./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix018.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix018.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/mix018.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix018.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:05:12,145 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:05:12,205 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:05:12,209 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:05:12,209 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:05:12,237 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:05:12,238 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:05:12,238 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:05:12,239 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:05:12,242 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:05:12,242 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:05:12,242 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:05:12,243 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:05:12,244 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:05:12,244 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:05:12,244 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:05:12,244 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:05:12,245 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:05:12,245 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:05:12,245 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:05:12,245 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:05:12,245 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:05:12,246 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:05:12,246 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:05:12,246 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:05:12,246 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:05:12,246 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:05:12,246 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:05:12,247 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:05:12,247 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:05:12,248 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:05:12,248 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:05:12,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:05:12,248 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:05:12,248 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:05:12,249 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:05:12,249 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:05:12,249 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:05:12,249 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:05:12,249 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:05:12,249 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:05:12,250 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:05:12,250 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:05:12,250 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:05:12,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:05:12,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:05:12,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:05:12,554 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:05:12,555 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:05:12,556 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix018.opt.yml/witness.yml [2024-06-14 12:05:12,722 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:05:12,722 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:05:12,722 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix018.opt.i [2024-06-14 12:05:13,795 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:05:13,956 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:05:13,956 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix018.opt.i [2024-06-14 12:05:13,967 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1227f669/ef63c60e05404a3bb92bcadca624ec2e/FLAGfdbd47f1f [2024-06-14 12:05:13,976 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1227f669/ef63c60e05404a3bb92bcadca624ec2e [2024-06-14 12:05:13,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:05:13,977 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:05:13,978 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:05:13,978 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:05:13,982 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:05:13,982 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:05:12" (1/2) ... [2024-06-14 12:05:13,983 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@787e616e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:05:13, skipping insertion in model container [2024-06-14 12:05:13,983 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:05:12" (1/2) ... [2024-06-14 12:05:13,984 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4b9429da and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:05:13, skipping insertion in model container [2024-06-14 12:05:13,984 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:05:13" (2/2) ... [2024-06-14 12:05:13,984 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@787e616e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:05:13, skipping insertion in model container [2024-06-14 12:05:13,985 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:05:13" (2/2) ... [2024-06-14 12:05:13,985 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:05:14,082 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:05:14,083 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-14 12:05:14,083 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-14 12:05:14,084 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-14 12:05:14,084 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-14 12:05:14,084 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:05:14,085 INFO L106 edCorrectnessWitness]: ghost_update [L865-L865] multithreaded = 1; [2024-06-14 12:05:14,159 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:05:14,413 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:05:14,433 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:05:14,590 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:05:14,631 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:05:14,631 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:05:14 WrapperNode [2024-06-14 12:05:14,631 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:05:14,632 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:05:14,632 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:05:14,633 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:05:14,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:05:14" (1/1) ... [2024-06-14 12:05:14,655 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:05:14" (1/1) ... [2024-06-14 12:05:14,719 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 161 [2024-06-14 12:05:14,719 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:05:14,720 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:05:14,720 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:05:14,721 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:05:14,736 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:05:14" (1/1) ... [2024-06-14 12:05:14,736 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:05:14" (1/1) ... [2024-06-14 12:05:14,739 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:05:14" (1/1) ... [2024-06-14 12:05:14,752 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]. [2024-06-14 12:05:14,753 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:05:14" (1/1) ... [2024-06-14 12:05:14,753 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:05:14" (1/1) ... [2024-06-14 12:05:14,763 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:05:14" (1/1) ... [2024-06-14 12:05:14,764 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:05:14" (1/1) ... [2024-06-14 12:05:14,766 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:05:14" (1/1) ... [2024-06-14 12:05:14,767 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:05:14" (1/1) ... [2024-06-14 12:05:14,770 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:05:14,770 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:05:14,770 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:05:14,771 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:05:14,771 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:05:14" (1/1) ... [2024-06-14 12:05:14,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:05:14,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:05:14,792 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) [2024-06-14 12:05:14,809 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 [2024-06-14 12:05:14,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:05:14,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:05:14,837 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:05:14,837 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:05:14,838 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:05:14,838 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:05:14,838 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:05:14,838 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:05:14,838 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 12:05:14,838 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 12:05:14,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:05:14,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:05:14,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:05:14,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:05:14,841 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:05:14,991 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:05:14,993 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:05:15,330 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:05:15,330 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:05:15,438 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:05:15,438 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:05:15,439 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:05:15 BoogieIcfgContainer [2024-06-14 12:05:15,439 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:05:15,440 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:05:15,440 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:05:15,443 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:05:15,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:05:12" (1/4) ... [2024-06-14 12:05:15,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd37bb6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:05:15, skipping insertion in model container [2024-06-14 12:05:15,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:05:13" (2/4) ... [2024-06-14 12:05:15,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd37bb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:05:15, skipping insertion in model container [2024-06-14 12:05:15,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:05:14" (3/4) ... [2024-06-14 12:05:15,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd37bb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:05:15, skipping insertion in model container [2024-06-14 12:05:15,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:05:15" (4/4) ... [2024-06-14 12:05:15,445 INFO L112 eAbstractionObserver]: Analyzing ICFG mix018.opt.i [2024-06-14 12:05:15,457 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:05:15,458 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 12:05:15,458 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:05:15,495 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:05:15,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 12:05:15,582 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-14 12:05:15,582 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:05:15,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:05:15,585 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 12:05:15,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-14 12:05:15,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:05:15,598 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;@4fe6c450, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:05:15,598 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 12:05:15,601 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:05:15,601 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:05:15,601 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:05:15,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:15,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:05:15,602 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:15,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:15,606 INFO L85 PathProgramCache]: Analyzing trace with hash -13335953, now seen corresponding path program 1 times [2024-06-14 12:05:15,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:15,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948336555] [2024-06-14 12:05:15,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:15,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:16,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:16,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948336555] [2024-06-14 12:05:16,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948336555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:16,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:16,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:05:16,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379271439] [2024-06-14 12:05:16,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:16,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:05:16,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:16,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:05:16,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:05:16,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-14 12:05:16,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:16,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:16,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-14 12:05:16,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:17,911 INFO L124 PetriNetUnfolderBase]: 6201/8839 cut-off events. [2024-06-14 12:05:17,911 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-06-14 12:05:17,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17597 conditions, 8839 events. 6201/8839 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 50262 event pairs, 4673 based on Foata normal form. 1/8554 useless extension candidates. Maximal degree in co-relation 17581. Up to 8487 conditions per place. [2024-06-14 12:05:18,008 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 43 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-14 12:05:18,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 231 flow [2024-06-14 12:05:18,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:05:18,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:05:18,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-06-14 12:05:18,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6289308176100629 [2024-06-14 12:05:18,020 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 100 transitions. [2024-06-14 12:05:18,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 231 flow [2024-06-14 12:05:18,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 224 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:05:18,028 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-14 12:05:18,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-14 12:05:18,032 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-14 12:05:18,032 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-14 12:05:18,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:18,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:18,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:18,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:05:18,033 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:18,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:18,034 INFO L85 PathProgramCache]: Analyzing trace with hash 69080206, now seen corresponding path program 1 times [2024-06-14 12:05:18,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:18,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561468925] [2024-06-14 12:05:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:18,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:18,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:18,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561468925] [2024-06-14 12:05:18,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561468925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:18,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:18,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:05:18,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788356676] [2024-06-14 12:05:18,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:18,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:05:18,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:18,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:05:18,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:05:18,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-14 12:05:18,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:18,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:18,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-14 12:05:18,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:19,930 INFO L124 PetriNetUnfolderBase]: 7096/9886 cut-off events. [2024-06-14 12:05:19,930 INFO L125 PetriNetUnfolderBase]: For 2057/2057 co-relation queries the response was YES. [2024-06-14 12:05:19,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22626 conditions, 9886 events. 7096/9886 cut-off events. For 2057/2057 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 54603 event pairs, 4749 based on Foata normal form. 4/9852 useless extension candidates. Maximal degree in co-relation 22611. Up to 9657 conditions per place. [2024-06-14 12:05:19,987 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 54 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-14 12:05:19,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 325 flow [2024-06-14 12:05:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:05:19,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:05:19,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-14 12:05:19,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990566037735849 [2024-06-14 12:05:19,993 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 127 transitions. [2024-06-14 12:05:19,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 325 flow [2024-06-14 12:05:19,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:05:19,998 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-14 12:05:19,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-14 12:05:19,999 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-14 12:05:20,000 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-14 12:05:20,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:20,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:20,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:20,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:05:20,003 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:20,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:20,016 INFO L85 PathProgramCache]: Analyzing trace with hash 2141487358, now seen corresponding path program 1 times [2024-06-14 12:05:20,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:20,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787583373] [2024-06-14 12:05:20,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:20,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:20,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:20,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787583373] [2024-06-14 12:05:20,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787583373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:20,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:20,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:05:20,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560096076] [2024-06-14 12:05:20,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:20,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:05:20,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:20,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:05:20,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:05:20,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-14 12:05:20,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 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) [2024-06-14 12:05:20,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:20,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-14 12:05:20,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:22,057 INFO L124 PetriNetUnfolderBase]: 7114/9928 cut-off events. [2024-06-14 12:05:22,072 INFO L125 PetriNetUnfolderBase]: For 5889/5889 co-relation queries the response was YES. [2024-06-14 12:05:22,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25476 conditions, 9928 events. 7114/9928 cut-off events. For 5889/5889 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 54885 event pairs, 3563 based on Foata normal form. 7/9910 useless extension candidates. Maximal degree in co-relation 25459. Up to 9578 conditions per place. [2024-06-14 12:05:22,160 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 72 selfloop transitions, 21 changer transitions 0/101 dead transitions. [2024-06-14 12:05:22,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 541 flow [2024-06-14 12:05:22,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:05:22,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:05:22,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-06-14 12:05:22,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6264150943396226 [2024-06-14 12:05:22,164 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 5 states and 166 transitions. [2024-06-14 12:05:22,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 541 flow [2024-06-14 12:05:22,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 522 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 12:05:22,169 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 312 flow [2024-06-14 12:05:22,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-14 12:05:22,170 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-14 12:05:22,170 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 312 flow [2024-06-14 12:05:22,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 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) [2024-06-14 12:05:22,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:22,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:22,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:05:22,171 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:22,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:22,184 INFO L85 PathProgramCache]: Analyzing trace with hash 680048381, now seen corresponding path program 1 times [2024-06-14 12:05:22,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:22,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280202009] [2024-06-14 12:05:22,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:22,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:22,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:22,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280202009] [2024-06-14 12:05:22,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280202009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:22,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:22,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:05:22,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032416753] [2024-06-14 12:05:22,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:22,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:05:22,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:22,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:05:22,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:05:23,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-14 12:05:23,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-14 12:05:23,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:23,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-14 12:05:23,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:24,196 INFO L124 PetriNetUnfolderBase]: 7256/10148 cut-off events. [2024-06-14 12:05:24,197 INFO L125 PetriNetUnfolderBase]: For 14372/14391 co-relation queries the response was YES. [2024-06-14 12:05:24,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30760 conditions, 10148 events. 7256/10148 cut-off events. For 14372/14391 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 56522 event pairs, 2792 based on Foata normal form. 48/10169 useless extension candidates. Maximal degree in co-relation 30740. Up to 9570 conditions per place. [2024-06-14 12:05:24,253 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 82 selfloop transitions, 24 changer transitions 0/114 dead transitions. [2024-06-14 12:05:24,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 114 transitions, 696 flow [2024-06-14 12:05:24,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:05:24,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:05:24,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-14 12:05:24,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.610062893081761 [2024-06-14 12:05:24,255 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 312 flow. Second operand 6 states and 194 transitions. [2024-06-14 12:05:24,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 114 transitions, 696 flow [2024-06-14 12:05:24,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 114 transitions, 684 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-14 12:05:24,263 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 381 flow [2024-06-14 12:05:24,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-14 12:05:24,263 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-06-14 12:05:24,264 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 381 flow [2024-06-14 12:05:24,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-14 12:05:24,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:24,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:24,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:05:24,265 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:24,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:24,265 INFO L85 PathProgramCache]: Analyzing trace with hash 279362288, now seen corresponding path program 1 times [2024-06-14 12:05:24,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:24,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504782299] [2024-06-14 12:05:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:24,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:25,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:25,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504782299] [2024-06-14 12:05:25,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504782299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:25,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:25,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:05:25,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320379995] [2024-06-14 12:05:25,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:25,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:05:25,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:25,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:05:25,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:05:25,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-14 12:05:25,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 381 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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) [2024-06-14 12:05:25,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:25,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-14 12:05:25,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:26,296 INFO L124 PetriNetUnfolderBase]: 6342/9103 cut-off events. [2024-06-14 12:05:26,296 INFO L125 PetriNetUnfolderBase]: For 17897/17919 co-relation queries the response was YES. [2024-06-14 12:05:26,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29613 conditions, 9103 events. 6342/9103 cut-off events. For 17897/17919 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 52078 event pairs, 2937 based on Foata normal form. 3/8967 useless extension candidates. Maximal degree in co-relation 29590. Up to 8693 conditions per place. [2024-06-14 12:05:26,372 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 65 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-06-14 12:05:26,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 575 flow [2024-06-14 12:05:26,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:05:26,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:05:26,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-14 12:05:26,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132075471698113 [2024-06-14 12:05:26,374 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 381 flow. Second operand 5 states and 136 transitions. [2024-06-14 12:05:26,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 575 flow [2024-06-14 12:05:26,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 514 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:05:26,382 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 351 flow [2024-06-14 12:05:26,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-06-14 12:05:26,384 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-14 12:05:26,384 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 351 flow [2024-06-14 12:05:26,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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) [2024-06-14 12:05:26,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:26,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:26,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:05:26,385 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:26,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:26,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1109658049, now seen corresponding path program 1 times [2024-06-14 12:05:26,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:26,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355147559] [2024-06-14 12:05:26,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:26,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:27,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:27,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355147559] [2024-06-14 12:05:27,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355147559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:27,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:27,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:05:27,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849655427] [2024-06-14 12:05:27,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:27,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:05:27,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:27,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:05:27,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:05:27,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:05:27,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 351 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:27,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:27,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:05:27,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:28,776 INFO L124 PetriNetUnfolderBase]: 7260/10150 cut-off events. [2024-06-14 12:05:28,776 INFO L125 PetriNetUnfolderBase]: For 24375/24395 co-relation queries the response was YES. [2024-06-14 12:05:28,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33606 conditions, 10150 events. 7260/10150 cut-off events. For 24375/24395 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 56474 event pairs, 3413 based on Foata normal form. 24/10153 useless extension candidates. Maximal degree in co-relation 33581. Up to 9800 conditions per place. [2024-06-14 12:05:28,833 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 68 selfloop transitions, 25 changer transitions 0/101 dead transitions. [2024-06-14 12:05:28,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 101 transitions, 674 flow [2024-06-14 12:05:28,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:05:28,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:05:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-14 12:05:28,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251572327044025 [2024-06-14 12:05:28,834 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 351 flow. Second operand 6 states and 167 transitions. [2024-06-14 12:05:28,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 101 transitions, 674 flow [2024-06-14 12:05:28,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 645 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 12:05:28,842 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 418 flow [2024-06-14 12:05:28,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-06-14 12:05:28,843 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-14 12:05:28,843 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 418 flow [2024-06-14 12:05:28,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:28,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:28,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:28,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:05:28,844 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:28,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:28,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2115756529, now seen corresponding path program 2 times [2024-06-14 12:05:28,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:28,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890004449] [2024-06-14 12:05:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:28,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:29,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:29,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890004449] [2024-06-14 12:05:29,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890004449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:29,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:29,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:05:29,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742906224] [2024-06-14 12:05:29,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:29,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:05:29,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:29,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:05:29,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:05:29,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:05:29,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:29,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:29,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:05:29,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:31,083 INFO L124 PetriNetUnfolderBase]: 7215/10077 cut-off events. [2024-06-14 12:05:31,083 INFO L125 PetriNetUnfolderBase]: For 28954/28980 co-relation queries the response was YES. [2024-06-14 12:05:31,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34292 conditions, 10077 events. 7215/10077 cut-off events. For 28954/28980 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 55874 event pairs, 3427 based on Foata normal form. 24/10075 useless extension candidates. Maximal degree in co-relation 34267. Up to 9731 conditions per place. [2024-06-14 12:05:31,157 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 61 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-06-14 12:05:31,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 95 transitions, 654 flow [2024-06-14 12:05:31,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:05:31,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:05:31,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-14 12:05:31,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-14 12:05:31,159 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 418 flow. Second operand 6 states and 162 transitions. [2024-06-14 12:05:31,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 95 transitions, 654 flow [2024-06-14 12:05:31,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 95 transitions, 611 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:05:31,169 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 438 flow [2024-06-14 12:05:31,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=438, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2024-06-14 12:05:31,169 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-14 12:05:31,169 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 438 flow [2024-06-14 12:05:31,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:31,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:31,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:31,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:05:31,170 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:31,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:31,171 INFO L85 PathProgramCache]: Analyzing trace with hash -2133392923, now seen corresponding path program 1 times [2024-06-14 12:05:31,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:31,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259846901] [2024-06-14 12:05:31,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:31,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:32,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:32,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259846901] [2024-06-14 12:05:32,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259846901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:32,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:32,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:05:32,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592456146] [2024-06-14 12:05:32,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:32,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:05:32,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:32,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:05:32,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:05:32,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:05:32,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 438 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-14 12:05:32,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:32,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:05:32,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:33,760 INFO L124 PetriNetUnfolderBase]: 8039/11436 cut-off events. [2024-06-14 12:05:33,760 INFO L125 PetriNetUnfolderBase]: For 36150/36150 co-relation queries the response was YES. [2024-06-14 12:05:33,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38662 conditions, 11436 events. 8039/11436 cut-off events. For 36150/36150 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 64378 event pairs, 3744 based on Foata normal form. 6/11276 useless extension candidates. Maximal degree in co-relation 38636. Up to 10907 conditions per place. [2024-06-14 12:05:33,825 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 85 selfloop transitions, 17 changer transitions 0/110 dead transitions. [2024-06-14 12:05:33,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 110 transitions, 779 flow [2024-06-14 12:05:33,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:05:33,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:05:33,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 12:05:33,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-14 12:05:33,827 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 438 flow. Second operand 7 states and 182 transitions. [2024-06-14 12:05:33,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 110 transitions, 779 flow [2024-06-14 12:05:33,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 688 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:33,850 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 459 flow [2024-06-14 12:05:33,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=459, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-06-14 12:05:33,850 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-14 12:05:33,851 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 459 flow [2024-06-14 12:05:33,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-14 12:05:33,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:33,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:33,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:05:33,851 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:33,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:33,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1707952907, now seen corresponding path program 1 times [2024-06-14 12:05:33,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:33,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646792349] [2024-06-14 12:05:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:33,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:34,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:34,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646792349] [2024-06-14 12:05:34,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646792349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:34,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:34,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:05:34,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523525036] [2024-06-14 12:05:34,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:34,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:05:34,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:34,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:05:34,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:05:34,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:05:34,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 459 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:34,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:34,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:05:34,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:36,158 INFO L124 PetriNetUnfolderBase]: 8025/11546 cut-off events. [2024-06-14 12:05:36,158 INFO L125 PetriNetUnfolderBase]: For 44840/44840 co-relation queries the response was YES. [2024-06-14 12:05:36,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41243 conditions, 11546 events. 8025/11546 cut-off events. For 44840/44840 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 65926 event pairs, 3811 based on Foata normal form. 4/11532 useless extension candidates. Maximal degree in co-relation 41215. Up to 10931 conditions per place. [2024-06-14 12:05:36,244 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 79 selfloop transitions, 10 changer transitions 0/97 dead transitions. [2024-06-14 12:05:36,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 97 transitions, 707 flow [2024-06-14 12:05:36,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:05:36,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:05:36,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-14 12:05:36,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4867924528301887 [2024-06-14 12:05:36,246 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 459 flow. Second operand 5 states and 129 transitions. [2024-06-14 12:05:36,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 97 transitions, 707 flow [2024-06-14 12:05:36,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 97 transitions, 659 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:05:36,274 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 480 flow [2024-06-14 12:05:36,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=480, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-14 12:05:36,275 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-06-14 12:05:36,275 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 480 flow [2024-06-14 12:05:36,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:36,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:36,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:36,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:05:36,278 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:36,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:36,281 INFO L85 PathProgramCache]: Analyzing trace with hash 179240646, now seen corresponding path program 1 times [2024-06-14 12:05:36,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:36,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369649839] [2024-06-14 12:05:36,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:36,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:37,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:37,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369649839] [2024-06-14 12:05:37,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369649839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:37,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:37,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:05:37,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745896869] [2024-06-14 12:05:37,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:37,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:05:37,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:37,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:05:37,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:05:37,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:05:37,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 480 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:37,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:37,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:05:37,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:38,950 INFO L124 PetriNetUnfolderBase]: 9156/12791 cut-off events. [2024-06-14 12:05:38,951 INFO L125 PetriNetUnfolderBase]: For 69344/69376 co-relation queries the response was YES. [2024-06-14 12:05:38,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49743 conditions, 12791 events. 9156/12791 cut-off events. For 69344/69376 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 72039 event pairs, 3617 based on Foata normal form. 34/12815 useless extension candidates. Maximal degree in co-relation 49714. Up to 11790 conditions per place. [2024-06-14 12:05:39,036 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 90 selfloop transitions, 32 changer transitions 0/131 dead transitions. [2024-06-14 12:05:39,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 131 transitions, 948 flow [2024-06-14 12:05:39,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:05:39,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:05:39,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-14 12:05:39,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-14 12:05:39,038 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 480 flow. Second operand 7 states and 196 transitions. [2024-06-14 12:05:39,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 131 transitions, 948 flow [2024-06-14 12:05:39,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 131 transitions, 909 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 12:05:39,060 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 570 flow [2024-06-14 12:05:39,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=570, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-14 12:05:39,061 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-14 12:05:39,061 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 570 flow [2024-06-14 12:05:39,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:39,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:39,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:39,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:05:39,062 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:39,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:39,062 INFO L85 PathProgramCache]: Analyzing trace with hash 179301096, now seen corresponding path program 2 times [2024-06-14 12:05:39,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:39,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689117884] [2024-06-14 12:05:39,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:39,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:39,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:39,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689117884] [2024-06-14 12:05:39,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689117884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:39,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:39,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:05:39,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458837867] [2024-06-14 12:05:39,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:39,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:05:39,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:39,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:05:39,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:05:40,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:05:40,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 570 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:40,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:40,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:05:40,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:41,864 INFO L124 PetriNetUnfolderBase]: 9349/13097 cut-off events. [2024-06-14 12:05:41,864 INFO L125 PetriNetUnfolderBase]: For 83910/83942 co-relation queries the response was YES. [2024-06-14 12:05:41,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52977 conditions, 13097 events. 9349/13097 cut-off events. For 83910/83942 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 74177 event pairs, 3828 based on Foata normal form. 62/13149 useless extension candidates. Maximal degree in co-relation 52947. Up to 12444 conditions per place. [2024-06-14 12:05:41,969 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 87 selfloop transitions, 31 changer transitions 0/127 dead transitions. [2024-06-14 12:05:41,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 127 transitions, 942 flow [2024-06-14 12:05:41,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:05:41,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:05:41,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-14 12:05:41,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175202156334232 [2024-06-14 12:05:41,971 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 570 flow. Second operand 7 states and 192 transitions. [2024-06-14 12:05:41,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 127 transitions, 942 flow [2024-06-14 12:05:42,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 127 transitions, 895 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 12:05:42,009 INFO L231 Difference]: Finished difference. Result has 85 places, 89 transitions, 638 flow [2024-06-14 12:05:42,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=638, PETRI_PLACES=85, PETRI_TRANSITIONS=89} [2024-06-14 12:05:42,009 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-06-14 12:05:42,009 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 89 transitions, 638 flow [2024-06-14 12:05:42,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:42,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:42,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:42,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:05:42,010 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:42,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:42,011 INFO L85 PathProgramCache]: Analyzing trace with hash -676627564, now seen corresponding path program 1 times [2024-06-14 12:05:42,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:42,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389482703] [2024-06-14 12:05:42,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:42,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:42,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:42,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389482703] [2024-06-14 12:05:42,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389482703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:42,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:42,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:05:42,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850173662] [2024-06-14 12:05:42,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:42,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:05:42,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:42,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:05:42,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:05:42,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:05:42,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 89 transitions, 638 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:42,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:42,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:05:42,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:44,455 INFO L124 PetriNetUnfolderBase]: 9615/13441 cut-off events. [2024-06-14 12:05:44,455 INFO L125 PetriNetUnfolderBase]: For 95754/95754 co-relation queries the response was YES. [2024-06-14 12:05:44,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56108 conditions, 13441 events. 9615/13441 cut-off events. For 95754/95754 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 74133 event pairs, 4323 based on Foata normal form. 4/13439 useless extension candidates. Maximal degree in co-relation 56076. Up to 13042 conditions per place. [2024-06-14 12:05:44,568 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 98 selfloop transitions, 21 changer transitions 0/126 dead transitions. [2024-06-14 12:05:44,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 126 transitions, 1072 flow [2024-06-14 12:05:44,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:05:44,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:05:44,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-14 12:05:44,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968553459119497 [2024-06-14 12:05:44,570 INFO L175 Difference]: Start difference. First operand has 85 places, 89 transitions, 638 flow. Second operand 6 states and 158 transitions. [2024-06-14 12:05:44,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 126 transitions, 1072 flow [2024-06-14 12:05:44,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 126 transitions, 993 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 12:05:44,659 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 698 flow [2024-06-14 12:05:44,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=698, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2024-06-14 12:05:44,661 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-14 12:05:44,662 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 698 flow [2024-06-14 12:05:44,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:44,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:44,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:44,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:05:44,665 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:44,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:44,666 INFO L85 PathProgramCache]: Analyzing trace with hash 706980654, now seen corresponding path program 1 times [2024-06-14 12:05:44,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:44,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263188393] [2024-06-14 12:05:44,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:44,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:45,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:45,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263188393] [2024-06-14 12:05:45,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263188393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:45,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:45,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:45,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829545679] [2024-06-14 12:05:45,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:45,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:45,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:45,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:45,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:45,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:05:45,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 698 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:45,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:45,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:05:45,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:47,539 INFO L124 PetriNetUnfolderBase]: 9673/13495 cut-off events. [2024-06-14 12:05:47,539 INFO L125 PetriNetUnfolderBase]: For 113741/113747 co-relation queries the response was YES. [2024-06-14 12:05:47,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59072 conditions, 13495 events. 9673/13495 cut-off events. For 113741/113747 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 74098 event pairs, 4116 based on Foata normal form. 8/13489 useless extension candidates. Maximal degree in co-relation 59039. Up to 12941 conditions per place. [2024-06-14 12:05:47,645 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 102 selfloop transitions, 37 changer transitions 0/146 dead transitions. [2024-06-14 12:05:47,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 146 transitions, 1160 flow [2024-06-14 12:05:47,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:47,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:47,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 12:05:47,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-14 12:05:47,649 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 698 flow. Second operand 8 states and 208 transitions. [2024-06-14 12:05:47,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 146 transitions, 1160 flow [2024-06-14 12:05:47,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 146 transitions, 1118 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-14 12:05:47,742 INFO L231 Difference]: Finished difference. Result has 93 places, 105 transitions, 831 flow [2024-06-14 12:05:47,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=831, PETRI_PLACES=93, PETRI_TRANSITIONS=105} [2024-06-14 12:05:47,743 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 37 predicate places. [2024-06-14 12:05:47,743 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 105 transitions, 831 flow [2024-06-14 12:05:47,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:47,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:47,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:47,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:05:47,744 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:47,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:47,744 INFO L85 PathProgramCache]: Analyzing trace with hash -271108072, now seen corresponding path program 2 times [2024-06-14 12:05:47,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:47,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733005011] [2024-06-14 12:05:47,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:47,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:48,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:48,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733005011] [2024-06-14 12:05:48,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733005011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:48,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:48,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:48,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615826557] [2024-06-14 12:05:48,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:48,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:48,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:48,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:48,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:48,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:05:48,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 105 transitions, 831 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:48,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:48,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:05:48,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:50,715 INFO L124 PetriNetUnfolderBase]: 9658/13479 cut-off events. [2024-06-14 12:05:50,715 INFO L125 PetriNetUnfolderBase]: For 130533/130539 co-relation queries the response was YES. [2024-06-14 12:05:50,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61510 conditions, 13479 events. 9658/13479 cut-off events. For 130533/130539 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 74007 event pairs, 4113 based on Foata normal form. 8/13473 useless extension candidates. Maximal degree in co-relation 61474. Up to 12920 conditions per place. [2024-06-14 12:05:50,825 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 104 selfloop transitions, 45 changer transitions 0/156 dead transitions. [2024-06-14 12:05:50,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 156 transitions, 1359 flow [2024-06-14 12:05:50,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:50,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:50,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 12:05:50,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-14 12:05:50,827 INFO L175 Difference]: Start difference. First operand has 93 places, 105 transitions, 831 flow. Second operand 8 states and 208 transitions. [2024-06-14 12:05:50,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 156 transitions, 1359 flow [2024-06-14 12:05:50,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 156 transitions, 1241 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 12:05:50,919 INFO L231 Difference]: Finished difference. Result has 97 places, 116 transitions, 960 flow [2024-06-14 12:05:50,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=960, PETRI_PLACES=97, PETRI_TRANSITIONS=116} [2024-06-14 12:05:50,920 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 41 predicate places. [2024-06-14 12:05:50,920 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 116 transitions, 960 flow [2024-06-14 12:05:50,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:50,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:50,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:50,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:05:50,920 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:50,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:50,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1041255616, now seen corresponding path program 3 times [2024-06-14 12:05:50,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:50,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009031354] [2024-06-14 12:05:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:50,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:51,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:51,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009031354] [2024-06-14 12:05:51,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009031354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:51,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:51,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:51,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134303975] [2024-06-14 12:05:51,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:51,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:51,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:51,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:51,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:51,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:05:51,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 116 transitions, 960 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:51,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:51,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:05:51,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:53,605 INFO L124 PetriNetUnfolderBase]: 9735/13614 cut-off events. [2024-06-14 12:05:53,605 INFO L125 PetriNetUnfolderBase]: For 148207/148213 co-relation queries the response was YES. [2024-06-14 12:05:53,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64054 conditions, 13614 events. 9735/13614 cut-off events. For 148207/148213 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 75093 event pairs, 3700 based on Foata normal form. 8/13608 useless extension candidates. Maximal degree in co-relation 64016. Up to 12759 conditions per place. [2024-06-14 12:05:53,697 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 102 selfloop transitions, 56 changer transitions 0/165 dead transitions. [2024-06-14 12:05:53,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 165 transitions, 1458 flow [2024-06-14 12:05:53,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:53,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:53,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 12:05:53,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:05:53,700 INFO L175 Difference]: Start difference. First operand has 97 places, 116 transitions, 960 flow. Second operand 8 states and 212 transitions. [2024-06-14 12:05:53,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 165 transitions, 1458 flow [2024-06-14 12:05:53,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 165 transitions, 1364 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 12:05:53,791 INFO L231 Difference]: Finished difference. Result has 103 places, 121 transitions, 1079 flow [2024-06-14 12:05:53,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1079, PETRI_PLACES=103, PETRI_TRANSITIONS=121} [2024-06-14 12:05:53,792 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2024-06-14 12:05:53,792 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 121 transitions, 1079 flow [2024-06-14 12:05:53,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:53,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:53,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:53,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:05:53,793 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:53,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:53,793 INFO L85 PathProgramCache]: Analyzing trace with hash 165969176, now seen corresponding path program 2 times [2024-06-14 12:05:53,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:53,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717083043] [2024-06-14 12:05:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:53,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:54,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:54,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717083043] [2024-06-14 12:05:54,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717083043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:54,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:54,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:05:54,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025764117] [2024-06-14 12:05:54,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:54,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:05:54,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:54,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:05:54,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:05:54,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:05:54,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 121 transitions, 1079 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:54,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:54,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:05:54,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:56,229 INFO L124 PetriNetUnfolderBase]: 9721/13606 cut-off events. [2024-06-14 12:05:56,229 INFO L125 PetriNetUnfolderBase]: For 166960/166972 co-relation queries the response was YES. [2024-06-14 12:05:56,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65940 conditions, 13606 events. 9721/13606 cut-off events. For 166960/166972 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 75115 event pairs, 4061 based on Foata normal form. 14/13615 useless extension candidates. Maximal degree in co-relation 65900. Up to 13210 conditions per place. [2024-06-14 12:05:56,349 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 113 selfloop transitions, 21 changer transitions 0/141 dead transitions. [2024-06-14 12:05:56,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 141 transitions, 1397 flow [2024-06-14 12:05:56,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:05:56,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:05:56,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 12:05:56,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46855345911949686 [2024-06-14 12:05:56,351 INFO L175 Difference]: Start difference. First operand has 103 places, 121 transitions, 1079 flow. Second operand 6 states and 149 transitions. [2024-06-14 12:05:56,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 141 transitions, 1397 flow [2024-06-14 12:05:56,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 141 transitions, 1246 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 12:05:56,644 INFO L231 Difference]: Finished difference. Result has 104 places, 121 transitions, 979 flow [2024-06-14 12:05:56,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=979, PETRI_PLACES=104, PETRI_TRANSITIONS=121} [2024-06-14 12:05:56,645 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2024-06-14 12:05:56,645 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 121 transitions, 979 flow [2024-06-14 12:05:56,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:56,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:56,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:56,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:05:56,645 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:56,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:56,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1205960920, now seen corresponding path program 1 times [2024-06-14 12:05:56,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:56,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699223626] [2024-06-14 12:05:56,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:56,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:57,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:57,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699223626] [2024-06-14 12:05:57,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699223626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:57,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:57,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:05:57,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169008428] [2024-06-14 12:05:57,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:57,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:05:57,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:57,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:05:57,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:05:57,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:05:57,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 121 transitions, 979 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-14 12:05:57,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:57,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:05:57,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:58,984 INFO L124 PetriNetUnfolderBase]: 8603/12342 cut-off events. [2024-06-14 12:05:58,984 INFO L125 PetriNetUnfolderBase]: For 154624/154624 co-relation queries the response was YES. [2024-06-14 12:05:59,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59491 conditions, 12342 events. 8603/12342 cut-off events. For 154624/154624 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 70410 event pairs, 3476 based on Foata normal form. 4/12306 useless extension candidates. Maximal degree in co-relation 59450. Up to 11727 conditions per place. [2024-06-14 12:05:59,091 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 126 selfloop transitions, 21 changer transitions 0/155 dead transitions. [2024-06-14 12:05:59,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 155 transitions, 1485 flow [2024-06-14 12:05:59,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:05:59,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:05:59,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 12:05:59,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2024-06-14 12:05:59,093 INFO L175 Difference]: Start difference. First operand has 104 places, 121 transitions, 979 flow. Second operand 6 states and 160 transitions. [2024-06-14 12:05:59,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 155 transitions, 1485 flow [2024-06-14 12:05:59,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 155 transitions, 1426 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 12:05:59,217 INFO L231 Difference]: Finished difference. Result has 105 places, 129 transitions, 1063 flow [2024-06-14 12:05:59,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1063, PETRI_PLACES=105, PETRI_TRANSITIONS=129} [2024-06-14 12:05:59,218 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-06-14 12:05:59,218 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 129 transitions, 1063 flow [2024-06-14 12:05:59,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-14 12:05:59,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:59,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:59,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:05:59,219 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:59,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:59,219 INFO L85 PathProgramCache]: Analyzing trace with hash 193680758, now seen corresponding path program 2 times [2024-06-14 12:05:59,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:59,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544081356] [2024-06-14 12:05:59,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:59,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:59,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:59,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544081356] [2024-06-14 12:05:59,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544081356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:59,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:59,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:05:59,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176503105] [2024-06-14 12:05:59,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:59,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:05:59,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:59,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:05:59,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:06:00,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:06:00,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 129 transitions, 1063 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-14 12:06:00,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:00,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:06:00,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:01,545 INFO L124 PetriNetUnfolderBase]: 8589/12328 cut-off events. [2024-06-14 12:06:01,545 INFO L125 PetriNetUnfolderBase]: For 174008/174014 co-relation queries the response was YES. [2024-06-14 12:06:01,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62039 conditions, 12328 events. 8589/12328 cut-off events. For 174008/174014 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 70427 event pairs, 3453 based on Foata normal form. 8/12300 useless extension candidates. Maximal degree in co-relation 61997. Up to 11715 conditions per place. [2024-06-14 12:06:01,654 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 120 selfloop transitions, 21 changer transitions 0/149 dead transitions. [2024-06-14 12:06:01,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 149 transitions, 1395 flow [2024-06-14 12:06:01,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:06:01,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:06:01,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 12:06:01,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-14 12:06:01,656 INFO L175 Difference]: Start difference. First operand has 105 places, 129 transitions, 1063 flow. Second operand 6 states and 154 transitions. [2024-06-14 12:06:01,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 149 transitions, 1395 flow [2024-06-14 12:06:01,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 149 transitions, 1325 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-14 12:06:01,783 INFO L231 Difference]: Finished difference. Result has 109 places, 129 transitions, 1044 flow [2024-06-14 12:06:01,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1044, PETRI_PLACES=109, PETRI_TRANSITIONS=129} [2024-06-14 12:06:01,784 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 53 predicate places. [2024-06-14 12:06:01,784 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 129 transitions, 1044 flow [2024-06-14 12:06:01,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-14 12:06:01,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:01,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:01,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:06:01,784 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:01,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:01,785 INFO L85 PathProgramCache]: Analyzing trace with hash 499372978, now seen corresponding path program 1 times [2024-06-14 12:06:01,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:01,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51738268] [2024-06-14 12:06:01,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:01,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:02,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:02,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51738268] [2024-06-14 12:06:02,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51738268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:02,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:02,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:06:02,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318106675] [2024-06-14 12:06:02,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:02,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:06:02,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:02,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:06:02,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:06:02,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:06:02,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 129 transitions, 1044 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:02,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:02,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:06:02,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:04,577 INFO L124 PetriNetUnfolderBase]: 9849/13814 cut-off events. [2024-06-14 12:06:04,578 INFO L125 PetriNetUnfolderBase]: For 222650/222656 co-relation queries the response was YES. [2024-06-14 12:06:04,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71172 conditions, 13814 events. 9849/13814 cut-off events. For 222650/222656 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 76674 event pairs, 3955 based on Foata normal form. 12/13815 useless extension candidates. Maximal degree in co-relation 71128. Up to 13008 conditions per place. [2024-06-14 12:06:04,689 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 130 selfloop transitions, 52 changer transitions 0/189 dead transitions. [2024-06-14 12:06:04,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 189 transitions, 1846 flow [2024-06-14 12:06:04,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:06:04,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:06:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-14 12:06:04,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522911051212938 [2024-06-14 12:06:04,693 INFO L175 Difference]: Start difference. First operand has 109 places, 129 transitions, 1044 flow. Second operand 7 states and 194 transitions. [2024-06-14 12:06:04,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 189 transitions, 1846 flow [2024-06-14 12:06:04,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 189 transitions, 1791 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 12:06:04,807 INFO L231 Difference]: Finished difference. Result has 113 places, 147 transitions, 1354 flow [2024-06-14 12:06:04,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1354, PETRI_PLACES=113, PETRI_TRANSITIONS=147} [2024-06-14 12:06:04,808 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-14 12:06:04,808 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 147 transitions, 1354 flow [2024-06-14 12:06:04,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:04,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:04,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:04,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:06:04,808 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:04,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:04,820 INFO L85 PathProgramCache]: Analyzing trace with hash 634843924, now seen corresponding path program 1 times [2024-06-14 12:06:04,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:04,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573280877] [2024-06-14 12:06:04,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:04,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:05,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:05,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573280877] [2024-06-14 12:06:05,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573280877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:05,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:05,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:05,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600252766] [2024-06-14 12:06:05,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:05,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:05,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:05,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:05,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:05,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:06:05,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 147 transitions, 1354 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:05,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:05,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:06:05,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:08,347 INFO L124 PetriNetUnfolderBase]: 10091/14202 cut-off events. [2024-06-14 12:06:08,348 INFO L125 PetriNetUnfolderBase]: For 259323/259323 co-relation queries the response was YES. [2024-06-14 12:06:08,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77609 conditions, 14202 events. 10091/14202 cut-off events. For 259323/259323 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 79613 event pairs, 4079 based on Foata normal form. 18/14212 useless extension candidates. Maximal degree in co-relation 77562. Up to 13080 conditions per place. [2024-06-14 12:06:08,466 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 144 selfloop transitions, 53 changer transitions 0/204 dead transitions. [2024-06-14 12:06:08,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 204 transitions, 1981 flow [2024-06-14 12:06:08,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:08,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-14 12:06:08,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023584905660378 [2024-06-14 12:06:08,468 INFO L175 Difference]: Start difference. First operand has 113 places, 147 transitions, 1354 flow. Second operand 8 states and 213 transitions. [2024-06-14 12:06:08,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 204 transitions, 1981 flow [2024-06-14 12:06:08,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 204 transitions, 1879 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-14 12:06:08,675 INFO L231 Difference]: Finished difference. Result has 120 places, 156 transitions, 1517 flow [2024-06-14 12:06:08,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1517, PETRI_PLACES=120, PETRI_TRANSITIONS=156} [2024-06-14 12:06:08,676 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 64 predicate places. [2024-06-14 12:06:08,676 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 156 transitions, 1517 flow [2024-06-14 12:06:08,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:08,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:08,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:08,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:06:08,677 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:08,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:08,677 INFO L85 PathProgramCache]: Analyzing trace with hash 499383208, now seen corresponding path program 2 times [2024-06-14 12:06:08,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:08,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102581677] [2024-06-14 12:06:08,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:08,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:09,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:09,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:09,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102581677] [2024-06-14 12:06:09,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102581677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:09,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:09,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:06:09,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989809952] [2024-06-14 12:06:09,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:09,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:06:09,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:09,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:06:09,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:06:09,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:06:09,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 156 transitions, 1517 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:09,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:09,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:06:09,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:11,883 INFO L124 PetriNetUnfolderBase]: 10257/14446 cut-off events. [2024-06-14 12:06:11,883 INFO L125 PetriNetUnfolderBase]: For 278023/278029 co-relation queries the response was YES. [2024-06-14 12:06:11,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79971 conditions, 14446 events. 10257/14446 cut-off events. For 278023/278029 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 81118 event pairs, 4003 based on Foata normal form. 12/14446 useless extension candidates. Maximal degree in co-relation 79921. Up to 13498 conditions per place. [2024-06-14 12:06:12,005 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 137 selfloop transitions, 58 changer transitions 0/202 dead transitions. [2024-06-14 12:06:12,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 202 transitions, 2281 flow [2024-06-14 12:06:12,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:06:12,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:06:12,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-14 12:06:12,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-14 12:06:12,007 INFO L175 Difference]: Start difference. First operand has 120 places, 156 transitions, 1517 flow. Second operand 7 states and 188 transitions. [2024-06-14 12:06:12,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 202 transitions, 2281 flow [2024-06-14 12:06:12,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 202 transitions, 2193 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 12:06:12,289 INFO L231 Difference]: Finished difference. Result has 125 places, 166 transitions, 1703 flow [2024-06-14 12:06:12,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1703, PETRI_PLACES=125, PETRI_TRANSITIONS=166} [2024-06-14 12:06:12,290 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-14 12:06:12,290 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 166 transitions, 1703 flow [2024-06-14 12:06:12,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:12,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:12,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:12,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:06:12,290 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:12,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:12,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1047319192, now seen corresponding path program 2 times [2024-06-14 12:06:12,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:12,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129703529] [2024-06-14 12:06:12,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:12,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:13,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:13,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129703529] [2024-06-14 12:06:13,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129703529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:13,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:13,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:13,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028913768] [2024-06-14 12:06:13,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:13,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:13,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:13,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:13,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:13,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:06:13,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 166 transitions, 1703 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:13,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:13,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:06:13,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:15,513 INFO L124 PetriNetUnfolderBase]: 10218/14392 cut-off events. [2024-06-14 12:06:15,513 INFO L125 PetriNetUnfolderBase]: For 297083/297083 co-relation queries the response was YES. [2024-06-14 12:06:15,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80455 conditions, 14392 events. 10218/14392 cut-off events. For 297083/297083 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 80676 event pairs, 2988 based on Foata normal form. 18/14402 useless extension candidates. Maximal degree in co-relation 80403. Up to 12561 conditions per place. [2024-06-14 12:06:15,644 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 140 selfloop transitions, 61 changer transitions 0/208 dead transitions. [2024-06-14 12:06:15,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 208 transitions, 2225 flow [2024-06-14 12:06:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:06:15,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:06:15,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-14 12:06:15,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121293800539084 [2024-06-14 12:06:15,645 INFO L175 Difference]: Start difference. First operand has 125 places, 166 transitions, 1703 flow. Second operand 7 states and 190 transitions. [2024-06-14 12:06:15,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 208 transitions, 2225 flow [2024-06-14 12:06:15,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 208 transitions, 2103 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-14 12:06:15,970 INFO L231 Difference]: Finished difference. Result has 129 places, 166 transitions, 1716 flow [2024-06-14 12:06:15,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1716, PETRI_PLACES=129, PETRI_TRANSITIONS=166} [2024-06-14 12:06:15,970 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-06-14 12:06:15,971 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 166 transitions, 1716 flow [2024-06-14 12:06:15,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:15,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:15,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:15,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:06:15,971 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:15,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:15,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1313016472, now seen corresponding path program 3 times [2024-06-14 12:06:15,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:15,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664102328] [2024-06-14 12:06:15,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:15,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:16,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:16,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664102328] [2024-06-14 12:06:16,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664102328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:16,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:16,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:16,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993079046] [2024-06-14 12:06:16,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:16,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:16,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:16,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:16,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:17,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:06:17,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 166 transitions, 1716 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:17,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:17,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:06:17,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:18,941 INFO L124 PetriNetUnfolderBase]: 10179/14324 cut-off events. [2024-06-14 12:06:18,942 INFO L125 PetriNetUnfolderBase]: For 315419/315423 co-relation queries the response was YES. [2024-06-14 12:06:19,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80702 conditions, 14324 events. 10179/14324 cut-off events. For 315419/315423 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 80210 event pairs, 2511 based on Foata normal form. 19/14318 useless extension candidates. Maximal degree in co-relation 80649. Up to 12322 conditions per place. [2024-06-14 12:06:19,109 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 134 selfloop transitions, 63 changer transitions 0/204 dead transitions. [2024-06-14 12:06:19,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 204 transitions, 2224 flow [2024-06-14 12:06:19,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:06:19,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:06:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 12:06:19,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-14 12:06:19,120 INFO L175 Difference]: Start difference. First operand has 129 places, 166 transitions, 1716 flow. Second operand 7 states and 183 transitions. [2024-06-14 12:06:19,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 204 transitions, 2224 flow [2024-06-14 12:06:19,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 204 transitions, 2062 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 12:06:19,402 INFO L231 Difference]: Finished difference. Result has 129 places, 167 transitions, 1699 flow [2024-06-14 12:06:19,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1699, PETRI_PLACES=129, PETRI_TRANSITIONS=167} [2024-06-14 12:06:19,402 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-06-14 12:06:19,402 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 167 transitions, 1699 flow [2024-06-14 12:06:19,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:19,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:19,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:19,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:06:19,403 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:19,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:19,405 INFO L85 PathProgramCache]: Analyzing trace with hash 853646248, now seen corresponding path program 3 times [2024-06-14 12:06:19,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:19,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475381799] [2024-06-14 12:06:19,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:19,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:20,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:20,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475381799] [2024-06-14 12:06:20,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475381799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:20,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:20,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:06:20,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770815349] [2024-06-14 12:06:20,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:20,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:06:20,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:20,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:06:20,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:06:20,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:06:20,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 167 transitions, 1699 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:20,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:20,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:06:20,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:22,521 INFO L124 PetriNetUnfolderBase]: 10161/14292 cut-off events. [2024-06-14 12:06:22,522 INFO L125 PetriNetUnfolderBase]: For 315137/315156 co-relation queries the response was YES. [2024-06-14 12:06:22,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80967 conditions, 14292 events. 10161/14292 cut-off events. For 315137/315156 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 79867 event pairs, 3989 based on Foata normal form. 19/14295 useless extension candidates. Maximal degree in co-relation 80913. Up to 13376 conditions per place. [2024-06-14 12:06:22,656 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 131 selfloop transitions, 58 changer transitions 0/196 dead transitions. [2024-06-14 12:06:22,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 196 transitions, 2323 flow [2024-06-14 12:06:22,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:06:22,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:06:22,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 12:06:22,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48787061994609165 [2024-06-14 12:06:22,658 INFO L175 Difference]: Start difference. First operand has 129 places, 167 transitions, 1699 flow. Second operand 7 states and 181 transitions. [2024-06-14 12:06:22,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 196 transitions, 2323 flow [2024-06-14 12:06:22,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 196 transitions, 2148 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 12:06:22,902 INFO L231 Difference]: Finished difference. Result has 131 places, 167 transitions, 1651 flow [2024-06-14 12:06:22,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1651, PETRI_PLACES=131, PETRI_TRANSITIONS=167} [2024-06-14 12:06:22,904 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-14 12:06:22,904 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 167 transitions, 1651 flow [2024-06-14 12:06:22,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:22,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:22,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:22,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:06:22,904 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:22,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:22,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1201545088, now seen corresponding path program 1 times [2024-06-14 12:06:22,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:22,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470730475] [2024-06-14 12:06:22,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:22,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:24,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:24,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470730475] [2024-06-14 12:06:24,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470730475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:24,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:24,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:06:24,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221503615] [2024-06-14 12:06:24,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:24,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:06:24,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:24,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:06:24,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:06:24,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:06:24,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 167 transitions, 1651 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:24,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:24,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:06:24,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:26,091 INFO L124 PetriNetUnfolderBase]: 9043/13069 cut-off events. [2024-06-14 12:06:26,092 INFO L125 PetriNetUnfolderBase]: For 286649/286649 co-relation queries the response was YES. [2024-06-14 12:06:26,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73105 conditions, 13069 events. 9043/13069 cut-off events. For 286649/286649 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 75962 event pairs, 3499 based on Foata normal form. 4/12972 useless extension candidates. Maximal degree in co-relation 73050. Up to 12371 conditions per place. [2024-06-14 12:06:26,194 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 174 selfloop transitions, 18 changer transitions 0/200 dead transitions. [2024-06-14 12:06:26,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 200 transitions, 2161 flow [2024-06-14 12:06:26,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:06:26,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:06:26,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 12:06:26,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-14 12:06:26,196 INFO L175 Difference]: Start difference. First operand has 131 places, 167 transitions, 1651 flow. Second operand 7 states and 178 transitions. [2024-06-14 12:06:26,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 200 transitions, 2161 flow [2024-06-14 12:06:26,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 200 transitions, 2002 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 12:06:26,369 INFO L231 Difference]: Finished difference. Result has 132 places, 171 transitions, 1597 flow [2024-06-14 12:06:26,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1492, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1597, PETRI_PLACES=132, PETRI_TRANSITIONS=171} [2024-06-14 12:06:26,369 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 76 predicate places. [2024-06-14 12:06:26,370 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 171 transitions, 1597 flow [2024-06-14 12:06:26,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:26,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:26,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:26,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:06:26,371 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:26,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:26,371 INFO L85 PathProgramCache]: Analyzing trace with hash 676699426, now seen corresponding path program 2 times [2024-06-14 12:06:26,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:26,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426343544] [2024-06-14 12:06:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:26,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:27,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:27,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426343544] [2024-06-14 12:06:27,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426343544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:27,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:27,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:06:27,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640026314] [2024-06-14 12:06:27,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:27,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:06:27,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:27,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:06:27,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:06:27,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:06:27,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 171 transitions, 1597 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:27,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:27,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:06:27,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:29,194 INFO L124 PetriNetUnfolderBase]: 9075/13132 cut-off events. [2024-06-14 12:06:29,194 INFO L125 PetriNetUnfolderBase]: For 309861/309861 co-relation queries the response was YES. [2024-06-14 12:06:29,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75107 conditions, 13132 events. 9075/13132 cut-off events. For 309861/309861 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 76434 event pairs, 3438 based on Foata normal form. 4/13029 useless extension candidates. Maximal degree in co-relation 75053. Up to 12302 conditions per place. [2024-06-14 12:06:29,309 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 167 selfloop transitions, 35 changer transitions 0/210 dead transitions. [2024-06-14 12:06:29,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 210 transitions, 2293 flow [2024-06-14 12:06:29,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:06:29,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:06:29,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 12:06:29,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-14 12:06:29,311 INFO L175 Difference]: Start difference. First operand has 132 places, 171 transitions, 1597 flow. Second operand 7 states and 184 transitions. [2024-06-14 12:06:29,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 210 transitions, 2293 flow [2024-06-14 12:06:29,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 210 transitions, 2218 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 12:06:29,567 INFO L231 Difference]: Finished difference. Result has 134 places, 179 transitions, 1729 flow [2024-06-14 12:06:29,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1729, PETRI_PLACES=134, PETRI_TRANSITIONS=179} [2024-06-14 12:06:29,568 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 78 predicate places. [2024-06-14 12:06:29,568 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 179 transitions, 1729 flow [2024-06-14 12:06:29,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:29,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:29,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:29,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:06:29,569 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:29,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:29,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1709137600, now seen corresponding path program 3 times [2024-06-14 12:06:29,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:29,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042595704] [2024-06-14 12:06:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:29,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:30,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:30,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:30,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042595704] [2024-06-14 12:06:30,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042595704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:30,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:30,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:06:30,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338475935] [2024-06-14 12:06:30,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:30,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:06:30,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:30,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:06:30,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:06:30,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:06:30,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 179 transitions, 1729 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:30,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:30,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:06:30,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:32,551 INFO L124 PetriNetUnfolderBase]: 9061/13112 cut-off events. [2024-06-14 12:06:32,551 INFO L125 PetriNetUnfolderBase]: For 336806/336806 co-relation queries the response was YES. [2024-06-14 12:06:32,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77560 conditions, 13112 events. 9061/13112 cut-off events. For 336806/336806 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 76254 event pairs, 3396 based on Foata normal form. 4/13013 useless extension candidates. Maximal degree in co-relation 77505. Up to 12290 conditions per place. [2024-06-14 12:06:32,725 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 161 selfloop transitions, 35 changer transitions 0/204 dead transitions. [2024-06-14 12:06:32,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 204 transitions, 2183 flow [2024-06-14 12:06:32,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:06:32,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:06:32,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 12:06:32,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-14 12:06:32,727 INFO L175 Difference]: Start difference. First operand has 134 places, 179 transitions, 1729 flow. Second operand 7 states and 178 transitions. [2024-06-14 12:06:32,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 204 transitions, 2183 flow [2024-06-14 12:06:33,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 204 transitions, 2075 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-14 12:06:33,156 INFO L231 Difference]: Finished difference. Result has 138 places, 179 transitions, 1700 flow [2024-06-14 12:06:33,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1621, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1700, PETRI_PLACES=138, PETRI_TRANSITIONS=179} [2024-06-14 12:06:33,157 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 82 predicate places. [2024-06-14 12:06:33,157 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 179 transitions, 1700 flow [2024-06-14 12:06:33,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:33,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:33,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:33,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:06:33,158 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:33,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:33,158 INFO L85 PathProgramCache]: Analyzing trace with hash 854077210, now seen corresponding path program 1 times [2024-06-14 12:06:33,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:33,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123728296] [2024-06-14 12:06:33,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:33,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:34,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:34,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123728296] [2024-06-14 12:06:34,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123728296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:34,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:34,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:06:34,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958371160] [2024-06-14 12:06:34,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:34,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:06:34,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:34,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:06:34,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:06:34,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:06:34,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 179 transitions, 1700 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:34,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:34,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:06:34,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:36,624 INFO L124 PetriNetUnfolderBase]: 9049/13100 cut-off events. [2024-06-14 12:06:36,625 INFO L125 PetriNetUnfolderBase]: For 355127/355127 co-relation queries the response was YES. [2024-06-14 12:06:36,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77671 conditions, 13100 events. 9049/13100 cut-off events. For 355127/355127 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 76242 event pairs, 3412 based on Foata normal form. 4/13028 useless extension candidates. Maximal degree in co-relation 77614. Up to 12391 conditions per place. [2024-06-14 12:06:36,767 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 184 selfloop transitions, 17 changer transitions 0/209 dead transitions. [2024-06-14 12:06:36,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 209 transitions, 2256 flow [2024-06-14 12:06:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:06:36,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:06:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 12:06:36,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2024-06-14 12:06:36,769 INFO L175 Difference]: Start difference. First operand has 138 places, 179 transitions, 1700 flow. Second operand 7 states and 171 transitions. [2024-06-14 12:06:36,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 209 transitions, 2256 flow [2024-06-14 12:06:37,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 209 transitions, 2139 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 12:06:37,231 INFO L231 Difference]: Finished difference. Result has 139 places, 186 transitions, 1734 flow [2024-06-14 12:06:37,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1590, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1734, PETRI_PLACES=139, PETRI_TRANSITIONS=186} [2024-06-14 12:06:37,232 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2024-06-14 12:06:37,232 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 186 transitions, 1734 flow [2024-06-14 12:06:37,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:37,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:37,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:37,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:06:37,233 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:37,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:37,233 INFO L85 PathProgramCache]: Analyzing trace with hash -136381210, now seen corresponding path program 1 times [2024-06-14 12:06:37,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:37,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746749116] [2024-06-14 12:06:37,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:37,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:38,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:38,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746749116] [2024-06-14 12:06:38,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746749116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:38,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:38,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:06:38,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312663137] [2024-06-14 12:06:38,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:38,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:06:38,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:38,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:06:38,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:06:38,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-14 12:06:38,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 186 transitions, 1734 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:38,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:38,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-14 12:06:38,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:40,209 INFO L124 PetriNetUnfolderBase]: 8663/12696 cut-off events. [2024-06-14 12:06:40,209 INFO L125 PetriNetUnfolderBase]: For 376752/376900 co-relation queries the response was YES. [2024-06-14 12:06:40,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78373 conditions, 12696 events. 8663/12696 cut-off events. For 376752/376900 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 76001 event pairs, 3214 based on Foata normal form. 1/12578 useless extension candidates. Maximal degree in co-relation 78315. Up to 11797 conditions per place. [2024-06-14 12:06:40,319 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 171 selfloop transitions, 10 changer transitions 0/201 dead transitions. [2024-06-14 12:06:40,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 201 transitions, 2178 flow [2024-06-14 12:06:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:06:40,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:06:40,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-14 12:06:40,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2024-06-14 12:06:40,321 INFO L175 Difference]: Start difference. First operand has 139 places, 186 transitions, 1734 flow. Second operand 5 states and 127 transitions. [2024-06-14 12:06:40,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 201 transitions, 2178 flow [2024-06-14 12:06:40,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 201 transitions, 2096 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 12:06:40,656 INFO L231 Difference]: Finished difference. Result has 140 places, 190 transitions, 1741 flow [2024-06-14 12:06:40,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1652, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1741, PETRI_PLACES=140, PETRI_TRANSITIONS=190} [2024-06-14 12:06:40,657 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-06-14 12:06:40,657 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 190 transitions, 1741 flow [2024-06-14 12:06:40,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:40,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:40,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:40,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:06:40,658 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:40,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:40,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1704698445, now seen corresponding path program 1 times [2024-06-14 12:06:40,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:40,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050911446] [2024-06-14 12:06:40,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:40,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:41,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:41,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050911446] [2024-06-14 12:06:41,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050911446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:41,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:41,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:06:41,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601352236] [2024-06-14 12:06:41,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:41,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:06:41,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:41,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:06:41,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:06:41,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:06:41,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 190 transitions, 1741 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:41,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:41,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:06:41,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:43,880 INFO L124 PetriNetUnfolderBase]: 10351/14580 cut-off events. [2024-06-14 12:06:43,880 INFO L125 PetriNetUnfolderBase]: For 476920/476929 co-relation queries the response was YES. [2024-06-14 12:06:43,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93512 conditions, 14580 events. 10351/14580 cut-off events. For 476920/476929 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 81760 event pairs, 3970 based on Foata normal form. 12/14584 useless extension candidates. Maximal degree in co-relation 93453. Up to 13523 conditions per place. [2024-06-14 12:06:44,058 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 160 selfloop transitions, 75 changer transitions 0/242 dead transitions. [2024-06-14 12:06:44,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 242 transitions, 2715 flow [2024-06-14 12:06:44,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:06:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:06:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-14 12:06:44,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121293800539084 [2024-06-14 12:06:44,060 INFO L175 Difference]: Start difference. First operand has 140 places, 190 transitions, 1741 flow. Second operand 7 states and 190 transitions. [2024-06-14 12:06:44,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 242 transitions, 2715 flow [2024-06-14 12:06:44,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 242 transitions, 2654 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 12:06:44,416 INFO L231 Difference]: Finished difference. Result has 145 places, 203 transitions, 2046 flow [2024-06-14 12:06:44,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2046, PETRI_PLACES=145, PETRI_TRANSITIONS=203} [2024-06-14 12:06:44,416 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 89 predicate places. [2024-06-14 12:06:44,416 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 203 transitions, 2046 flow [2024-06-14 12:06:44,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:44,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:44,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:44,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:06:44,417 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:44,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:44,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1698984525, now seen corresponding path program 2 times [2024-06-14 12:06:44,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:44,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147044343] [2024-06-14 12:06:44,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:44,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:45,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:45,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147044343] [2024-06-14 12:06:45,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147044343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:45,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:45,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:06:45,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109160270] [2024-06-14 12:06:45,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:45,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:06:45,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:45,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:06:45,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:06:45,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:06:45,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 203 transitions, 2046 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:45,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:45,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:06:45,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:47,513 INFO L124 PetriNetUnfolderBase]: 10323/14540 cut-off events. [2024-06-14 12:06:47,514 INFO L125 PetriNetUnfolderBase]: For 500592/500601 co-relation queries the response was YES. [2024-06-14 12:06:47,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94930 conditions, 14540 events. 10323/14540 cut-off events. For 500592/500601 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 81510 event pairs, 3933 based on Foata normal form. 12/14544 useless extension candidates. Maximal degree in co-relation 94869. Up to 13503 conditions per place. [2024-06-14 12:06:47,666 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 161 selfloop transitions, 71 changer transitions 0/239 dead transitions. [2024-06-14 12:06:47,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 239 transitions, 2834 flow [2024-06-14 12:06:47,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:06:47,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:06:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-14 12:06:47,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040431266846361 [2024-06-14 12:06:47,667 INFO L175 Difference]: Start difference. First operand has 145 places, 203 transitions, 2046 flow. Second operand 7 states and 187 transitions. [2024-06-14 12:06:47,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 239 transitions, 2834 flow [2024-06-14 12:06:48,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 239 transitions, 2713 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 12:06:48,099 INFO L231 Difference]: Finished difference. Result has 149 places, 203 transitions, 2079 flow [2024-06-14 12:06:48,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1925, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2079, PETRI_PLACES=149, PETRI_TRANSITIONS=203} [2024-06-14 12:06:48,100 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 93 predicate places. [2024-06-14 12:06:48,100 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 203 transitions, 2079 flow [2024-06-14 12:06:48,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:48,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:48,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:48,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:06:48,101 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:48,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:48,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1399092659, now seen corresponding path program 3 times [2024-06-14 12:06:48,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:48,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969636698] [2024-06-14 12:06:48,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:48,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:48,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:48,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969636698] [2024-06-14 12:06:48,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969636698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:48,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:48,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:06:48,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129520516] [2024-06-14 12:06:48,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:48,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:06:48,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:48,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:06:48,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:06:49,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:06:49,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 203 transitions, 2079 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:49,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:49,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:06:49,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:51,446 INFO L124 PetriNetUnfolderBase]: 10299/14486 cut-off events. [2024-06-14 12:06:51,446 INFO L125 PetriNetUnfolderBase]: For 526876/526881 co-relation queries the response was YES. [2024-06-14 12:06:51,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95483 conditions, 14486 events. 10299/14486 cut-off events. For 526876/526881 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 80945 event pairs, 3969 based on Foata normal form. 4/14472 useless extension candidates. Maximal degree in co-relation 95421. Up to 13483 conditions per place. [2024-06-14 12:06:51,639 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 154 selfloop transitions, 78 changer transitions 0/239 dead transitions. [2024-06-14 12:06:51,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 239 transitions, 2875 flow [2024-06-14 12:06:51,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:06:51,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:06:51,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-14 12:06:51,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040431266846361 [2024-06-14 12:06:51,641 INFO L175 Difference]: Start difference. First operand has 149 places, 203 transitions, 2079 flow. Second operand 7 states and 187 transitions. [2024-06-14 12:06:51,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 239 transitions, 2875 flow [2024-06-14 12:06:52,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 239 transitions, 2718 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 12:06:52,151 INFO L231 Difference]: Finished difference. Result has 152 places, 203 transitions, 2087 flow [2024-06-14 12:06:52,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1922, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2087, PETRI_PLACES=152, PETRI_TRANSITIONS=203} [2024-06-14 12:06:52,152 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 96 predicate places. [2024-06-14 12:06:52,152 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 203 transitions, 2087 flow [2024-06-14 12:06:52,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:52,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:52,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:52,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:06:52,153 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:52,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:52,153 INFO L85 PathProgramCache]: Analyzing trace with hash 499647253, now seen corresponding path program 4 times [2024-06-14 12:06:52,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:52,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092947959] [2024-06-14 12:06:52,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:52,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:53,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:53,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092947959] [2024-06-14 12:06:53,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092947959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:53,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:53,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:06:53,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824499859] [2024-06-14 12:06:53,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:53,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:06:53,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:53,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:06:53,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:06:53,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:06:53,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 203 transitions, 2087 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:53,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:53,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:06:53,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:55,473 INFO L124 PetriNetUnfolderBase]: 10331/14533 cut-off events. [2024-06-14 12:06:55,473 INFO L125 PetriNetUnfolderBase]: For 555368/555379 co-relation queries the response was YES. [2024-06-14 12:06:55,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96700 conditions, 14533 events. 10331/14533 cut-off events. For 555368/555379 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 81269 event pairs, 3978 based on Foata normal form. 8/14523 useless extension candidates. Maximal degree in co-relation 96637. Up to 13502 conditions per place. [2024-06-14 12:06:55,661 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 149 selfloop transitions, 82 changer transitions 0/238 dead transitions. [2024-06-14 12:06:55,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 238 transitions, 2828 flow [2024-06-14 12:06:55,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:06:55,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:06:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 12:06:55,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-14 12:06:55,676 INFO L175 Difference]: Start difference. First operand has 152 places, 203 transitions, 2087 flow. Second operand 7 states and 183 transitions. [2024-06-14 12:06:55,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 238 transitions, 2828 flow [2024-06-14 12:06:56,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 238 transitions, 2487 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 12:06:56,084 INFO L231 Difference]: Finished difference. Result has 150 places, 207 transitions, 1992 flow [2024-06-14 12:06:56,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1992, PETRI_PLACES=150, PETRI_TRANSITIONS=207} [2024-06-14 12:06:56,085 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 94 predicate places. [2024-06-14 12:06:56,085 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 207 transitions, 1992 flow [2024-06-14 12:06:56,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:56,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:56,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:56,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:06:56,086 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:56,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:56,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1437937621, now seen corresponding path program 5 times [2024-06-14 12:06:56,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:56,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424189386] [2024-06-14 12:06:56,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:56,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:56,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:56,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424189386] [2024-06-14 12:06:56,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424189386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:56,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:56,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:06:56,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385122705] [2024-06-14 12:06:56,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:56,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:06:56,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:56,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:06:56,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:06:56,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:06:57,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 207 transitions, 1992 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:57,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:57,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:06:57,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:59,385 INFO L124 PetriNetUnfolderBase]: 10303/14500 cut-off events. [2024-06-14 12:06:59,385 INFO L125 PetriNetUnfolderBase]: For 578179/578196 co-relation queries the response was YES. [2024-06-14 12:06:59,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96696 conditions, 14500 events. 10303/14500 cut-off events. For 578179/578196 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 81197 event pairs, 3940 based on Foata normal form. 18/14502 useless extension candidates. Maximal degree in co-relation 96633. Up to 13482 conditions per place. [2024-06-14 12:06:59,512 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 154 selfloop transitions, 73 changer transitions 0/234 dead transitions. [2024-06-14 12:06:59,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 234 transitions, 2644 flow [2024-06-14 12:06:59,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:06:59,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:06:59,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 12:06:59,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48247978436657685 [2024-06-14 12:06:59,514 INFO L175 Difference]: Start difference. First operand has 150 places, 207 transitions, 1992 flow. Second operand 7 states and 179 transitions. [2024-06-14 12:06:59,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 234 transitions, 2644 flow [2024-06-14 12:07:00,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 234 transitions, 2476 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 12:07:00,014 INFO L231 Difference]: Finished difference. Result has 153 places, 207 transitions, 1981 flow [2024-06-14 12:07:00,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1981, PETRI_PLACES=153, PETRI_TRANSITIONS=207} [2024-06-14 12:07:00,014 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-14 12:07:00,014 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 207 transitions, 1981 flow [2024-06-14 12:07:00,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:00,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:00,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:00,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:07:00,015 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:00,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:00,015 INFO L85 PathProgramCache]: Analyzing trace with hash 698949043, now seen corresponding path program 6 times [2024-06-14 12:07:00,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:00,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695784605] [2024-06-14 12:07:00,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:00,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:00,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:00,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695784605] [2024-06-14 12:07:00,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695784605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:00,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:00,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:07:00,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117830847] [2024-06-14 12:07:00,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:00,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:07:00,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:00,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:07:00,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:07:00,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:07:00,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 207 transitions, 1981 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:00,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:00,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:07:00,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:02,997 INFO L124 PetriNetUnfolderBase]: 10279/14469 cut-off events. [2024-06-14 12:07:02,998 INFO L125 PetriNetUnfolderBase]: For 603409/603432 co-relation queries the response was YES. [2024-06-14 12:07:03,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97174 conditions, 14469 events. 10279/14469 cut-off events. For 603409/603432 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 81047 event pairs, 3940 based on Foata normal form. 18/14471 useless extension candidates. Maximal degree in co-relation 97110. Up to 13462 conditions per place. [2024-06-14 12:07:03,178 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 148 selfloop transitions, 77 changer transitions 0/232 dead transitions. [2024-06-14 12:07:03,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 232 transitions, 2499 flow [2024-06-14 12:07:03,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:07:03,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:07:03,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 12:07:03,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743935309973046 [2024-06-14 12:07:03,180 INFO L175 Difference]: Start difference. First operand has 153 places, 207 transitions, 1981 flow. Second operand 7 states and 176 transitions. [2024-06-14 12:07:03,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 232 transitions, 2499 flow [2024-06-14 12:07:04,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 232 transitions, 2355 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:07:04,096 INFO L231 Difference]: Finished difference. Result has 156 places, 207 transitions, 2000 flow [2024-06-14 12:07:04,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1837, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2000, PETRI_PLACES=156, PETRI_TRANSITIONS=207} [2024-06-14 12:07:04,096 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 100 predicate places. [2024-06-14 12:07:04,096 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 207 transitions, 2000 flow [2024-06-14 12:07:04,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:04,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:04,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:04,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:07:04,097 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:04,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:04,098 INFO L85 PathProgramCache]: Analyzing trace with hash 67152126, now seen corresponding path program 1 times [2024-06-14 12:07:04,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:04,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393416981] [2024-06-14 12:07:04,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:04,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:05,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:05,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:05,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393416981] [2024-06-14 12:07:05,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393416981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:05,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:05,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:07:05,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809097411] [2024-06-14 12:07:05,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:05,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:07:05,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:05,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:07:05,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:07:05,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-14 12:07:05,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 207 transitions, 2000 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:05,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:05,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-14 12:07:05,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:07,023 INFO L124 PetriNetUnfolderBase]: 8673/12766 cut-off events. [2024-06-14 12:07:07,024 INFO L125 PetriNetUnfolderBase]: For 528119/528247 co-relation queries the response was YES. [2024-06-14 12:07:07,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85248 conditions, 12766 events. 8673/12766 cut-off events. For 528119/528247 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 76532 event pairs, 3180 based on Foata normal form. 1/12652 useless extension candidates. Maximal degree in co-relation 85183. Up to 11781 conditions per place. [2024-06-14 12:07:07,166 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 185 selfloop transitions, 14 changer transitions 0/223 dead transitions. [2024-06-14 12:07:07,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 223 transitions, 2488 flow [2024-06-14 12:07:07,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:07:07,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:07:07,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 12:07:07,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-14 12:07:07,167 INFO L175 Difference]: Start difference. First operand has 156 places, 207 transitions, 2000 flow. Second operand 6 states and 147 transitions. [2024-06-14 12:07:07,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 223 transitions, 2488 flow [2024-06-14 12:07:07,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 223 transitions, 2260 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 12:07:07,732 INFO L231 Difference]: Finished difference. Result has 154 places, 211 transitions, 1875 flow [2024-06-14 12:07:07,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1875, PETRI_PLACES=154, PETRI_TRANSITIONS=211} [2024-06-14 12:07:07,733 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-14 12:07:07,733 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 211 transitions, 1875 flow [2024-06-14 12:07:07,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:07,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:07,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:07,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:07:07,734 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:07,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:07,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1508686581, now seen corresponding path program 1 times [2024-06-14 12:07:07,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:07,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883583818] [2024-06-14 12:07:07,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:07,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:08,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:08,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883583818] [2024-06-14 12:07:08,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883583818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:08,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:08,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:08,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642592119] [2024-06-14 12:07:08,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:08,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:08,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:08,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:08,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:08,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:07:08,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 211 transitions, 1875 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:08,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:08,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:07:08,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:11,324 INFO L124 PetriNetUnfolderBase]: 10751/15146 cut-off events. [2024-06-14 12:07:11,324 INFO L125 PetriNetUnfolderBase]: For 699609/699618 co-relation queries the response was YES. [2024-06-14 12:07:11,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105127 conditions, 15146 events. 10751/15146 cut-off events. For 699609/699618 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 85053 event pairs, 3237 based on Foata normal form. 36/15174 useless extension candidates. Maximal degree in co-relation 105061. Up to 13476 conditions per place. [2024-06-14 12:07:11,510 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 177 selfloop transitions, 90 changer transitions 0/274 dead transitions. [2024-06-14 12:07:11,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 274 transitions, 2859 flow [2024-06-14 12:07:11,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:11,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-14 12:07:11,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212264150943396 [2024-06-14 12:07:11,512 INFO L175 Difference]: Start difference. First operand has 154 places, 211 transitions, 1875 flow. Second operand 8 states and 221 transitions. [2024-06-14 12:07:11,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 274 transitions, 2859 flow [2024-06-14 12:07:12,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 274 transitions, 2784 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 12:07:12,187 INFO L231 Difference]: Finished difference. Result has 159 places, 219 transitions, 2153 flow [2024-06-14 12:07:12,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2153, PETRI_PLACES=159, PETRI_TRANSITIONS=219} [2024-06-14 12:07:12,188 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 103 predicate places. [2024-06-14 12:07:12,188 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 219 transitions, 2153 flow [2024-06-14 12:07:12,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:12,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:12,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:12,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:07:12,188 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:12,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:12,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1424253657, now seen corresponding path program 2 times [2024-06-14 12:07:12,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:12,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976780641] [2024-06-14 12:07:12,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:12,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:13,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:13,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976780641] [2024-06-14 12:07:13,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976780641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:13,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:13,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:13,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136413763] [2024-06-14 12:07:13,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:13,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:13,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:13,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:13,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:13,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:07:13,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 219 transitions, 2153 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:13,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:13,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:07:13,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:16,027 INFO L124 PetriNetUnfolderBase]: 11001/15492 cut-off events. [2024-06-14 12:07:16,027 INFO L125 PetriNetUnfolderBase]: For 757218/757227 co-relation queries the response was YES. [2024-06-14 12:07:16,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111176 conditions, 15492 events. 11001/15492 cut-off events. For 757218/757227 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 87251 event pairs, 3927 based on Foata normal form. 44/15528 useless extension candidates. Maximal degree in co-relation 111108. Up to 14234 conditions per place. [2024-06-14 12:07:16,240 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 177 selfloop transitions, 85 changer transitions 0/269 dead transitions. [2024-06-14 12:07:16,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 269 transitions, 2890 flow [2024-06-14 12:07:16,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:16,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-14 12:07:16,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-14 12:07:16,242 INFO L175 Difference]: Start difference. First operand has 159 places, 219 transitions, 2153 flow. Second operand 8 states and 214 transitions. [2024-06-14 12:07:16,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 269 transitions, 2890 flow [2024-06-14 12:07:16,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 269 transitions, 2745 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 12:07:16,969 INFO L231 Difference]: Finished difference. Result has 163 places, 222 transitions, 2264 flow [2024-06-14 12:07:16,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2010, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2264, PETRI_PLACES=163, PETRI_TRANSITIONS=222} [2024-06-14 12:07:16,969 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 107 predicate places. [2024-06-14 12:07:16,969 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 222 transitions, 2264 flow [2024-06-14 12:07:16,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:16,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:16,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:16,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:07:16,970 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:16,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:16,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1390356729, now seen corresponding path program 1 times [2024-06-14 12:07:16,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:16,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317646594] [2024-06-14 12:07:16,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:16,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:18,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:18,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317646594] [2024-06-14 12:07:18,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317646594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:18,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:18,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:18,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053223316] [2024-06-14 12:07:18,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:18,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:18,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:18,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:18,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:18,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:07:18,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 222 transitions, 2264 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:18,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:18,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:07:18,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:21,169 INFO L124 PetriNetUnfolderBase]: 11065/15591 cut-off events. [2024-06-14 12:07:21,169 INFO L125 PetriNetUnfolderBase]: For 775194/775194 co-relation queries the response was YES. [2024-06-14 12:07:21,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112901 conditions, 15591 events. 11065/15591 cut-off events. For 775194/775194 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 88131 event pairs, 4105 based on Foata normal form. 8/15591 useless extension candidates. Maximal degree in co-relation 112831. Up to 14871 conditions per place. [2024-06-14 12:07:21,432 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 209 selfloop transitions, 50 changer transitions 0/266 dead transitions. [2024-06-14 12:07:21,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 266 transitions, 2964 flow [2024-06-14 12:07:21,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:21,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:21,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 12:07:21,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-14 12:07:21,434 INFO L175 Difference]: Start difference. First operand has 163 places, 222 transitions, 2264 flow. Second operand 8 states and 207 transitions. [2024-06-14 12:07:21,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 266 transitions, 2964 flow [2024-06-14 12:07:22,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 266 transitions, 2769 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:07:22,529 INFO L231 Difference]: Finished difference. Result has 165 places, 227 transitions, 2269 flow [2024-06-14 12:07:22,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2269, PETRI_PLACES=165, PETRI_TRANSITIONS=227} [2024-06-14 12:07:22,529 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 109 predicate places. [2024-06-14 12:07:22,530 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 227 transitions, 2269 flow [2024-06-14 12:07:22,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:22,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:22,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:22,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:07:22,530 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:22,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:22,531 INFO L85 PathProgramCache]: Analyzing trace with hash -469764863, now seen corresponding path program 2 times [2024-06-14 12:07:22,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:22,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358211037] [2024-06-14 12:07:22,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:22,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:23,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:23,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358211037] [2024-06-14 12:07:23,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358211037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:23,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:23,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:23,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671738538] [2024-06-14 12:07:23,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:23,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:23,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:23,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:23,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:23,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:07:23,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 227 transitions, 2269 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:23,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:23,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:07:23,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:26,674 INFO L124 PetriNetUnfolderBase]: 11221/15823 cut-off events. [2024-06-14 12:07:26,675 INFO L125 PetriNetUnfolderBase]: For 820900/820903 co-relation queries the response was YES. [2024-06-14 12:07:26,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117329 conditions, 15823 events. 11221/15823 cut-off events. For 820900/820903 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 89810 event pairs, 3920 based on Foata normal form. 8/15819 useless extension candidates. Maximal degree in co-relation 117258. Up to 14221 conditions per place. [2024-06-14 12:07:26,965 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 166 selfloop transitions, 113 changer transitions 0/286 dead transitions. [2024-06-14 12:07:26,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 286 transitions, 3511 flow [2024-06-14 12:07:26,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:26,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:26,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-14 12:07:26,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117924528301887 [2024-06-14 12:07:26,981 INFO L175 Difference]: Start difference. First operand has 165 places, 227 transitions, 2269 flow. Second operand 8 states and 217 transitions. [2024-06-14 12:07:26,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 286 transitions, 3511 flow [2024-06-14 12:07:27,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 286 transitions, 3311 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-14 12:07:27,657 INFO L231 Difference]: Finished difference. Result has 167 places, 241 transitions, 2596 flow [2024-06-14 12:07:27,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2596, PETRI_PLACES=167, PETRI_TRANSITIONS=241} [2024-06-14 12:07:27,657 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 111 predicate places. [2024-06-14 12:07:27,657 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 241 transitions, 2596 flow [2024-06-14 12:07:27,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:27,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:27,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:27,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:07:27,658 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:27,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:27,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1402519169, now seen corresponding path program 3 times [2024-06-14 12:07:27,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:27,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801750123] [2024-06-14 12:07:27,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:27,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:28,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:28,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801750123] [2024-06-14 12:07:28,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801750123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:28,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:28,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:28,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322825879] [2024-06-14 12:07:28,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:28,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:28,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:28,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:28,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:28,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:07:28,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 241 transitions, 2596 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:28,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:28,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:07:28,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:32,037 INFO L124 PetriNetUnfolderBase]: 11377/16067 cut-off events. [2024-06-14 12:07:32,037 INFO L125 PetriNetUnfolderBase]: For 890039/890042 co-relation queries the response was YES. [2024-06-14 12:07:32,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124062 conditions, 16067 events. 11377/16067 cut-off events. For 890039/890042 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 91444 event pairs, 3972 based on Foata normal form. 8/16063 useless extension candidates. Maximal degree in co-relation 123989. Up to 14337 conditions per place. [2024-06-14 12:07:32,210 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 168 selfloop transitions, 118 changer transitions 0/293 dead transitions. [2024-06-14 12:07:32,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 293 transitions, 3813 flow [2024-06-14 12:07:32,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:32,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:32,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-14 12:07:32,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023584905660378 [2024-06-14 12:07:32,229 INFO L175 Difference]: Start difference. First operand has 167 places, 241 transitions, 2596 flow. Second operand 8 states and 213 transitions. [2024-06-14 12:07:32,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 293 transitions, 3813 flow [2024-06-14 12:07:33,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 293 transitions, 3636 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-14 12:07:33,023 INFO L231 Difference]: Finished difference. Result has 172 places, 250 transitions, 2850 flow [2024-06-14 12:07:33,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2445, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2850, PETRI_PLACES=172, PETRI_TRANSITIONS=250} [2024-06-14 12:07:33,023 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 116 predicate places. [2024-06-14 12:07:33,024 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 250 transitions, 2850 flow [2024-06-14 12:07:33,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:33,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:33,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:33,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:07:33,024 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:33,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:33,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1213228371, now seen corresponding path program 3 times [2024-06-14 12:07:33,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:33,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802967415] [2024-06-14 12:07:33,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:33,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:34,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:34,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802967415] [2024-06-14 12:07:34,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802967415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:34,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:34,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:34,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193122376] [2024-06-14 12:07:34,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:34,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:34,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:34,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:34,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:34,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:07:34,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 250 transitions, 2850 flow. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:34,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:34,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:07:34,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:37,960 INFO L124 PetriNetUnfolderBase]: 12027/17001 cut-off events. [2024-06-14 12:07:37,960 INFO L125 PetriNetUnfolderBase]: For 962412/962433 co-relation queries the response was YES. [2024-06-14 12:07:38,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131404 conditions, 17001 events. 12027/17001 cut-off events. For 962412/962433 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 97175 event pairs, 4096 based on Foata normal form. 52/17032 useless extension candidates. Maximal degree in co-relation 131329. Up to 15336 conditions per place. [2024-06-14 12:07:38,185 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 221 selfloop transitions, 105 changer transitions 0/333 dead transitions. [2024-06-14 12:07:38,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 333 transitions, 4232 flow [2024-06-14 12:07:38,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:07:38,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:07:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-14 12:07:38,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.469601677148847 [2024-06-14 12:07:38,205 INFO L175 Difference]: Start difference. First operand has 172 places, 250 transitions, 2850 flow. Second operand 9 states and 224 transitions. [2024-06-14 12:07:38,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 333 transitions, 4232 flow [2024-06-14 12:07:39,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 333 transitions, 3998 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 12:07:39,214 INFO L231 Difference]: Finished difference. Result has 182 places, 288 transitions, 3495 flow [2024-06-14 12:07:39,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2645, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3495, PETRI_PLACES=182, PETRI_TRANSITIONS=288} [2024-06-14 12:07:39,216 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 126 predicate places. [2024-06-14 12:07:39,216 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 288 transitions, 3495 flow [2024-06-14 12:07:39,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:39,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:39,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:39,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:07:39,217 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:39,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:39,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1155794019, now seen corresponding path program 4 times [2024-06-14 12:07:39,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:39,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444488198] [2024-06-14 12:07:39,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:39,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:40,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:40,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444488198] [2024-06-14 12:07:40,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444488198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:40,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:40,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:40,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423045185] [2024-06-14 12:07:40,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:40,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:40,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:40,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:40,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:40,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:07:40,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 288 transitions, 3495 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:40,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:40,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:07:40,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:44,343 INFO L124 PetriNetUnfolderBase]: 13295/18803 cut-off events. [2024-06-14 12:07:44,344 INFO L125 PetriNetUnfolderBase]: For 1039603/1039614 co-relation queries the response was YES. [2024-06-14 12:07:44,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146234 conditions, 18803 events. 13295/18803 cut-off events. For 1039603/1039614 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 109021 event pairs, 3826 based on Foata normal form. 46/18841 useless extension candidates. Maximal degree in co-relation 146153. Up to 16315 conditions per place. [2024-06-14 12:07:44,620 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 247 selfloop transitions, 185 changer transitions 0/439 dead transitions. [2024-06-14 12:07:44,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 439 transitions, 6027 flow [2024-06-14 12:07:44,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:07:44,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:07:44,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-14 12:07:44,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968553459119497 [2024-06-14 12:07:44,622 INFO L175 Difference]: Start difference. First operand has 182 places, 288 transitions, 3495 flow. Second operand 9 states and 237 transitions. [2024-06-14 12:07:44,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 439 transitions, 6027 flow [2024-06-14 12:07:45,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 439 transitions, 5801 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-14 12:07:45,945 INFO L231 Difference]: Finished difference. Result has 193 places, 373 transitions, 5143 flow [2024-06-14 12:07:45,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3371, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5143, PETRI_PLACES=193, PETRI_TRANSITIONS=373} [2024-06-14 12:07:45,946 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 137 predicate places. [2024-06-14 12:07:45,946 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 373 transitions, 5143 flow [2024-06-14 12:07:45,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:45,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:45,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:45,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:07:45,947 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:45,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:45,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1212858975, now seen corresponding path program 1 times [2024-06-14 12:07:45,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:45,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981571335] [2024-06-14 12:07:45,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:45,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:47,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:47,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981571335] [2024-06-14 12:07:47,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981571335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:47,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:47,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:47,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412604046] [2024-06-14 12:07:47,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:47,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:47,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:47,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:47,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:47,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:07:47,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 373 transitions, 5143 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:47,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:47,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:07:47,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand