./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix055.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/mix055.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix055.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix055.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-76401ed-m [2024-06-20 16:31:02,299 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:31:02,362 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:31:02,367 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:31:02,367 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:31:02,397 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:31:02,397 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:31:02,398 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:31:02,398 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:31:02,401 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:31:02,401 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:31:02,401 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:31:02,402 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:31:02,403 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:31:02,403 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:31:02,403 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:31:02,403 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:31:02,404 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:31:02,404 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:31:02,404 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:31:02,404 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:31:02,405 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:31:02,405 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:31:02,405 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:31:02,405 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:31:02,405 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:31:02,405 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:31:02,405 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:31:02,406 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:31:02,406 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:31:02,407 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:31:02,407 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:31:02,407 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:31:02,407 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:31:02,407 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:31:02,407 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:31:02,408 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:31:02,409 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:31:02,409 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:31:02,409 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:31:02,409 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:31:02,409 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:31:02,409 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:31:02,409 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:31:02,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:31:02,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:31:02,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:31:02,654 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:31:02,654 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:31:02,655 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix055.opt.i [2024-06-20 16:31:03,722 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:31:03,968 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:31:03,969 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix055.opt.i [2024-06-20 16:31:03,994 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/730513a73/9f1088ce0dbe4114969293d63561d734/FLAG786f53c0a [2024-06-20 16:31:04,004 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/730513a73/9f1088ce0dbe4114969293d63561d734 [2024-06-20 16:31:04,006 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:31:04,007 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:31:04,007 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix055.opt.yml/witness.yml [2024-06-20 16:31:04,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:31:04,194 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:31:04,195 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:31:04,195 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:31:04,199 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:31:04,200 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:31:04" (1/2) ... [2024-06-20 16:31:04,200 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7343583f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:31:04, skipping insertion in model container [2024-06-20 16:31:04,201 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:31:04" (1/2) ... [2024-06-20 16:31:04,202 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@19a7d977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:31:04, skipping insertion in model container [2024-06-20 16:31:04,202 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:31:04" (2/2) ... [2024-06-20 16:31:04,203 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7343583f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:04, skipping insertion in model container [2024-06-20 16:31:04,203 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:31:04" (2/2) ... [2024-06-20 16:31:04,203 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:31:04,361 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:31:04,363 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] ((((((((((((((((((((! multithreaded || z$flush_delayed == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0) [2024-06-20 16:31:04,363 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ((((((((((((((((((((! multithreaded || z$flush_delayed == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0) [2024-06-20 16:31:04,363 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ((((((((((((((((((((! multithreaded || z$flush_delayed == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0) [2024-06-20 16:31:04,363 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((((! multithreaded || z$flush_delayed == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0) [2024-06-20 16:31:04,363 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:31:04,364 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-20 16:31:04,400 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:31:04,694 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:31:04,707 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:31:04,860 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:31:04,902 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:31:04,902 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:04 WrapperNode [2024-06-20 16:31:04,903 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:31:04,904 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:31:04,904 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:31:04,904 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:31:04,910 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:04" (1/1) ... [2024-06-20 16:31:04,925 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:04" (1/1) ... [2024-06-20 16:31:04,963 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 156 [2024-06-20 16:31:04,964 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:31:04,964 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:31:04,964 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:31:04,965 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:31:04,973 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:04" (1/1) ... [2024-06-20 16:31:04,974 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:04" (1/1) ... [2024-06-20 16:31:04,986 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:04" (1/1) ... [2024-06-20 16:31:05,008 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 16:31:05,009 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:04" (1/1) ... [2024-06-20 16:31:05,009 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:04" (1/1) ... [2024-06-20 16:31:05,024 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:04" (1/1) ... [2024-06-20 16:31:05,026 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:04" (1/1) ... [2024-06-20 16:31:05,027 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:04" (1/1) ... [2024-06-20 16:31:05,029 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:04" (1/1) ... [2024-06-20 16:31:05,050 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:31:05,051 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:31:05,051 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:31:05,051 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:31:05,052 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:04" (1/1) ... [2024-06-20 16:31:05,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:31:05,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:31:05,075 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 16:31:05,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 16:31:05,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:31:05,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:31:05,128 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:31:05,129 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:31:05,129 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:31:05,129 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:31:05,130 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:31:05,130 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:31:05,130 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 16:31:05,130 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 16:31:05,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:31:05,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:31:05,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:31:05,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:31:05,133 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:31:05,273 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:31:05,275 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:31:05,607 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:31:05,608 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:31:05,756 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:31:05,757 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:31:05,757 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:31:05 BoogieIcfgContainer [2024-06-20 16:31:05,757 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:31:05,759 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:31:05,759 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:31:05,761 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:31:05,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:31:04" (1/4) ... [2024-06-20 16:31:05,762 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d2d91c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:31:05, skipping insertion in model container [2024-06-20 16:31:05,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:31:04" (2/4) ... [2024-06-20 16:31:05,762 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d2d91c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:31:05, skipping insertion in model container [2024-06-20 16:31:05,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:31:04" (3/4) ... [2024-06-20 16:31:05,762 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d2d91c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:31:05, skipping insertion in model container [2024-06-20 16:31:05,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:31:05" (4/4) ... [2024-06-20 16:31:05,763 INFO L112 eAbstractionObserver]: Analyzing ICFG mix055.opt.i [2024-06-20 16:31:05,777 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:31:05,778 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 16:31:05,778 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:31:05,815 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:31:05,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-20 16:31:05,869 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-20 16:31:05,869 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:31:05,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:31:05,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-20 16:31:05,876 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-20 16:31:05,912 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:31:05,945 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;@41e33a63, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:31:05,946 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 16:31:05,951 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:31:05,951 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:31:05,951 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:31:05,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:05,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:31:05,953 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)] === [2024-06-20 16:31:05,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:05,958 INFO L85 PathProgramCache]: Analyzing trace with hash 381650207, now seen corresponding path program 1 times [2024-06-20 16:31:05,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:05,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895900618] [2024-06-20 16:31:05,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:05,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:07,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:07,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895900618] [2024-06-20 16:31:07,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895900618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:07,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:07,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:31:07,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327544952] [2024-06-20 16:31:07,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:07,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:31:07,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:07,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:31:07,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:31:07,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-20 16:31:07,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:07,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:07,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-20 16:31:07,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:08,258 INFO L124 PetriNetUnfolderBase]: 6405/9062 cut-off events. [2024-06-20 16:31:08,259 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2024-06-20 16:31:08,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18142 conditions, 9062 events. 6405/9062 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 50644 event pairs, 4800 based on Foata normal form. 1/8896 useless extension candidates. Maximal degree in co-relation 18129. Up to 8771 conditions per place. [2024-06-20 16:31:08,317 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 41 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-20 16:31:08,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 223 flow [2024-06-20 16:31:08,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:31:08,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:31:08,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-06-20 16:31:08,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6209150326797386 [2024-06-20 16:31:08,328 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 95 transitions. [2024-06-20 16:31:08,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 223 flow [2024-06-20 16:31:08,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 16:31:08,333 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-20 16:31:08,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-20 16:31:08,337 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-20 16:31:08,337 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-20 16:31:08,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:08,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:08,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:08,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:31:08,338 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)] === [2024-06-20 16:31:08,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:08,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1693662526, now seen corresponding path program 1 times [2024-06-20 16:31:08,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:08,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043739066] [2024-06-20 16:31:08,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:08,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:09,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:09,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043739066] [2024-06-20 16:31:09,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043739066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:09,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:09,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:31:09,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774809902] [2024-06-20 16:31:09,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:09,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:31:09,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:09,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:31:09,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:31:09,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-20 16:31:09,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:09,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:09,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-20 16:31:09,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:10,172 INFO L124 PetriNetUnfolderBase]: 7493/10322 cut-off events. [2024-06-20 16:31:10,172 INFO L125 PetriNetUnfolderBase]: For 2084/2084 co-relation queries the response was YES. [2024-06-20 16:31:10,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23740 conditions, 10322 events. 7493/10322 cut-off events. For 2084/2084 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 55776 event pairs, 5002 based on Foata normal form. 4/10307 useless extension candidates. Maximal degree in co-relation 23728. Up to 10194 conditions per place. [2024-06-20 16:31:10,235 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 52 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-20 16:31:10,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 317 flow [2024-06-20 16:31:10,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:31:10,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:31:10,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-20 16:31:10,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5931372549019608 [2024-06-20 16:31:10,239 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 121 transitions. [2024-06-20 16:31:10,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 317 flow [2024-06-20 16:31:10,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:31:10,243 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 177 flow [2024-06-20 16:31:10,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-20 16:31:10,244 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-06-20 16:31:10,245 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 177 flow [2024-06-20 16:31:10,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:10,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:10,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:10,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:31:10,248 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)] === [2024-06-20 16:31:10,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:10,253 INFO L85 PathProgramCache]: Analyzing trace with hash 963931870, now seen corresponding path program 1 times [2024-06-20 16:31:10,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:10,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206325050] [2024-06-20 16:31:10,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:10,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:11,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:11,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:11,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206325050] [2024-06-20 16:31:11,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206325050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:11,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:11,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:31:11,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987619426] [2024-06-20 16:31:11,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:11,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:31:11,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:11,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:31:11,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:31:11,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-20 16:31:11,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:11,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:11,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-20 16:31:11,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:12,172 INFO L124 PetriNetUnfolderBase]: 7511/10346 cut-off events. [2024-06-20 16:31:12,172 INFO L125 PetriNetUnfolderBase]: For 5962/5962 co-relation queries the response was YES. [2024-06-20 16:31:12,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26675 conditions, 10346 events. 7511/10346 cut-off events. For 5962/5962 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 55986 event pairs, 3766 based on Foata normal form. 7/10332 useless extension candidates. Maximal degree in co-relation 26661. Up to 10115 conditions per place. [2024-06-20 16:31:12,219 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 70 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-20 16:31:12,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 99 transitions, 533 flow [2024-06-20 16:31:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:31:12,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:31:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-20 16:31:12,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6235294117647059 [2024-06-20 16:31:12,221 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 177 flow. Second operand 5 states and 159 transitions. [2024-06-20 16:31:12,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 99 transitions, 533 flow [2024-06-20 16:31:12,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 514 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 16:31:12,225 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 308 flow [2024-06-20 16:31:12,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-06-20 16:31:12,225 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-20 16:31:12,225 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 308 flow [2024-06-20 16:31:12,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:12,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:12,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:12,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:31:12,226 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)] === [2024-06-20 16:31:12,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:12,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1376156069, now seen corresponding path program 1 times [2024-06-20 16:31:12,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:12,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243371858] [2024-06-20 16:31:12,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:12,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:12,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:12,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243371858] [2024-06-20 16:31:12,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243371858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:12,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:12,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:31:12,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896500116] [2024-06-20 16:31:12,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:12,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:31:12,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:12,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:31:12,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:31:12,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-20 16:31:12,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:12,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:12,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-20 16:31:12,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:14,049 INFO L124 PetriNetUnfolderBase]: 7653/10568 cut-off events. [2024-06-20 16:31:14,049 INFO L125 PetriNetUnfolderBase]: For 14677/14696 co-relation queries the response was YES. [2024-06-20 16:31:14,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32155 conditions, 10568 events. 7653/10568 cut-off events. For 14677/14696 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 57340 event pairs, 2959 based on Foata normal form. 48/10595 useless extension candidates. Maximal degree in co-relation 32138. Up to 10107 conditions per place. [2024-06-20 16:31:14,110 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 80 selfloop transitions, 24 changer transitions 0/112 dead transitions. [2024-06-20 16:31:14,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 112 transitions, 688 flow [2024-06-20 16:31:14,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:31:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:31:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-20 16:31:14,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-06-20 16:31:14,112 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 308 flow. Second operand 6 states and 186 transitions. [2024-06-20 16:31:14,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 112 transitions, 688 flow [2024-06-20 16:31:14,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 112 transitions, 676 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-20 16:31:14,120 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 377 flow [2024-06-20 16:31:14,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=377, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-20 16:31:14,120 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2024-06-20 16:31:14,121 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 377 flow [2024-06-20 16:31:14,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:14,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:14,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:14,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:31:14,122 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)] === [2024-06-20 16:31:14,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:14,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1949603560, now seen corresponding path program 1 times [2024-06-20 16:31:14,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:14,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769261403] [2024-06-20 16:31:14,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:14,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:14,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:14,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769261403] [2024-06-20 16:31:14,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769261403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:14,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:14,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:31:14,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017895086] [2024-06-20 16:31:14,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:14,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:31:14,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:14,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:31:14,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:31:14,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:31:14,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 377 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:14,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:14,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:31:14,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:15,969 INFO L124 PetriNetUnfolderBase]: 6546/9312 cut-off events. [2024-06-20 16:31:15,970 INFO L125 PetriNetUnfolderBase]: For 18288/18316 co-relation queries the response was YES. [2024-06-20 16:31:15,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30405 conditions, 9312 events. 6546/9312 cut-off events. For 18288/18316 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 52358 event pairs, 3025 based on Foata normal form. 3/9299 useless extension candidates. Maximal degree in co-relation 30384. Up to 8977 conditions per place. [2024-06-20 16:31:16,019 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 64 selfloop transitions, 10 changer transitions 0/82 dead transitions. [2024-06-20 16:31:16,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 569 flow [2024-06-20 16:31:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:31:16,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:31:16,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-20 16:31:16,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-20 16:31:16,021 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 377 flow. Second operand 5 states and 125 transitions. [2024-06-20 16:31:16,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 569 flow [2024-06-20 16:31:16,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 82 transitions, 508 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 16:31:16,028 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 347 flow [2024-06-20 16:31:16,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-20 16:31:16,028 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2024-06-20 16:31:16,029 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 347 flow [2024-06-20 16:31:16,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:16,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:16,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:16,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:31:16,029 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)] === [2024-06-20 16:31:16,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:16,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1799219115, now seen corresponding path program 1 times [2024-06-20 16:31:16,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:16,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935351695] [2024-06-20 16:31:16,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:16,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:16,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:16,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935351695] [2024-06-20 16:31:16,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935351695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:16,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:16,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:31:16,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501123582] [2024-06-20 16:31:16,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:16,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:31:16,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:16,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:31:16,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:31:16,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:31:16,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:16,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:16,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:31:16,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:18,121 INFO L124 PetriNetUnfolderBase]: 7657/10574 cut-off events. [2024-06-20 16:31:18,122 INFO L125 PetriNetUnfolderBase]: For 24864/24884 co-relation queries the response was YES. [2024-06-20 16:31:18,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35121 conditions, 10574 events. 7657/10574 cut-off events. For 24864/24884 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 57427 event pairs, 3614 based on Foata normal form. 24/10584 useless extension candidates. Maximal degree in co-relation 35098. Up to 10337 conditions per place. [2024-06-20 16:31:18,179 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 67 selfloop transitions, 25 changer transitions 0/99 dead transitions. [2024-06-20 16:31:18,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 99 transitions, 668 flow [2024-06-20 16:31:18,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:31:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:31:18,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-20 16:31:18,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032679738562091 [2024-06-20 16:31:18,180 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 347 flow. Second operand 6 states and 154 transitions. [2024-06-20 16:31:18,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 99 transitions, 668 flow [2024-06-20 16:31:18,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 639 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 16:31:18,188 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 414 flow [2024-06-20 16:31:18,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=414, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-20 16:31:18,189 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2024-06-20 16:31:18,189 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 414 flow [2024-06-20 16:31:18,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:18,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:18,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:18,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:31:18,190 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)] === [2024-06-20 16:31:18,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:18,191 INFO L85 PathProgramCache]: Analyzing trace with hash -963230025, now seen corresponding path program 2 times [2024-06-20 16:31:18,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:18,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199326508] [2024-06-20 16:31:18,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:18,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:19,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:19,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199326508] [2024-06-20 16:31:19,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199326508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:19,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:19,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:31:19,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549265666] [2024-06-20 16:31:19,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:19,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:31:19,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:19,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:31:19,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:31:19,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:31:19,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 414 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:19,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:19,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:31:19,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:20,230 INFO L124 PetriNetUnfolderBase]: 7612/10501 cut-off events. [2024-06-20 16:31:20,230 INFO L125 PetriNetUnfolderBase]: For 29616/29644 co-relation queries the response was YES. [2024-06-20 16:31:20,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35847 conditions, 10501 events. 7612/10501 cut-off events. For 29616/29644 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 56667 event pairs, 3628 based on Foata normal form. 24/10505 useless extension candidates. Maximal degree in co-relation 35824. Up to 10268 conditions per place. [2024-06-20 16:31:20,298 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 60 selfloop transitions, 26 changer transitions 0/93 dead transitions. [2024-06-20 16:31:20,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 648 flow [2024-06-20 16:31:20,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:31:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:31:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 16:31:20,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869281045751634 [2024-06-20 16:31:20,300 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 414 flow. Second operand 6 states and 149 transitions. [2024-06-20 16:31:20,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 648 flow [2024-06-20 16:31:20,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 605 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:31:20,311 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 434 flow [2024-06-20 16:31:20,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=434, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2024-06-20 16:31:20,312 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 18 predicate places. [2024-06-20 16:31:20,312 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 434 flow [2024-06-20 16:31:20,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:20,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:20,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:20,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:31:20,313 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)] === [2024-06-20 16:31:20,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:20,313 INFO L85 PathProgramCache]: Analyzing trace with hash 236161693, now seen corresponding path program 1 times [2024-06-20 16:31:20,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:20,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272712462] [2024-06-20 16:31:20,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:20,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:21,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:21,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272712462] [2024-06-20 16:31:21,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272712462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:21,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:21,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:31:21,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531075602] [2024-06-20 16:31:21,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:21,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:31:21,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:21,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:31:21,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:31:21,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:31:21,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 434 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:21,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:21,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:31:21,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:22,823 INFO L124 PetriNetUnfolderBase]: 8299/11564 cut-off events. [2024-06-20 16:31:22,823 INFO L125 PetriNetUnfolderBase]: For 36466/36466 co-relation queries the response was YES. [2024-06-20 16:31:22,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39574 conditions, 11564 events. 8299/11564 cut-off events. For 36466/36466 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 62715 event pairs, 3868 based on Foata normal form. 6/11566 useless extension candidates. Maximal degree in co-relation 39550. Up to 11267 conditions per place. [2024-06-20 16:31:22,894 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 84 selfloop transitions, 17 changer transitions 0/108 dead transitions. [2024-06-20 16:31:22,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 108 transitions, 773 flow [2024-06-20 16:31:22,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:31:22,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:31:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-20 16:31:22,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4677871148459384 [2024-06-20 16:31:22,896 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 434 flow. Second operand 7 states and 167 transitions. [2024-06-20 16:31:22,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 108 transitions, 773 flow [2024-06-20 16:31:22,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 108 transitions, 682 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:31:22,923 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 455 flow [2024-06-20 16:31:22,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=455, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-20 16:31:22,923 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2024-06-20 16:31:22,923 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 455 flow [2024-06-20 16:31:22,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:22,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:22,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:22,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:31:22,924 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)] === [2024-06-20 16:31:22,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:22,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1004982215, now seen corresponding path program 1 times [2024-06-20 16:31:22,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:22,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032809962] [2024-06-20 16:31:22,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:22,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:23,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:23,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032809962] [2024-06-20 16:31:23,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032809962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:23,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:23,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:31:23,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400456195] [2024-06-20 16:31:23,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:23,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:31:23,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:23,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:31:23,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:31:23,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:31:23,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 455 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:23,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:23,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:31:23,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:24,998 INFO L124 PetriNetUnfolderBase]: 8292/11709 cut-off events. [2024-06-20 16:31:24,999 INFO L125 PetriNetUnfolderBase]: For 44584/44584 co-relation queries the response was YES. [2024-06-20 16:31:25,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42299 conditions, 11709 events. 8292/11709 cut-off events. For 44584/44584 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 64544 event pairs, 3960 based on Foata normal form. 2/11707 useless extension candidates. Maximal degree in co-relation 42273. Up to 11309 conditions per place. [2024-06-20 16:31:25,072 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 77 selfloop transitions, 10 changer transitions 0/94 dead transitions. [2024-06-20 16:31:25,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 94 transitions, 697 flow [2024-06-20 16:31:25,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:31:25,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:31:25,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-20 16:31:25,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2024-06-20 16:31:25,073 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 455 flow. Second operand 5 states and 117 transitions. [2024-06-20 16:31:25,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 94 transitions, 697 flow [2024-06-20 16:31:25,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 94 transitions, 649 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 16:31:25,099 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 476 flow [2024-06-20 16:31:25,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=476, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-20 16:31:25,100 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 21 predicate places. [2024-06-20 16:31:25,100 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 476 flow [2024-06-20 16:31:25,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:25,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:25,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:25,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:31:25,101 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:31:25,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:25,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1139724235, now seen corresponding path program 1 times [2024-06-20 16:31:25,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:25,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48639564] [2024-06-20 16:31:25,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:25,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:26,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:26,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48639564] [2024-06-20 16:31:26,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48639564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:26,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:26,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:31:26,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634109104] [2024-06-20 16:31:26,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:26,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:31:26,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:26,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:31:26,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:31:26,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:31:26,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 476 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:26,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:26,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:31:26,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:27,385 INFO L124 PetriNetUnfolderBase]: 8278/11825 cut-off events. [2024-06-20 16:31:27,385 INFO L125 PetriNetUnfolderBase]: For 55845/55845 co-relation queries the response was YES. [2024-06-20 16:31:27,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45004 conditions, 11825 events. 8278/11825 cut-off events. For 55845/55845 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 66169 event pairs, 3930 based on Foata normal form. 4/11825 useless extension candidates. Maximal degree in co-relation 44977. Up to 11273 conditions per place. [2024-06-20 16:31:27,444 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 82 selfloop transitions, 14 changer transitions 0/103 dead transitions. [2024-06-20 16:31:27,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 103 transitions, 754 flow [2024-06-20 16:31:27,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:31:27,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:31:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-20 16:31:27,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2024-06-20 16:31:27,446 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 476 flow. Second operand 6 states and 138 transitions. [2024-06-20 16:31:27,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 103 transitions, 754 flow [2024-06-20 16:31:27,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 103 transitions, 715 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 16:31:27,469 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 520 flow [2024-06-20 16:31:27,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=520, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2024-06-20 16:31:27,469 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 24 predicate places. [2024-06-20 16:31:27,469 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 520 flow [2024-06-20 16:31:27,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:27,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:27,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:27,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:31:27,470 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)] === [2024-06-20 16:31:27,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:27,471 INFO L85 PathProgramCache]: Analyzing trace with hash 538666626, now seen corresponding path program 1 times [2024-06-20 16:31:27,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:27,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510237419] [2024-06-20 16:31:27,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:27,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:28,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:28,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510237419] [2024-06-20 16:31:28,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510237419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:28,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:28,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:31:28,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265967697] [2024-06-20 16:31:28,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:28,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:31:28,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:28,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:31:28,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:31:28,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:31:28,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 520 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:28,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:28,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:31:28,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:30,022 INFO L124 PetriNetUnfolderBase]: 9647/13329 cut-off events. [2024-06-20 16:31:30,023 INFO L125 PetriNetUnfolderBase]: For 86379/86471 co-relation queries the response was YES. [2024-06-20 16:31:30,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55105 conditions, 13329 events. 9647/13329 cut-off events. For 86379/86471 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 73468 event pairs, 3819 based on Foata normal form. 54/13372 useless extension candidates. Maximal degree in co-relation 55077. Up to 12454 conditions per place. [2024-06-20 16:31:30,108 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 93 selfloop transitions, 32 changer transitions 0/133 dead transitions. [2024-06-20 16:31:30,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 133 transitions, 1002 flow [2024-06-20 16:31:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:31:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:31:30,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 16:31:30,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2024-06-20 16:31:30,110 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 520 flow. Second operand 7 states and 181 transitions. [2024-06-20 16:31:30,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 133 transitions, 1002 flow [2024-06-20 16:31:30,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 133 transitions, 949 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 16:31:30,133 INFO L231 Difference]: Finished difference. Result has 81 places, 88 transitions, 600 flow [2024-06-20 16:31:30,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=600, PETRI_PLACES=81, PETRI_TRANSITIONS=88} [2024-06-20 16:31:30,134 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 27 predicate places. [2024-06-20 16:31:30,134 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 88 transitions, 600 flow [2024-06-20 16:31:30,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:30,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:30,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:30,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:31:30,135 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:31:30,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:30,135 INFO L85 PathProgramCache]: Analyzing trace with hash 538727076, now seen corresponding path program 2 times [2024-06-20 16:31:30,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:30,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470375866] [2024-06-20 16:31:30,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:30,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:31,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:31,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470375866] [2024-06-20 16:31:31,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470375866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:31,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:31,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:31:31,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114719444] [2024-06-20 16:31:31,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:31,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:31:31,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:31,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:31:31,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:31:31,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:31:31,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 88 transitions, 600 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:31,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:31,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:31:31,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:32,723 INFO L124 PetriNetUnfolderBase]: 9760/13508 cut-off events. [2024-06-20 16:31:32,723 INFO L125 PetriNetUnfolderBase]: For 103050/103142 co-relation queries the response was YES. [2024-06-20 16:31:32,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57911 conditions, 13508 events. 9760/13508 cut-off events. For 103050/103142 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 74469 event pairs, 4384 based on Foata normal form. 87/13574 useless extension candidates. Maximal degree in co-relation 57882. Up to 13026 conditions per place. [2024-06-20 16:31:32,794 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 90 selfloop transitions, 31 changer transitions 0/129 dead transitions. [2024-06-20 16:31:32,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 129 transitions, 980 flow [2024-06-20 16:31:32,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:31:32,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:31:32,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 16:31:32,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4957983193277311 [2024-06-20 16:31:32,796 INFO L175 Difference]: Start difference. First operand has 81 places, 88 transitions, 600 flow. Second operand 7 states and 177 transitions. [2024-06-20 16:31:32,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 129 transitions, 980 flow [2024-06-20 16:31:32,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 129 transitions, 931 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-20 16:31:32,833 INFO L231 Difference]: Finished difference. Result has 85 places, 91 transitions, 668 flow [2024-06-20 16:31:32,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=668, PETRI_PLACES=85, PETRI_TRANSITIONS=91} [2024-06-20 16:31:32,834 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 31 predicate places. [2024-06-20 16:31:32,834 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 91 transitions, 668 flow [2024-06-20 16:31:32,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:32,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:32,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:32,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:31:32,834 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:31:32,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:32,835 INFO L85 PathProgramCache]: Analyzing trace with hash -983152376, now seen corresponding path program 1 times [2024-06-20 16:31:32,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:32,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286683994] [2024-06-20 16:31:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:32,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:33,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:33,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286683994] [2024-06-20 16:31:33,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286683994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:33,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:33,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:31:33,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050691765] [2024-06-20 16:31:33,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:33,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:31:33,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:33,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:31:33,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:31:33,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:33,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 91 transitions, 668 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:33,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:33,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:33,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:35,473 INFO L124 PetriNetUnfolderBase]: 10097/13918 cut-off events. [2024-06-20 16:31:35,473 INFO L125 PetriNetUnfolderBase]: For 116458/116464 co-relation queries the response was YES. [2024-06-20 16:31:35,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61442 conditions, 13918 events. 10097/13918 cut-off events. For 116458/116464 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 74711 event pairs, 4586 based on Foata normal form. 6/13919 useless extension candidates. Maximal degree in co-relation 61411. Up to 13728 conditions per place. [2024-06-20 16:31:35,573 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 98 selfloop transitions, 21 changer transitions 0/125 dead transitions. [2024-06-20 16:31:35,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 125 transitions, 1108 flow [2024-06-20 16:31:35,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:31:35,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:31:35,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-20 16:31:35,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46405228758169936 [2024-06-20 16:31:35,575 INFO L175 Difference]: Start difference. First operand has 85 places, 91 transitions, 668 flow. Second operand 6 states and 142 transitions. [2024-06-20 16:31:35,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 125 transitions, 1108 flow [2024-06-20 16:31:35,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 125 transitions, 1027 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 16:31:35,650 INFO L231 Difference]: Finished difference. Result has 86 places, 99 transitions, 734 flow [2024-06-20 16:31:35,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=734, PETRI_PLACES=86, PETRI_TRANSITIONS=99} [2024-06-20 16:31:35,650 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 32 predicate places. [2024-06-20 16:31:35,650 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 99 transitions, 734 flow [2024-06-20 16:31:35,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:35,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:35,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:35,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:31:35,651 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)] === [2024-06-20 16:31:35,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:35,652 INFO L85 PathProgramCache]: Analyzing trace with hash 822638588, now seen corresponding path program 1 times [2024-06-20 16:31:35,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:35,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545154541] [2024-06-20 16:31:35,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:35,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:36,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:36,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545154541] [2024-06-20 16:31:36,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545154541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:36,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:36,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:31:36,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578328031] [2024-06-20 16:31:36,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:36,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:31:36,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:36,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:31:36,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:31:36,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:36,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 99 transitions, 734 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:36,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:36,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:36,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:38,623 INFO L124 PetriNetUnfolderBase]: 10155/13971 cut-off events. [2024-06-20 16:31:38,623 INFO L125 PetriNetUnfolderBase]: For 136978/136987 co-relation queries the response was YES. [2024-06-20 16:31:38,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64457 conditions, 13971 events. 10155/13971 cut-off events. For 136978/136987 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 74725 event pairs, 4326 based on Foata normal form. 8/13963 useless extension candidates. Maximal degree in co-relation 64425. Up to 13591 conditions per place. [2024-06-20 16:31:38,732 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 105 selfloop transitions, 37 changer transitions 0/148 dead transitions. [2024-06-20 16:31:38,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 148 transitions, 1204 flow [2024-06-20 16:31:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:31:38,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:31:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 16:31:38,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681372549019608 [2024-06-20 16:31:38,735 INFO L175 Difference]: Start difference. First operand has 86 places, 99 transitions, 734 flow. Second operand 8 states and 191 transitions. [2024-06-20 16:31:38,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 148 transitions, 1204 flow [2024-06-20 16:31:38,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 148 transitions, 1158 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-20 16:31:38,814 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 865 flow [2024-06-20 16:31:38,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=865, PETRI_PLACES=93, PETRI_TRANSITIONS=107} [2024-06-20 16:31:38,815 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 39 predicate places. [2024-06-20 16:31:38,815 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 865 flow [2024-06-20 16:31:38,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:38,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:38,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:38,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:31:38,815 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)] === [2024-06-20 16:31:38,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:38,816 INFO L85 PathProgramCache]: Analyzing trace with hash -682126306, now seen corresponding path program 2 times [2024-06-20 16:31:38,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:38,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554564892] [2024-06-20 16:31:38,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:38,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:39,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:39,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554564892] [2024-06-20 16:31:39,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554564892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:39,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:39,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:31:39,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781875400] [2024-06-20 16:31:39,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:39,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:31:39,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:39,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:31:39,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:31:39,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:39,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 107 transitions, 865 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:39,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:39,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:39,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:41,627 INFO L124 PetriNetUnfolderBase]: 10140/13950 cut-off events. [2024-06-20 16:31:41,628 INFO L125 PetriNetUnfolderBase]: For 155483/155492 co-relation queries the response was YES. [2024-06-20 16:31:41,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67056 conditions, 13950 events. 10140/13950 cut-off events. For 155483/155492 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 74592 event pairs, 4323 based on Foata normal form. 8/13942 useless extension candidates. Maximal degree in co-relation 67021. Up to 13570 conditions per place. [2024-06-20 16:31:41,728 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 107 selfloop transitions, 45 changer transitions 0/158 dead transitions. [2024-06-20 16:31:41,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 158 transitions, 1401 flow [2024-06-20 16:31:41,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:31:41,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:31:41,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 16:31:41,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681372549019608 [2024-06-20 16:31:41,730 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 865 flow. Second operand 8 states and 191 transitions. [2024-06-20 16:31:41,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 158 transitions, 1401 flow [2024-06-20 16:31:41,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 158 transitions, 1281 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 16:31:41,825 INFO L231 Difference]: Finished difference. Result has 97 places, 118 transitions, 994 flow [2024-06-20 16:31:41,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=994, PETRI_PLACES=97, PETRI_TRANSITIONS=118} [2024-06-20 16:31:41,825 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2024-06-20 16:31:41,825 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 118 transitions, 994 flow [2024-06-20 16:31:41,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:41,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:41,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:41,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:31:41,826 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:31:41,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:41,826 INFO L85 PathProgramCache]: Analyzing trace with hash -560293674, now seen corresponding path program 3 times [2024-06-20 16:31:41,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:41,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159941343] [2024-06-20 16:31:41,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:41,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:42,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:42,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159941343] [2024-06-20 16:31:42,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159941343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:42,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:42,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:31:42,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734351404] [2024-06-20 16:31:42,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:42,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:31:42,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:42,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:31:42,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:31:42,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:42,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 118 transitions, 994 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:42,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:42,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:42,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:44,619 INFO L124 PetriNetUnfolderBase]: 10217/14085 cut-off events. [2024-06-20 16:31:44,619 INFO L125 PetriNetUnfolderBase]: For 174923/174932 co-relation queries the response was YES. [2024-06-20 16:31:44,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69715 conditions, 14085 events. 10217/14085 cut-off events. For 174923/174932 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 75696 event pairs, 3889 based on Foata normal form. 8/14077 useless extension candidates. Maximal degree in co-relation 69678. Up to 13409 conditions per place. [2024-06-20 16:31:44,736 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 105 selfloop transitions, 56 changer transitions 0/167 dead transitions. [2024-06-20 16:31:44,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 167 transitions, 1500 flow [2024-06-20 16:31:44,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:31:44,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:31:44,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 16:31:44,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47794117647058826 [2024-06-20 16:31:44,738 INFO L175 Difference]: Start difference. First operand has 97 places, 118 transitions, 994 flow. Second operand 8 states and 195 transitions. [2024-06-20 16:31:44,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 167 transitions, 1500 flow [2024-06-20 16:31:44,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 167 transitions, 1404 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-20 16:31:44,897 INFO L231 Difference]: Finished difference. Result has 103 places, 123 transitions, 1113 flow [2024-06-20 16:31:44,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1113, PETRI_PLACES=103, PETRI_TRANSITIONS=123} [2024-06-20 16:31:44,899 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2024-06-20 16:31:44,899 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 123 transitions, 1113 flow [2024-06-20 16:31:44,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:44,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:44,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:44,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:31:44,902 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)] === [2024-06-20 16:31:44,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:44,902 INFO L85 PathProgramCache]: Analyzing trace with hash -971724536, now seen corresponding path program 2 times [2024-06-20 16:31:44,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:44,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477368229] [2024-06-20 16:31:44,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:44,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:45,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:45,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477368229] [2024-06-20 16:31:45,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477368229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:45,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:45,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:31:45,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036700989] [2024-06-20 16:31:45,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:45,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:31:45,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:45,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:31:45,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:31:45,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:45,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 123 transitions, 1113 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:45,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:45,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:45,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:47,434 INFO L124 PetriNetUnfolderBase]: 10210/14091 cut-off events. [2024-06-20 16:31:47,435 INFO L125 PetriNetUnfolderBase]: For 195560/195575 co-relation queries the response was YES. [2024-06-20 16:31:47,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71728 conditions, 14091 events. 10210/14091 cut-off events. For 195560/195575 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 75736 event pairs, 4314 based on Foata normal form. 12/14096 useless extension candidates. Maximal degree in co-relation 71689. Up to 13901 conditions per place. [2024-06-20 16:31:47,556 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 114 selfloop transitions, 21 changer transitions 0/141 dead transitions. [2024-06-20 16:31:47,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 141 transitions, 1429 flow [2024-06-20 16:31:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:31:47,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:31:47,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-20 16:31:47,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43790849673202614 [2024-06-20 16:31:47,559 INFO L175 Difference]: Start difference. First operand has 103 places, 123 transitions, 1113 flow. Second operand 6 states and 134 transitions. [2024-06-20 16:31:47,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 141 transitions, 1429 flow [2024-06-20 16:31:47,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 141 transitions, 1272 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-20 16:31:47,721 INFO L231 Difference]: Finished difference. Result has 104 places, 123 transitions, 1007 flow [2024-06-20 16:31:47,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1007, PETRI_PLACES=104, PETRI_TRANSITIONS=123} [2024-06-20 16:31:47,721 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 50 predicate places. [2024-06-20 16:31:47,722 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 123 transitions, 1007 flow [2024-06-20 16:31:47,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:47,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:47,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:47,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:31:47,722 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)] === [2024-06-20 16:31:47,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:47,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1348323876, now seen corresponding path program 1 times [2024-06-20 16:31:47,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:47,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261936303] [2024-06-20 16:31:47,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:47,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:48,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:48,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261936303] [2024-06-20 16:31:48,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261936303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:48,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:48,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:31:48,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48041121] [2024-06-20 16:31:48,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:48,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:31:48,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:48,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:31:48,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:31:48,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:31:48,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 123 transitions, 1007 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:48,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:48,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:31:48,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:50,060 INFO L124 PetriNetUnfolderBase]: 8831/12505 cut-off events. [2024-06-20 16:31:50,061 INFO L125 PetriNetUnfolderBase]: For 177847/177853 co-relation queries the response was YES. [2024-06-20 16:31:50,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63477 conditions, 12505 events. 8831/12505 cut-off events. For 177847/177853 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 69496 event pairs, 3564 based on Foata normal form. 6/12506 useless extension candidates. Maximal degree in co-relation 63437. Up to 12081 conditions per place. [2024-06-20 16:31:50,157 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 126 selfloop transitions, 21 changer transitions 0/154 dead transitions. [2024-06-20 16:31:50,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 154 transitions, 1519 flow [2024-06-20 16:31:50,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:31:50,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:31:50,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-20 16:31:50,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-20 16:31:50,159 INFO L175 Difference]: Start difference. First operand has 104 places, 123 transitions, 1007 flow. Second operand 6 states and 144 transitions. [2024-06-20 16:31:50,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 154 transitions, 1519 flow [2024-06-20 16:31:50,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 154 transitions, 1460 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 16:31:50,285 INFO L231 Difference]: Finished difference. Result has 105 places, 131 transitions, 1099 flow [2024-06-20 16:31:50,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1099, PETRI_PLACES=105, PETRI_TRANSITIONS=131} [2024-06-20 16:31:50,286 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 51 predicate places. [2024-06-20 16:31:50,286 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 131 transitions, 1099 flow [2024-06-20 16:31:50,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:50,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:50,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:50,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:31:50,286 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)] === [2024-06-20 16:31:50,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:50,287 INFO L85 PathProgramCache]: Analyzing trace with hash 630739306, now seen corresponding path program 2 times [2024-06-20 16:31:50,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:50,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843673800] [2024-06-20 16:31:50,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:50,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:51,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:51,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843673800] [2024-06-20 16:31:51,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843673800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:51,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:51,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:31:51,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144759010] [2024-06-20 16:31:51,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:51,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:31:51,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:51,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:31:51,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:31:51,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:31:51,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 131 transitions, 1099 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:51,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:51,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:31:51,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:52,555 INFO L124 PetriNetUnfolderBase]: 8824/12497 cut-off events. [2024-06-20 16:31:52,555 INFO L125 PetriNetUnfolderBase]: For 199767/199773 co-relation queries the response was YES. [2024-06-20 16:31:52,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66174 conditions, 12497 events. 8824/12497 cut-off events. For 199767/199773 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 69497 event pairs, 3567 based on Foata normal form. 6/12497 useless extension candidates. Maximal degree in co-relation 66133. Up to 12074 conditions per place. [2024-06-20 16:31:52,659 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 121 selfloop transitions, 21 changer transitions 0/149 dead transitions. [2024-06-20 16:31:52,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 149 transitions, 1429 flow [2024-06-20 16:31:52,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:31:52,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:31:52,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-20 16:31:52,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542483660130719 [2024-06-20 16:31:52,669 INFO L175 Difference]: Start difference. First operand has 105 places, 131 transitions, 1099 flow. Second operand 6 states and 139 transitions. [2024-06-20 16:31:52,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 149 transitions, 1429 flow [2024-06-20 16:31:52,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 149 transitions, 1351 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-20 16:31:52,996 INFO L231 Difference]: Finished difference. Result has 109 places, 131 transitions, 1072 flow [2024-06-20 16:31:52,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1072, PETRI_PLACES=109, PETRI_TRANSITIONS=131} [2024-06-20 16:31:52,997 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 55 predicate places. [2024-06-20 16:31:52,998 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 131 transitions, 1072 flow [2024-06-20 16:31:52,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:52,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:52,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:52,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:31:52,999 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:31:52,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:53,000 INFO L85 PathProgramCache]: Analyzing trace with hash 781671066, now seen corresponding path program 1 times [2024-06-20 16:31:53,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:53,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738194638] [2024-06-20 16:31:53,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:53,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:53,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:53,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738194638] [2024-06-20 16:31:53,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738194638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:53,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:53,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:31:53,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346733705] [2024-06-20 16:31:53,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:53,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:31:53,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:53,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:31:53,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:31:54,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:54,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 131 transitions, 1072 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:54,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:54,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:54,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:55,754 INFO L124 PetriNetUnfolderBase]: 10274/14202 cut-off events. [2024-06-20 16:31:55,754 INFO L125 PetriNetUnfolderBase]: For 257792/257804 co-relation queries the response was YES. [2024-06-20 16:31:55,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76840 conditions, 14202 events. 10274/14202 cut-off events. For 257792/257804 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 76787 event pairs, 4265 based on Foata normal form. 12/14206 useless extension candidates. Maximal degree in co-relation 76797. Up to 13757 conditions per place. [2024-06-20 16:31:55,870 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 129 selfloop transitions, 52 changer transitions 0/187 dead transitions. [2024-06-20 16:31:55,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 187 transitions, 1882 flow [2024-06-20 16:31:55,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:31:55,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:31:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 16:31:55,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-20 16:31:55,874 INFO L175 Difference]: Start difference. First operand has 109 places, 131 transitions, 1072 flow. Second operand 7 states and 175 transitions. [2024-06-20 16:31:55,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 187 transitions, 1882 flow [2024-06-20 16:31:56,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 187 transitions, 1827 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 16:31:56,055 INFO L231 Difference]: Finished difference. Result has 113 places, 149 transitions, 1392 flow [2024-06-20 16:31:56,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1392, PETRI_PLACES=113, PETRI_TRANSITIONS=149} [2024-06-20 16:31:56,056 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 59 predicate places. [2024-06-20 16:31:56,056 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 149 transitions, 1392 flow [2024-06-20 16:31:56,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:56,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:56,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:56,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:31:56,057 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:31:56,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:56,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1107851780, now seen corresponding path program 1 times [2024-06-20 16:31:56,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:56,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791676978] [2024-06-20 16:31:56,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:56,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:31:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:31:57,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:31:57,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791676978] [2024-06-20 16:31:57,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791676978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:31:57,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:31:57,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:31:57,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910925902] [2024-06-20 16:31:57,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:31:57,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:31:57,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:31:57,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:31:57,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:31:57,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:31:57,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 149 transitions, 1392 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:57,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:31:57,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:31:57,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:31:58,996 INFO L124 PetriNetUnfolderBase]: 10516/14583 cut-off events. [2024-06-20 16:31:58,996 INFO L125 PetriNetUnfolderBase]: For 298888/298891 co-relation queries the response was YES. [2024-06-20 16:31:59,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83347 conditions, 14583 events. 10516/14583 cut-off events. For 298888/298891 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 79427 event pairs, 4270 based on Foata normal form. 18/14593 useless extension candidates. Maximal degree in co-relation 83301. Up to 13655 conditions per place. [2024-06-20 16:31:59,134 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 147 selfloop transitions, 53 changer transitions 0/206 dead transitions. [2024-06-20 16:31:59,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 206 transitions, 2027 flow [2024-06-20 16:31:59,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:31:59,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:31:59,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 16:31:59,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2024-06-20 16:31:59,136 INFO L175 Difference]: Start difference. First operand has 113 places, 149 transitions, 1392 flow. Second operand 8 states and 196 transitions. [2024-06-20 16:31:59,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 206 transitions, 2027 flow [2024-06-20 16:31:59,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 206 transitions, 1921 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-20 16:31:59,431 INFO L231 Difference]: Finished difference. Result has 120 places, 158 transitions, 1553 flow [2024-06-20 16:31:59,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1553, PETRI_PLACES=120, PETRI_TRANSITIONS=158} [2024-06-20 16:31:59,432 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 66 predicate places. [2024-06-20 16:31:59,432 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 158 transitions, 1553 flow [2024-06-20 16:31:59,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:31:59,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:31:59,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:31:59,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:31:59,432 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:31:59,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:31:59,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1242923836, now seen corresponding path program 1 times [2024-06-20 16:31:59,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:31:59,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247240153] [2024-06-20 16:31:59,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:31:59,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:31:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:00,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:00,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247240153] [2024-06-20 16:32:00,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247240153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:00,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:00,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:00,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261241712] [2024-06-20 16:32:00,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:00,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:00,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:00,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:00,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:00,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:32:00,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 158 transitions, 1553 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:00,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:00,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:32:00,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:02,114 INFO L124 PetriNetUnfolderBase]: 10548/14627 cut-off events. [2024-06-20 16:32:02,114 INFO L125 PetriNetUnfolderBase]: For 317326/317332 co-relation queries the response was YES. [2024-06-20 16:32:02,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84719 conditions, 14627 events. 10548/14627 cut-off events. For 317326/317332 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 79635 event pairs, 4257 based on Foata normal form. 5/14627 useless extension candidates. Maximal degree in co-relation 84670. Up to 14319 conditions per place. [2024-06-20 16:32:02,241 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 162 selfloop transitions, 31 changer transitions 0/199 dead transitions. [2024-06-20 16:32:02,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 199 transitions, 2237 flow [2024-06-20 16:32:02,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 16:32:02,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649859943977591 [2024-06-20 16:32:02,244 INFO L175 Difference]: Start difference. First operand has 120 places, 158 transitions, 1553 flow. Second operand 7 states and 166 transitions. [2024-06-20 16:32:02,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 199 transitions, 2237 flow [2024-06-20 16:32:02,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 199 transitions, 2147 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-20 16:32:02,537 INFO L231 Difference]: Finished difference. Result has 124 places, 166 transitions, 1674 flow [2024-06-20 16:32:02,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1674, PETRI_PLACES=124, PETRI_TRANSITIONS=166} [2024-06-20 16:32:02,537 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 70 predicate places. [2024-06-20 16:32:02,537 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 166 transitions, 1674 flow [2024-06-20 16:32:02,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:02,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:02,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:02,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:32:02,538 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:32:02,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:02,538 INFO L85 PathProgramCache]: Analyzing trace with hash -412950718, now seen corresponding path program 2 times [2024-06-20 16:32:02,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:02,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901205222] [2024-06-20 16:32:02,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:02,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:03,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:03,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:03,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901205222] [2024-06-20 16:32:03,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901205222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:03,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:03,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:03,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129697186] [2024-06-20 16:32:03,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:03,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:03,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:03,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:03,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:03,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:32:03,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 166 transitions, 1674 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:03,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:03,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:32:03,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:05,372 INFO L124 PetriNetUnfolderBase]: 10631/14751 cut-off events. [2024-06-20 16:32:05,372 INFO L125 PetriNetUnfolderBase]: For 350416/350425 co-relation queries the response was YES. [2024-06-20 16:32:05,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88130 conditions, 14751 events. 10631/14751 cut-off events. For 350416/350425 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 80559 event pairs, 4290 based on Foata normal form. 10/14753 useless extension candidates. Maximal degree in co-relation 88080. Up to 14238 conditions per place. [2024-06-20 16:32:05,502 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 144 selfloop transitions, 58 changer transitions 0/208 dead transitions. [2024-06-20 16:32:05,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 208 transitions, 2466 flow [2024-06-20 16:32:05,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:05,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 16:32:05,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4733893557422969 [2024-06-20 16:32:05,504 INFO L175 Difference]: Start difference. First operand has 124 places, 166 transitions, 1674 flow. Second operand 7 states and 169 transitions. [2024-06-20 16:32:05,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 208 transitions, 2466 flow [2024-06-20 16:32:05,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 208 transitions, 2388 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-20 16:32:05,822 INFO L231 Difference]: Finished difference. Result has 129 places, 176 transitions, 1876 flow [2024-06-20 16:32:05,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1596, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1876, PETRI_PLACES=129, PETRI_TRANSITIONS=176} [2024-06-20 16:32:05,822 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 75 predicate places. [2024-06-20 16:32:05,822 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 176 transitions, 1876 flow [2024-06-20 16:32:05,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:05,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:05,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:05,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:32:05,823 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:32:05,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:05,823 INFO L85 PathProgramCache]: Analyzing trace with hash 411308096, now seen corresponding path program 2 times [2024-06-20 16:32:05,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:05,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107775518] [2024-06-20 16:32:05,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:05,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:06,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:06,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107775518] [2024-06-20 16:32:06,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107775518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:06,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:06,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:06,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745497241] [2024-06-20 16:32:06,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:06,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:06,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:06,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:06,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:06,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:32:06,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 176 transitions, 1876 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:06,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:06,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:32:06,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:08,820 INFO L124 PetriNetUnfolderBase]: 10592/14689 cut-off events. [2024-06-20 16:32:08,820 INFO L125 PetriNetUnfolderBase]: For 373989/373992 co-relation queries the response was YES. [2024-06-20 16:32:08,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88787 conditions, 14689 events. 10592/14689 cut-off events. For 373989/373992 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 79871 event pairs, 3074 based on Foata normal form. 18/14699 useless extension candidates. Maximal degree in co-relation 88734. Up to 13069 conditions per place. [2024-06-20 16:32:08,975 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 151 selfloop transitions, 61 changer transitions 0/218 dead transitions. [2024-06-20 16:32:08,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 218 transitions, 2420 flow [2024-06-20 16:32:08,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:08,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:08,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 16:32:08,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-20 16:32:08,977 INFO L175 Difference]: Start difference. First operand has 129 places, 176 transitions, 1876 flow. Second operand 7 states and 175 transitions. [2024-06-20 16:32:08,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 218 transitions, 2420 flow [2024-06-20 16:32:09,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 218 transitions, 2292 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-20 16:32:09,387 INFO L231 Difference]: Finished difference. Result has 133 places, 176 transitions, 1883 flow [2024-06-20 16:32:09,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1883, PETRI_PLACES=133, PETRI_TRANSITIONS=176} [2024-06-20 16:32:09,388 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 79 predicate places. [2024-06-20 16:32:09,388 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 176 transitions, 1883 flow [2024-06-20 16:32:09,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:09,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:09,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:09,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:32:09,388 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:32:09,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:09,389 INFO L85 PathProgramCache]: Analyzing trace with hash 677005376, now seen corresponding path program 3 times [2024-06-20 16:32:09,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:09,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217059145] [2024-06-20 16:32:09,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:09,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:10,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:10,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217059145] [2024-06-20 16:32:10,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217059145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:10,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:10,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:10,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862594017] [2024-06-20 16:32:10,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:10,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:10,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:10,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:10,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:10,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:32:10,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 176 transitions, 1883 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:10,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:10,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:32:10,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:12,261 INFO L124 PetriNetUnfolderBase]: 10553/14625 cut-off events. [2024-06-20 16:32:12,261 INFO L125 PetriNetUnfolderBase]: For 395092/395101 co-relation queries the response was YES. [2024-06-20 16:32:12,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89308 conditions, 14625 events. 10553/14625 cut-off events. For 395092/395101 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 79439 event pairs, 2557 based on Foata normal form. 19/14619 useless extension candidates. Maximal degree in co-relation 89254. Up to 12830 conditions per place. [2024-06-20 16:32:12,394 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 145 selfloop transitions, 63 changer transitions 0/214 dead transitions. [2024-06-20 16:32:12,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 214 transitions, 2417 flow [2024-06-20 16:32:12,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:12,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:12,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 16:32:12,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-20 16:32:12,396 INFO L175 Difference]: Start difference. First operand has 133 places, 176 transitions, 1883 flow. Second operand 7 states and 168 transitions. [2024-06-20 16:32:12,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 214 transitions, 2417 flow [2024-06-20 16:32:12,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 214 transitions, 2255 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 16:32:12,698 INFO L231 Difference]: Finished difference. Result has 133 places, 177 transitions, 1870 flow [2024-06-20 16:32:12,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1870, PETRI_PLACES=133, PETRI_TRANSITIONS=177} [2024-06-20 16:32:12,699 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 79 predicate places. [2024-06-20 16:32:12,699 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 177 transitions, 1870 flow [2024-06-20 16:32:12,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:12,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:12,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:12,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:32:12,699 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)] === [2024-06-20 16:32:12,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:12,700 INFO L85 PathProgramCache]: Analyzing trace with hash -58687678, now seen corresponding path program 3 times [2024-06-20 16:32:12,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:12,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089072724] [2024-06-20 16:32:12,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:12,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:13,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:13,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089072724] [2024-06-20 16:32:13,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089072724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:13,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:13,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:13,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517702239] [2024-06-20 16:32:13,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:13,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:13,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:13,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:13,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:13,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:32:13,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 177 transitions, 1870 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:13,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:13,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:32:13,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:15,755 INFO L124 PetriNetUnfolderBase]: 10544/14626 cut-off events. [2024-06-20 16:32:15,756 INFO L125 PetriNetUnfolderBase]: For 392702/392723 co-relation queries the response was YES. [2024-06-20 16:32:15,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89732 conditions, 14626 events. 10544/14626 cut-off events. For 392702/392723 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 79639 event pairs, 4280 based on Foata normal form. 15/14624 useless extension candidates. Maximal degree in co-relation 89677. Up to 14119 conditions per place. [2024-06-20 16:32:15,910 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 139 selfloop transitions, 58 changer transitions 0/203 dead transitions. [2024-06-20 16:32:15,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 203 transitions, 2520 flow [2024-06-20 16:32:15,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:15,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:15,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-20 16:32:15,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565826330532213 [2024-06-20 16:32:15,918 INFO L175 Difference]: Start difference. First operand has 133 places, 177 transitions, 1870 flow. Second operand 7 states and 163 transitions. [2024-06-20 16:32:15,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 203 transitions, 2520 flow [2024-06-20 16:32:16,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 203 transitions, 2337 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 16:32:16,193 INFO L231 Difference]: Finished difference. Result has 135 places, 177 transitions, 1814 flow [2024-06-20 16:32:16,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1814, PETRI_PLACES=135, PETRI_TRANSITIONS=177} [2024-06-20 16:32:16,194 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 81 predicate places. [2024-06-20 16:32:16,194 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 177 transitions, 1814 flow [2024-06-20 16:32:16,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:16,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:16,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:16,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:32:16,194 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)] === [2024-06-20 16:32:16,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:16,195 INFO L85 PathProgramCache]: Analyzing trace with hash 793646118, now seen corresponding path program 2 times [2024-06-20 16:32:16,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:16,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808073328] [2024-06-20 16:32:16,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:16,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:17,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:17,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808073328] [2024-06-20 16:32:17,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808073328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:17,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:17,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:17,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828007497] [2024-06-20 16:32:17,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:17,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:17,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:17,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:17,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:17,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:32:17,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 177 transitions, 1814 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:17,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:17,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:32:17,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:19,182 INFO L124 PetriNetUnfolderBase]: 10576/14669 cut-off events. [2024-06-20 16:32:19,182 INFO L125 PetriNetUnfolderBase]: For 413778/413793 co-relation queries the response was YES. [2024-06-20 16:32:19,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90360 conditions, 14669 events. 10576/14669 cut-off events. For 413778/413793 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 79938 event pairs, 4209 based on Foata normal form. 14/14676 useless extension candidates. Maximal degree in co-relation 90304. Up to 14332 conditions per place. [2024-06-20 16:32:19,319 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 167 selfloop transitions, 35 changer transitions 0/208 dead transitions. [2024-06-20 16:32:19,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 208 transitions, 2456 flow [2024-06-20 16:32:19,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:19,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:19,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-20 16:32:19,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44537815126050423 [2024-06-20 16:32:19,320 INFO L175 Difference]: Start difference. First operand has 135 places, 177 transitions, 1814 flow. Second operand 7 states and 159 transitions. [2024-06-20 16:32:19,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 208 transitions, 2456 flow [2024-06-20 16:32:19,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 208 transitions, 2297 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 16:32:19,661 INFO L231 Difference]: Finished difference. Result has 136 places, 181 transitions, 1806 flow [2024-06-20 16:32:19,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1655, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1806, PETRI_PLACES=136, PETRI_TRANSITIONS=181} [2024-06-20 16:32:19,661 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 82 predicate places. [2024-06-20 16:32:19,662 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 181 transitions, 1806 flow [2024-06-20 16:32:19,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:19,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:19,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:19,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:32:19,662 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)] === [2024-06-20 16:32:19,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:19,662 INFO L85 PathProgramCache]: Analyzing trace with hash -58271596, now seen corresponding path program 3 times [2024-06-20 16:32:19,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:19,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47540768] [2024-06-20 16:32:19,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:19,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:20,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:20,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47540768] [2024-06-20 16:32:20,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47540768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:20,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:20,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:20,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236810958] [2024-06-20 16:32:20,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:20,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:20,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:20,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:20,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:20,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:32:20,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 181 transitions, 1806 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:20,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:20,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:32:20,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:22,681 INFO L124 PetriNetUnfolderBase]: 10562/14651 cut-off events. [2024-06-20 16:32:22,682 INFO L125 PetriNetUnfolderBase]: For 437191/437206 co-relation queries the response was YES. [2024-06-20 16:32:22,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90575 conditions, 14651 events. 10562/14651 cut-off events. For 437191/437206 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 79683 event pairs, 4209 based on Foata normal form. 14/14658 useless extension candidates. Maximal degree in co-relation 90520. Up to 14320 conditions per place. [2024-06-20 16:32:22,829 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 163 selfloop transitions, 36 changer transitions 0/205 dead transitions. [2024-06-20 16:32:22,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 205 transitions, 2264 flow [2024-06-20 16:32:22,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:22,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:22,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-20 16:32:22,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4341736694677871 [2024-06-20 16:32:22,830 INFO L175 Difference]: Start difference. First operand has 136 places, 181 transitions, 1806 flow. Second operand 7 states and 155 transitions. [2024-06-20 16:32:22,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 205 transitions, 2264 flow [2024-06-20 16:32:23,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 205 transitions, 2091 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-20 16:32:23,194 INFO L231 Difference]: Finished difference. Result has 138 places, 181 transitions, 1714 flow [2024-06-20 16:32:23,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1633, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1714, PETRI_PLACES=138, PETRI_TRANSITIONS=181} [2024-06-20 16:32:23,195 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 84 predicate places. [2024-06-20 16:32:23,195 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 181 transitions, 1714 flow [2024-06-20 16:32:23,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:23,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:23,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:23,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:32:23,196 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:32:23,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:23,196 INFO L85 PathProgramCache]: Analyzing trace with hash -235754470, now seen corresponding path program 1 times [2024-06-20 16:32:23,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:23,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346016513] [2024-06-20 16:32:23,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:23,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:24,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:24,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346016513] [2024-06-20 16:32:24,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346016513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:24,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:24,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:24,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764242500] [2024-06-20 16:32:24,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:24,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:24,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:24,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:24,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:24,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:32:24,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 181 transitions, 1714 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 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) [2024-06-20 16:32:24,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:24,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:32:24,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:26,045 INFO L124 PetriNetUnfolderBase]: 9183/13041 cut-off events. [2024-06-20 16:32:26,045 INFO L125 PetriNetUnfolderBase]: For 386910/386910 co-relation queries the response was YES. [2024-06-20 16:32:26,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80073 conditions, 13041 events. 9183/13041 cut-off events. For 386910/386910 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 73061 event pairs, 3499 based on Foata normal form. 2/13033 useless extension candidates. Maximal degree in co-relation 80017. Up to 12582 conditions per place. [2024-06-20 16:32:26,156 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 188 selfloop transitions, 18 changer transitions 0/213 dead transitions. [2024-06-20 16:32:26,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 213 transitions, 2256 flow [2024-06-20 16:32:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:26,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-20 16:32:26,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453781512605042 [2024-06-20 16:32:26,158 INFO L175 Difference]: Start difference. First operand has 138 places, 181 transitions, 1714 flow. Second operand 7 states and 162 transitions. [2024-06-20 16:32:26,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 213 transitions, 2256 flow [2024-06-20 16:32:26,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 213 transitions, 2167 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 16:32:26,553 INFO L231 Difference]: Finished difference. Result has 139 places, 185 transitions, 1736 flow [2024-06-20 16:32:26,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1736, PETRI_PLACES=139, PETRI_TRANSITIONS=185} [2024-06-20 16:32:26,555 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 85 predicate places. [2024-06-20 16:32:26,555 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 185 transitions, 1736 flow [2024-06-20 16:32:26,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 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) [2024-06-20 16:32:26,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:26,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:26,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:32:26,555 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)] === [2024-06-20 16:32:26,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:26,556 INFO L85 PathProgramCache]: Analyzing trace with hash -235634500, now seen corresponding path program 2 times [2024-06-20 16:32:26,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:26,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163690813] [2024-06-20 16:32:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:26,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:27,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:27,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163690813] [2024-06-20 16:32:27,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163690813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:27,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:27,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:27,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189485306] [2024-06-20 16:32:27,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:27,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:27,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:27,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:27,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:27,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:32:27,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 185 transitions, 1736 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 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) [2024-06-20 16:32:27,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:27,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:32:27,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:29,574 INFO L124 PetriNetUnfolderBase]: 9199/13092 cut-off events. [2024-06-20 16:32:29,574 INFO L125 PetriNetUnfolderBase]: For 420020/420023 co-relation queries the response was YES. [2024-06-20 16:32:29,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82836 conditions, 13092 events. 9199/13092 cut-off events. For 420020/420023 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 74057 event pairs, 3503 based on Foata normal form. 4/13091 useless extension candidates. Maximal degree in co-relation 82779. Up to 12556 conditions per place. [2024-06-20 16:32:29,675 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 178 selfloop transitions, 35 changer transitions 0/220 dead transitions. [2024-06-20 16:32:29,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 220 transitions, 2474 flow [2024-06-20 16:32:29,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:29,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-20 16:32:29,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46218487394957986 [2024-06-20 16:32:29,677 INFO L175 Difference]: Start difference. First operand has 139 places, 185 transitions, 1736 flow. Second operand 7 states and 165 transitions. [2024-06-20 16:32:29,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 220 transitions, 2474 flow [2024-06-20 16:32:29,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 220 transitions, 2393 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 16:32:29,940 INFO L231 Difference]: Finished difference. Result has 141 places, 193 transitions, 1874 flow [2024-06-20 16:32:29,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1655, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1874, PETRI_PLACES=141, PETRI_TRANSITIONS=193} [2024-06-20 16:32:29,940 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 87 predicate places. [2024-06-20 16:32:29,940 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 193 transitions, 1874 flow [2024-06-20 16:32:29,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 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) [2024-06-20 16:32:29,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:29,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:29,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:32:29,941 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)] === [2024-06-20 16:32:29,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:29,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1151635042, now seen corresponding path program 1 times [2024-06-20 16:32:29,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:29,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416952050] [2024-06-20 16:32:29,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:29,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:30,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:30,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416952050] [2024-06-20 16:32:30,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416952050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:30,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:30,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:30,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260214220] [2024-06-20 16:32:30,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:30,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:30,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:30,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:30,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:30,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:32:30,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 193 transitions, 1874 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 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) [2024-06-20 16:32:30,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:30,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:32:30,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:32,979 INFO L124 PetriNetUnfolderBase]: 9231/13124 cut-off events. [2024-06-20 16:32:32,979 INFO L125 PetriNetUnfolderBase]: For 457740/457743 co-relation queries the response was YES. [2024-06-20 16:32:33,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85826 conditions, 13124 events. 9231/13124 cut-off events. For 457740/457743 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 74033 event pairs, 3482 based on Foata normal form. 4/13121 useless extension candidates. Maximal degree in co-relation 85768. Up to 12572 conditions per place. [2024-06-20 16:32:33,079 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 193 selfloop transitions, 31 changer transitions 0/231 dead transitions. [2024-06-20 16:32:33,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 231 transitions, 2644 flow [2024-06-20 16:32:33,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:33,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:33,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 16:32:33,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-20 16:32:33,081 INFO L175 Difference]: Start difference. First operand has 141 places, 193 transitions, 1874 flow. Second operand 7 states and 168 transitions. [2024-06-20 16:32:33,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 231 transitions, 2644 flow [2024-06-20 16:32:33,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 231 transitions, 2554 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-20 16:32:33,474 INFO L231 Difference]: Finished difference. Result has 145 places, 201 transitions, 1995 flow [2024-06-20 16:32:33,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1995, PETRI_PLACES=145, PETRI_TRANSITIONS=201} [2024-06-20 16:32:33,475 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 91 predicate places. [2024-06-20 16:32:33,475 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 201 transitions, 1995 flow [2024-06-20 16:32:33,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 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) [2024-06-20 16:32:33,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:33,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:33,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:32:33,476 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)] === [2024-06-20 16:32:33,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:33,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1921915942, now seen corresponding path program 3 times [2024-06-20 16:32:33,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:33,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810018601] [2024-06-20 16:32:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:33,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:34,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:34,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810018601] [2024-06-20 16:32:34,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810018601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:34,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:34,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:34,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061763266] [2024-06-20 16:32:34,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:34,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:34,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:34,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:34,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:34,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:32:34,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 201 transitions, 1995 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 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) [2024-06-20 16:32:34,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:34,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:32:34,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:36,268 INFO L124 PetriNetUnfolderBase]: 9224/13121 cut-off events. [2024-06-20 16:32:36,269 INFO L125 PetriNetUnfolderBase]: For 485668/485671 co-relation queries the response was YES. [2024-06-20 16:32:36,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87952 conditions, 13121 events. 9224/13121 cut-off events. For 485668/485671 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 73929 event pairs, 3497 based on Foata normal form. 2/13115 useless extension candidates. Maximal degree in co-relation 87892. Up to 12591 conditions per place. [2024-06-20 16:32:36,428 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 181 selfloop transitions, 35 changer transitions 0/223 dead transitions. [2024-06-20 16:32:36,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 223 transitions, 2483 flow [2024-06-20 16:32:36,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:36,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:36,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-20 16:32:36,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481792717086835 [2024-06-20 16:32:36,430 INFO L175 Difference]: Start difference. First operand has 145 places, 201 transitions, 1995 flow. Second operand 7 states and 160 transitions. [2024-06-20 16:32:36,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 223 transitions, 2483 flow [2024-06-20 16:32:37,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 223 transitions, 2367 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-20 16:32:37,038 INFO L231 Difference]: Finished difference. Result has 149 places, 201 transitions, 1958 flow [2024-06-20 16:32:37,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1958, PETRI_PLACES=149, PETRI_TRANSITIONS=201} [2024-06-20 16:32:37,039 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 95 predicate places. [2024-06-20 16:32:37,039 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 201 transitions, 1958 flow [2024-06-20 16:32:37,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 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) [2024-06-20 16:32:37,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:37,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:37,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:32:37,040 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)] === [2024-06-20 16:32:37,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:37,041 INFO L85 PathProgramCache]: Analyzing trace with hash -58502794, now seen corresponding path program 2 times [2024-06-20 16:32:37,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:37,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694754756] [2024-06-20 16:32:37,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:37,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:38,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:38,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694754756] [2024-06-20 16:32:38,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694754756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:38,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:38,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:38,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527302122] [2024-06-20 16:32:38,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:38,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:38,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:38,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:38,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:38,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:32:38,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 201 transitions, 1958 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 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) [2024-06-20 16:32:38,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:38,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:32:38,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:40,010 INFO L124 PetriNetUnfolderBase]: 9256/13166 cut-off events. [2024-06-20 16:32:40,010 INFO L125 PetriNetUnfolderBase]: For 511758/511764 co-relation queries the response was YES. [2024-06-20 16:32:40,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88961 conditions, 13166 events. 9256/13166 cut-off events. For 511758/511764 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 74238 event pairs, 3459 based on Foata normal form. 8/13168 useless extension candidates. Maximal degree in co-relation 88899. Up to 12592 conditions per place. [2024-06-20 16:32:40,134 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 190 selfloop transitions, 35 changer transitions 0/232 dead transitions. [2024-06-20 16:32:40,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 232 transitions, 2662 flow [2024-06-20 16:32:40,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:40,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:40,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-20 16:32:40,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46218487394957986 [2024-06-20 16:32:40,136 INFO L175 Difference]: Start difference. First operand has 149 places, 201 transitions, 1958 flow. Second operand 7 states and 165 transitions. [2024-06-20 16:32:40,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 232 transitions, 2662 flow [2024-06-20 16:32:40,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 232 transitions, 2552 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 16:32:40,540 INFO L231 Difference]: Finished difference. Result has 149 places, 205 transitions, 1991 flow [2024-06-20 16:32:40,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1991, PETRI_PLACES=149, PETRI_TRANSITIONS=205} [2024-06-20 16:32:40,540 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 95 predicate places. [2024-06-20 16:32:40,540 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 205 transitions, 1991 flow [2024-06-20 16:32:40,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 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) [2024-06-20 16:32:40,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:40,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:40,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:32:40,541 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)] === [2024-06-20 16:32:40,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:40,541 INFO L85 PathProgramCache]: Analyzing trace with hash 794067780, now seen corresponding path program 3 times [2024-06-20 16:32:40,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:40,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881229980] [2024-06-20 16:32:40,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:40,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:41,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:41,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881229980] [2024-06-20 16:32:41,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881229980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:41,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:41,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:41,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73148594] [2024-06-20 16:32:41,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:41,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:41,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:41,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:41,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:41,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:32:41,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 205 transitions, 1991 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 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) [2024-06-20 16:32:41,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:41,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:32:41,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:43,528 INFO L124 PetriNetUnfolderBase]: 9242/13148 cut-off events. [2024-06-20 16:32:43,529 INFO L125 PetriNetUnfolderBase]: For 535439/535445 co-relation queries the response was YES. [2024-06-20 16:32:43,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89532 conditions, 13148 events. 9242/13148 cut-off events. For 535439/535445 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 74021 event pairs, 3459 based on Foata normal form. 8/13150 useless extension candidates. Maximal degree in co-relation 89470. Up to 12580 conditions per place. [2024-06-20 16:32:43,646 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 186 selfloop transitions, 36 changer transitions 0/229 dead transitions. [2024-06-20 16:32:43,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 229 transitions, 2495 flow [2024-06-20 16:32:43,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:43,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:43,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-20 16:32:43,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2024-06-20 16:32:43,648 INFO L175 Difference]: Start difference. First operand has 149 places, 205 transitions, 1991 flow. Second operand 7 states and 161 transitions. [2024-06-20 16:32:43,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 229 transitions, 2495 flow [2024-06-20 16:32:44,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 229 transitions, 2340 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-20 16:32:44,027 INFO L231 Difference]: Finished difference. Result has 151 places, 205 transitions, 1917 flow [2024-06-20 16:32:44,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1917, PETRI_PLACES=151, PETRI_TRANSITIONS=205} [2024-06-20 16:32:44,027 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 97 predicate places. [2024-06-20 16:32:44,027 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 205 transitions, 1917 flow [2024-06-20 16:32:44,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 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) [2024-06-20 16:32:44,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:44,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:44,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:32:44,028 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)] === [2024-06-20 16:32:44,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:44,028 INFO L85 PathProgramCache]: Analyzing trace with hash -58256716, now seen corresponding path program 1 times [2024-06-20 16:32:44,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:44,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259850753] [2024-06-20 16:32:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:44,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:45,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:45,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259850753] [2024-06-20 16:32:45,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259850753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:45,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:45,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:45,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397241073] [2024-06-20 16:32:45,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:45,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:45,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:45,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:45,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:45,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:32:45,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 205 transitions, 1917 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:45,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:45,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:32:45,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:47,077 INFO L124 PetriNetUnfolderBase]: 9230/13128 cut-off events. [2024-06-20 16:32:47,077 INFO L125 PetriNetUnfolderBase]: For 558281/558281 co-relation queries the response was YES. [2024-06-20 16:32:47,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89876 conditions, 13128 events. 9230/13128 cut-off events. For 558281/558281 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 73851 event pairs, 3448 based on Foata normal form. 4/13128 useless extension candidates. Maximal degree in co-relation 89813. Up to 12638 conditions per place. [2024-06-20 16:32:47,211 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 208 selfloop transitions, 17 changer transitions 0/232 dead transitions. [2024-06-20 16:32:47,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 232 transitions, 2501 flow [2024-06-20 16:32:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:47,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:47,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-20 16:32:47,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43977591036414565 [2024-06-20 16:32:47,213 INFO L175 Difference]: Start difference. First operand has 151 places, 205 transitions, 1917 flow. Second operand 7 states and 157 transitions. [2024-06-20 16:32:47,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 232 transitions, 2501 flow [2024-06-20 16:32:47,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 232 transitions, 2410 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 16:32:47,806 INFO L231 Difference]: Finished difference. Result has 152 places, 208 transitions, 1948 flow [2024-06-20 16:32:47,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1826, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1948, PETRI_PLACES=152, PETRI_TRANSITIONS=208} [2024-06-20 16:32:47,807 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 98 predicate places. [2024-06-20 16:32:47,807 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 208 transitions, 1948 flow [2024-06-20 16:32:47,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:47,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:47,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:47,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:32:47,807 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)] === [2024-06-20 16:32:47,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:47,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1702657354, now seen corresponding path program 1 times [2024-06-20 16:32:47,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:47,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059083347] [2024-06-20 16:32:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:47,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:48,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:48,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059083347] [2024-06-20 16:32:48,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059083347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:48,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:48,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:32:48,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208705915] [2024-06-20 16:32:48,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:48,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:32:48,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:48,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:32:48,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:32:48,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:32:48,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 208 transitions, 1948 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:48,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:48,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:32:48,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:50,262 INFO L124 PetriNetUnfolderBase]: 8802/12859 cut-off events. [2024-06-20 16:32:50,262 INFO L125 PetriNetUnfolderBase]: For 565566/565750 co-relation queries the response was YES. [2024-06-20 16:32:50,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89598 conditions, 12859 events. 8802/12859 cut-off events. For 565566/565750 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 75689 event pairs, 3351 based on Foata normal form. 1/12726 useless extension candidates. Maximal degree in co-relation 89534. Up to 11967 conditions per place. [2024-06-20 16:32:50,397 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 191 selfloop transitions, 10 changer transitions 0/223 dead transitions. [2024-06-20 16:32:50,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 223 transitions, 2440 flow [2024-06-20 16:32:50,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:32:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:32:50,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-20 16:32:50,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4549019607843137 [2024-06-20 16:32:50,398 INFO L175 Difference]: Start difference. First operand has 152 places, 208 transitions, 1948 flow. Second operand 5 states and 116 transitions. [2024-06-20 16:32:50,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 223 transitions, 2440 flow [2024-06-20 16:32:50,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 223 transitions, 2342 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-20 16:32:50,984 INFO L231 Difference]: Finished difference. Result has 152 places, 212 transitions, 1947 flow [2024-06-20 16:32:50,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1850, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1947, PETRI_PLACES=152, PETRI_TRANSITIONS=212} [2024-06-20 16:32:50,985 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 98 predicate places. [2024-06-20 16:32:50,985 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 212 transitions, 1947 flow [2024-06-20 16:32:50,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:50,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:50,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:50,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:32:50,986 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)] === [2024-06-20 16:32:50,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:50,986 INFO L85 PathProgramCache]: Analyzing trace with hash 74177438, now seen corresponding path program 1 times [2024-06-20 16:32:50,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:50,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021356157] [2024-06-20 16:32:50,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:50,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:51,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:51,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021356157] [2024-06-20 16:32:51,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021356157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:51,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:51,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:32:51,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150422736] [2024-06-20 16:32:51,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:51,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:32:51,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:51,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:32:51,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:32:52,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:32:52,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 212 transitions, 1947 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:52,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:52,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:32:52,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:54,185 INFO L124 PetriNetUnfolderBase]: 10727/14879 cut-off events. [2024-06-20 16:32:54,185 INFO L125 PetriNetUnfolderBase]: For 724185/724194 co-relation queries the response was YES. [2024-06-20 16:32:54,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108395 conditions, 14879 events. 10727/14879 cut-off events. For 724185/724194 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 81158 event pairs, 4101 based on Foata normal form. 12/14883 useless extension candidates. Maximal degree in co-relation 108330. Up to 13932 conditions per place. [2024-06-20 16:32:54,353 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 174 selfloop transitions, 93 changer transitions 0/273 dead transitions. [2024-06-20 16:32:54,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 273 transitions, 3125 flow [2024-06-20 16:32:54,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:32:54,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:32:54,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 16:32:54,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49264705882352944 [2024-06-20 16:32:54,355 INFO L175 Difference]: Start difference. First operand has 152 places, 212 transitions, 1947 flow. Second operand 8 states and 201 transitions. [2024-06-20 16:32:54,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 273 transitions, 3125 flow [2024-06-20 16:32:54,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 273 transitions, 3056 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-20 16:32:54,953 INFO L231 Difference]: Finished difference. Result has 158 places, 227 transitions, 2390 flow [2024-06-20 16:32:54,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2390, PETRI_PLACES=158, PETRI_TRANSITIONS=227} [2024-06-20 16:32:54,953 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 104 predicate places. [2024-06-20 16:32:54,954 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 227 transitions, 2390 flow [2024-06-20 16:32:54,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:54,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:54,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:54,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:32:54,954 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)] === [2024-06-20 16:32:54,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:54,955 INFO L85 PathProgramCache]: Analyzing trace with hash -129786335, now seen corresponding path program 1 times [2024-06-20 16:32:54,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:54,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551943890] [2024-06-20 16:32:54,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:54,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:55,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:55,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551943890] [2024-06-20 16:32:55,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551943890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:55,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:55,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:55,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904102036] [2024-06-20 16:32:55,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:55,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:55,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:55,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:55,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:55,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:32:55,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 227 transitions, 2390 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:55,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:55,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:32:55,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:58,150 INFO L124 PetriNetUnfolderBase]: 10805/14981 cut-off events. [2024-06-20 16:32:58,150 INFO L125 PetriNetUnfolderBase]: For 780947/780956 co-relation queries the response was YES. [2024-06-20 16:32:58,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114443 conditions, 14981 events. 10805/14981 cut-off events. For 780947/780956 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 81646 event pairs, 4172 based on Foata normal form. 10/14983 useless extension candidates. Maximal degree in co-relation 114376. Up to 14423 conditions per place. [2024-06-20 16:32:58,308 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 196 selfloop transitions, 73 changer transitions 0/275 dead transitions. [2024-06-20 16:32:58,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 275 transitions, 3516 flow [2024-06-20 16:32:58,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:58,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:58,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 16:32:58,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789915966386555 [2024-06-20 16:32:58,309 INFO L175 Difference]: Start difference. First operand has 158 places, 227 transitions, 2390 flow. Second operand 7 states and 171 transitions. [2024-06-20 16:32:58,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 275 transitions, 3516 flow [2024-06-20 16:32:59,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 275 transitions, 3365 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-20 16:32:59,055 INFO L231 Difference]: Finished difference. Result has 163 places, 240 transitions, 2637 flow [2024-06-20 16:32:59,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2239, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2637, PETRI_PLACES=163, PETRI_TRANSITIONS=240} [2024-06-20 16:32:59,056 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 109 predicate places. [2024-06-20 16:32:59,056 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 240 transitions, 2637 flow [2024-06-20 16:32:59,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:59,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:59,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:59,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:32:59,057 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)] === [2024-06-20 16:32:59,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:59,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2104757193, now seen corresponding path program 2 times [2024-06-20 16:32:59,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:59,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647665798] [2024-06-20 16:32:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:59,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:59,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:59,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647665798] [2024-06-20 16:32:59,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647665798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:59,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:59,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:59,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230038504] [2024-06-20 16:32:59,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:59,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:59,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:59,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:59,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:00,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:00,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 240 transitions, 2637 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:00,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:00,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:00,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:02,311 INFO L124 PetriNetUnfolderBase]: 10791/14963 cut-off events. [2024-06-20 16:33:02,311 INFO L125 PetriNetUnfolderBase]: For 805446/805455 co-relation queries the response was YES. [2024-06-20 16:33:02,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114589 conditions, 14963 events. 10791/14963 cut-off events. For 805446/805455 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 81598 event pairs, 4172 based on Foata normal form. 10/14965 useless extension candidates. Maximal degree in co-relation 114519. Up to 14411 conditions per place. [2024-06-20 16:33:02,476 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 197 selfloop transitions, 69 changer transitions 0/272 dead transitions. [2024-06-20 16:33:02,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 272 transitions, 3541 flow [2024-06-20 16:33:02,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 16:33:02,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-20 16:33:02,479 INFO L175 Difference]: Start difference. First operand has 163 places, 240 transitions, 2637 flow. Second operand 7 states and 168 transitions. [2024-06-20 16:33:02,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 272 transitions, 3541 flow [2024-06-20 16:33:03,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 272 transitions, 3421 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-20 16:33:03,678 INFO L231 Difference]: Finished difference. Result has 167 places, 240 transitions, 2667 flow [2024-06-20 16:33:03,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2667, PETRI_PLACES=167, PETRI_TRANSITIONS=240} [2024-06-20 16:33:03,679 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 113 predicate places. [2024-06-20 16:33:03,679 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 240 transitions, 2667 flow [2024-06-20 16:33:03,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:03,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:03,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:03,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:33:03,679 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)] === [2024-06-20 16:33:03,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:03,679 INFO L85 PathProgramCache]: Analyzing trace with hash 83431868, now seen corresponding path program 2 times [2024-06-20 16:33:03,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:03,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485988063] [2024-06-20 16:33:03,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:03,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:04,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:04,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485988063] [2024-06-20 16:33:04,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485988063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:04,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:04,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:04,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989587107] [2024-06-20 16:33:04,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:04,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:04,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:04,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:04,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:04,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:04,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 240 transitions, 2667 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:04,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:04,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:04,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:07,578 INFO L124 PetriNetUnfolderBase]: 11049/15343 cut-off events. [2024-06-20 16:33:07,578 INFO L125 PetriNetUnfolderBase]: For 858168/858177 co-relation queries the response was YES. [2024-06-20 16:33:07,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118280 conditions, 15343 events. 11049/15343 cut-off events. For 858168/858177 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 84053 event pairs, 4103 based on Foata normal form. 12/15347 useless extension candidates. Maximal degree in co-relation 118209. Up to 14159 conditions per place. [2024-06-20 16:33:07,719 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 185 selfloop transitions, 107 changer transitions 0/298 dead transitions. [2024-06-20 16:33:07,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 298 transitions, 4036 flow [2024-06-20 16:33:07,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:07,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 16:33:07,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4877450980392157 [2024-06-20 16:33:07,725 INFO L175 Difference]: Start difference. First operand has 167 places, 240 transitions, 2667 flow. Second operand 8 states and 199 transitions. [2024-06-20 16:33:07,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 298 transitions, 4036 flow [2024-06-20 16:33:08,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 298 transitions, 3905 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:08,461 INFO L231 Difference]: Finished difference. Result has 172 places, 255 transitions, 3030 flow [2024-06-20 16:33:08,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2536, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3030, PETRI_PLACES=172, PETRI_TRANSITIONS=255} [2024-06-20 16:33:08,462 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 118 predicate places. [2024-06-20 16:33:08,462 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 255 transitions, 3030 flow [2024-06-20 16:33:08,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:08,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:08,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:08,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:33:08,462 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)] === [2024-06-20 16:33:08,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:08,464 INFO L85 PathProgramCache]: Analyzing trace with hash -124064882, now seen corresponding path program 3 times [2024-06-20 16:33:08,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:08,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318013248] [2024-06-20 16:33:08,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:08,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:09,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:09,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318013248] [2024-06-20 16:33:09,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318013248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:09,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:09,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:09,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667505110] [2024-06-20 16:33:09,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:09,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:09,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:09,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:09,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:09,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:09,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 255 transitions, 3030 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:09,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:09,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:09,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:12,581 INFO L124 PetriNetUnfolderBase]: 11031/15320 cut-off events. [2024-06-20 16:33:12,581 INFO L125 PetriNetUnfolderBase]: For 891660/891669 co-relation queries the response was YES. [2024-06-20 16:33:12,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119627 conditions, 15320 events. 11031/15320 cut-off events. For 891660/891669 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 84004 event pairs, 4119 based on Foata normal form. 12/15324 useless extension candidates. Maximal degree in co-relation 119554. Up to 14151 conditions per place. [2024-06-20 16:33:12,721 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 185 selfloop transitions, 106 changer transitions 0/297 dead transitions. [2024-06-20 16:33:12,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 297 transitions, 4176 flow [2024-06-20 16:33:12,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:12,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:12,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 16:33:12,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48284313725490197 [2024-06-20 16:33:12,723 INFO L175 Difference]: Start difference. First operand has 172 places, 255 transitions, 3030 flow. Second operand 8 states and 197 transitions. [2024-06-20 16:33:12,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 297 transitions, 4176 flow [2024-06-20 16:33:13,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 297 transitions, 3956 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-20 16:33:13,439 INFO L231 Difference]: Finished difference. Result has 177 places, 255 transitions, 3033 flow [2024-06-20 16:33:13,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2810, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3033, PETRI_PLACES=177, PETRI_TRANSITIONS=255} [2024-06-20 16:33:13,440 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 123 predicate places. [2024-06-20 16:33:13,440 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 255 transitions, 3033 flow [2024-06-20 16:33:13,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:13,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:13,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:13,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:33:13,441 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)] === [2024-06-20 16:33:13,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:13,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1803332121, now seen corresponding path program 3 times [2024-06-20 16:33:13,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:13,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429911467] [2024-06-20 16:33:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:13,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:14,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:14,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429911467] [2024-06-20 16:33:14,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429911467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:14,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:14,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:14,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521495328] [2024-06-20 16:33:14,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:14,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:14,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:14,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:14,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:14,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:14,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 255 transitions, 3033 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:14,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:14,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:14,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:17,384 INFO L124 PetriNetUnfolderBase]: 11009/15267 cut-off events. [2024-06-20 16:33:17,385 INFO L125 PetriNetUnfolderBase]: For 926311/926314 co-relation queries the response was YES. [2024-06-20 16:33:17,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119971 conditions, 15267 events. 11009/15267 cut-off events. For 926311/926314 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 83367 event pairs, 4226 based on Foata normal form. 4/15252 useless extension candidates. Maximal degree in co-relation 119897. Up to 14701 conditions per place. [2024-06-20 16:33:17,527 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 206 selfloop transitions, 78 changer transitions 0/290 dead transitions. [2024-06-20 16:33:17,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 290 transitions, 4052 flow [2024-06-20 16:33:17,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:17,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:17,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-20 16:33:17,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44607843137254904 [2024-06-20 16:33:17,533 INFO L175 Difference]: Start difference. First operand has 177 places, 255 transitions, 3033 flow. Second operand 8 states and 182 transitions. [2024-06-20 16:33:17,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 290 transitions, 4052 flow [2024-06-20 16:33:18,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 290 transitions, 3804 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:18,652 INFO L231 Difference]: Finished difference. Result has 180 places, 257 transitions, 2978 flow [2024-06-20 16:33:18,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2978, PETRI_PLACES=180, PETRI_TRANSITIONS=257} [2024-06-20 16:33:18,657 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 126 predicate places. [2024-06-20 16:33:18,657 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 257 transitions, 2978 flow [2024-06-20 16:33:18,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:18,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:18,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:18,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:33:18,658 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)] === [2024-06-20 16:33:18,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:18,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1285259239, now seen corresponding path program 4 times [2024-06-20 16:33:18,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:18,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163558684] [2024-06-20 16:33:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:18,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:19,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:19,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163558684] [2024-06-20 16:33:19,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163558684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:19,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:19,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:19,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345664593] [2024-06-20 16:33:19,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:19,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:19,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:19,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:19,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:19,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:19,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 257 transitions, 2978 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:19,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:19,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:19,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:22,434 INFO L124 PetriNetUnfolderBase]: 11025/15299 cut-off events. [2024-06-20 16:33:22,435 INFO L125 PetriNetUnfolderBase]: For 962107/962119 co-relation queries the response was YES. [2024-06-20 16:33:22,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120610 conditions, 15299 events. 11025/15299 cut-off events. For 962107/962119 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 83444 event pairs, 4010 based on Foata normal form. 8/15288 useless extension candidates. Maximal degree in co-relation 120534. Up to 14713 conditions per place. [2024-06-20 16:33:22,588 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 200 selfloop transitions, 81 changer transitions 0/287 dead transitions. [2024-06-20 16:33:22,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 287 transitions, 3854 flow [2024-06-20 16:33:22,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:22,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:22,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-20 16:33:22,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45938375350140054 [2024-06-20 16:33:22,590 INFO L175 Difference]: Start difference. First operand has 180 places, 257 transitions, 2978 flow. Second operand 7 states and 164 transitions. [2024-06-20 16:33:22,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 287 transitions, 3854 flow [2024-06-20 16:33:23,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 287 transitions, 3558 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 16:33:23,664 INFO L231 Difference]: Finished difference. Result has 179 places, 261 transitions, 2939 flow [2024-06-20 16:33:23,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2700, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2939, PETRI_PLACES=179, PETRI_TRANSITIONS=261} [2024-06-20 16:33:23,665 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 125 predicate places. [2024-06-20 16:33:23,665 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 261 transitions, 2939 flow [2024-06-20 16:33:23,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:23,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:23,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:23,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:33:23,666 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)] === [2024-06-20 16:33:23,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:23,666 INFO L85 PathProgramCache]: Analyzing trace with hash 550142089, now seen corresponding path program 5 times [2024-06-20 16:33:23,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:23,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655796720] [2024-06-20 16:33:23,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:23,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:24,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:24,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655796720] [2024-06-20 16:33:24,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655796720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:24,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:24,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:24,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212898273] [2024-06-20 16:33:24,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:24,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:24,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:24,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:24,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:24,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:24,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 261 transitions, 2939 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:24,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:24,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:24,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:27,397 INFO L124 PetriNetUnfolderBase]: 11018/15301 cut-off events. [2024-06-20 16:33:27,397 INFO L125 PetriNetUnfolderBase]: For 999305/999323 co-relation queries the response was YES. [2024-06-20 16:33:27,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121173 conditions, 15301 events. 11018/15301 cut-off events. For 999305/999323 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 83572 event pairs, 4002 based on Foata normal form. 12/15296 useless extension candidates. Maximal degree in co-relation 121096. Up to 14708 conditions per place. [2024-06-20 16:33:27,547 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 202 selfloop transitions, 76 changer transitions 0/284 dead transitions. [2024-06-20 16:33:27,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 284 transitions, 3719 flow [2024-06-20 16:33:27,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:27,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-20 16:33:27,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481792717086835 [2024-06-20 16:33:27,549 INFO L175 Difference]: Start difference. First operand has 179 places, 261 transitions, 2939 flow. Second operand 7 states and 160 transitions. [2024-06-20 16:33:27,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 284 transitions, 3719 flow [2024-06-20 16:33:28,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 284 transitions, 3548 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:28,357 INFO L231 Difference]: Finished difference. Result has 182 places, 261 transitions, 2929 flow [2024-06-20 16:33:28,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2768, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2929, PETRI_PLACES=182, PETRI_TRANSITIONS=261} [2024-06-20 16:33:28,357 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 128 predicate places. [2024-06-20 16:33:28,358 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 261 transitions, 2929 flow [2024-06-20 16:33:28,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:28,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:28,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:28,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:33:28,358 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:33:28,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:28,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1819312153, now seen corresponding path program 6 times [2024-06-20 16:33:28,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:28,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730036633] [2024-06-20 16:33:28,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:28,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:29,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:29,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730036633] [2024-06-20 16:33:29,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730036633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:29,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:29,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:29,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392586855] [2024-06-20 16:33:29,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:29,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:29,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:29,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:29,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:29,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:29,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 261 transitions, 2929 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:29,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:29,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:29,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:32,075 INFO L124 PetriNetUnfolderBase]: 10999/15274 cut-off events. [2024-06-20 16:33:32,075 INFO L125 PetriNetUnfolderBase]: For 1038199/1038217 co-relation queries the response was YES. [2024-06-20 16:33:32,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121762 conditions, 15274 events. 10999/15274 cut-off events. For 1038199/1038217 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 83381 event pairs, 4002 based on Foata normal form. 14/15271 useless extension candidates. Maximal degree in co-relation 121684. Up to 14689 conditions per place. [2024-06-20 16:33:32,242 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 204 selfloop transitions, 72 changer transitions 0/282 dead transitions. [2024-06-20 16:33:32,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 282 transitions, 3535 flow [2024-06-20 16:33:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:32,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:32,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-20 16:33:32,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44537815126050423 [2024-06-20 16:33:32,244 INFO L175 Difference]: Start difference. First operand has 182 places, 261 transitions, 2929 flow. Second operand 7 states and 159 transitions. [2024-06-20 16:33:32,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 282 transitions, 3535 flow [2024-06-20 16:33:33,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 282 transitions, 3344 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 16:33:33,372 INFO L231 Difference]: Finished difference. Result has 184 places, 261 transitions, 2893 flow [2024-06-20 16:33:33,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2738, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2893, PETRI_PLACES=184, PETRI_TRANSITIONS=261} [2024-06-20 16:33:33,388 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 130 predicate places. [2024-06-20 16:33:33,388 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 261 transitions, 2893 flow [2024-06-20 16:33:33,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:33,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:33,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:33,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:33:33,388 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:33:33,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:33,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1818929830, now seen corresponding path program 4 times [2024-06-20 16:33:33,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:33,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577501060] [2024-06-20 16:33:33,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:33,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:34,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:34,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577501060] [2024-06-20 16:33:34,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577501060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:34,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:34,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:34,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415427540] [2024-06-20 16:33:34,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:34,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:34,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:34,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:34,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:34,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:33:34,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 261 transitions, 2893 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:34,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:34,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:33:34,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand