175 Difference]: Start difference. First operand has 340 places, 704 transitions, 10639 flow. Second operand 12 states and 233 transitions. [2024-06-20 16:15:49,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 747 transitions, 12493 flow [2024-06-20 16:15:51,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 747 transitions, 11868 flow, removed 56 selfloop flow, removed 11 redundant places. [2024-06-20 16:15:51,505 INFO L231 Difference]: Finished difference. Result has 341 places, 706 transitions, 10475 flow [2024-06-20 16:15:51,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10014, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10475, PETRI_PLACES=341, PETRI_TRANSITIONS=706} [2024-06-20 16:15:51,505 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 296 predicate places. [2024-06-20 16:15:51,505 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 706 transitions, 10475 flow [2024-06-20 16:15:51,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:51,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:51,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:51,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 16:15:51,506 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:15:51,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:51,506 INFO L85 PathProgramCache]: Analyzing trace with hash 905182659, now seen corresponding path program 7 times [2024-06-20 16:15:51,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:51,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011796706] [2024-06-20 16:15:51,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:51,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:52,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:52,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011796706] [2024-06-20 16:15:52,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011796706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:52,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:52,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:15:52,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327472800] [2024-06-20 16:15:52,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:52,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:15:52,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:52,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:15:52,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:15:52,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:15:52,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 706 transitions, 10475 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:52,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:52,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:15:52,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:55,091 INFO L124 PetriNetUnfolderBase]: 5127/7894 cut-off events. [2024-06-20 16:15:55,091 INFO L125 PetriNetUnfolderBase]: For 1323553/1323561 co-relation queries the response was YES. [2024-06-20 16:15:55,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83536 conditions, 7894 events. 5127/7894 cut-off events. For 1323553/1323561 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 46008 event pairs, 1264 based on Foata normal form. 8/7899 useless extension candidates. Maximal degree in co-relation 83384. Up to 6628 conditions per place. [2024-06-20 16:15:55,209 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 486 selfloop transitions, 254 changer transitions 0/747 dead transitions. [2024-06-20 16:15:55,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 747 transitions, 12256 flow [2024-06-20 16:15:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:15:55,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:15:55,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-20 16:15:55,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45867768595041325 [2024-06-20 16:15:55,210 INFO L175 Difference]: Start difference. First operand has 341 places, 706 transitions, 10475 flow. Second operand 11 states and 222 transitions. [2024-06-20 16:15:55,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 747 transitions, 12256 flow [2024-06-20 16:15:57,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 747 transitions, 11753 flow, removed 74 selfloop flow, removed 10 redundant places. [2024-06-20 16:15:57,154 INFO L231 Difference]: Finished difference. Result has 342 places, 706 transitions, 10488 flow [2024-06-20 16:15:57,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9972, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10488, PETRI_PLACES=342, PETRI_TRANSITIONS=706} [2024-06-20 16:15:57,155 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 297 predicate places. [2024-06-20 16:15:57,155 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 706 transitions, 10488 flow [2024-06-20 16:15:57,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:57,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:57,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:57,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 16:15:57,155 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:15:57,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:57,156 INFO L85 PathProgramCache]: Analyzing trace with hash 899464864, now seen corresponding path program 10 times [2024-06-20 16:15:57,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:57,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099632601] [2024-06-20 16:15:57,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:57,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:58,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:58,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099632601] [2024-06-20 16:15:58,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099632601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:58,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:58,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:15:58,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643662933] [2024-06-20 16:15:58,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:58,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:15:58,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:58,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:15:58,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:15:58,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:15:58,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 706 transitions, 10488 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:58,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:58,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:15:58,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:16:00,634 INFO L124 PetriNetUnfolderBase]: 5119/7877 cut-off events. [2024-06-20 16:16:00,634 INFO L125 PetriNetUnfolderBase]: For 1342159/1342167 co-relation queries the response was YES. [2024-06-20 16:16:00,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83653 conditions, 7877 events. 5119/7877 cut-off events. For 1342159/1342167 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 45791 event pairs, 1352 based on Foata normal form. 8/7877 useless extension candidates. Maximal degree in co-relation 83500. Up to 6975 conditions per place. [2024-06-20 16:16:00,761 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 557 selfloop transitions, 182 changer transitions 0/746 dead transitions. [2024-06-20 16:16:00,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 746 transitions, 12314 flow [2024-06-20 16:16:00,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:16:00,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:16:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-20 16:16:00,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44834710743801653 [2024-06-20 16:16:00,762 INFO L175 Difference]: Start difference. First operand has 342 places, 706 transitions, 10488 flow. Second operand 11 states and 217 transitions. [2024-06-20 16:16:00,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 746 transitions, 12314 flow [2024-06-20 16:16:02,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 746 transitions, 11790 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 16:16:02,912 INFO L231 Difference]: Finished difference. Result has 343 places, 708 transitions, 10435 flow [2024-06-20 16:16:02,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9964, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10435, PETRI_PLACES=343, PETRI_TRANSITIONS=708} [2024-06-20 16:16:02,913 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-20 16:16:02,913 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 708 transitions, 10435 flow [2024-06-20 16:16:02,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:02,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:16:02,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:16:02,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 16:16:02,914 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:16:02,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:16:02,914 INFO L85 PathProgramCache]: Analyzing trace with hash 2059229950, now seen corresponding path program 1 times [2024-06-20 16:16:02,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:16:02,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097138711] [2024-06-20 16:16:02,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:16:02,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:16:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:16:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:16:03,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:16:03,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097138711] [2024-06-20 16:16:03,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097138711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:16:03,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:16:03,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:16:03,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96550995] [2024-06-20 16:16:03,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:16:03,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:16:03,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:16:03,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:16:03,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:16:03,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:16:03,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 708 transitions, 10435 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:03,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:16:03,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:16:03,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:16:05,786 INFO L124 PetriNetUnfolderBase]: 5277/8116 cut-off events. [2024-06-20 16:16:05,787 INFO L125 PetriNetUnfolderBase]: For 1406279/1406312 co-relation queries the response was YES. [2024-06-20 16:16:05,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85316 conditions, 8116 events. 5277/8116 cut-off events. For 1406279/1406312 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 47021 event pairs, 1575 based on Foata normal form. 16/8102 useless extension candidates. Maximal degree in co-relation 85162. Up to 7367 conditions per place. [2024-06-20 16:16:05,919 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 572 selfloop transitions, 50 changer transitions 0/733 dead transitions. [2024-06-20 16:16:05,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 733 transitions, 12009 flow [2024-06-20 16:16:05,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:16:05,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:16:05,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 16:16:05,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-20 16:16:05,920 INFO L175 Difference]: Start difference. First operand has 343 places, 708 transitions, 10435 flow. Second operand 8 states and 151 transitions. [2024-06-20 16:16:05,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 733 transitions, 12009 flow [2024-06-20 16:16:08,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 733 transitions, 11556 flow, removed 46 selfloop flow, removed 9 redundant places. [2024-06-20 16:16:08,048 INFO L231 Difference]: Finished difference. Result has 342 places, 714 transitions, 10166 flow [2024-06-20 16:16:08,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9982, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10166, PETRI_PLACES=342, PETRI_TRANSITIONS=714} [2024-06-20 16:16:08,048 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 297 predicate places. [2024-06-20 16:16:08,049 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 714 transitions, 10166 flow [2024-06-20 16:16:08,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:08,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:16:08,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:16:08,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 16:16:08,049 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:16:08,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:16:08,049 INFO L85 PathProgramCache]: Analyzing trace with hash -443737642, now seen corresponding path program 11 times [2024-06-20 16:16:08,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:16:08,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990986019] [2024-06-20 16:16:08,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:16:08,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:16:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:16:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:16:09,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:16:09,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990986019] [2024-06-20 16:16:09,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990986019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:16:09,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:16:09,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:16:09,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667883959] [2024-06-20 16:16:09,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:16:09,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:16:09,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:16:09,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:16:09,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:16:09,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:16:09,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 714 transitions, 10166 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:09,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:16:09,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:16:09,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:16:11,489 INFO L124 PetriNetUnfolderBase]: 5455/8387 cut-off events. [2024-06-20 16:16:11,490 INFO L125 PetriNetUnfolderBase]: For 1425657/1425657 co-relation queries the response was YES. [2024-06-20 16:16:11,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87901 conditions, 8387 events. 5455/8387 cut-off events. For 1425657/1425657 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 49424 event pairs, 1682 based on Foata normal form. 6/8386 useless extension candidates. Maximal degree in co-relation 87746. Up to 7333 conditions per place. [2024-06-20 16:16:11,621 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 679 selfloop transitions, 140 changer transitions 0/828 dead transitions. [2024-06-20 16:16:11,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 828 transitions, 13451 flow [2024-06-20 16:16:11,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:16:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:16:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 222 transitions. [2024-06-20 16:16:11,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-20 16:16:11,623 INFO L175 Difference]: Start difference. First operand has 342 places, 714 transitions, 10166 flow. Second operand 12 states and 222 transitions. [2024-06-20 16:16:11,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 828 transitions, 13451 flow [2024-06-20 16:16:14,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 828 transitions, 13377 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 16:16:14,101 INFO L231 Difference]: Finished difference. Result has 354 places, 775 transitions, 11617 flow [2024-06-20 16:16:14,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10092, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11617, PETRI_PLACES=354, PETRI_TRANSITIONS=775} [2024-06-20 16:16:14,101 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 309 predicate places. [2024-06-20 16:16:14,101 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 775 transitions, 11617 flow [2024-06-20 16:16:14,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:14,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:16:14,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:16:14,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 16:16:14,102 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:16:14,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:16:14,102 INFO L85 PathProgramCache]: Analyzing trace with hash -512413979, now seen corresponding path program 8 times [2024-06-20 16:16:14,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:16:14,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604868486] [2024-06-20 16:16:14,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:16:14,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:16:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:16:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:16:15,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:16:15,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604868486] [2024-06-20 16:16:15,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604868486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:16:15,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:16:15,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:16:15,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734246272] [2024-06-20 16:16:15,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:16:15,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:16:15,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:16:15,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:16:15,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:16:15,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:16:15,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 775 transitions, 11617 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:15,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:16:15,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:16:15,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:16:17,580 INFO L124 PetriNetUnfolderBase]: 5563/8583 cut-off events. [2024-06-20 16:16:17,581 INFO L125 PetriNetUnfolderBase]: For 1469143/1469145 co-relation queries the response was YES. [2024-06-20 16:16:17,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90734 conditions, 8583 events. 5563/8583 cut-off events. For 1469143/1469145 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 51061 event pairs, 1337 based on Foata normal form. 8/8584 useless extension candidates. Maximal degree in co-relation 90573. Up to 7358 conditions per place. [2024-06-20 16:16:17,730 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 603 selfloop transitions, 230 changer transitions 0/842 dead transitions. [2024-06-20 16:16:17,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 842 transitions, 14288 flow [2024-06-20 16:16:17,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:16:17,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:16:17,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-20 16:16:17,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524793388429752 [2024-06-20 16:16:17,731 INFO L175 Difference]: Start difference. First operand has 354 places, 775 transitions, 11617 flow. Second operand 11 states and 219 transitions. [2024-06-20 16:16:17,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 842 transitions, 14288 flow [2024-06-20 16:16:20,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 842 transitions, 14041 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-20 16:16:20,171 INFO L231 Difference]: Finished difference. Result has 359 places, 793 transitions, 12160 flow [2024-06-20 16:16:20,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11370, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12160, PETRI_PLACES=359, PETRI_TRANSITIONS=793} [2024-06-20 16:16:20,172 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 314 predicate places. [2024-06-20 16:16:20,172 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 793 transitions, 12160 flow [2024-06-20 16:16:20,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:20,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:16:20,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:16:20,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 16:16:20,172 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:16:20,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:16:20,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1402639686, now seen corresponding path program 12 times [2024-06-20 16:16:20,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:16:20,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061259540] [2024-06-20 16:16:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:16:20,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:16:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:16:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:16:21,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:16:21,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061259540] [2024-06-20 16:16:21,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061259540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:16:21,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:16:21,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:16:21,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367371127] [2024-06-20 16:16:21,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:16:21,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:16:21,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:16:21,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:16:21,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:16:21,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:16:21,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 793 transitions, 12160 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:21,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:16:21,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:16:21,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:16:24,155 INFO L124 PetriNetUnfolderBase]: 5859/9037 cut-off events. [2024-06-20 16:16:24,156 INFO L125 PetriNetUnfolderBase]: For 1542073/1542075 co-relation queries the response was YES. [2024-06-20 16:16:24,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95338 conditions, 9037 events. 5859/9037 cut-off events. For 1542073/1542075 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 54449 event pairs, 1417 based on Foata normal form. 10/9034 useless extension candidates. Maximal degree in co-relation 95176. Up to 7740 conditions per place. [2024-06-20 16:16:24,290 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 639 selfloop transitions, 236 changer transitions 0/884 dead transitions. [2024-06-20 16:16:24,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 884 transitions, 15312 flow [2024-06-20 16:16:24,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:16:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:16:24,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-20 16:16:24,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4462809917355372 [2024-06-20 16:16:24,292 INFO L175 Difference]: Start difference. First operand has 359 places, 793 transitions, 12160 flow. Second operand 11 states and 216 transitions. [2024-06-20 16:16:24,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 884 transitions, 15312 flow [2024-06-20 16:16:26,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 884 transitions, 14774 flow, removed 104 selfloop flow, removed 8 redundant places. [2024-06-20 16:16:26,933 INFO L231 Difference]: Finished difference. Result has 363 places, 837 transitions, 13043 flow [2024-06-20 16:16:26,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11622, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13043, PETRI_PLACES=363, PETRI_TRANSITIONS=837} [2024-06-20 16:16:26,933 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 318 predicate places. [2024-06-20 16:16:26,933 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 837 transitions, 13043 flow [2024-06-20 16:16:26,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:26,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:16:26,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:16:26,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 16:16:26,934 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:16:26,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:16:26,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1402643406, now seen corresponding path program 13 times [2024-06-20 16:16:26,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:16:26,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082768196] [2024-06-20 16:16:26,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:16:26,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:16:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:16:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:16:28,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:16:28,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082768196] [2024-06-20 16:16:28,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082768196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:16:28,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:16:28,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:16:28,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755794095] [2024-06-20 16:16:28,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:16:28,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:16:28,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:16:28,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:16:28,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:16:28,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:16:28,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 837 transitions, 13043 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:28,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:16:28,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:16:28,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:16:30,888 INFO L124 PetriNetUnfolderBase]: 5841/9017 cut-off events. [2024-06-20 16:16:30,888 INFO L125 PetriNetUnfolderBase]: For 1547295/1547297 co-relation queries the response was YES. [2024-06-20 16:16:30,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95078 conditions, 9017 events. 5841/9017 cut-off events. For 1547295/1547297 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 54338 event pairs, 1488 based on Foata normal form. 10/9014 useless extension candidates. Maximal degree in co-relation 94914. Up to 8024 conditions per place. [2024-06-20 16:16:31,036 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 671 selfloop transitions, 200 changer transitions 0/880 dead transitions. [2024-06-20 16:16:31,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 880 transitions, 15085 flow [2024-06-20 16:16:31,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:16:31,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:16:31,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-20 16:16:31,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380165289256198 [2024-06-20 16:16:31,037 INFO L175 Difference]: Start difference. First operand has 363 places, 837 transitions, 13043 flow. Second operand 11 states and 212 transitions. [2024-06-20 16:16:31,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 880 transitions, 15085 flow [2024-06-20 16:16:33,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 880 transitions, 14619 flow, removed 127 selfloop flow, removed 7 redundant places. [2024-06-20 16:16:33,842 INFO L231 Difference]: Finished difference. Result has 367 places, 837 transitions, 13011 flow [2024-06-20 16:16:33,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12577, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13011, PETRI_PLACES=367, PETRI_TRANSITIONS=837} [2024-06-20 16:16:33,843 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 322 predicate places. [2024-06-20 16:16:33,843 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 837 transitions, 13011 flow [2024-06-20 16:16:33,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:33,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:16:33,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:16:33,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 16:16:33,843 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:16:33,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:16:33,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1489485101, now seen corresponding path program 9 times [2024-06-20 16:16:33,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:16:33,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771636947] [2024-06-20 16:16:33,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:16:33,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:16:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:16:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:16:35,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:16:35,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771636947] [2024-06-20 16:16:35,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771636947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:16:35,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:16:35,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:16:35,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535566430] [2024-06-20 16:16:35,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:16:35,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:16:35,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:16:35,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:16:35,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:16:35,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:16:35,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 837 transitions, 13011 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:35,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:16:35,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:16:35,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:16:37,666 INFO L124 PetriNetUnfolderBase]: 5933/9144 cut-off events. [2024-06-20 16:16:37,666 INFO L125 PetriNetUnfolderBase]: For 1570082/1570082 co-relation queries the response was YES. [2024-06-20 16:16:37,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96649 conditions, 9144 events. 5933/9144 cut-off events. For 1570082/1570082 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 55173 event pairs, 1951 based on Foata normal form. 6/9143 useless extension candidates. Maximal degree in co-relation 96483. Up to 8534 conditions per place. [2024-06-20 16:16:38,041 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 803 selfloop transitions, 76 changer transitions 0/888 dead transitions. [2024-06-20 16:16:38,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 888 transitions, 15271 flow [2024-06-20 16:16:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:16:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:16:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-20 16:16:38,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-20 16:16:38,043 INFO L175 Difference]: Start difference. First operand has 367 places, 837 transitions, 13011 flow. Second operand 11 states and 198 transitions. [2024-06-20 16:16:38,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 888 transitions, 15271 flow [2024-06-20 16:16:40,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 888 transitions, 14837 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 16:16:40,337 INFO L231 Difference]: Finished difference. Result has 369 places, 857 transitions, 13156 flow [2024-06-20 16:16:40,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12577, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=761, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13156, PETRI_PLACES=369, PETRI_TRANSITIONS=857} [2024-06-20 16:16:40,338 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 324 predicate places. [2024-06-20 16:16:40,338 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 857 transitions, 13156 flow [2024-06-20 16:16:40,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:40,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:16:40,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:16:40,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 16:16:40,338 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:16:40,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:16:40,339 INFO L85 PathProgramCache]: Analyzing trace with hash -508694909, now seen corresponding path program 10 times [2024-06-20 16:16:40,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:16:40,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589143052] [2024-06-20 16:16:40,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:16:40,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:16:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:16:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:16:41,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:16:41,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589143052] [2024-06-20 16:16:41,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589143052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:16:41,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:16:41,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:16:41,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081502297] [2024-06-20 16:16:41,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:16:41,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:16:41,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:16:41,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:16:41,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:16:41,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:16:41,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 857 transitions, 13156 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:41,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:16:41,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:16:41,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:16:44,420 INFO L124 PetriNetUnfolderBase]: 6109/9418 cut-off events. [2024-06-20 16:16:44,421 INFO L125 PetriNetUnfolderBase]: For 1607348/1607350 co-relation queries the response was YES. [2024-06-20 16:16:44,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98981 conditions, 9418 events. 6109/9418 cut-off events. For 1607348/1607350 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 57139 event pairs, 1550 based on Foata normal form. 8/9419 useless extension candidates. Maximal degree in co-relation 98813. Up to 8449 conditions per place. [2024-06-20 16:16:44,572 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 756 selfloop transitions, 177 changer transitions 0/942 dead transitions. [2024-06-20 16:16:44,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 942 transitions, 16104 flow [2024-06-20 16:16:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:16:44,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:16:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-20 16:16:44,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4297520661157025 [2024-06-20 16:16:44,573 INFO L175 Difference]: Start difference. First operand has 369 places, 857 transitions, 13156 flow. Second operand 11 states and 208 transitions. [2024-06-20 16:16:44,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 942 transitions, 16104 flow [2024-06-20 16:16:47,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 942 transitions, 15814 flow, removed 56 selfloop flow, removed 9 redundant places. [2024-06-20 16:16:47,967 INFO L231 Difference]: Finished difference. Result has 372 places, 899 transitions, 14125 flow [2024-06-20 16:16:47,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12866, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=680, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14125, PETRI_PLACES=372, PETRI_TRANSITIONS=899} [2024-06-20 16:16:47,967 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 327 predicate places. [2024-06-20 16:16:47,968 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 899 transitions, 14125 flow [2024-06-20 16:16:47,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:47,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:16:47,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:16:47,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 16:16:47,968 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:16:47,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:16:47,968 INFO L85 PathProgramCache]: Analyzing trace with hash -355024012, now seen corresponding path program 14 times [2024-06-20 16:16:47,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:16:47,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826237898] [2024-06-20 16:16:47,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:16:47,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:16:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:16:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:16:49,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:16:49,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826237898] [2024-06-20 16:16:49,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826237898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:16:49,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:16:49,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:16:49,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977866770] [2024-06-20 16:16:49,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:16:49,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:16:49,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:16:49,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:16:49,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:16:49,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:16:49,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 899 transitions, 14125 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:49,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:16:49,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:16:49,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:16:52,192 INFO L124 PetriNetUnfolderBase]: 6248/9633 cut-off events. [2024-06-20 16:16:52,192 INFO L125 PetriNetUnfolderBase]: For 1652646/1652648 co-relation queries the response was YES. [2024-06-20 16:16:52,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101540 conditions, 9633 events. 6248/9633 cut-off events. For 1652646/1652648 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 58794 event pairs, 1633 based on Foata normal form. 10/9631 useless extension candidates. Maximal degree in co-relation 101370. Up to 8859 conditions per place. [2024-06-20 16:16:52,356 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 819 selfloop transitions, 129 changer transitions 0/957 dead transitions. [2024-06-20 16:16:52,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 957 transitions, 16702 flow [2024-06-20 16:16:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:16:52,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:16:52,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 16:16:52,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954545454545456 [2024-06-20 16:16:52,357 INFO L175 Difference]: Start difference. First operand has 372 places, 899 transitions, 14125 flow. Second operand 10 states and 189 transitions. [2024-06-20 16:16:52,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 957 transitions, 16702 flow [2024-06-20 16:16:56,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 957 transitions, 16297 flow, removed 69 selfloop flow, removed 8 redundant places. [2024-06-20 16:16:56,303 INFO L231 Difference]: Finished difference. Result has 374 places, 921 transitions, 14490 flow [2024-06-20 16:16:56,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13720, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=770, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14490, PETRI_PLACES=374, PETRI_TRANSITIONS=921} [2024-06-20 16:16:56,304 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 329 predicate places. [2024-06-20 16:16:56,304 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 921 transitions, 14490 flow [2024-06-20 16:16:56,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:56,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:16:56,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:16:56,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 16:16:56,304 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:16:56,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:16:56,305 INFO L85 PathProgramCache]: Analyzing trace with hash -355171882, now seen corresponding path program 15 times [2024-06-20 16:16:56,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:16:56,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807972914] [2024-06-20 16:16:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:16:56,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:16:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:16:57,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:16:57,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:16:57,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807972914] [2024-06-20 16:16:57,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807972914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:16:57,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:16:57,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:16:57,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812454042] [2024-06-20 16:16:57,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:16:57,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:16:57,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:16:57,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:16:57,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:16:57,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:16:57,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 921 transitions, 14490 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:57,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:16:57,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:16:57,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:17:00,820 INFO L124 PetriNetUnfolderBase]: 6287/9692 cut-off events. [2024-06-20 16:17:00,820 INFO L125 PetriNetUnfolderBase]: For 1654050/1654052 co-relation queries the response was YES. [2024-06-20 16:17:00,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102027 conditions, 9692 events. 6287/9692 cut-off events. For 1654050/1654052 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 59164 event pairs, 1512 based on Foata normal form. 10/9688 useless extension candidates. Maximal degree in co-relation 101856. Up to 8381 conditions per place. [2024-06-20 16:17:00,988 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 734 selfloop transitions, 225 changer transitions 0/968 dead transitions. [2024-06-20 16:17:00,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 968 transitions, 17230 flow [2024-06-20 16:17:00,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:17:00,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:17:00,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-20 16:17:00,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-20 16:17:00,990 INFO L175 Difference]: Start difference. First operand has 374 places, 921 transitions, 14490 flow. Second operand 10 states and 194 transitions. [2024-06-20 16:17:00,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 968 transitions, 17230 flow [2024-06-20 16:17:04,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 968 transitions, 16828 flow, removed 87 selfloop flow, removed 8 redundant places. [2024-06-20 16:17:04,153 INFO L231 Difference]: Finished difference. Result has 376 places, 927 transitions, 14795 flow [2024-06-20 16:17:04,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14088, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=921, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=702, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14795, PETRI_PLACES=376, PETRI_TRANSITIONS=927} [2024-06-20 16:17:04,154 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 331 predicate places. [2024-06-20 16:17:04,154 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 927 transitions, 14795 flow [2024-06-20 16:17:04,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:04,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:17:04,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:17:04,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 16:17:04,155 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:17:04,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:17:04,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1489335216, now seen corresponding path program 16 times [2024-06-20 16:17:04,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:17:04,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368135321] [2024-06-20 16:17:04,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:17:04,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:17:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:17:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:17:05,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:17:05,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368135321] [2024-06-20 16:17:05,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368135321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:17:05,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:17:05,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:17:05,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481012015] [2024-06-20 16:17:05,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:17:05,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:17:05,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:17:05,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:17:05,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:17:05,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:17:05,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 927 transitions, 14795 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:05,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:17:05,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:17:05,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:17:08,773 INFO L124 PetriNetUnfolderBase]: 6269/9695 cut-off events. [2024-06-20 16:17:08,774 INFO L125 PetriNetUnfolderBase]: For 1658653/1658653 co-relation queries the response was YES. [2024-06-20 16:17:08,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101667 conditions, 9695 events. 6269/9695 cut-off events. For 1658653/1658653 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 59562 event pairs, 2027 based on Foata normal form. 8/9694 useless extension candidates. Maximal degree in co-relation 101495. Up to 9028 conditions per place. [2024-06-20 16:17:08,929 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 863 selfloop transitions, 88 changer transitions 0/960 dead transitions. [2024-06-20 16:17:08,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 960 transitions, 16885 flow [2024-06-20 16:17:08,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:17:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:17:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-20 16:17:08,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-20 16:17:08,931 INFO L175 Difference]: Start difference. First operand has 376 places, 927 transitions, 14795 flow. Second operand 11 states and 198 transitions. [2024-06-20 16:17:08,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 960 transitions, 16885 flow [2024-06-20 16:17:12,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 960 transitions, 15947 flow, removed 177 selfloop flow, removed 9 redundant places. [2024-06-20 16:17:12,190 INFO L231 Difference]: Finished difference. Result has 379 places, 929 transitions, 14117 flow [2024-06-20 16:17:12,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13857, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=927, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=839, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14117, PETRI_PLACES=379, PETRI_TRANSITIONS=929} [2024-06-20 16:17:12,191 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 334 predicate places. [2024-06-20 16:17:12,191 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 929 transitions, 14117 flow [2024-06-20 16:17:12,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:12,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:17:12,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:17:12,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 16:17:12,192 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:17:12,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:17:12,192 INFO L85 PathProgramCache]: Analyzing trace with hash -355168007, now seen corresponding path program 11 times [2024-06-20 16:17:12,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:17:12,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499144765] [2024-06-20 16:17:12,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:17:12,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:17:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:17:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:17:13,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:17:13,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499144765] [2024-06-20 16:17:13,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499144765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:17:13,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:17:13,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:17:13,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551993365] [2024-06-20 16:17:13,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:17:13,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:17:13,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:17:13,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:17:13,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:17:14,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:17:14,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 929 transitions, 14117 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:14,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:17:14,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:17:14,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:17:17,288 INFO L124 PetriNetUnfolderBase]: 6253/9678 cut-off events. [2024-06-20 16:17:17,288 INFO L125 PetriNetUnfolderBase]: For 1651789/1651791 co-relation queries the response was YES. [2024-06-20 16:17:17,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99169 conditions, 9678 events. 6253/9678 cut-off events. For 1651789/1651791 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 59417 event pairs, 1542 based on Foata normal form. 8/9679 useless extension candidates. Maximal degree in co-relation 98997. Up to 8485 conditions per place. [2024-06-20 16:17:17,445 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 744 selfloop transitions, 219 changer transitions 0/972 dead transitions. [2024-06-20 16:17:17,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 972 transitions, 16427 flow [2024-06-20 16:17:17,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:17:17,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:17:17,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-20 16:17:17,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-20 16:17:17,447 INFO L175 Difference]: Start difference. First operand has 379 places, 929 transitions, 14117 flow. Second operand 10 states and 196 transitions. [2024-06-20 16:17:17,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 972 transitions, 16427 flow [2024-06-20 16:17:20,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 972 transitions, 16112 flow, removed 104 selfloop flow, removed 6 redundant places. [2024-06-20 16:17:20,327 INFO L231 Difference]: Finished difference. Result has 383 places, 929 transitions, 14270 flow [2024-06-20 16:17:20,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13802, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14270, PETRI_PLACES=383, PETRI_TRANSITIONS=929} [2024-06-20 16:17:20,328 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 338 predicate places. [2024-06-20 16:17:20,328 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 929 transitions, 14270 flow [2024-06-20 16:17:20,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:20,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:17:20,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:17:20,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 16:17:20,328 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:17:20,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:17:20,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1332972713, now seen corresponding path program 12 times [2024-06-20 16:17:20,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:17:20,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245625213] [2024-06-20 16:17:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:17:20,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:17:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:17:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:17:21,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:17:21,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245625213] [2024-06-20 16:17:21,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245625213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:17:21,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:17:21,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:17:21,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510426837] [2024-06-20 16:17:21,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:17:21,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:17:21,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:17:21,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:17:21,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:17:21,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:17:21,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 929 transitions, 14270 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:21,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:17:21,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:17:21,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:17:24,743 INFO L124 PetriNetUnfolderBase]: 6267/9682 cut-off events. [2024-06-20 16:17:24,743 INFO L125 PetriNetUnfolderBase]: For 1665446/1665452 co-relation queries the response was YES. [2024-06-20 16:17:24,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99704 conditions, 9682 events. 6267/9682 cut-off events. For 1665446/1665452 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 59356 event pairs, 1467 based on Foata normal form. 6/9685 useless extension candidates. Maximal degree in co-relation 99531. Up to 8148 conditions per place. [2024-06-20 16:17:24,890 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 662 selfloop transitions, 308 changer transitions 0/979 dead transitions. [2024-06-20 16:17:24,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 979 transitions, 16801 flow [2024-06-20 16:17:24,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:17:24,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:17:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-20 16:17:24,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-20 16:17:24,892 INFO L175 Difference]: Start difference. First operand has 383 places, 929 transitions, 14270 flow. Second operand 10 states and 200 transitions. [2024-06-20 16:17:24,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 979 transitions, 16801 flow [2024-06-20 16:17:27,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 979 transitions, 16076 flow, removed 48 selfloop flow, removed 10 redundant places. [2024-06-20 16:17:27,529 INFO L231 Difference]: Finished difference. Result has 383 places, 932 transitions, 14309 flow [2024-06-20 16:17:27,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13545, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14309, PETRI_PLACES=383, PETRI_TRANSITIONS=932} [2024-06-20 16:17:27,529 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 338 predicate places. [2024-06-20 16:17:27,530 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 932 transitions, 14309 flow [2024-06-20 16:17:27,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:27,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:17:27,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:17:27,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 16:17:27,530 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:17:27,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:17:27,531 INFO L85 PathProgramCache]: Analyzing trace with hash 773900875, now seen corresponding path program 13 times [2024-06-20 16:17:27,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:17:27,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849031421] [2024-06-20 16:17:27,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:17:27,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:17:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:17:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:17:28,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:17:28,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849031421] [2024-06-20 16:17:28,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849031421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:17:28,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:17:28,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:17:28,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509096614] [2024-06-20 16:17:28,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:17:28,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:17:28,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:17:28,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:17:28,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:17:28,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:17:28,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 932 transitions, 14309 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:28,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:17:28,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:17:28,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:17:31,636 INFO L124 PetriNetUnfolderBase]: 6317/9762 cut-off events. [2024-06-20 16:17:31,637 INFO L125 PetriNetUnfolderBase]: For 1720405/1720411 co-relation queries the response was YES. [2024-06-20 16:17:31,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101815 conditions, 9762 events. 6317/9762 cut-off events. For 1720405/1720411 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 60062 event pairs, 1443 based on Foata normal form. 6/9765 useless extension candidates. Maximal degree in co-relation 101642. Up to 8066 conditions per place. [2024-06-20 16:17:31,790 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 668 selfloop transitions, 318 changer transitions 0/995 dead transitions. [2024-06-20 16:17:31,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 995 transitions, 17887 flow [2024-06-20 16:17:31,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:17:31,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:17:31,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-20 16:17:31,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-20 16:17:31,792 INFO L175 Difference]: Start difference. First operand has 383 places, 932 transitions, 14309 flow. Second operand 10 states and 208 transitions. [2024-06-20 16:17:31,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 995 transitions, 17887 flow [2024-06-20 16:17:34,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 995 transitions, 17149 flow, removed 64 selfloop flow, removed 9 redundant places. [2024-06-20 16:17:34,590 INFO L231 Difference]: Finished difference. Result has 385 places, 941 transitions, 14740 flow [2024-06-20 16:17:34,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13579, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14740, PETRI_PLACES=385, PETRI_TRANSITIONS=941} [2024-06-20 16:17:34,591 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 340 predicate places. [2024-06-20 16:17:34,591 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 941 transitions, 14740 flow [2024-06-20 16:17:34,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:34,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:17:34,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:17:34,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 16:17:34,592 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:17:34,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:17:34,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1076109188, now seen corresponding path program 17 times [2024-06-20 16:17:34,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:17:34,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13407729] [2024-06-20 16:17:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:17:34,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:17:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:17:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:17:35,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:17:35,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13407729] [2024-06-20 16:17:35,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13407729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:17:35,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:17:35,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:17:35,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114753948] [2024-06-20 16:17:35,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:17:35,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:17:35,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:17:35,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:17:35,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:17:36,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:17:36,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 941 transitions, 14740 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:36,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:17:36,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:17:36,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:17:38,999 INFO L124 PetriNetUnfolderBase]: 6334/9780 cut-off events. [2024-06-20 16:17:38,999 INFO L125 PetriNetUnfolderBase]: For 1727782/1727788 co-relation queries the response was YES. [2024-06-20 16:17:39,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102937 conditions, 9780 events. 6334/9780 cut-off events. For 1727782/1727788 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 59923 event pairs, 1504 based on Foata normal form. 6/9778 useless extension candidates. Maximal degree in co-relation 102763. Up to 8802 conditions per place. [2024-06-20 16:17:39,165 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 788 selfloop transitions, 188 changer transitions 0/985 dead transitions. [2024-06-20 16:17:39,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 985 transitions, 17170 flow [2024-06-20 16:17:39,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:17:39,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:17:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-20 16:17:39,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380165289256198 [2024-06-20 16:17:39,167 INFO L175 Difference]: Start difference. First operand has 385 places, 941 transitions, 14740 flow. Second operand 11 states and 212 transitions. [2024-06-20 16:17:39,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 985 transitions, 17170 flow [2024-06-20 16:17:41,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 985 transitions, 16784 flow, removed 87 selfloop flow, removed 5 redundant places. [2024-06-20 16:17:42,006 INFO L231 Difference]: Finished difference. Result has 391 places, 943 transitions, 14848 flow [2024-06-20 16:17:42,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14356, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=941, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14848, PETRI_PLACES=391, PETRI_TRANSITIONS=943} [2024-06-20 16:17:42,007 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 346 predicate places. [2024-06-20 16:17:42,007 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 943 transitions, 14848 flow [2024-06-20 16:17:42,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:42,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:17:42,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:17:42,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 16:17:42,007 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:17:42,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:17:42,008 INFO L85 PathProgramCache]: Analyzing trace with hash 768538495, now seen corresponding path program 14 times [2024-06-20 16:17:42,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:17:42,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520223238] [2024-06-20 16:17:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:17:42,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:17:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:17:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:17:43,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:17:43,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520223238] [2024-06-20 16:17:43,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520223238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:17:43,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:17:43,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:17:43,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676485851] [2024-06-20 16:17:43,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:17:43,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:17:43,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:17:43,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:17:43,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:17:43,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:17:43,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 943 transitions, 14848 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:43,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:17:43,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:17:43,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:17:46,620 INFO L124 PetriNetUnfolderBase]: 6454/9965 cut-off events. [2024-06-20 16:17:46,621 INFO L125 PetriNetUnfolderBase]: For 1778205/1778211 co-relation queries the response was YES. [2024-06-20 16:17:46,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105084 conditions, 9965 events. 6454/9965 cut-off events. For 1778205/1778211 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 61494 event pairs, 1445 based on Foata normal form. 6/9968 useless extension candidates. Maximal degree in co-relation 104908. Up to 8324 conditions per place. [2024-06-20 16:17:46,776 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 706 selfloop transitions, 301 changer transitions 0/1016 dead transitions. [2024-06-20 16:17:46,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 1016 transitions, 18456 flow [2024-06-20 16:17:46,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:17:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:17:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-20 16:17:46,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-20 16:17:46,778 INFO L175 Difference]: Start difference. First operand has 391 places, 943 transitions, 14848 flow. Second operand 10 states and 211 transitions. [2024-06-20 16:17:46,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 1016 transitions, 18456 flow [2024-06-20 16:17:50,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 1016 transitions, 17982 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-06-20 16:17:50,466 INFO L231 Difference]: Finished difference. Result has 393 places, 961 transitions, 15388 flow [2024-06-20 16:17:50,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14384, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15388, PETRI_PLACES=393, PETRI_TRANSITIONS=961} [2024-06-20 16:17:50,466 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 348 predicate places. [2024-06-20 16:17:50,466 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 961 transitions, 15388 flow [2024-06-20 16:17:50,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:50,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:17:50,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:17:50,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 16:17:50,467 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:17:50,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:17:50,467 INFO L85 PathProgramCache]: Analyzing trace with hash 773900720, now seen corresponding path program 18 times [2024-06-20 16:17:50,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:17:50,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442820596] [2024-06-20 16:17:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:17:50,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:17:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:17:51,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:17:51,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:17:51,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442820596] [2024-06-20 16:17:51,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442820596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:17:51,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:17:51,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:17:51,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972887125] [2024-06-20 16:17:51,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:17:51,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:17:51,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:17:51,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:17:51,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:17:51,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:17:51,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 961 transitions, 15388 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:51,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:17:51,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:17:51,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:17:55,033 INFO L124 PetriNetUnfolderBase]: 6471/10001 cut-off events. [2024-06-20 16:17:55,034 INFO L125 PetriNetUnfolderBase]: For 1821800/1821806 co-relation queries the response was YES. [2024-06-20 16:17:55,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106640 conditions, 10001 events. 6471/10001 cut-off events. For 1821800/1821806 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 61698 event pairs, 1506 based on Foata normal form. 6/9999 useless extension candidates. Maximal degree in co-relation 106462. Up to 9058 conditions per place. [2024-06-20 16:17:55,207 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 808 selfloop transitions, 184 changer transitions 0/1001 dead transitions. [2024-06-20 16:17:55,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 1001 transitions, 17822 flow [2024-06-20 16:17:55,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:17:55,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:17:55,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-20 16:17:55,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-20 16:17:55,208 INFO L175 Difference]: Start difference. First operand has 393 places, 961 transitions, 15388 flow. Second operand 10 states and 193 transitions. [2024-06-20 16:17:55,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 1001 transitions, 17822 flow [2024-06-20 16:17:58,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 1001 transitions, 17338 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-20 16:17:58,971 INFO L231 Difference]: Finished difference. Result has 397 places, 963 transitions, 15395 flow [2024-06-20 16:17:58,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14904, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=961, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=777, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15395, PETRI_PLACES=397, PETRI_TRANSITIONS=963} [2024-06-20 16:17:58,971 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 352 predicate places. [2024-06-20 16:17:58,971 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 963 transitions, 15395 flow [2024-06-20 16:17:58,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:58,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:17:58,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:17:58,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 16:17:58,972 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:17:58,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:17:58,972 INFO L85 PathProgramCache]: Analyzing trace with hash 773906455, now seen corresponding path program 15 times [2024-06-20 16:17:58,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:17:58,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024433715] [2024-06-20 16:17:58,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:17:58,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:17:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:00,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:00,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024433715] [2024-06-20 16:18:00,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024433715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:00,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:00,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:18:00,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605570355] [2024-06-20 16:18:00,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:00,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:18:00,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:00,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:18:00,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:18:00,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:18:00,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 963 transitions, 15395 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:00,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:00,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:18:00,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:03,506 INFO L124 PetriNetUnfolderBase]: 6461/9986 cut-off events. [2024-06-20 16:18:03,507 INFO L125 PetriNetUnfolderBase]: For 1833312/1833318 co-relation queries the response was YES. [2024-06-20 16:18:03,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106634 conditions, 9986 events. 6461/9986 cut-off events. For 1833312/1833318 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 61733 event pairs, 1446 based on Foata normal form. 6/9989 useless extension candidates. Maximal degree in co-relation 106454. Up to 8436 conditions per place. [2024-06-20 16:18:03,666 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 709 selfloop transitions, 296 changer transitions 0/1014 dead transitions. [2024-06-20 16:18:03,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 1014 transitions, 17934 flow [2024-06-20 16:18:03,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:18:03,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:18:03,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-20 16:18:03,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-20 16:18:03,668 INFO L175 Difference]: Start difference. First operand has 397 places, 963 transitions, 15395 flow. Second operand 10 states and 202 transitions. [2024-06-20 16:18:03,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 1014 transitions, 17934 flow [2024-06-20 16:18:07,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 1014 transitions, 17409 flow, removed 82 selfloop flow, removed 8 redundant places. [2024-06-20 16:18:07,183 INFO L231 Difference]: Finished difference. Result has 399 places, 963 transitions, 15476 flow [2024-06-20 16:18:07,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14870, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=963, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15476, PETRI_PLACES=399, PETRI_TRANSITIONS=963} [2024-06-20 16:18:07,184 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 354 predicate places. [2024-06-20 16:18:07,184 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 963 transitions, 15476 flow [2024-06-20 16:18:07,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:07,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:07,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:07,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 16:18:07,185 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:18:07,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:07,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1338536903, now seen corresponding path program 16 times [2024-06-20 16:18:07,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:07,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669544131] [2024-06-20 16:18:07,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:07,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:08,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:08,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669544131] [2024-06-20 16:18:08,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669544131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:08,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:08,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:18:08,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029976894] [2024-06-20 16:18:08,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:08,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:18:08,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:08,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:18:08,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:18:08,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-20 16:18:08,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 963 transitions, 15476 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:08,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:08,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-20 16:18:08,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand