./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix016_power.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix016_power.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/mix016_power.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix016_power.opt_rmo.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-eb4cb34-m [2024-06-21 20:43:13,109 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:43:13,170 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:43:13,176 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:43:13,177 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:43:13,209 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:43:13,209 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:43:13,209 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:43:13,210 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:43:13,213 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:43:13,213 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:43:13,213 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:43:13,214 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:43:13,215 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:43:13,215 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:43:13,215 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:43:13,215 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:43:13,216 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:43:13,216 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:43:13,216 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:43:13,216 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:43:13,217 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:43:13,217 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:43:13,217 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:43:13,217 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:43:13,217 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:43:13,218 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:43:13,218 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:43:13,218 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:43:13,219 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:43:13,219 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:43:13,220 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:43:13,220 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:43:13,220 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:43:13,220 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:43:13,220 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:43:13,221 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:43:13,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:43:13,221 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:43:13,221 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:43:13,221 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:43:13,221 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:43:13,222 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:43:13,227 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:43:13,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:43:13,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:43:13,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:43:13,463 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:43:13,463 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:43:13,464 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix016_power.opt_rmo.opt.yml/witness.yml [2024-06-21 20:43:13,626 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:43:13,627 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:43:13,628 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix016_power.opt_rmo.opt.i [2024-06-21 20:43:14,694 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:43:14,922 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:43:14,924 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix016_power.opt_rmo.opt.i [2024-06-21 20:43:14,943 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2b87d968/a81bdf69a7e54f9db885ef7db6e1b953/FLAG21870c085 [2024-06-21 20:43:14,953 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2b87d968/a81bdf69a7e54f9db885ef7db6e1b953 [2024-06-21 20:43:14,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:43:14,954 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:43:14,955 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:43:14,955 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:43:14,959 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:43:14,959 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:43:13" (1/2) ... [2024-06-21 20:43:14,960 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e1f2ea and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:43:14, skipping insertion in model container [2024-06-21 20:43:14,960 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:43:13" (1/2) ... [2024-06-21 20:43:14,961 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@148dbf43 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:43:14, skipping insertion in model container [2024-06-21 20:43:14,961 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:43:14" (2/2) ... [2024-06-21 20:43:14,962 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e1f2ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:43:14, skipping insertion in model container [2024-06-21 20:43:14,962 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:43:14" (2/2) ... [2024-06-21 20:43:14,962 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:43:15,029 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:43:15,030 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-21 20:43:15,031 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-21 20:43:15,031 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-21 20:43:15,031 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:43:15,031 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-21 20:43:15,070 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:43:15,321 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:43:15,329 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:43:15,447 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:43:15,490 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:43:15,490 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:43:15 WrapperNode [2024-06-21 20:43:15,490 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:43:15,491 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:43:15,491 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:43:15,491 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:43:15,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:43:15" (1/1) ... [2024-06-21 20:43:15,511 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:43:15" (1/1) ... [2024-06-21 20:43:15,535 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-21 20:43:15,535 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:43:15,536 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:43:15,536 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:43:15,536 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:43:15,545 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:43:15" (1/1) ... [2024-06-21 20:43:15,545 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:43:15" (1/1) ... [2024-06-21 20:43:15,548 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:43:15" (1/1) ... [2024-06-21 20:43:15,560 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]. [2024-06-21 20:43:15,560 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:43:15" (1/1) ... [2024-06-21 20:43:15,561 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:43:15" (1/1) ... [2024-06-21 20:43:15,568 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:43:15" (1/1) ... [2024-06-21 20:43:15,569 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:43:15" (1/1) ... [2024-06-21 20:43:15,571 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:43:15" (1/1) ... [2024-06-21 20:43:15,572 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:43:15" (1/1) ... [2024-06-21 20:43:15,575 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:43:15,575 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:43:15,575 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:43:15,576 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:43:15,576 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:43:15" (1/1) ... [2024-06-21 20:43:15,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:43:15,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:43:15,608 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) [2024-06-21 20:43:15,644 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 [2024-06-21 20:43:15,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:43:15,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:43:15,669 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:43:15,669 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:43:15,669 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:43:15,670 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:43:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:43:15,670 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:43:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:43:15,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:43:15,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:43:15,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:43:15,672 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:43:15,811 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:43:15,814 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:43:16,084 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:43:16,084 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:43:16,306 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:43:16,306 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:43:16,307 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:43:16 BoogieIcfgContainer [2024-06-21 20:43:16,307 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:43:16,309 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:43:16,309 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:43:16,311 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:43:16,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:43:13" (1/4) ... [2024-06-21 20:43:16,313 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8b5cf5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:43:16, skipping insertion in model container [2024-06-21 20:43:16,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:43:14" (2/4) ... [2024-06-21 20:43:16,313 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8b5cf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:43:16, skipping insertion in model container [2024-06-21 20:43:16,314 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:43:15" (3/4) ... [2024-06-21 20:43:16,314 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8b5cf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:43:16, skipping insertion in model container [2024-06-21 20:43:16,314 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:43:16" (4/4) ... [2024-06-21 20:43:16,315 INFO L112 eAbstractionObserver]: Analyzing ICFG mix016_power.opt_rmo.opt.i [2024-06-21 20:43:16,327 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:43:16,328 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:43:16,328 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:43:16,368 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:43:16,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 20:43:16,421 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 20:43:16,421 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:43:16,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:43:16,423 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 20:43:16,426 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 20:43:16,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:43:16,445 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;@72f454c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:43:16,445 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:43:16,451 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:43:16,452 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:43:16,452 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:43:16,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:16,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:43:16,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:16,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:16,458 INFO L85 PathProgramCache]: Analyzing trace with hash 365436942, now seen corresponding path program 1 times [2024-06-21 20:43:16,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:16,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122976112] [2024-06-21 20:43:16,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:16,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:17,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:17,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122976112] [2024-06-21 20:43:17,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122976112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:17,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:17,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:43:17,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383197077] [2024-06-21 20:43:17,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:17,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:43:17,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:17,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:43:17,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:43:17,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-21 20:43:17,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:17,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:17,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-21 20:43:17,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:17,502 INFO L124 PetriNetUnfolderBase]: 946/1551 cut-off events. [2024-06-21 20:43:17,503 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 20:43:17,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3057 conditions, 1551 events. 946/1551 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7745 event pairs, 638 based on Foata normal form. 1/1490 useless extension candidates. Maximal degree in co-relation 3045. Up to 1431 conditions per place. [2024-06-21 20:43:17,516 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 30 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 20:43:17,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 167 flow [2024-06-21 20:43:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:43:17,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:43:17,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-21 20:43:17,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-21 20:43:17,527 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 79 transitions. [2024-06-21 20:43:17,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 167 flow [2024-06-21 20:43:17,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:43:17,532 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 20:43:17,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 20:43:17,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 20:43:17,536 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 20:43:17,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:17,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:17,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:17,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:43:17,537 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:17,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:17,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1002400659, now seen corresponding path program 1 times [2024-06-21 20:43:17,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:17,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186891471] [2024-06-21 20:43:17,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:17,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:18,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:18,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186891471] [2024-06-21 20:43:18,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186891471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:18,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:18,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:43:18,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944158803] [2024-06-21 20:43:18,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:18,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:43:18,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:18,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:43:18,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:43:18,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-21 20:43:18,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:18,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:18,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-21 20:43:18,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:18,368 INFO L124 PetriNetUnfolderBase]: 1104/1745 cut-off events. [2024-06-21 20:43:18,368 INFO L125 PetriNetUnfolderBase]: For 339/339 co-relation queries the response was YES. [2024-06-21 20:43:18,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3951 conditions, 1745 events. 1104/1745 cut-off events. For 339/339 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8495 event pairs, 517 based on Foata normal form. 6/1748 useless extension candidates. Maximal degree in co-relation 3939. Up to 1628 conditions per place. [2024-06-21 20:43:18,378 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-21 20:43:18,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 53 transitions, 240 flow [2024-06-21 20:43:18,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:43:18,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:43:18,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-21 20:43:18,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-21 20:43:18,382 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 101 transitions. [2024-06-21 20:43:18,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 53 transitions, 240 flow [2024-06-21 20:43:18,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:43:18,385 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-21 20:43:18,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 20:43:18,385 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-21 20:43:18,386 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-21 20:43:18,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:18,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:18,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:18,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:43:18,389 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:18,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:18,389 INFO L85 PathProgramCache]: Analyzing trace with hash 390145838, now seen corresponding path program 1 times [2024-06-21 20:43:18,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:18,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870112313] [2024-06-21 20:43:18,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:18,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:18,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:19,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:19,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870112313] [2024-06-21 20:43:19,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870112313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:19,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:19,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:43:19,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685365077] [2024-06-21 20:43:19,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:19,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:43:19,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:19,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:43:19,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:43:19,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-21 20:43:19,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:19,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:19,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-21 20:43:19,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:19,756 INFO L124 PetriNetUnfolderBase]: 1095/1728 cut-off events. [2024-06-21 20:43:19,756 INFO L125 PetriNetUnfolderBase]: For 953/953 co-relation queries the response was YES. [2024-06-21 20:43:19,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4370 conditions, 1728 events. 1095/1728 cut-off events. For 953/953 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8356 event pairs, 375 based on Foata normal form. 6/1731 useless extension candidates. Maximal degree in co-relation 4356. Up to 1583 conditions per place. [2024-06-21 20:43:19,766 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 49 selfloop transitions, 12 changer transitions 0/68 dead transitions. [2024-06-21 20:43:19,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 68 transitions, 346 flow [2024-06-21 20:43:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:43:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:43:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 20:43:19,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-21 20:43:19,770 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 6 states and 142 transitions. [2024-06-21 20:43:19,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 68 transitions, 346 flow [2024-06-21 20:43:19,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 68 transitions, 326 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 20:43:19,774 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 179 flow [2024-06-21 20:43:19,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-21 20:43:19,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-06-21 20:43:19,775 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 179 flow [2024-06-21 20:43:19,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:19,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:19,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:19,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:43:19,776 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:19,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:19,776 INFO L85 PathProgramCache]: Analyzing trace with hash 292940758, now seen corresponding path program 1 times [2024-06-21 20:43:19,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:19,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675576095] [2024-06-21 20:43:19,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:19,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:20,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:20,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675576095] [2024-06-21 20:43:20,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675576095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:20,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:20,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:43:20,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898387848] [2024-06-21 20:43:20,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:20,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:43:20,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:20,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:43:20,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:43:20,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-21 20:43:20,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:20,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:20,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-21 20:43:20,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:20,741 INFO L124 PetriNetUnfolderBase]: 920/1574 cut-off events. [2024-06-21 20:43:20,742 INFO L125 PetriNetUnfolderBase]: For 1518/1518 co-relation queries the response was YES. [2024-06-21 20:43:20,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4239 conditions, 1574 events. 920/1574 cut-off events. For 1518/1518 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8095 event pairs, 378 based on Foata normal form. 2/1567 useless extension candidates. Maximal degree in co-relation 4222. Up to 1382 conditions per place. [2024-06-21 20:43:20,750 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 41 selfloop transitions, 8 changer transitions 0/56 dead transitions. [2024-06-21 20:43:20,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 56 transitions, 319 flow [2024-06-21 20:43:20,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:43:20,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:43:20,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-21 20:43:20,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024390243902439 [2024-06-21 20:43:20,752 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 179 flow. Second operand 5 states and 103 transitions. [2024-06-21 20:43:20,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 56 transitions, 319 flow [2024-06-21 20:43:20,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 292 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:43:20,754 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 196 flow [2024-06-21 20:43:20,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-21 20:43:20,755 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-21 20:43:20,755 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 196 flow [2024-06-21 20:43:20,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:20,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:20,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:20,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:43:20,756 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:20,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:20,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1957448587, now seen corresponding path program 1 times [2024-06-21 20:43:20,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:20,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644352098] [2024-06-21 20:43:20,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:20,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:21,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:21,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644352098] [2024-06-21 20:43:21,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644352098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:21,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:21,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:43:21,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646576535] [2024-06-21 20:43:21,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:21,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:43:21,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:21,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:43:21,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:43:21,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:43:21,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:21,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:21,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:43:21,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:21,915 INFO L124 PetriNetUnfolderBase]: 1112/1777 cut-off events. [2024-06-21 20:43:21,915 INFO L125 PetriNetUnfolderBase]: For 2711/2711 co-relation queries the response was YES. [2024-06-21 20:43:21,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5313 conditions, 1777 events. 1112/1777 cut-off events. For 2711/2711 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8692 event pairs, 448 based on Foata normal form. 4/1778 useless extension candidates. Maximal degree in co-relation 5294. Up to 1635 conditions per place. [2024-06-21 20:43:21,925 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 50 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2024-06-21 20:43:21,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 67 transitions, 386 flow [2024-06-21 20:43:21,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:43:21,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:43:21,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-21 20:43:21,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491869918699187 [2024-06-21 20:43:21,926 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 196 flow. Second operand 6 states and 121 transitions. [2024-06-21 20:43:21,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 67 transitions, 386 flow [2024-06-21 20:43:21,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 67 transitions, 366 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:43:21,929 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 230 flow [2024-06-21 20:43:21,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-21 20:43:21,930 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-21 20:43:21,930 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 230 flow [2024-06-21 20:43:21,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:21,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:21,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:21,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:43:21,931 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:21,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:21,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1951734667, now seen corresponding path program 2 times [2024-06-21 20:43:21,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:21,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697685685] [2024-06-21 20:43:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:21,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:22,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:22,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697685685] [2024-06-21 20:43:22,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697685685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:22,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:22,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:43:22,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763485633] [2024-06-21 20:43:22,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:22,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:43:22,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:22,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:43:22,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:43:22,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:43:22,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 230 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:22,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:22,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:43:22,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:23,012 INFO L124 PetriNetUnfolderBase]: 1118/1802 cut-off events. [2024-06-21 20:43:23,012 INFO L125 PetriNetUnfolderBase]: For 3961/3964 co-relation queries the response was YES. [2024-06-21 20:43:23,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5820 conditions, 1802 events. 1118/1802 cut-off events. For 3961/3964 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8893 event pairs, 443 based on Foata normal form. 6/1803 useless extension candidates. Maximal degree in co-relation 5800. Up to 1617 conditions per place. [2024-06-21 20:43:23,023 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 46 selfloop transitions, 18 changer transitions 0/70 dead transitions. [2024-06-21 20:43:23,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 70 transitions, 444 flow [2024-06-21 20:43:23,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:43:23,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:43:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 20:43:23,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-21 20:43:23,025 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 230 flow. Second operand 7 states and 134 transitions. [2024-06-21 20:43:23,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 70 transitions, 444 flow [2024-06-21 20:43:23,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 410 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 20:43:23,028 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 286 flow [2024-06-21 20:43:23,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=286, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-21 20:43:23,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-21 20:43:23,029 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 286 flow [2024-06-21 20:43:23,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:23,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:23,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:23,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:43:23,030 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:23,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:23,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1951726731, now seen corresponding path program 1 times [2024-06-21 20:43:23,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:23,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119245230] [2024-06-21 20:43:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:23,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:23,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:23,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119245230] [2024-06-21 20:43:23,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119245230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:23,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:23,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:43:23,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370596049] [2024-06-21 20:43:23,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:23,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:43:23,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:23,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:43:23,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:43:24,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:43:24,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 286 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:24,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:24,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:43:24,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:24,425 INFO L124 PetriNetUnfolderBase]: 1172/1960 cut-off events. [2024-06-21 20:43:24,426 INFO L125 PetriNetUnfolderBase]: For 5276/5276 co-relation queries the response was YES. [2024-06-21 20:43:24,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6559 conditions, 1960 events. 1172/1960 cut-off events. For 5276/5276 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 10116 event pairs, 444 based on Foata normal form. 2/1949 useless extension candidates. Maximal degree in co-relation 6537. Up to 1733 conditions per place. [2024-06-21 20:43:24,435 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 14 changer transitions 0/78 dead transitions. [2024-06-21 20:43:24,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 78 transitions, 518 flow [2024-06-21 20:43:24,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:43:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:43:24,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 20:43:24,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-21 20:43:24,437 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 286 flow. Second operand 7 states and 135 transitions. [2024-06-21 20:43:24,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 78 transitions, 518 flow [2024-06-21 20:43:24,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 474 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 20:43:24,441 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 327 flow [2024-06-21 20:43:24,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=327, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-21 20:43:24,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-21 20:43:24,442 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 327 flow [2024-06-21 20:43:24,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:24,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:24,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:24,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:43:24,442 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:24,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:24,443 INFO L85 PathProgramCache]: Analyzing trace with hash -551482761, now seen corresponding path program 1 times [2024-06-21 20:43:24,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:24,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229043408] [2024-06-21 20:43:24,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:24,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:25,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:25,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229043408] [2024-06-21 20:43:25,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229043408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:25,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:25,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:43:25,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573092233] [2024-06-21 20:43:25,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:25,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:43:25,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:25,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:43:25,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:43:25,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:43:25,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 327 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:25,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:25,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:43:25,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:25,894 INFO L124 PetriNetUnfolderBase]: 1289/2061 cut-off events. [2024-06-21 20:43:25,894 INFO L125 PetriNetUnfolderBase]: For 7614/7614 co-relation queries the response was YES. [2024-06-21 20:43:25,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7590 conditions, 2061 events. 1289/2061 cut-off events. For 7614/7614 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10308 event pairs, 467 based on Foata normal form. 2/2060 useless extension candidates. Maximal degree in co-relation 7565. Up to 1883 conditions per place. [2024-06-21 20:43:25,906 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 64 selfloop transitions, 15 changer transitions 0/86 dead transitions. [2024-06-21 20:43:25,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 86 transitions, 584 flow [2024-06-21 20:43:25,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:43:25,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:43:25,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 20:43:25,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912891986062718 [2024-06-21 20:43:25,908 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 327 flow. Second operand 7 states and 141 transitions. [2024-06-21 20:43:25,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 86 transitions, 584 flow [2024-06-21 20:43:25,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 86 transitions, 546 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 20:43:25,911 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 365 flow [2024-06-21 20:43:25,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=365, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-06-21 20:43:25,912 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-21 20:43:25,912 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 365 flow [2024-06-21 20:43:25,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:25,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:25,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:25,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:43:25,913 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:25,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:25,913 INFO L85 PathProgramCache]: Analyzing trace with hash -373985007, now seen corresponding path program 1 times [2024-06-21 20:43:25,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:25,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574714137] [2024-06-21 20:43:25,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:25,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:26,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:26,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574714137] [2024-06-21 20:43:26,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574714137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:26,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:26,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:26,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659442206] [2024-06-21 20:43:26,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:26,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:26,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:26,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:26,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:27,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:43:27,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 365 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) [2024-06-21 20:43:27,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:27,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:43:27,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:27,416 INFO L124 PetriNetUnfolderBase]: 1154/1926 cut-off events. [2024-06-21 20:43:27,417 INFO L125 PetriNetUnfolderBase]: For 8267/8267 co-relation queries the response was YES. [2024-06-21 20:43:27,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7181 conditions, 1926 events. 1154/1926 cut-off events. For 8267/8267 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9863 event pairs, 415 based on Foata normal form. 4/1913 useless extension candidates. Maximal degree in co-relation 7155. Up to 1689 conditions per place. [2024-06-21 20:43:27,430 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 66 selfloop transitions, 16 changer transitions 0/88 dead transitions. [2024-06-21 20:43:27,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 88 transitions, 618 flow [2024-06-21 20:43:27,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:27,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 20:43:27,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-21 20:43:27,432 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 365 flow. Second operand 8 states and 153 transitions. [2024-06-21 20:43:27,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 88 transitions, 618 flow [2024-06-21 20:43:27,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 566 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 20:43:27,436 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 382 flow [2024-06-21 20:43:27,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=382, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2024-06-21 20:43:27,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-21 20:43:27,437 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 382 flow [2024-06-21 20:43:27,437 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) [2024-06-21 20:43:27,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:27,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:27,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:43:27,438 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:27,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:27,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1304265577, now seen corresponding path program 1 times [2024-06-21 20:43:27,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:27,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57784144] [2024-06-21 20:43:27,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:27,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:27,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:27,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57784144] [2024-06-21 20:43:27,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57784144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:27,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:27,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:43:27,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298303390] [2024-06-21 20:43:27,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:27,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:43:27,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:27,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:43:27,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:43:28,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:43:28,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 382 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:28,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:28,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:43:28,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:28,343 INFO L124 PetriNetUnfolderBase]: 1358/2143 cut-off events. [2024-06-21 20:43:28,344 INFO L125 PetriNetUnfolderBase]: For 11573/11573 co-relation queries the response was YES. [2024-06-21 20:43:28,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8462 conditions, 2143 events. 1358/2143 cut-off events. For 11573/11573 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10489 event pairs, 519 based on Foata normal form. 1/2141 useless extension candidates. Maximal degree in co-relation 8435. Up to 2024 conditions per place. [2024-06-21 20:43:28,355 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 62 selfloop transitions, 8 changer transitions 0/75 dead transitions. [2024-06-21 20:43:28,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 75 transitions, 565 flow [2024-06-21 20:43:28,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:43:28,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:43:28,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-21 20:43:28,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-21 20:43:28,356 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 382 flow. Second operand 5 states and 91 transitions. [2024-06-21 20:43:28,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 75 transitions, 565 flow [2024-06-21 20:43:28,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 514 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 20:43:28,361 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 379 flow [2024-06-21 20:43:28,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=379, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-21 20:43:28,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-21 20:43:28,363 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 379 flow [2024-06-21 20:43:28,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:28,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:28,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:28,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:43:28,364 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:28,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:28,364 INFO L85 PathProgramCache]: Analyzing trace with hash 87629908, now seen corresponding path program 1 times [2024-06-21 20:43:28,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:28,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392801648] [2024-06-21 20:43:28,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:28,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:29,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:29,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392801648] [2024-06-21 20:43:29,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392801648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:29,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:29,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:29,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245461646] [2024-06-21 20:43:29,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:29,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:29,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:29,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:29,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:29,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:43:29,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 379 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:29,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:29,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:43:29,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:29,821 INFO L124 PetriNetUnfolderBase]: 1460/2264 cut-off events. [2024-06-21 20:43:29,821 INFO L125 PetriNetUnfolderBase]: For 15951/15951 co-relation queries the response was YES. [2024-06-21 20:43:29,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9571 conditions, 2264 events. 1460/2264 cut-off events. For 15951/15951 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10948 event pairs, 514 based on Foata normal form. 4/2265 useless extension candidates. Maximal degree in co-relation 9543. Up to 2066 conditions per place. [2024-06-21 20:43:29,831 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 76 selfloop transitions, 19 changer transitions 0/101 dead transitions. [2024-06-21 20:43:29,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 101 transitions, 694 flow [2024-06-21 20:43:29,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:29,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:29,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:43:29,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:43:29,832 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 379 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:43:29,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 101 transitions, 694 flow [2024-06-21 20:43:29,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 101 transitions, 668 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 20:43:29,838 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 464 flow [2024-06-21 20:43:29,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=464, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-06-21 20:43:29,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-21 20:43:29,838 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 464 flow [2024-06-21 20:43:29,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:29,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:29,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:29,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:43:29,839 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:29,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:29,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1283739732, now seen corresponding path program 2 times [2024-06-21 20:43:29,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:29,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706796331] [2024-06-21 20:43:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:29,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:30,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:30,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706796331] [2024-06-21 20:43:30,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706796331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:30,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:30,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:30,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149415133] [2024-06-21 20:43:30,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:30,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:30,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:30,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:30,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:30,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:43:30,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 464 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:30,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:30,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:43:30,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:31,345 INFO L124 PetriNetUnfolderBase]: 1504/2330 cut-off events. [2024-06-21 20:43:31,346 INFO L125 PetriNetUnfolderBase]: For 19567/19570 co-relation queries the response was YES. [2024-06-21 20:43:31,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10657 conditions, 2330 events. 1504/2330 cut-off events. For 19567/19570 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11293 event pairs, 521 based on Foata normal form. 6/2331 useless extension candidates. Maximal degree in co-relation 10627. Up to 2053 conditions per place. [2024-06-21 20:43:31,363 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 72 selfloop transitions, 29 changer transitions 0/107 dead transitions. [2024-06-21 20:43:31,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 107 transitions, 804 flow [2024-06-21 20:43:31,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:31,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:31,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:43:31,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-21 20:43:31,365 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 464 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:43:31,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 107 transitions, 804 flow [2024-06-21 20:43:31,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 107 transitions, 741 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:43:31,381 INFO L231 Difference]: Finished difference. Result has 78 places, 82 transitions, 548 flow [2024-06-21 20:43:31,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=548, PETRI_PLACES=78, PETRI_TRANSITIONS=82} [2024-06-21 20:43:31,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-21 20:43:31,382 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 82 transitions, 548 flow [2024-06-21 20:43:31,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:31,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:31,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:31,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:43:31,382 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:31,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:31,382 INFO L85 PathProgramCache]: Analyzing trace with hash 864702626, now seen corresponding path program 3 times [2024-06-21 20:43:31,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:31,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855810846] [2024-06-21 20:43:31,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:31,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:32,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:32,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855810846] [2024-06-21 20:43:32,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855810846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:32,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:32,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:32,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116743348] [2024-06-21 20:43:32,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:32,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:32,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:32,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:32,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:32,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:43:32,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 82 transitions, 548 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:32,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:32,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:43:32,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:32,925 INFO L124 PetriNetUnfolderBase]: 1510/2339 cut-off events. [2024-06-21 20:43:32,926 INFO L125 PetriNetUnfolderBase]: For 23522/23525 co-relation queries the response was YES. [2024-06-21 20:43:32,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11474 conditions, 2339 events. 1510/2339 cut-off events. For 23522/23525 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11320 event pairs, 516 based on Foata normal form. 6/2340 useless extension candidates. Maximal degree in co-relation 11442. Up to 2012 conditions per place. [2024-06-21 20:43:32,940 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 68 selfloop transitions, 43 changer transitions 0/117 dead transitions. [2024-06-21 20:43:32,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 928 flow [2024-06-21 20:43:32,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:32,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 20:43:32,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-21 20:43:32,942 INFO L175 Difference]: Start difference. First operand has 78 places, 82 transitions, 548 flow. Second operand 9 states and 172 transitions. [2024-06-21 20:43:32,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 928 flow [2024-06-21 20:43:32,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 117 transitions, 831 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 20:43:32,952 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 623 flow [2024-06-21 20:43:32,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=623, PETRI_PLACES=82, PETRI_TRANSITIONS=88} [2024-06-21 20:43:32,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-21 20:43:32,953 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 623 flow [2024-06-21 20:43:32,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:32,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:32,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:32,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:43:32,953 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:32,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:32,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1777525919, now seen corresponding path program 1 times [2024-06-21 20:43:32,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:32,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037822165] [2024-06-21 20:43:32,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:32,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:32,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:33,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:33,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037822165] [2024-06-21 20:43:33,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037822165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:33,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:33,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:43:33,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62583982] [2024-06-21 20:43:33,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:33,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:43:33,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:33,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:43:33,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:43:33,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:43:33,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 88 transitions, 623 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:33,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:33,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:43:33,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:34,056 INFO L124 PetriNetUnfolderBase]: 1424/2239 cut-off events. [2024-06-21 20:43:34,065 INFO L125 PetriNetUnfolderBase]: For 23091/23091 co-relation queries the response was YES. [2024-06-21 20:43:34,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11234 conditions, 2239 events. 1424/2239 cut-off events. For 23091/23091 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10906 event pairs, 484 based on Foata normal form. 2/2238 useless extension candidates. Maximal degree in co-relation 11201. Up to 2115 conditions per place. [2024-06-21 20:43:34,078 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 85 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2024-06-21 20:43:34,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 101 transitions, 866 flow [2024-06-21 20:43:34,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:43:34,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:43:34,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 20:43:34,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 20:43:34,080 INFO L175 Difference]: Start difference. First operand has 82 places, 88 transitions, 623 flow. Second operand 6 states and 106 transitions. [2024-06-21 20:43:34,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 101 transitions, 866 flow [2024-06-21 20:43:34,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 101 transitions, 754 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 20:43:34,089 INFO L231 Difference]: Finished difference. Result has 83 places, 91 transitions, 569 flow [2024-06-21 20:43:34,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=569, PETRI_PLACES=83, PETRI_TRANSITIONS=91} [2024-06-21 20:43:34,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-21 20:43:34,089 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 91 transitions, 569 flow [2024-06-21 20:43:34,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:34,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:34,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:34,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:43:34,090 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:34,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:34,090 INFO L85 PathProgramCache]: Analyzing trace with hash 745520428, now seen corresponding path program 1 times [2024-06-21 20:43:34,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:34,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218697177] [2024-06-21 20:43:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:34,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:34,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:34,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218697177] [2024-06-21 20:43:34,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218697177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:34,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:34,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:34,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920607627] [2024-06-21 20:43:34,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:34,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:34,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:34,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:34,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:35,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:43:35,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 91 transitions, 569 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) [2024-06-21 20:43:35,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:35,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:43:35,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:35,543 INFO L124 PetriNetUnfolderBase]: 1457/2281 cut-off events. [2024-06-21 20:43:35,544 INFO L125 PetriNetUnfolderBase]: For 28842/28858 co-relation queries the response was YES. [2024-06-21 20:43:35,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12072 conditions, 2281 events. 1457/2281 cut-off events. For 28842/28858 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11408 event pairs, 347 based on Foata normal form. 4/2266 useless extension candidates. Maximal degree in co-relation 12038. Up to 2050 conditions per place. [2024-06-21 20:43:35,571 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 97 selfloop transitions, 16 changer transitions 0/123 dead transitions. [2024-06-21 20:43:35,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 123 transitions, 912 flow [2024-06-21 20:43:35,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:35,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:35,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 20:43:35,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-21 20:43:35,573 INFO L175 Difference]: Start difference. First operand has 83 places, 91 transitions, 569 flow. Second operand 8 states and 159 transitions. [2024-06-21 20:43:35,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 123 transitions, 912 flow [2024-06-21 20:43:35,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 123 transitions, 876 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 20:43:35,583 INFO L231 Difference]: Finished difference. Result has 87 places, 93 transitions, 612 flow [2024-06-21 20:43:35,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=612, PETRI_PLACES=87, PETRI_TRANSITIONS=93} [2024-06-21 20:43:35,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-21 20:43:35,584 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 93 transitions, 612 flow [2024-06-21 20:43:35,584 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) [2024-06-21 20:43:35,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:35,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:35,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:43:35,584 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:35,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:35,585 INFO L85 PathProgramCache]: Analyzing trace with hash 748377388, now seen corresponding path program 2 times [2024-06-21 20:43:35,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:35,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727168944] [2024-06-21 20:43:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:35,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:36,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:36,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727168944] [2024-06-21 20:43:36,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727168944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:36,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:36,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:36,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930720976] [2024-06-21 20:43:36,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:36,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:36,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:36,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:36,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:36,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:43:36,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 93 transitions, 612 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) [2024-06-21 20:43:36,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:36,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:43:36,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:37,185 INFO L124 PetriNetUnfolderBase]: 1458/2304 cut-off events. [2024-06-21 20:43:37,185 INFO L125 PetriNetUnfolderBase]: For 32771/32787 co-relation queries the response was YES. [2024-06-21 20:43:37,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12561 conditions, 2304 events. 1458/2304 cut-off events. For 32771/32787 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11693 event pairs, 432 based on Foata normal form. 4/2295 useless extension candidates. Maximal degree in co-relation 12526. Up to 2082 conditions per place. [2024-06-21 20:43:37,203 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 97 selfloop transitions, 17 changer transitions 0/124 dead transitions. [2024-06-21 20:43:37,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 124 transitions, 959 flow [2024-06-21 20:43:37,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:37,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:37,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 20:43:37,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-21 20:43:37,205 INFO L175 Difference]: Start difference. First operand has 87 places, 93 transitions, 612 flow. Second operand 8 states and 159 transitions. [2024-06-21 20:43:37,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 124 transitions, 959 flow [2024-06-21 20:43:37,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 124 transitions, 898 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 20:43:37,225 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 636 flow [2024-06-21 20:43:37,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=636, PETRI_PLACES=89, PETRI_TRANSITIONS=95} [2024-06-21 20:43:37,226 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-21 20:43:37,226 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 636 flow [2024-06-21 20:43:37,227 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) [2024-06-21 20:43:37,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:37,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:37,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:43:37,227 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:37,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:37,227 INFO L85 PathProgramCache]: Analyzing trace with hash -395849970, now seen corresponding path program 3 times [2024-06-21 20:43:37,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:37,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833126604] [2024-06-21 20:43:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:37,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:38,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:38,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833126604] [2024-06-21 20:43:38,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833126604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:38,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:38,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:38,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599956533] [2024-06-21 20:43:38,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:38,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:38,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:38,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:38,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:38,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:43:38,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 95 transitions, 636 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) [2024-06-21 20:43:38,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:38,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:43:38,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:38,666 INFO L124 PetriNetUnfolderBase]: 1491/2353 cut-off events. [2024-06-21 20:43:38,666 INFO L125 PetriNetUnfolderBase]: For 38577/38577 co-relation queries the response was YES. [2024-06-21 20:43:38,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13197 conditions, 2353 events. 1491/2353 cut-off events. For 38577/38577 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11960 event pairs, 413 based on Foata normal form. 8/2355 useless extension candidates. Maximal degree in co-relation 13161. Up to 2118 conditions per place. [2024-06-21 20:43:38,679 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 97 selfloop transitions, 20 changer transitions 0/127 dead transitions. [2024-06-21 20:43:38,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 127 transitions, 1009 flow [2024-06-21 20:43:38,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:38,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 20:43:38,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-21 20:43:38,683 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 636 flow. Second operand 8 states and 156 transitions. [2024-06-21 20:43:38,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 127 transitions, 1009 flow [2024-06-21 20:43:38,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 127 transitions, 942 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 20:43:38,709 INFO L231 Difference]: Finished difference. Result has 92 places, 101 transitions, 698 flow [2024-06-21 20:43:38,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=698, PETRI_PLACES=92, PETRI_TRANSITIONS=101} [2024-06-21 20:43:38,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-21 20:43:38,710 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 101 transitions, 698 flow [2024-06-21 20:43:38,710 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) [2024-06-21 20:43:38,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:38,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:38,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:43:38,710 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:38,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:38,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1693909546, now seen corresponding path program 1 times [2024-06-21 20:43:38,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:38,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530739611] [2024-06-21 20:43:38,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:38,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:39,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:39,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530739611] [2024-06-21 20:43:39,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530739611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:39,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:39,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:39,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809963829] [2024-06-21 20:43:39,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:39,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:39,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:39,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:39,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:40,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:43:40,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 101 transitions, 698 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:40,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:40,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:43:40,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:40,587 INFO L124 PetriNetUnfolderBase]: 1622/2526 cut-off events. [2024-06-21 20:43:40,587 INFO L125 PetriNetUnfolderBase]: For 42524/42524 co-relation queries the response was YES. [2024-06-21 20:43:40,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14213 conditions, 2526 events. 1622/2526 cut-off events. For 42524/42524 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12487 event pairs, 444 based on Foata normal form. 2/2525 useless extension candidates. Maximal degree in co-relation 14175. Up to 2330 conditions per place. [2024-06-21 20:43:40,601 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 112 selfloop transitions, 21 changer transitions 0/139 dead transitions. [2024-06-21 20:43:40,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 139 transitions, 1127 flow [2024-06-21 20:43:40,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:40,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:43:40,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-21 20:43:40,602 INFO L175 Difference]: Start difference. First operand has 92 places, 101 transitions, 698 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:43:40,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 139 transitions, 1127 flow [2024-06-21 20:43:40,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 139 transitions, 1054 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 20:43:40,620 INFO L231 Difference]: Finished difference. Result has 98 places, 107 transitions, 763 flow [2024-06-21 20:43:40,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=763, PETRI_PLACES=98, PETRI_TRANSITIONS=107} [2024-06-21 20:43:40,620 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-21 20:43:40,621 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 107 transitions, 763 flow [2024-06-21 20:43:40,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:40,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:40,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:40,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:43:40,621 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:40,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:40,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1578438886, now seen corresponding path program 2 times [2024-06-21 20:43:40,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:40,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663215370] [2024-06-21 20:43:40,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:40,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:41,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:41,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663215370] [2024-06-21 20:43:41,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663215370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:41,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:41,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:41,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911398799] [2024-06-21 20:43:41,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:41,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:41,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:41,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:41,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:41,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:43:41,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 107 transitions, 763 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:41,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:41,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:43:41,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:42,375 INFO L124 PetriNetUnfolderBase]: 1633/2542 cut-off events. [2024-06-21 20:43:42,376 INFO L125 PetriNetUnfolderBase]: For 47014/47014 co-relation queries the response was YES. [2024-06-21 20:43:42,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14767 conditions, 2542 events. 1633/2542 cut-off events. For 47014/47014 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12565 event pairs, 439 based on Foata normal form. 2/2541 useless extension candidates. Maximal degree in co-relation 14727. Up to 2278 conditions per place. [2024-06-21 20:43:42,392 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 100 selfloop transitions, 35 changer transitions 0/141 dead transitions. [2024-06-21 20:43:42,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 141 transitions, 1183 flow [2024-06-21 20:43:42,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:42,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:42,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:43:42,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 20:43:42,394 INFO L175 Difference]: Start difference. First operand has 98 places, 107 transitions, 763 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:43:42,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 141 transitions, 1183 flow [2024-06-21 20:43:42,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 141 transitions, 1089 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 20:43:42,415 INFO L231 Difference]: Finished difference. Result has 101 places, 110 transitions, 817 flow [2024-06-21 20:43:42,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=817, PETRI_PLACES=101, PETRI_TRANSITIONS=110} [2024-06-21 20:43:42,416 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-21 20:43:42,416 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 110 transitions, 817 flow [2024-06-21 20:43:42,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:42,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:42,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:42,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:43:42,416 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:42,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:42,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1578438638, now seen corresponding path program 1 times [2024-06-21 20:43:42,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:42,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568816558] [2024-06-21 20:43:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:42,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:43,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:43,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568816558] [2024-06-21 20:43:43,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568816558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:43,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:43,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:43,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860354266] [2024-06-21 20:43:43,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:43,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:43,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:43,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:43,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:43,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:43:43,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 110 transitions, 817 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:43,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:43,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:43:43,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:44,131 INFO L124 PetriNetUnfolderBase]: 1731/2700 cut-off events. [2024-06-21 20:43:44,131 INFO L125 PetriNetUnfolderBase]: For 58678/58678 co-relation queries the response was YES. [2024-06-21 20:43:44,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16149 conditions, 2700 events. 1731/2700 cut-off events. For 58678/58678 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13586 event pairs, 456 based on Foata normal form. 20/2714 useless extension candidates. Maximal degree in co-relation 16108. Up to 2351 conditions per place. [2024-06-21 20:43:44,148 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 117 selfloop transitions, 25 changer transitions 0/148 dead transitions. [2024-06-21 20:43:44,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 148 transitions, 1277 flow [2024-06-21 20:43:44,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:44,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:44,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:43:44,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-21 20:43:44,150 INFO L175 Difference]: Start difference. First operand has 101 places, 110 transitions, 817 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:43:44,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 148 transitions, 1277 flow [2024-06-21 20:43:44,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 148 transitions, 1153 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 20:43:44,170 INFO L231 Difference]: Finished difference. Result has 103 places, 113 transitions, 811 flow [2024-06-21 20:43:44,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=811, PETRI_PLACES=103, PETRI_TRANSITIONS=113} [2024-06-21 20:43:44,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 61 predicate places. [2024-06-21 20:43:44,171 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 113 transitions, 811 flow [2024-06-21 20:43:44,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:44,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:44,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:44,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:43:44,171 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:44,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:44,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1977626206, now seen corresponding path program 1 times [2024-06-21 20:43:44,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:44,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260041818] [2024-06-21 20:43:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:44,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:44,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:44,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260041818] [2024-06-21 20:43:44,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260041818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:44,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:44,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:43:44,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822602937] [2024-06-21 20:43:44,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:44,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:43:44,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:44,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:43:44,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:43:44,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:43:44,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 113 transitions, 811 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-21 20:43:44,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:44,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:43:44,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:45,300 INFO L124 PetriNetUnfolderBase]: 1854/2834 cut-off events. [2024-06-21 20:43:45,300 INFO L125 PetriNetUnfolderBase]: For 61345/61345 co-relation queries the response was YES. [2024-06-21 20:43:45,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17215 conditions, 2834 events. 1854/2834 cut-off events. For 61345/61345 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13886 event pairs, 496 based on Foata normal form. 2/2833 useless extension candidates. Maximal degree in co-relation 17173. Up to 2727 conditions per place. [2024-06-21 20:43:45,318 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 115 selfloop transitions, 18 changer transitions 0/137 dead transitions. [2024-06-21 20:43:45,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 137 transitions, 1262 flow [2024-06-21 20:43:45,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:43:45,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:43:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 20:43:45,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 20:43:45,320 INFO L175 Difference]: Start difference. First operand has 103 places, 113 transitions, 811 flow. Second operand 6 states and 111 transitions. [2024-06-21 20:43:45,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 137 transitions, 1262 flow [2024-06-21 20:43:45,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 137 transitions, 1202 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 20:43:45,345 INFO L231 Difference]: Finished difference. Result has 102 places, 119 transitions, 872 flow [2024-06-21 20:43:45,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=872, PETRI_PLACES=102, PETRI_TRANSITIONS=119} [2024-06-21 20:43:45,346 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-21 20:43:45,346 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 119 transitions, 872 flow [2024-06-21 20:43:45,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-21 20:43:45,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:45,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:45,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:43:45,347 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:45,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:45,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1141042840, now seen corresponding path program 4 times [2024-06-21 20:43:45,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:45,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285503007] [2024-06-21 20:43:45,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:45,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:46,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:46,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285503007] [2024-06-21 20:43:46,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285503007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:46,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:46,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:43:46,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637004878] [2024-06-21 20:43:46,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:46,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:43:46,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:46,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:43:46,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:43:46,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:43:46,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 119 transitions, 872 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) [2024-06-21 20:43:46,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:46,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:43:46,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:46,851 INFO L124 PetriNetUnfolderBase]: 1614/2563 cut-off events. [2024-06-21 20:43:46,851 INFO L125 PetriNetUnfolderBase]: For 64087/64090 co-relation queries the response was YES. [2024-06-21 20:43:46,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16096 conditions, 2563 events. 1614/2563 cut-off events. For 64087/64090 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13337 event pairs, 408 based on Foata normal form. 10/2563 useless extension candidates. Maximal degree in co-relation 16053. Up to 2253 conditions per place. [2024-06-21 20:43:46,867 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 100 selfloop transitions, 37 changer transitions 0/150 dead transitions. [2024-06-21 20:43:46,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 150 transitions, 1302 flow [2024-06-21 20:43:46,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:43:46,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:43:46,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 20:43:46,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-21 20:43:46,869 INFO L175 Difference]: Start difference. First operand has 102 places, 119 transitions, 872 flow. Second operand 8 states and 156 transitions. [2024-06-21 20:43:46,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 150 transitions, 1302 flow [2024-06-21 20:43:46,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 150 transitions, 1270 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 20:43:46,896 INFO L231 Difference]: Finished difference. Result has 109 places, 127 transitions, 1035 flow [2024-06-21 20:43:46,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1035, PETRI_PLACES=109, PETRI_TRANSITIONS=127} [2024-06-21 20:43:46,896 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-21 20:43:46,896 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 127 transitions, 1035 flow [2024-06-21 20:43:46,896 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) [2024-06-21 20:43:46,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:46,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:46,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:43:46,897 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:46,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:46,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1377402650, now seen corresponding path program 3 times [2024-06-21 20:43:46,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:46,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239761555] [2024-06-21 20:43:46,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:46,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:47,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:47,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239761555] [2024-06-21 20:43:47,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239761555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:47,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:47,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:47,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025956127] [2024-06-21 20:43:47,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:47,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:47,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:47,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:47,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:48,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:43:48,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 127 transitions, 1035 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:48,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:48,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:43:48,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:48,776 INFO L124 PetriNetUnfolderBase]: 1745/2719 cut-off events. [2024-06-21 20:43:48,777 INFO L125 PetriNetUnfolderBase]: For 70441/70444 co-relation queries the response was YES. [2024-06-21 20:43:48,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17386 conditions, 2719 events. 1745/2719 cut-off events. For 70441/70444 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13788 event pairs, 455 based on Foata normal form. 4/2718 useless extension candidates. Maximal degree in co-relation 17340. Up to 2344 conditions per place. [2024-06-21 20:43:48,795 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 105 selfloop transitions, 59 changer transitions 0/172 dead transitions. [2024-06-21 20:43:48,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 172 transitions, 1726 flow [2024-06-21 20:43:48,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:43:48,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:43:48,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-21 20:43:48,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458980044345898 [2024-06-21 20:43:48,801 INFO L175 Difference]: Start difference. First operand has 109 places, 127 transitions, 1035 flow. Second operand 11 states and 207 transitions. [2024-06-21 20:43:48,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 172 transitions, 1726 flow [2024-06-21 20:43:48,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 172 transitions, 1588 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-21 20:43:48,870 INFO L231 Difference]: Finished difference. Result has 117 places, 134 transitions, 1216 flow [2024-06-21 20:43:48,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1216, PETRI_PLACES=117, PETRI_TRANSITIONS=134} [2024-06-21 20:43:48,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-21 20:43:48,870 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 134 transitions, 1216 flow [2024-06-21 20:43:48,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:48,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:48,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:48,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:43:48,871 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:48,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:48,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1141227290, now seen corresponding path program 4 times [2024-06-21 20:43:48,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:48,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872328852] [2024-06-21 20:43:48,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:48,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:49,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:49,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872328852] [2024-06-21 20:43:49,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872328852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:49,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:49,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:49,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127474112] [2024-06-21 20:43:49,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:49,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:49,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:49,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:49,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:49,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:43:49,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 134 transitions, 1216 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:49,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:49,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:43:49,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:50,488 INFO L124 PetriNetUnfolderBase]: 1740/2715 cut-off events. [2024-06-21 20:43:50,488 INFO L125 PetriNetUnfolderBase]: For 74546/74546 co-relation queries the response was YES. [2024-06-21 20:43:50,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17614 conditions, 2715 events. 1740/2715 cut-off events. For 74546/74546 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13754 event pairs, 466 based on Foata normal form. 2/2711 useless extension candidates. Maximal degree in co-relation 17566. Up to 2374 conditions per place. [2024-06-21 20:43:50,507 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 106 selfloop transitions, 48 changer transitions 0/162 dead transitions. [2024-06-21 20:43:50,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 162 transitions, 1601 flow [2024-06-21 20:43:50,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:50,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 20:43:50,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-21 20:43:50,508 INFO L175 Difference]: Start difference. First operand has 117 places, 134 transitions, 1216 flow. Second operand 9 states and 172 transitions. [2024-06-21 20:43:50,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 162 transitions, 1601 flow [2024-06-21 20:43:50,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 162 transitions, 1433 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-21 20:43:50,559 INFO L231 Difference]: Finished difference. Result has 120 places, 134 transitions, 1152 flow [2024-06-21 20:43:50,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1152, PETRI_PLACES=120, PETRI_TRANSITIONS=134} [2024-06-21 20:43:50,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-21 20:43:50,560 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 134 transitions, 1152 flow [2024-06-21 20:43:50,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:50,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:50,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:50,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:43:50,562 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:50,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:50,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1377699568, now seen corresponding path program 2 times [2024-06-21 20:43:50,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:50,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589975119] [2024-06-21 20:43:50,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:50,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:51,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:51,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589975119] [2024-06-21 20:43:51,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589975119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:51,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:51,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:51,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163918512] [2024-06-21 20:43:51,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:51,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:51,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:51,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:51,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:51,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:43:51,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 134 transitions, 1152 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:51,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:51,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:43:51,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:52,213 INFO L124 PetriNetUnfolderBase]: 1860/2908 cut-off events. [2024-06-21 20:43:52,213 INFO L125 PetriNetUnfolderBase]: For 86025/86028 co-relation queries the response was YES. [2024-06-21 20:43:52,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19433 conditions, 2908 events. 1860/2908 cut-off events. For 86025/86028 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14957 event pairs, 454 based on Foata normal form. 6/2909 useless extension candidates. Maximal degree in co-relation 19383. Up to 2183 conditions per place. [2024-06-21 20:43:52,232 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 109 selfloop transitions, 59 changer transitions 0/176 dead transitions. [2024-06-21 20:43:52,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 176 transitions, 1834 flow [2024-06-21 20:43:52,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:52,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:52,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 20:43:52,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-21 20:43:52,234 INFO L175 Difference]: Start difference. First operand has 120 places, 134 transitions, 1152 flow. Second operand 9 states and 177 transitions. [2024-06-21 20:43:52,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 176 transitions, 1834 flow [2024-06-21 20:43:52,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 176 transitions, 1700 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 20:43:52,273 INFO L231 Difference]: Finished difference. Result has 122 places, 139 transitions, 1287 flow [2024-06-21 20:43:52,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1287, PETRI_PLACES=122, PETRI_TRANSITIONS=139} [2024-06-21 20:43:52,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-21 20:43:52,274 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 139 transitions, 1287 flow [2024-06-21 20:43:52,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:52,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:52,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:52,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:43:52,274 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:52,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:52,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1715624072, now seen corresponding path program 3 times [2024-06-21 20:43:52,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:52,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233180901] [2024-06-21 20:43:52,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:52,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:53,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:53,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233180901] [2024-06-21 20:43:53,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233180901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:53,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:53,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:53,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617499344] [2024-06-21 20:43:53,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:53,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:53,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:53,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:53,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:53,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:43:53,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 139 transitions, 1287 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:53,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:53,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:43:53,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:54,030 INFO L124 PetriNetUnfolderBase]: 1963/3076 cut-off events. [2024-06-21 20:43:54,031 INFO L125 PetriNetUnfolderBase]: For 102003/102006 co-relation queries the response was YES. [2024-06-21 20:43:54,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21086 conditions, 3076 events. 1963/3076 cut-off events. For 102003/102006 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16083 event pairs, 501 based on Foata normal form. 22/3093 useless extension candidates. Maximal degree in co-relation 21034. Up to 2642 conditions per place. [2024-06-21 20:43:54,049 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 127 selfloop transitions, 43 changer transitions 0/178 dead transitions. [2024-06-21 20:43:54,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 178 transitions, 1847 flow [2024-06-21 20:43:54,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:54,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:54,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 20:43:54,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-21 20:43:54,051 INFO L175 Difference]: Start difference. First operand has 122 places, 139 transitions, 1287 flow. Second operand 9 states and 174 transitions. [2024-06-21 20:43:54,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 178 transitions, 1847 flow [2024-06-21 20:43:54,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 178 transitions, 1689 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-21 20:43:54,105 INFO L231 Difference]: Finished difference. Result has 124 places, 145 transitions, 1339 flow [2024-06-21 20:43:54,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1339, PETRI_PLACES=124, PETRI_TRANSITIONS=145} [2024-06-21 20:43:54,105 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-21 20:43:54,106 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 145 transitions, 1339 flow [2024-06-21 20:43:54,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:54,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:54,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:54,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:43:54,106 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:54,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:54,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1377402898, now seen corresponding path program 4 times [2024-06-21 20:43:54,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:54,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274659354] [2024-06-21 20:43:54,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:54,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:55,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:55,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274659354] [2024-06-21 20:43:55,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274659354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:55,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:55,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:55,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233909627] [2024-06-21 20:43:55,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:55,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:55,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:55,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:55,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:55,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:43:55,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 145 transitions, 1339 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:55,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:55,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:43:55,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:55,835 INFO L124 PetriNetUnfolderBase]: 1980/3103 cut-off events. [2024-06-21 20:43:55,835 INFO L125 PetriNetUnfolderBase]: For 102293/102296 co-relation queries the response was YES. [2024-06-21 20:43:55,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21179 conditions, 3103 events. 1980/3103 cut-off events. For 102293/102296 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 16282 event pairs, 501 based on Foata normal form. 6/3104 useless extension candidates. Maximal degree in co-relation 21127. Up to 2597 conditions per place. [2024-06-21 20:43:55,858 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 117 selfloop transitions, 59 changer transitions 0/184 dead transitions. [2024-06-21 20:43:55,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 184 transitions, 1887 flow [2024-06-21 20:43:55,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:43:55,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:43:55,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 20:43:55,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47073170731707314 [2024-06-21 20:43:55,860 INFO L175 Difference]: Start difference. First operand has 124 places, 145 transitions, 1339 flow. Second operand 10 states and 193 transitions. [2024-06-21 20:43:55,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 184 transitions, 1887 flow [2024-06-21 20:43:55,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 184 transitions, 1795 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 20:43:55,925 INFO L231 Difference]: Finished difference. Result has 128 places, 147 transitions, 1444 flow [2024-06-21 20:43:55,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1444, PETRI_PLACES=128, PETRI_TRANSITIONS=147} [2024-06-21 20:43:55,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-21 20:43:55,926 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 147 transitions, 1444 flow [2024-06-21 20:43:55,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:55,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:55,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:55,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:43:55,926 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:55,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:55,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1141227538, now seen corresponding path program 5 times [2024-06-21 20:43:55,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:55,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723555362] [2024-06-21 20:43:55,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:55,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:56,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:56,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723555362] [2024-06-21 20:43:56,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723555362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:56,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:56,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:56,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48501243] [2024-06-21 20:43:56,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:56,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:56,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:56,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:56,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:57,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:43:57,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 147 transitions, 1444 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:57,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:57,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:43:57,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:57,566 INFO L124 PetriNetUnfolderBase]: 1944/3052 cut-off events. [2024-06-21 20:43:57,566 INFO L125 PetriNetUnfolderBase]: For 103744/103747 co-relation queries the response was YES. [2024-06-21 20:43:57,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20469 conditions, 3052 events. 1944/3052 cut-off events. For 103744/103747 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15966 event pairs, 483 based on Foata normal form. 22/3069 useless extension candidates. Maximal degree in co-relation 20416. Up to 2613 conditions per place. [2024-06-21 20:43:57,604 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 129 selfloop transitions, 42 changer transitions 0/179 dead transitions. [2024-06-21 20:43:57,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 179 transitions, 1906 flow [2024-06-21 20:43:57,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:57,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:57,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 20:43:57,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-21 20:43:57,610 INFO L175 Difference]: Start difference. First operand has 128 places, 147 transitions, 1444 flow. Second operand 9 states and 175 transitions. [2024-06-21 20:43:57,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 179 transitions, 1906 flow [2024-06-21 20:43:57,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 179 transitions, 1769 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 20:43:57,683 INFO L231 Difference]: Finished difference. Result has 129 places, 147 transitions, 1401 flow [2024-06-21 20:43:57,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1401, PETRI_PLACES=129, PETRI_TRANSITIONS=147} [2024-06-21 20:43:57,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-21 20:43:57,688 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 147 transitions, 1401 flow [2024-06-21 20:43:57,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:57,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:57,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:57,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:43:57,689 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:57,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:57,689 INFO L85 PathProgramCache]: Analyzing trace with hash 731258806, now seen corresponding path program 2 times [2024-06-21 20:43:57,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:57,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767510125] [2024-06-21 20:43:57,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:57,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:58,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:58,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767510125] [2024-06-21 20:43:58,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767510125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:58,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:58,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:43:58,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293324312] [2024-06-21 20:43:58,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:58,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:43:58,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:58,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:43:58,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:43:58,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:43:58,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 147 transitions, 1401 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-21 20:43:58,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:58,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:43:58,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:58,802 INFO L124 PetriNetUnfolderBase]: 2042/3146 cut-off events. [2024-06-21 20:43:58,802 INFO L125 PetriNetUnfolderBase]: For 100803/100803 co-relation queries the response was YES. [2024-06-21 20:43:58,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20945 conditions, 3146 events. 2042/3146 cut-off events. For 100803/100803 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16020 event pairs, 531 based on Foata normal form. 2/3142 useless extension candidates. Maximal degree in co-relation 20891. Up to 3042 conditions per place. [2024-06-21 20:43:58,823 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 136 selfloop transitions, 18 changer transitions 0/158 dead transitions. [2024-06-21 20:43:58,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 158 transitions, 1757 flow [2024-06-21 20:43:58,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:43:58,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:43:58,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 20:43:58,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 20:43:58,825 INFO L175 Difference]: Start difference. First operand has 129 places, 147 transitions, 1401 flow. Second operand 6 states and 105 transitions. [2024-06-21 20:43:58,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 158 transitions, 1757 flow [2024-06-21 20:43:58,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 158 transitions, 1617 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 20:43:58,888 INFO L231 Difference]: Finished difference. Result has 127 places, 147 transitions, 1303 flow [2024-06-21 20:43:58,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1303, PETRI_PLACES=127, PETRI_TRANSITIONS=147} [2024-06-21 20:43:58,889 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-21 20:43:58,889 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 147 transitions, 1303 flow [2024-06-21 20:43:58,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-21 20:43:58,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:58,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:58,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:43:58,889 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:58,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:58,890 INFO L85 PathProgramCache]: Analyzing trace with hash 725550838, now seen corresponding path program 1 times [2024-06-21 20:43:58,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:58,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442967831] [2024-06-21 20:43:58,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:58,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:59,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:59,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442967831] [2024-06-21 20:43:59,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442967831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:59,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:59,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:43:59,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572850641] [2024-06-21 20:43:59,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:59,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:43:59,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:59,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:43:59,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:43:59,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:43:59,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 147 transitions, 1303 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:59,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:59,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:43:59,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:00,024 INFO L124 PetriNetUnfolderBase]: 1843/2928 cut-off events. [2024-06-21 20:44:00,024 INFO L125 PetriNetUnfolderBase]: For 88003/88003 co-relation queries the response was YES. [2024-06-21 20:44:00,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18735 conditions, 2928 events. 1843/2928 cut-off events. For 88003/88003 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15365 event pairs, 444 based on Foata normal form. 1/2926 useless extension candidates. Maximal degree in co-relation 18680. Up to 2784 conditions per place. [2024-06-21 20:44:00,045 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 145 selfloop transitions, 16 changer transitions 0/166 dead transitions. [2024-06-21 20:44:00,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 166 transitions, 1778 flow [2024-06-21 20:44:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:44:00,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:44:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 20:44:00,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 20:44:00,047 INFO L175 Difference]: Start difference. First operand has 127 places, 147 transitions, 1303 flow. Second operand 6 states and 111 transitions. [2024-06-21 20:44:00,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 166 transitions, 1778 flow [2024-06-21 20:44:00,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 166 transitions, 1726 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:00,107 INFO L231 Difference]: Finished difference. Result has 128 places, 153 transitions, 1357 flow [2024-06-21 20:44:00,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1357, PETRI_PLACES=128, PETRI_TRANSITIONS=153} [2024-06-21 20:44:00,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-21 20:44:00,108 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 153 transitions, 1357 flow [2024-06-21 20:44:00,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:00,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:00,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:00,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:44:00,109 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:00,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:00,109 INFO L85 PathProgramCache]: Analyzing trace with hash 2019129688, now seen corresponding path program 2 times [2024-06-21 20:44:00,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:00,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664324412] [2024-06-21 20:44:00,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:00,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:00,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:00,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664324412] [2024-06-21 20:44:00,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664324412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:00,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:00,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:44:00,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057080321] [2024-06-21 20:44:00,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:00,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:44:00,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:00,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:44:00,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:44:00,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:00,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 153 transitions, 1357 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:00,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:00,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:00,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:01,274 INFO L124 PetriNetUnfolderBase]: 1840/2924 cut-off events. [2024-06-21 20:44:01,275 INFO L125 PetriNetUnfolderBase]: For 88218/88218 co-relation queries the response was YES. [2024-06-21 20:44:01,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18927 conditions, 2924 events. 1840/2924 cut-off events. For 88218/88218 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15348 event pairs, 443 based on Foata normal form. 1/2922 useless extension candidates. Maximal degree in co-relation 18871. Up to 2793 conditions per place. [2024-06-21 20:44:01,298 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 146 selfloop transitions, 11 changer transitions 0/162 dead transitions. [2024-06-21 20:44:01,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 162 transitions, 1696 flow [2024-06-21 20:44:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:44:01,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:44:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 20:44:01,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 20:44:01,300 INFO L175 Difference]: Start difference. First operand has 128 places, 153 transitions, 1357 flow. Second operand 6 states and 105 transitions. [2024-06-21 20:44:01,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 162 transitions, 1696 flow [2024-06-21 20:44:01,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 162 transitions, 1642 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-21 20:44:01,360 INFO L231 Difference]: Finished difference. Result has 132 places, 153 transitions, 1331 flow [2024-06-21 20:44:01,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1303, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1331, PETRI_PLACES=132, PETRI_TRANSITIONS=153} [2024-06-21 20:44:01,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-21 20:44:01,361 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 153 transitions, 1331 flow [2024-06-21 20:44:01,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:01,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:01,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:01,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:44:01,362 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:01,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:01,362 INFO L85 PathProgramCache]: Analyzing trace with hash -971586864, now seen corresponding path program 1 times [2024-06-21 20:44:01,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:01,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047838883] [2024-06-21 20:44:01,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:01,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:02,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:02,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047838883] [2024-06-21 20:44:02,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047838883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:02,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:02,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:02,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166130748] [2024-06-21 20:44:02,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:02,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:02,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:02,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:02,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:02,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:02,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 153 transitions, 1331 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:02,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:02,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:02,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:03,400 INFO L124 PetriNetUnfolderBase]: 2009/3162 cut-off events. [2024-06-21 20:44:03,400 INFO L125 PetriNetUnfolderBase]: For 116443/116443 co-relation queries the response was YES. [2024-06-21 20:44:03,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21326 conditions, 3162 events. 2009/3162 cut-off events. For 116443/116443 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16728 event pairs, 495 based on Foata normal form. 16/3170 useless extension candidates. Maximal degree in co-relation 21268. Up to 2858 conditions per place. [2024-06-21 20:44:03,428 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 162 selfloop transitions, 22 changer transitions 0/194 dead transitions. [2024-06-21 20:44:03,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 194 transitions, 1884 flow [2024-06-21 20:44:03,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:44:03,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:44:03,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 20:44:03,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-21 20:44:03,430 INFO L175 Difference]: Start difference. First operand has 132 places, 153 transitions, 1331 flow. Second operand 10 states and 188 transitions. [2024-06-21 20:44:03,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 194 transitions, 1884 flow [2024-06-21 20:44:03,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 194 transitions, 1850 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 20:44:03,495 INFO L231 Difference]: Finished difference. Result has 136 places, 154 transitions, 1394 flow [2024-06-21 20:44:03,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1394, PETRI_PLACES=136, PETRI_TRANSITIONS=154} [2024-06-21 20:44:03,496 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-21 20:44:03,496 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 154 transitions, 1394 flow [2024-06-21 20:44:03,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:03,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:03,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:03,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:44:03,497 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:03,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:03,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1686956260, now seen corresponding path program 2 times [2024-06-21 20:44:03,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:03,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724687186] [2024-06-21 20:44:03,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:03,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:04,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:04,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724687186] [2024-06-21 20:44:04,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724687186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:04,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:04,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:04,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993719059] [2024-06-21 20:44:04,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:04,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:04,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:04,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:04,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:04,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:04,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 154 transitions, 1394 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:04,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:04,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:04,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:05,414 INFO L124 PetriNetUnfolderBase]: 2184/3462 cut-off events. [2024-06-21 20:44:05,414 INFO L125 PetriNetUnfolderBase]: For 135297/135297 co-relation queries the response was YES. [2024-06-21 20:44:05,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24162 conditions, 3462 events. 2184/3462 cut-off events. For 135297/135297 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18864 event pairs, 529 based on Foata normal form. 12/3463 useless extension candidates. Maximal degree in co-relation 24104. Up to 2778 conditions per place. [2024-06-21 20:44:05,439 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 156 selfloop transitions, 41 changer transitions 0/207 dead transitions. [2024-06-21 20:44:05,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 207 transitions, 2207 flow [2024-06-21 20:44:05,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:44:05,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:44:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-21 20:44:05,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700665188470067 [2024-06-21 20:44:05,440 INFO L175 Difference]: Start difference. First operand has 136 places, 154 transitions, 1394 flow. Second operand 11 states and 212 transitions. [2024-06-21 20:44:05,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 207 transitions, 2207 flow [2024-06-21 20:44:05,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 207 transitions, 2146 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 20:44:05,521 INFO L231 Difference]: Finished difference. Result has 140 places, 157 transitions, 1555 flow [2024-06-21 20:44:05,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1555, PETRI_PLACES=140, PETRI_TRANSITIONS=157} [2024-06-21 20:44:05,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-21 20:44:05,522 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 157 transitions, 1555 flow [2024-06-21 20:44:05,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:05,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:05,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:05,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:44:05,523 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:05,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:05,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1686963700, now seen corresponding path program 3 times [2024-06-21 20:44:05,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:05,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853521357] [2024-06-21 20:44:05,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:05,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:06,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:06,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853521357] [2024-06-21 20:44:06,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853521357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:06,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:06,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:06,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776575783] [2024-06-21 20:44:06,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:06,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:06,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:06,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:06,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:06,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:06,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 157 transitions, 1555 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:06,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:06,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:06,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:07,324 INFO L124 PetriNetUnfolderBase]: 2149/3409 cut-off events. [2024-06-21 20:44:07,325 INFO L125 PetriNetUnfolderBase]: For 135221/135221 co-relation queries the response was YES. [2024-06-21 20:44:07,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23559 conditions, 3409 events. 2149/3409 cut-off events. For 135221/135221 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18550 event pairs, 532 based on Foata normal form. 16/3422 useless extension candidates. Maximal degree in co-relation 23499. Up to 3030 conditions per place. [2024-06-21 20:44:07,349 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 150 selfloop transitions, 36 changer transitions 0/196 dead transitions. [2024-06-21 20:44:07,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 196 transitions, 2066 flow [2024-06-21 20:44:07,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:44:07,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:44:07,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 20:44:07,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-21 20:44:07,351 INFO L175 Difference]: Start difference. First operand has 140 places, 157 transitions, 1555 flow. Second operand 10 states and 189 transitions. [2024-06-21 20:44:07,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 196 transitions, 2066 flow [2024-06-21 20:44:07,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 196 transitions, 1977 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 20:44:07,462 INFO L231 Difference]: Finished difference. Result has 143 places, 157 transitions, 1545 flow [2024-06-21 20:44:07,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1545, PETRI_PLACES=143, PETRI_TRANSITIONS=157} [2024-06-21 20:44:07,462 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-21 20:44:07,463 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 157 transitions, 1545 flow [2024-06-21 20:44:07,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:07,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:07,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:07,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:44:07,463 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:07,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:07,464 INFO L85 PathProgramCache]: Analyzing trace with hash 839924770, now seen corresponding path program 1 times [2024-06-21 20:44:07,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:07,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814676493] [2024-06-21 20:44:07,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:07,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:08,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:08,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814676493] [2024-06-21 20:44:08,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814676493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:08,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:08,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:44:08,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993512814] [2024-06-21 20:44:08,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:08,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:44:08,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:08,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:44:08,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:44:08,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:44:08,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 157 transitions, 1545 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:08,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:08,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:44:08,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:08,780 INFO L124 PetriNetUnfolderBase]: 2252/3523 cut-off events. [2024-06-21 20:44:08,780 INFO L125 PetriNetUnfolderBase]: For 131439/131439 co-relation queries the response was YES. [2024-06-21 20:44:08,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24176 conditions, 3523 events. 2252/3523 cut-off events. For 131439/131439 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18841 event pairs, 576 based on Foata normal form. 2/3522 useless extension candidates. Maximal degree in co-relation 24114. Up to 3373 conditions per place. [2024-06-21 20:44:08,808 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 157 selfloop transitions, 25 changer transitions 0/186 dead transitions. [2024-06-21 20:44:08,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 186 transitions, 2148 flow [2024-06-21 20:44:08,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:44:08,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:44:08,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 20:44:08,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-21 20:44:08,810 INFO L175 Difference]: Start difference. First operand has 143 places, 157 transitions, 1545 flow. Second operand 7 states and 127 transitions. [2024-06-21 20:44:08,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 186 transitions, 2148 flow [2024-06-21 20:44:08,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 186 transitions, 2073 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 20:44:08,908 INFO L231 Difference]: Finished difference. Result has 143 places, 166 transitions, 1634 flow [2024-06-21 20:44:08,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1470, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1634, PETRI_PLACES=143, PETRI_TRANSITIONS=166} [2024-06-21 20:44:08,909 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-21 20:44:08,909 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 166 transitions, 1634 flow [2024-06-21 20:44:08,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:08,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:08,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:08,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:44:08,910 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:08,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:08,910 INFO L85 PathProgramCache]: Analyzing trace with hash -250181860, now seen corresponding path program 4 times [2024-06-21 20:44:08,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:08,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781720862] [2024-06-21 20:44:08,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:08,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:09,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:09,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:09,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781720862] [2024-06-21 20:44:09,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781720862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:09,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:09,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:09,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787068514] [2024-06-21 20:44:09,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:09,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:09,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:09,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:09,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:10,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:10,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 166 transitions, 1634 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:10,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:10,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:10,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:10,932 INFO L124 PetriNetUnfolderBase]: 2295/3666 cut-off events. [2024-06-21 20:44:10,932 INFO L125 PetriNetUnfolderBase]: For 157742/157753 co-relation queries the response was YES. [2024-06-21 20:44:10,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26311 conditions, 3666 events. 2295/3666 cut-off events. For 157742/157753 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 20531 event pairs, 559 based on Foata normal form. 14/3670 useless extension candidates. Maximal degree in co-relation 26247. Up to 2988 conditions per place. [2024-06-21 20:44:10,967 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 132 selfloop transitions, 77 changer transitions 0/219 dead transitions. [2024-06-21 20:44:10,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 219 transitions, 2471 flow [2024-06-21 20:44:10,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:44:10,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:44:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-21 20:44:10,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4745011086474501 [2024-06-21 20:44:10,969 INFO L175 Difference]: Start difference. First operand has 143 places, 166 transitions, 1634 flow. Second operand 11 states and 214 transitions. [2024-06-21 20:44:10,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 219 transitions, 2471 flow [2024-06-21 20:44:11,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 219 transitions, 2436 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-21 20:44:11,103 INFO L231 Difference]: Finished difference. Result has 152 places, 171 transitions, 1872 flow [2024-06-21 20:44:11,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1599, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1872, PETRI_PLACES=152, PETRI_TRANSITIONS=171} [2024-06-21 20:44:11,104 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-21 20:44:11,104 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 171 transitions, 1872 flow [2024-06-21 20:44:11,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:11,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:11,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:11,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:44:11,104 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:11,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:11,105 INFO L85 PathProgramCache]: Analyzing trace with hash -250189300, now seen corresponding path program 5 times [2024-06-21 20:44:11,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:11,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927416512] [2024-06-21 20:44:11,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:11,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:12,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:12,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927416512] [2024-06-21 20:44:12,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927416512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:12,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:12,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:12,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611216482] [2024-06-21 20:44:12,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:12,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:12,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:12,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:12,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:12,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:12,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 171 transitions, 1872 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:12,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:12,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:12,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:13,414 INFO L124 PetriNetUnfolderBase]: 2325/3720 cut-off events. [2024-06-21 20:44:13,414 INFO L125 PetriNetUnfolderBase]: For 173015/173026 co-relation queries the response was YES. [2024-06-21 20:44:13,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26793 conditions, 3720 events. 2325/3720 cut-off events. For 173015/173026 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 20995 event pairs, 568 based on Foata normal form. 34/3744 useless extension candidates. Maximal degree in co-relation 26726. Up to 3097 conditions per place. [2024-06-21 20:44:13,443 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 138 selfloop transitions, 69 changer transitions 0/217 dead transitions. [2024-06-21 20:44:13,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 217 transitions, 2492 flow [2024-06-21 20:44:13,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:44:13,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:44:13,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 225 transitions. [2024-06-21 20:44:13,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-21 20:44:13,444 INFO L175 Difference]: Start difference. First operand has 152 places, 171 transitions, 1872 flow. Second operand 12 states and 225 transitions. [2024-06-21 20:44:13,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 217 transitions, 2492 flow [2024-06-21 20:44:13,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 217 transitions, 2378 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 20:44:13,575 INFO L231 Difference]: Finished difference. Result has 158 places, 173 transitions, 1967 flow [2024-06-21 20:44:13,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1967, PETRI_PLACES=158, PETRI_TRANSITIONS=173} [2024-06-21 20:44:13,576 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-21 20:44:13,576 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 173 transitions, 1967 flow [2024-06-21 20:44:13,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:13,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:13,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:13,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:44:13,577 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:13,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:13,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1910437222, now seen corresponding path program 6 times [2024-06-21 20:44:13,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:13,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412665310] [2024-06-21 20:44:13,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:13,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:14,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:14,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412665310] [2024-06-21 20:44:14,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412665310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:14,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:14,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:14,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244537285] [2024-06-21 20:44:14,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:14,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:14,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:14,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:14,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:14,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:14,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 173 transitions, 1967 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:14,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:14,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:14,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:15,648 INFO L124 PetriNetUnfolderBase]: 2509/4046 cut-off events. [2024-06-21 20:44:15,648 INFO L125 PetriNetUnfolderBase]: For 181039/181050 co-relation queries the response was YES. [2024-06-21 20:44:15,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29505 conditions, 4046 events. 2509/4046 cut-off events. For 181039/181050 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 23339 event pairs, 569 based on Foata normal form. 14/4050 useless extension candidates. Maximal degree in co-relation 29437. Up to 2461 conditions per place. [2024-06-21 20:44:15,684 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 128 selfloop transitions, 88 changer transitions 0/226 dead transitions. [2024-06-21 20:44:15,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 226 transitions, 2882 flow [2024-06-21 20:44:15,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:44:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:44:15,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-21 20:44:15,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4745011086474501 [2024-06-21 20:44:15,686 INFO L175 Difference]: Start difference. First operand has 158 places, 173 transitions, 1967 flow. Second operand 11 states and 214 transitions. [2024-06-21 20:44:15,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 226 transitions, 2882 flow [2024-06-21 20:44:15,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 226 transitions, 2733 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 20:44:15,857 INFO L231 Difference]: Finished difference. Result has 160 places, 177 transitions, 2202 flow [2024-06-21 20:44:15,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2202, PETRI_PLACES=160, PETRI_TRANSITIONS=177} [2024-06-21 20:44:15,858 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-21 20:44:15,858 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 177 transitions, 2202 flow [2024-06-21 20:44:15,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:15,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:15,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:15,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:44:15,859 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:15,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:15,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1644739942, now seen corresponding path program 7 times [2024-06-21 20:44:15,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:15,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210780990] [2024-06-21 20:44:15,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:15,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:16,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:16,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210780990] [2024-06-21 20:44:16,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210780990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:16,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:16,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:16,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454419779] [2024-06-21 20:44:16,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:16,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:16,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:16,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:16,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:17,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:17,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 177 transitions, 2202 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:17,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:17,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:17,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:17,865 INFO L124 PetriNetUnfolderBase]: 2550/4127 cut-off events. [2024-06-21 20:44:17,866 INFO L125 PetriNetUnfolderBase]: For 191261/191272 co-relation queries the response was YES. [2024-06-21 20:44:17,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30621 conditions, 4127 events. 2550/4127 cut-off events. For 191261/191272 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 24157 event pairs, 642 based on Foata normal form. 14/4131 useless extension candidates. Maximal degree in co-relation 30551. Up to 3463 conditions per place. [2024-06-21 20:44:17,903 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 159 selfloop transitions, 55 changer transitions 0/224 dead transitions. [2024-06-21 20:44:17,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 224 transitions, 2867 flow [2024-06-21 20:44:17,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:44:17,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:44:17,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-21 20:44:17,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678492239467849 [2024-06-21 20:44:17,905 INFO L175 Difference]: Start difference. First operand has 160 places, 177 transitions, 2202 flow. Second operand 11 states and 211 transitions. [2024-06-21 20:44:17,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 224 transitions, 2867 flow [2024-06-21 20:44:18,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 224 transitions, 2740 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 20:44:18,088 INFO L231 Difference]: Finished difference. Result has 164 places, 178 transitions, 2248 flow [2024-06-21 20:44:18,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2075, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2248, PETRI_PLACES=164, PETRI_TRANSITIONS=178} [2024-06-21 20:44:18,088 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-21 20:44:18,089 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 178 transitions, 2248 flow [2024-06-21 20:44:18,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:18,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:18,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:18,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:44:18,089 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:18,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:18,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1125228412, now seen corresponding path program 8 times [2024-06-21 20:44:18,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:18,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471477701] [2024-06-21 20:44:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:18,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:19,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:19,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471477701] [2024-06-21 20:44:19,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471477701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:19,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:19,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:19,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786080231] [2024-06-21 20:44:19,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:19,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:19,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:19,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:19,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:19,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:19,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 178 transitions, 2248 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:19,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:19,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:19,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:20,254 INFO L124 PetriNetUnfolderBase]: 2591/4203 cut-off events. [2024-06-21 20:44:20,255 INFO L125 PetriNetUnfolderBase]: For 201155/201166 co-relation queries the response was YES. [2024-06-21 20:44:20,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31420 conditions, 4203 events. 2591/4203 cut-off events. For 201155/201166 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 24768 event pairs, 652 based on Foata normal form. 14/4207 useless extension candidates. Maximal degree in co-relation 31348. Up to 3498 conditions per place. [2024-06-21 20:44:20,288 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 163 selfloop transitions, 53 changer transitions 0/226 dead transitions. [2024-06-21 20:44:20,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 226 transitions, 3057 flow [2024-06-21 20:44:20,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:44:20,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:44:20,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-21 20:44:20,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4745011086474501 [2024-06-21 20:44:20,290 INFO L175 Difference]: Start difference. First operand has 164 places, 178 transitions, 2248 flow. Second operand 11 states and 214 transitions. [2024-06-21 20:44:20,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 226 transitions, 3057 flow [2024-06-21 20:44:20,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 226 transitions, 2896 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 20:44:20,451 INFO L231 Difference]: Finished difference. Result has 167 places, 179 transitions, 2256 flow [2024-06-21 20:44:20,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2087, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2256, PETRI_PLACES=167, PETRI_TRANSITIONS=179} [2024-06-21 20:44:20,460 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-21 20:44:20,460 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 179 transitions, 2256 flow [2024-06-21 20:44:20,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:20,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:20,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:20,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:44:20,460 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:20,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:20,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1125235852, now seen corresponding path program 9 times [2024-06-21 20:44:20,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:20,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163182680] [2024-06-21 20:44:20,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:20,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:21,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:21,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:21,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163182680] [2024-06-21 20:44:21,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163182680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:21,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:21,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:21,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965207999] [2024-06-21 20:44:21,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:21,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:21,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:21,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:21,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:21,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:21,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 179 transitions, 2256 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:21,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:21,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:21,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:22,471 INFO L124 PetriNetUnfolderBase]: 2563/4159 cut-off events. [2024-06-21 20:44:22,471 INFO L125 PetriNetUnfolderBase]: For 200085/200096 co-relation queries the response was YES. [2024-06-21 20:44:22,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30436 conditions, 4159 events. 2563/4159 cut-off events. For 200085/200096 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 24500 event pairs, 656 based on Foata normal form. 18/4167 useless extension candidates. Maximal degree in co-relation 30363. Up to 3702 conditions per place. [2024-06-21 20:44:22,503 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 161 selfloop transitions, 43 changer transitions 0/214 dead transitions. [2024-06-21 20:44:22,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 214 transitions, 2792 flow [2024-06-21 20:44:22,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:44:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:44:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 20:44:22,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:44:22,505 INFO L175 Difference]: Start difference. First operand has 167 places, 179 transitions, 2256 flow. Second operand 10 states and 190 transitions. [2024-06-21 20:44:22,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 214 transitions, 2792 flow [2024-06-21 20:44:22,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 214 transitions, 2523 flow, removed 31 selfloop flow, removed 11 redundant places. [2024-06-21 20:44:22,687 INFO L231 Difference]: Finished difference. Result has 166 places, 179 transitions, 2080 flow [2024-06-21 20:44:22,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2080, PETRI_PLACES=166, PETRI_TRANSITIONS=179} [2024-06-21 20:44:22,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-21 20:44:22,688 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 179 transitions, 2080 flow [2024-06-21 20:44:22,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:22,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:22,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:22,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:44:22,688 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:22,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:22,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1194187810, now seen corresponding path program 2 times [2024-06-21 20:44:22,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:22,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751591509] [2024-06-21 20:44:22,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:22,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:23,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:23,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751591509] [2024-06-21 20:44:23,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751591509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:23,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:23,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:44:23,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970111844] [2024-06-21 20:44:23,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:23,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:44:23,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:23,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:44:23,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:44:23,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:44:23,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 179 transitions, 2080 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:23,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:23,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:44:23,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:24,098 INFO L124 PetriNetUnfolderBase]: 2668/4269 cut-off events. [2024-06-21 20:44:24,099 INFO L125 PetriNetUnfolderBase]: For 190388/190388 co-relation queries the response was YES. [2024-06-21 20:44:24,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30326 conditions, 4269 events. 2668/4269 cut-off events. For 190388/190388 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 24733 event pairs, 695 based on Foata normal form. 2/4265 useless extension candidates. Maximal degree in co-relation 30254. Up to 4080 conditions per place. [2024-06-21 20:44:24,137 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 164 selfloop transitions, 28 changer transitions 0/196 dead transitions. [2024-06-21 20:44:24,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 196 transitions, 2654 flow [2024-06-21 20:44:24,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:44:24,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:44:24,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 20:44:24,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-21 20:44:24,138 INFO L175 Difference]: Start difference. First operand has 166 places, 179 transitions, 2080 flow. Second operand 7 states and 122 transitions. [2024-06-21 20:44:24,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 196 transitions, 2654 flow [2024-06-21 20:44:24,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 196 transitions, 2569 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 20:44:24,341 INFO L231 Difference]: Finished difference. Result has 165 places, 182 transitions, 2103 flow [2024-06-21 20:44:24,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2103, PETRI_PLACES=165, PETRI_TRANSITIONS=182} [2024-06-21 20:44:24,342 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-21 20:44:24,342 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 182 transitions, 2103 flow [2024-06-21 20:44:24,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:24,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:24,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:24,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:44:24,347 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:24,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:24,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1194603520, now seen corresponding path program 3 times [2024-06-21 20:44:24,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:24,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373872188] [2024-06-21 20:44:24,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:24,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:24,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:24,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373872188] [2024-06-21 20:44:24,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373872188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:24,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:24,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:44:24,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871652289] [2024-06-21 20:44:24,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:24,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:44:24,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:24,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:44:24,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:44:25,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:44:25,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 182 transitions, 2103 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:25,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:25,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:44:25,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:25,818 INFO L124 PetriNetUnfolderBase]: 2662/4261 cut-off events. [2024-06-21 20:44:25,818 INFO L125 PetriNetUnfolderBase]: For 195605/195605 co-relation queries the response was YES. [2024-06-21 20:44:25,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30286 conditions, 4261 events. 2662/4261 cut-off events. For 195605/195605 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24668 event pairs, 694 based on Foata normal form. 2/4257 useless extension candidates. Maximal degree in co-relation 30213. Up to 4075 conditions per place. [2024-06-21 20:44:25,850 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 162 selfloop transitions, 29 changer transitions 0/195 dead transitions. [2024-06-21 20:44:25,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 195 transitions, 2547 flow [2024-06-21 20:44:25,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:44:25,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:44:25,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 20:44:25,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-21 20:44:25,852 INFO L175 Difference]: Start difference. First operand has 165 places, 182 transitions, 2103 flow. Second operand 7 states and 120 transitions. [2024-06-21 20:44:25,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 195 transitions, 2547 flow [2024-06-21 20:44:26,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 195 transitions, 2448 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 20:44:26,058 INFO L231 Difference]: Finished difference. Result has 168 places, 182 transitions, 2068 flow [2024-06-21 20:44:26,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2068, PETRI_PLACES=168, PETRI_TRANSITIONS=182} [2024-06-21 20:44:26,059 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-21 20:44:26,059 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 182 transitions, 2068 flow [2024-06-21 20:44:26,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:26,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:26,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:26,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:44:26,060 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:26,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:26,060 INFO L85 PathProgramCache]: Analyzing trace with hash -2031861144, now seen corresponding path program 1 times [2024-06-21 20:44:26,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:26,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691503540] [2024-06-21 20:44:26,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:26,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:26,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:26,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:26,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:26,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691503540] [2024-06-21 20:44:26,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691503540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:26,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:26,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:44:26,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421171909] [2024-06-21 20:44:26,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:26,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:44:26,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:26,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:44:26,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:44:26,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:26,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 182 transitions, 2068 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:26,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:26,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:26,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:27,592 INFO L124 PetriNetUnfolderBase]: 2525/4121 cut-off events. [2024-06-21 20:44:27,592 INFO L125 PetriNetUnfolderBase]: For 176747/176747 co-relation queries the response was YES. [2024-06-21 20:44:27,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28615 conditions, 4121 events. 2525/4121 cut-off events. For 176747/176747 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24444 event pairs, 612 based on Foata normal form. 1/4112 useless extension candidates. Maximal degree in co-relation 28541. Up to 3914 conditions per place. [2024-06-21 20:44:27,626 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 177 selfloop transitions, 16 changer transitions 0/202 dead transitions. [2024-06-21 20:44:27,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 202 transitions, 2548 flow [2024-06-21 20:44:27,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:44:27,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:44:27,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 20:44:27,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 20:44:27,628 INFO L175 Difference]: Start difference. First operand has 168 places, 182 transitions, 2068 flow. Second operand 8 states and 136 transitions. [2024-06-21 20:44:27,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 202 transitions, 2548 flow [2024-06-21 20:44:27,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 202 transitions, 2494 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:27,834 INFO L231 Difference]: Finished difference. Result has 172 places, 187 transitions, 2119 flow [2024-06-21 20:44:27,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2119, PETRI_PLACES=172, PETRI_TRANSITIONS=187} [2024-06-21 20:44:27,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-21 20:44:27,835 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 187 transitions, 2119 flow [2024-06-21 20:44:27,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:27,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:27,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:27,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:44:27,835 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:27,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:27,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1400207810, now seen corresponding path program 1 times [2024-06-21 20:44:27,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:27,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894869561] [2024-06-21 20:44:27,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:27,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:28,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:28,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:28,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894869561] [2024-06-21 20:44:28,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894869561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:28,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:28,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:44:28,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670152111] [2024-06-21 20:44:28,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:28,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:44:28,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:28,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:44:28,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:44:28,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:28,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 187 transitions, 2119 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:28,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:28,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:28,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:29,205 INFO L124 PetriNetUnfolderBase]: 2557/4167 cut-off events. [2024-06-21 20:44:29,205 INFO L125 PetriNetUnfolderBase]: For 186092/186092 co-relation queries the response was YES. [2024-06-21 20:44:29,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29324 conditions, 4167 events. 2557/4167 cut-off events. For 186092/186092 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 24729 event pairs, 613 based on Foata normal form. 2/4159 useless extension candidates. Maximal degree in co-relation 29248. Up to 3937 conditions per place. [2024-06-21 20:44:29,237 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 26 changer transitions 0/211 dead transitions. [2024-06-21 20:44:29,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 211 transitions, 2723 flow [2024-06-21 20:44:29,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:44:29,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:44:29,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 20:44:29,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-21 20:44:29,240 INFO L175 Difference]: Start difference. First operand has 172 places, 187 transitions, 2119 flow. Second operand 7 states and 129 transitions. [2024-06-21 20:44:29,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 211 transitions, 2723 flow [2024-06-21 20:44:29,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 211 transitions, 2661 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:29,460 INFO L231 Difference]: Finished difference. Result has 175 places, 196 transitions, 2216 flow [2024-06-21 20:44:29,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2216, PETRI_PLACES=175, PETRI_TRANSITIONS=196} [2024-06-21 20:44:29,460 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-21 20:44:29,460 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 196 transitions, 2216 flow [2024-06-21 20:44:29,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:29,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:29,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:29,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:44:29,461 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:29,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:29,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1017240616, now seen corresponding path program 2 times [2024-06-21 20:44:29,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:29,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271530620] [2024-06-21 20:44:29,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:29,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:30,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:30,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271530620] [2024-06-21 20:44:30,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271530620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:30,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:30,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:44:30,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612462673] [2024-06-21 20:44:30,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:30,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:44:30,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:30,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:44:30,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:44:30,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:30,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 196 transitions, 2216 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:30,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:30,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:30,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:30,784 INFO L124 PetriNetUnfolderBase]: 2562/4174 cut-off events. [2024-06-21 20:44:30,784 INFO L125 PetriNetUnfolderBase]: For 192806/192806 co-relation queries the response was YES. [2024-06-21 20:44:30,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29966 conditions, 4174 events. 2562/4174 cut-off events. For 192806/192806 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 24747 event pairs, 612 based on Foata normal form. 1/4165 useless extension candidates. Maximal degree in co-relation 29888. Up to 3949 conditions per place. [2024-06-21 20:44:30,822 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 179 selfloop transitions, 27 changer transitions 0/215 dead transitions. [2024-06-21 20:44:30,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 215 transitions, 2848 flow [2024-06-21 20:44:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:44:30,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:44:30,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 20:44:30,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-21 20:44:30,824 INFO L175 Difference]: Start difference. First operand has 175 places, 196 transitions, 2216 flow. Second operand 7 states and 127 transitions. [2024-06-21 20:44:30,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 215 transitions, 2848 flow [2024-06-21 20:44:31,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 215 transitions, 2806 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 20:44:31,042 INFO L231 Difference]: Finished difference. Result has 180 places, 202 transitions, 2340 flow [2024-06-21 20:44:31,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2174, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2340, PETRI_PLACES=180, PETRI_TRANSITIONS=202} [2024-06-21 20:44:31,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-21 20:44:31,043 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 202 transitions, 2340 flow [2024-06-21 20:44:31,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:31,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:31,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:31,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:44:31,044 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:31,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:31,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1831250658, now seen corresponding path program 2 times [2024-06-21 20:44:31,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:31,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302733628] [2024-06-21 20:44:31,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:31,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:31,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:31,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:31,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302733628] [2024-06-21 20:44:31,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302733628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:31,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:31,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:44:31,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366575542] [2024-06-21 20:44:31,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:31,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:44:31,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:31,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:44:31,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:44:31,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:31,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 202 transitions, 2340 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:31,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:31,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:31,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:32,413 INFO L124 PetriNetUnfolderBase]: 2563/4176 cut-off events. [2024-06-21 20:44:32,413 INFO L125 PetriNetUnfolderBase]: For 201647/201647 co-relation queries the response was YES. [2024-06-21 20:44:32,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30278 conditions, 4176 events. 2563/4176 cut-off events. For 201647/201647 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 24762 event pairs, 611 based on Foata normal form. 3/4169 useless extension candidates. Maximal degree in co-relation 30197. Up to 3971 conditions per place. [2024-06-21 20:44:32,450 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 189 selfloop transitions, 17 changer transitions 0/215 dead transitions. [2024-06-21 20:44:32,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 215 transitions, 2810 flow [2024-06-21 20:44:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:44:32,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:44:32,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 20:44:32,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-21 20:44:32,452 INFO L175 Difference]: Start difference. First operand has 180 places, 202 transitions, 2340 flow. Second operand 7 states and 120 transitions. [2024-06-21 20:44:32,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 215 transitions, 2810 flow [2024-06-21 20:44:32,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 215 transitions, 2747 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 20:44:32,644 INFO L231 Difference]: Finished difference. Result has 184 places, 205 transitions, 2356 flow [2024-06-21 20:44:32,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2277, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2356, PETRI_PLACES=184, PETRI_TRANSITIONS=205} [2024-06-21 20:44:32,644 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-21 20:44:32,645 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 205 transitions, 2356 flow [2024-06-21 20:44:32,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:32,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:32,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:32,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:44:32,645 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:32,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:32,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1194372136, now seen corresponding path program 3 times [2024-06-21 20:44:32,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:32,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884613297] [2024-06-21 20:44:32,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:32,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:33,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:33,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884613297] [2024-06-21 20:44:33,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884613297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:33,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:33,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:44:33,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694062616] [2024-06-21 20:44:33,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:33,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:44:33,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:33,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:44:33,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:44:33,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:33,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 205 transitions, 2356 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:33,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:33,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:33,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:33,862 INFO L124 PetriNetUnfolderBase]: 2560/4172 cut-off events. [2024-06-21 20:44:33,863 INFO L125 PetriNetUnfolderBase]: For 205244/205244 co-relation queries the response was YES. [2024-06-21 20:44:33,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30376 conditions, 4172 events. 2560/4172 cut-off events. For 205244/205244 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 24732 event pairs, 611 based on Foata normal form. 1/4163 useless extension candidates. Maximal degree in co-relation 30293. Up to 3973 conditions per place. [2024-06-21 20:44:33,898 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 190 selfloop transitions, 15 changer transitions 0/214 dead transitions. [2024-06-21 20:44:33,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 214 transitions, 2788 flow [2024-06-21 20:44:33,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:44:33,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:44:33,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 20:44:33,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 20:44:33,900 INFO L175 Difference]: Start difference. First operand has 184 places, 205 transitions, 2356 flow. Second operand 7 states and 119 transitions. [2024-06-21 20:44:33,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 214 transitions, 2788 flow [2024-06-21 20:44:34,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 214 transitions, 2702 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:34,144 INFO L231 Difference]: Finished difference. Result has 186 places, 205 transitions, 2306 flow [2024-06-21 20:44:34,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2270, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2306, PETRI_PLACES=186, PETRI_TRANSITIONS=205} [2024-06-21 20:44:34,145 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-21 20:44:34,145 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 205 transitions, 2306 flow [2024-06-21 20:44:34,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:34,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:34,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:34,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:44:34,145 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:34,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:34,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1194372322, now seen corresponding path program 3 times [2024-06-21 20:44:34,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:34,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124328209] [2024-06-21 20:44:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:34,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:34,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:34,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124328209] [2024-06-21 20:44:34,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124328209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:34,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:34,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:44:34,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419823827] [2024-06-21 20:44:34,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:34,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:44:34,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:34,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:44:34,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:44:34,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:34,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 205 transitions, 2306 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:34,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:34,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:34,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:35,488 INFO L124 PetriNetUnfolderBase]: 2554/4164 cut-off events. [2024-06-21 20:44:35,489 INFO L125 PetriNetUnfolderBase]: For 210331/210331 co-relation queries the response was YES. [2024-06-21 20:44:35,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30298 conditions, 4164 events. 2554/4164 cut-off events. For 210331/210331 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 24744 event pairs, 610 based on Foata normal form. 2/4156 useless extension candidates. Maximal degree in co-relation 30215. Up to 3950 conditions per place. [2024-06-21 20:44:35,524 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 185 selfloop transitions, 22 changer transitions 0/216 dead transitions. [2024-06-21 20:44:35,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 216 transitions, 2750 flow [2024-06-21 20:44:35,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:44:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:44:35,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 20:44:35,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 20:44:35,525 INFO L175 Difference]: Start difference. First operand has 186 places, 205 transitions, 2306 flow. Second operand 7 states and 123 transitions. [2024-06-21 20:44:35,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 216 transitions, 2750 flow [2024-06-21 20:44:35,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 216 transitions, 2688 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 20:44:35,776 INFO L231 Difference]: Finished difference. Result has 187 places, 205 transitions, 2294 flow [2024-06-21 20:44:35,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2244, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2294, PETRI_PLACES=187, PETRI_TRANSITIONS=205} [2024-06-21 20:44:35,776 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-21 20:44:35,777 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 205 transitions, 2294 flow [2024-06-21 20:44:35,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:35,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:35,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:35,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:44:35,777 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:35,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:35,777 INFO L85 PathProgramCache]: Analyzing trace with hash -542176755, now seen corresponding path program 1 times [2024-06-21 20:44:35,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:35,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551533661] [2024-06-21 20:44:35,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:35,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:36,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:36,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551533661] [2024-06-21 20:44:36,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551533661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:36,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:36,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:36,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251620621] [2024-06-21 20:44:36,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:36,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:36,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:36,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:36,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:37,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:37,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 205 transitions, 2294 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:37,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:37,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:37,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:37,822 INFO L124 PetriNetUnfolderBase]: 2665/4307 cut-off events. [2024-06-21 20:44:37,823 INFO L125 PetriNetUnfolderBase]: For 263180/263180 co-relation queries the response was YES. [2024-06-21 20:44:37,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32650 conditions, 4307 events. 2665/4307 cut-off events. For 263180/263180 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 25261 event pairs, 467 based on Foata normal form. 12/4306 useless extension candidates. Maximal degree in co-relation 32566. Up to 3929 conditions per place. [2024-06-21 20:44:37,861 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 216 selfloop transitions, 20 changer transitions 0/249 dead transitions. [2024-06-21 20:44:37,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 249 transitions, 2950 flow [2024-06-21 20:44:37,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:44:37,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:44:37,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-21 20:44:37,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-21 20:44:37,871 INFO L175 Difference]: Start difference. First operand has 187 places, 205 transitions, 2294 flow. Second operand 10 states and 187 transitions. [2024-06-21 20:44:37,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 249 transitions, 2950 flow [2024-06-21 20:44:38,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 249 transitions, 2883 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:44:38,170 INFO L231 Difference]: Finished difference. Result has 192 places, 208 transitions, 2346 flow [2024-06-21 20:44:38,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2227, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2346, PETRI_PLACES=192, PETRI_TRANSITIONS=208} [2024-06-21 20:44:38,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-21 20:44:38,171 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 208 transitions, 2346 flow [2024-06-21 20:44:38,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:38,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:38,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:38,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:44:38,172 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:38,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:38,172 INFO L85 PathProgramCache]: Analyzing trace with hash -54604745, now seen corresponding path program 2 times [2024-06-21 20:44:38,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:38,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796692791] [2024-06-21 20:44:38,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:38,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:39,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:39,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796692791] [2024-06-21 20:44:39,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796692791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:39,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:39,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:39,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482672810] [2024-06-21 20:44:39,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:39,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:39,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:39,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:39,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:39,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:39,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 208 transitions, 2346 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:39,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:39,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:39,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:40,298 INFO L124 PetriNetUnfolderBase]: 2718/4400 cut-off events. [2024-06-21 20:44:40,298 INFO L125 PetriNetUnfolderBase]: For 272765/272765 co-relation queries the response was YES. [2024-06-21 20:44:40,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33484 conditions, 4400 events. 2718/4400 cut-off events. For 272765/272765 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 26103 event pairs, 629 based on Foata normal form. 12/4405 useless extension candidates. Maximal degree in co-relation 33398. Up to 4058 conditions per place. [2024-06-21 20:44:40,337 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 215 selfloop transitions, 22 changer transitions 0/250 dead transitions. [2024-06-21 20:44:40,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 250 transitions, 2994 flow [2024-06-21 20:44:40,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:44:40,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:44:40,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-21 20:44:40,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-21 20:44:40,339 INFO L175 Difference]: Start difference. First operand has 192 places, 208 transitions, 2346 flow. Second operand 10 states and 187 transitions. [2024-06-21 20:44:40,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 250 transitions, 2994 flow [2024-06-21 20:44:40,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 250 transitions, 2914 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 20:44:40,635 INFO L231 Difference]: Finished difference. Result has 196 places, 211 transitions, 2385 flow [2024-06-21 20:44:40,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2385, PETRI_PLACES=196, PETRI_TRANSITIONS=211} [2024-06-21 20:44:40,636 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-21 20:44:40,636 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 211 transitions, 2385 flow [2024-06-21 20:44:40,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:40,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:40,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:40,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:44:40,636 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:40,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:40,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1931177803, now seen corresponding path program 3 times [2024-06-21 20:44:40,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:40,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84050244] [2024-06-21 20:44:40,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:40,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:41,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:41,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84050244] [2024-06-21 20:44:41,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84050244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:41,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:41,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:41,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464393850] [2024-06-21 20:44:41,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:41,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:41,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:41,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:41,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:42,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:42,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 211 transitions, 2385 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:42,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:42,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:42,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:43,004 INFO L124 PetriNetUnfolderBase]: 2864/4632 cut-off events. [2024-06-21 20:44:43,004 INFO L125 PetriNetUnfolderBase]: For 286278/286278 co-relation queries the response was YES. [2024-06-21 20:44:43,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34859 conditions, 4632 events. 2864/4632 cut-off events. For 286278/286278 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 27656 event pairs, 637 based on Foata normal form. 12/4623 useless extension candidates. Maximal degree in co-relation 34771. Up to 4233 conditions per place. [2024-06-21 20:44:43,053 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 224 selfloop transitions, 32 changer transitions 0/269 dead transitions. [2024-06-21 20:44:43,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 269 transitions, 3239 flow [2024-06-21 20:44:43,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:44:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:44:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-21 20:44:43,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434589800443459 [2024-06-21 20:44:43,055 INFO L175 Difference]: Start difference. First operand has 196 places, 211 transitions, 2385 flow. Second operand 11 states and 200 transitions. [2024-06-21 20:44:43,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 269 transitions, 3239 flow [2024-06-21 20:44:43,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 269 transitions, 3138 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 20:44:43,445 INFO L231 Difference]: Finished difference. Result has 205 places, 231 transitions, 2633 flow [2024-06-21 20:44:43,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2310, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2633, PETRI_PLACES=205, PETRI_TRANSITIONS=231} [2024-06-21 20:44:43,446 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-21 20:44:43,446 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 231 transitions, 2633 flow [2024-06-21 20:44:43,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:43,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:43,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:43,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:44:43,447 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:43,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:43,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1056842477, now seen corresponding path program 4 times [2024-06-21 20:44:43,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:43,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049217816] [2024-06-21 20:44:43,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:43,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:44,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:44,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049217816] [2024-06-21 20:44:44,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049217816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:44,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:44,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:44,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073393114] [2024-06-21 20:44:44,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:44,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:44,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:44,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:44,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:44,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:44,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 231 transitions, 2633 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:44,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:44,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:44,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:45,930 INFO L124 PetriNetUnfolderBase]: 2897/4695 cut-off events. [2024-06-21 20:44:45,930 INFO L125 PetriNetUnfolderBase]: For 297460/297460 co-relation queries the response was YES. [2024-06-21 20:44:45,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35528 conditions, 4695 events. 2897/4695 cut-off events. For 297460/297460 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 28115 event pairs, 649 based on Foata normal form. 12/4700 useless extension candidates. Maximal degree in co-relation 35434. Up to 4228 conditions per place. [2024-06-21 20:44:45,969 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 217 selfloop transitions, 43 changer transitions 0/273 dead transitions. [2024-06-21 20:44:45,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 273 transitions, 3347 flow [2024-06-21 20:44:45,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:44:45,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:44:45,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 20:44:45,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-21 20:44:45,971 INFO L175 Difference]: Start difference. First operand has 205 places, 231 transitions, 2633 flow. Second operand 10 states and 189 transitions. [2024-06-21 20:44:45,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 273 transitions, 3347 flow [2024-06-21 20:44:46,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 273 transitions, 3289 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-06-21 20:44:46,328 INFO L231 Difference]: Finished difference. Result has 215 places, 235 transitions, 2759 flow [2024-06-21 20:44:46,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2575, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2759, PETRI_PLACES=215, PETRI_TRANSITIONS=235} [2024-06-21 20:44:46,329 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-21 20:44:46,329 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 235 transitions, 2759 flow [2024-06-21 20:44:46,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:46,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:46,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:46,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:44:46,330 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:46,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:46,330 INFO L85 PathProgramCache]: Analyzing trace with hash 265600739, now seen corresponding path program 1 times [2024-06-21 20:44:46,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:46,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441030472] [2024-06-21 20:44:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:46,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:46,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:46,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441030472] [2024-06-21 20:44:46,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441030472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:46,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:46,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:44:46,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386835905] [2024-06-21 20:44:46,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:46,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:44:46,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:46,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:44:46,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:44:47,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:44:47,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 235 transitions, 2759 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:47,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:47,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:44:47,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:47,828 INFO L124 PetriNetUnfolderBase]: 3029/4856 cut-off events. [2024-06-21 20:44:47,828 INFO L125 PetriNetUnfolderBase]: For 298456/298459 co-relation queries the response was YES. [2024-06-21 20:44:47,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36748 conditions, 4856 events. 3029/4856 cut-off events. For 298456/298459 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28713 event pairs, 703 based on Foata normal form. 4/4855 useless extension candidates. Maximal degree in co-relation 36650. Up to 4664 conditions per place. [2024-06-21 20:44:47,868 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 237 selfloop transitions, 32 changer transitions 0/273 dead transitions. [2024-06-21 20:44:47,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 273 transitions, 3700 flow [2024-06-21 20:44:47,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:44:47,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:44:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 20:44:47,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-21 20:44:47,886 INFO L175 Difference]: Start difference. First operand has 215 places, 235 transitions, 2759 flow. Second operand 8 states and 138 transitions. [2024-06-21 20:44:47,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 273 transitions, 3700 flow [2024-06-21 20:44:48,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 273 transitions, 3554 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 20:44:48,196 INFO L231 Difference]: Finished difference. Result has 219 places, 253 transitions, 2968 flow [2024-06-21 20:44:48,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2621, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2968, PETRI_PLACES=219, PETRI_TRANSITIONS=253} [2024-06-21 20:44:48,197 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-21 20:44:48,197 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 253 transitions, 2968 flow [2024-06-21 20:44:48,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:48,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:48,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:48,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:44:48,197 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:48,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:48,198 INFO L85 PathProgramCache]: Analyzing trace with hash 271314659, now seen corresponding path program 2 times [2024-06-21 20:44:48,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:48,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279489667] [2024-06-21 20:44:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:48,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:48,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:48,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279489667] [2024-06-21 20:44:48,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279489667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:48,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:48,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:44:48,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015452978] [2024-06-21 20:44:48,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:48,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:44:48,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:48,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:44:48,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:44:48,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:44:48,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 253 transitions, 2968 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:48,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:48,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:44:48,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:49,724 INFO L124 PetriNetUnfolderBase]: 3039/4879 cut-off events. [2024-06-21 20:44:49,724 INFO L125 PetriNetUnfolderBase]: For 308873/308876 co-relation queries the response was YES. [2024-06-21 20:44:49,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37447 conditions, 4879 events. 3039/4879 cut-off events. For 308873/308876 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 28961 event pairs, 708 based on Foata normal form. 4/4878 useless extension candidates. Maximal degree in co-relation 37345. Up to 4709 conditions per place. [2024-06-21 20:44:49,853 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 240 selfloop transitions, 27 changer transitions 0/271 dead transitions. [2024-06-21 20:44:49,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 271 transitions, 3632 flow [2024-06-21 20:44:49,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:44:49,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:44:49,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 20:44:49,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 20:44:49,855 INFO L175 Difference]: Start difference. First operand has 219 places, 253 transitions, 2968 flow. Second operand 8 states and 132 transitions. [2024-06-21 20:44:49,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 271 transitions, 3632 flow [2024-06-21 20:44:50,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 271 transitions, 3504 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-21 20:44:50,231 INFO L231 Difference]: Finished difference. Result has 224 places, 257 transitions, 2986 flow [2024-06-21 20:44:50,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2872, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2986, PETRI_PLACES=224, PETRI_TRANSITIONS=257} [2024-06-21 20:44:50,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-21 20:44:50,231 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 257 transitions, 2986 flow [2024-06-21 20:44:50,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:50,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:50,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:50,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:44:50,232 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:50,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:50,233 INFO L85 PathProgramCache]: Analyzing trace with hash 271322595, now seen corresponding path program 1 times [2024-06-21 20:44:50,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:50,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174026441] [2024-06-21 20:44:50,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:50,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:50,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:50,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174026441] [2024-06-21 20:44:50,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174026441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:50,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:50,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:44:50,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195929046] [2024-06-21 20:44:50,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:50,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:44:50,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:50,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:44:50,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:44:51,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:44:51,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 257 transitions, 2986 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:44:51,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:51,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:44:51,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:52,198 INFO L124 PetriNetUnfolderBase]: 3059/4906 cut-off events. [2024-06-21 20:44:52,285 INFO L125 PetriNetUnfolderBase]: For 320701/320701 co-relation queries the response was YES. [2024-06-21 20:44:52,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37702 conditions, 4906 events. 3059/4906 cut-off events. For 320701/320701 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 29089 event pairs, 707 based on Foata normal form. 4/4907 useless extension candidates. Maximal degree in co-relation 37599. Up to 4624 conditions per place. [2024-06-21 20:44:52,334 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 232 selfloop transitions, 48 changer transitions 0/284 dead transitions. [2024-06-21 20:44:52,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 284 transitions, 3850 flow [2024-06-21 20:44:52,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:44:52,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:44:52,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 20:44:52,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 20:44:52,335 INFO L175 Difference]: Start difference. First operand has 224 places, 257 transitions, 2986 flow. Second operand 8 states and 146 transitions. [2024-06-21 20:44:52,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 284 transitions, 3850 flow [2024-06-21 20:44:52,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 284 transitions, 3768 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 20:44:52,756 INFO L231 Difference]: Finished difference. Result has 227 places, 263 transitions, 3112 flow [2024-06-21 20:44:52,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2904, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3112, PETRI_PLACES=227, PETRI_TRANSITIONS=263} [2024-06-21 20:44:52,756 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-21 20:44:52,756 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 263 transitions, 3112 flow [2024-06-21 20:44:52,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:44:52,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:52,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:52,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:44:52,757 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:52,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:52,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1325555127, now seen corresponding path program 5 times [2024-06-21 20:44:52,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:52,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110021937] [2024-06-21 20:44:52,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:52,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:53,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:53,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110021937] [2024-06-21 20:44:53,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110021937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:53,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:53,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:44:53,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600945937] [2024-06-21 20:44:53,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:53,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:44:53,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:53,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:44:53,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:44:54,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:44:54,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 263 transitions, 3112 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:54,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:54,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:44:54,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:55,127 INFO L124 PetriNetUnfolderBase]: 3021/4908 cut-off events. [2024-06-21 20:44:55,127 INFO L125 PetriNetUnfolderBase]: For 345549/345555 co-relation queries the response was YES. [2024-06-21 20:44:55,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38451 conditions, 4908 events. 3021/4908 cut-off events. For 345549/345555 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 29655 event pairs, 663 based on Foata normal form. 16/4917 useless extension candidates. Maximal degree in co-relation 38347. Up to 4348 conditions per place. [2024-06-21 20:44:55,173 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 233 selfloop transitions, 51 changer transitions 0/303 dead transitions. [2024-06-21 20:44:55,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 303 transitions, 3876 flow [2024-06-21 20:44:55,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:44:55,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:44:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 20:44:55,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-21 20:44:55,174 INFO L175 Difference]: Start difference. First operand has 227 places, 263 transitions, 3112 flow. Second operand 10 states and 188 transitions. [2024-06-21 20:44:55,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 303 transitions, 3876 flow [2024-06-21 20:44:55,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 303 transitions, 3804 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 20:44:55,576 INFO L231 Difference]: Finished difference. Result has 234 places, 267 transitions, 3251 flow [2024-06-21 20:44:55,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3040, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3251, PETRI_PLACES=234, PETRI_TRANSITIONS=267} [2024-06-21 20:44:55,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-21 20:44:55,577 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 267 transitions, 3251 flow [2024-06-21 20:44:55,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:55,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:55,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:55,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:44:55,581 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:55,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:55,581 INFO L85 PathProgramCache]: Analyzing trace with hash -457167653, now seen corresponding path program 3 times [2024-06-21 20:44:55,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:55,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844303099] [2024-06-21 20:44:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:55,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:56,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:56,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844303099] [2024-06-21 20:44:56,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844303099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:56,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:56,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:44:56,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929861405] [2024-06-21 20:44:56,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:56,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:44:56,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:56,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:44:56,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:44:56,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:44:56,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 267 transitions, 3251 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:56,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:56,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:44:56,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:57,147 INFO L124 PetriNetUnfolderBase]: 3134/5026 cut-off events. [2024-06-21 20:44:57,147 INFO L125 PetriNetUnfolderBase]: For 352356/352362 co-relation queries the response was YES. [2024-06-21 20:44:57,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39926 conditions, 5026 events. 3134/5026 cut-off events. For 352356/352362 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29942 event pairs, 719 based on Foata normal form. 6/5025 useless extension candidates. Maximal degree in co-relation 39819. Up to 4737 conditions per place. [2024-06-21 20:44:57,206 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 241 selfloop transitions, 53 changer transitions 0/298 dead transitions. [2024-06-21 20:44:57,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 298 transitions, 4363 flow [2024-06-21 20:44:57,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:44:57,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:44:57,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 20:44:57,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-21 20:44:57,207 INFO L175 Difference]: Start difference. First operand has 234 places, 267 transitions, 3251 flow. Second operand 7 states and 129 transitions. [2024-06-21 20:44:57,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 298 transitions, 4363 flow [2024-06-21 20:44:57,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 298 transitions, 4199 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 20:44:57,665 INFO L231 Difference]: Finished difference. Result has 234 places, 276 transitions, 3406 flow [2024-06-21 20:44:57,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3089, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3406, PETRI_PLACES=234, PETRI_TRANSITIONS=276} [2024-06-21 20:44:57,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-21 20:44:57,666 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 276 transitions, 3406 flow [2024-06-21 20:44:57,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:57,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:57,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:57,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:44:57,666 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:57,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:57,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1469681237, now seen corresponding path program 4 times [2024-06-21 20:44:57,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:57,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272923026] [2024-06-21 20:44:57,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:57,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:58,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:58,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272923026] [2024-06-21 20:44:58,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272923026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:58,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:58,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:44:58,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453272969] [2024-06-21 20:44:58,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:58,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:44:58,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:58,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:44:58,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:44:58,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:44:58,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 276 transitions, 3406 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:58,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:58,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:44:58,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:59,285 INFO L124 PetriNetUnfolderBase]: 3160/5064 cut-off events. [2024-06-21 20:44:59,285 INFO L125 PetriNetUnfolderBase]: For 367048/367054 co-relation queries the response was YES. [2024-06-21 20:44:59,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40620 conditions, 5064 events. 3160/5064 cut-off events. For 367048/367054 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 30185 event pairs, 726 based on Foata normal form. 6/5063 useless extension candidates. Maximal degree in co-relation 40512. Up to 4762 conditions per place. [2024-06-21 20:44:59,343 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 235 selfloop transitions, 62 changer transitions 0/301 dead transitions. [2024-06-21 20:44:59,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 301 transitions, 4464 flow [2024-06-21 20:44:59,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:44:59,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:44:59,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 20:44:59,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:44:59,345 INFO L175 Difference]: Start difference. First operand has 234 places, 276 transitions, 3406 flow. Second operand 7 states and 126 transitions. [2024-06-21 20:44:59,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 301 transitions, 4464 flow [2024-06-21 20:44:59,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 301 transitions, 4280 flow, removed 82 selfloop flow, removed 2 redundant places. [2024-06-21 20:44:59,902 INFO L231 Difference]: Finished difference. Result has 239 places, 282 transitions, 3496 flow [2024-06-21 20:44:59,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3276, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3496, PETRI_PLACES=239, PETRI_TRANSITIONS=282} [2024-06-21 20:44:59,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-21 20:44:59,902 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 282 transitions, 3496 flow [2024-06-21 20:44:59,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:59,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:59,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:59,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:44:59,903 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:59,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:59,903 INFO L85 PathProgramCache]: Analyzing trace with hash -941559753, now seen corresponding path program 5 times [2024-06-21 20:44:59,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:59,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561475478] [2024-06-21 20:44:59,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:59,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:00,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:00,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561475478] [2024-06-21 20:45:00,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561475478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:00,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:00,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:45:00,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757977974] [2024-06-21 20:45:00,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:00,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:45:00,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:00,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:45:00,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:45:00,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:45:00,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 282 transitions, 3496 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:00,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:00,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:45:00,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:01,542 INFO L124 PetriNetUnfolderBase]: 3154/5065 cut-off events. [2024-06-21 20:45:01,542 INFO L125 PetriNetUnfolderBase]: For 371282/371288 co-relation queries the response was YES. [2024-06-21 20:45:01,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40456 conditions, 5065 events. 3154/5065 cut-off events. For 371282/371288 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 30272 event pairs, 725 based on Foata normal form. 6/5064 useless extension candidates. Maximal degree in co-relation 40346. Up to 4856 conditions per place. [2024-06-21 20:45:01,598 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 253 selfloop transitions, 37 changer transitions 0/294 dead transitions. [2024-06-21 20:45:01,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 294 transitions, 4248 flow [2024-06-21 20:45:01,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:45:01,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:45:01,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 20:45:01,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 20:45:01,599 INFO L175 Difference]: Start difference. First operand has 239 places, 282 transitions, 3496 flow. Second operand 7 states and 119 transitions. [2024-06-21 20:45:01,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 294 transitions, 4248 flow [2024-06-21 20:45:02,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 294 transitions, 4144 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 20:45:02,150 INFO L231 Difference]: Finished difference. Result has 243 places, 282 transitions, 3472 flow [2024-06-21 20:45:02,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3472, PETRI_PLACES=243, PETRI_TRANSITIONS=282} [2024-06-21 20:45:02,152 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-21 20:45:02,152 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 282 transitions, 3472 flow [2024-06-21 20:45:02,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:02,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:02,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:02,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:45:02,153 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:02,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:02,153 INFO L85 PathProgramCache]: Analyzing trace with hash 586801349, now seen corresponding path program 6 times [2024-06-21 20:45:02,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:02,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116565309] [2024-06-21 20:45:02,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:02,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:02,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:02,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116565309] [2024-06-21 20:45:02,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116565309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:02,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:02,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:02,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962595664] [2024-06-21 20:45:02,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:02,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:02,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:02,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:02,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:02,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:45:02,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 282 transitions, 3472 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:02,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:02,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:45:02,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:03,803 INFO L124 PetriNetUnfolderBase]: 3148/5055 cut-off events. [2024-06-21 20:45:03,803 INFO L125 PetriNetUnfolderBase]: For 378299/378305 co-relation queries the response was YES. [2024-06-21 20:45:03,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40341 conditions, 5055 events. 3148/5055 cut-off events. For 378299/378305 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 30176 event pairs, 724 based on Foata normal form. 6/5054 useless extension candidates. Maximal degree in co-relation 40230. Up to 4875 conditions per place. [2024-06-21 20:45:03,854 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 260 selfloop transitions, 28 changer transitions 0/292 dead transitions. [2024-06-21 20:45:03,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 292 transitions, 4086 flow [2024-06-21 20:45:03,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:03,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:03,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 20:45:03,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-21 20:45:03,855 INFO L175 Difference]: Start difference. First operand has 243 places, 282 transitions, 3472 flow. Second operand 8 states and 127 transitions. [2024-06-21 20:45:03,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 292 transitions, 4086 flow [2024-06-21 20:45:04,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 292 transitions, 3969 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:45:04,319 INFO L231 Difference]: Finished difference. Result has 246 places, 282 transitions, 3417 flow [2024-06-21 20:45:04,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3355, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3417, PETRI_PLACES=246, PETRI_TRANSITIONS=282} [2024-06-21 20:45:04,320 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-21 20:45:04,320 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 282 transitions, 3417 flow [2024-06-21 20:45:04,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:04,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:04,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:04,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:45:04,321 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:04,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:04,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1787888423, now seen corresponding path program 2 times [2024-06-21 20:45:04,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:04,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901344374] [2024-06-21 20:45:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:04,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:05,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:05,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901344374] [2024-06-21 20:45:05,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901344374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:05,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:05,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:05,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544792409] [2024-06-21 20:45:05,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:05,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:05,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:05,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:05,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:05,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:45:05,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 282 transitions, 3417 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:45:05,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:05,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:45:05,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:06,245 INFO L124 PetriNetUnfolderBase]: 3168/5079 cut-off events. [2024-06-21 20:45:06,246 INFO L125 PetriNetUnfolderBase]: For 392556/392556 co-relation queries the response was YES. [2024-06-21 20:45:06,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40613 conditions, 5079 events. 3168/5079 cut-off events. For 392556/392556 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 30305 event pairs, 787 based on Foata normal form. 4/5080 useless extension candidates. Maximal degree in co-relation 40502. Up to 4913 conditions per place. [2024-06-21 20:45:06,292 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 273 selfloop transitions, 20 changer transitions 0/297 dead transitions. [2024-06-21 20:45:06,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 297 transitions, 4101 flow [2024-06-21 20:45:06,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:06,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:06,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 20:45:06,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-21 20:45:06,293 INFO L175 Difference]: Start difference. First operand has 246 places, 282 transitions, 3417 flow. Second operand 8 states and 129 transitions. [2024-06-21 20:45:06,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 297 transitions, 4101 flow [2024-06-21 20:45:06,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 297 transitions, 4035 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:06,758 INFO L231 Difference]: Finished difference. Result has 248 places, 285 transitions, 3458 flow [2024-06-21 20:45:06,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3351, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3458, PETRI_PLACES=248, PETRI_TRANSITIONS=285} [2024-06-21 20:45:06,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-21 20:45:06,759 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 285 transitions, 3458 flow [2024-06-21 20:45:06,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:45:06,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:06,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:06,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:45:06,760 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:06,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:06,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1634882219, now seen corresponding path program 3 times [2024-06-21 20:45:06,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:06,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513703706] [2024-06-21 20:45:06,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:06,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:07,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:07,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513703706] [2024-06-21 20:45:07,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513703706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:07,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:07,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:07,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005824579] [2024-06-21 20:45:07,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:07,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:07,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:07,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:07,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:07,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:45:07,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 285 transitions, 3458 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:45:07,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:07,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:45:07,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:08,580 INFO L124 PetriNetUnfolderBase]: 3188/5105 cut-off events. [2024-06-21 20:45:08,580 INFO L125 PetriNetUnfolderBase]: For 404881/404881 co-relation queries the response was YES. [2024-06-21 20:45:08,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41027 conditions, 5105 events. 3188/5105 cut-off events. For 404881/404881 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 30412 event pairs, 736 based on Foata normal form. 4/5100 useless extension candidates. Maximal degree in co-relation 40915. Up to 4794 conditions per place. [2024-06-21 20:45:08,638 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 250 selfloop transitions, 52 changer transitions 0/306 dead transitions. [2024-06-21 20:45:08,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 306 transitions, 4346 flow [2024-06-21 20:45:08,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:08,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:08,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 20:45:08,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 20:45:08,639 INFO L175 Difference]: Start difference. First operand has 248 places, 285 transitions, 3458 flow. Second operand 8 states and 141 transitions. [2024-06-21 20:45:08,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 306 transitions, 4346 flow [2024-06-21 20:45:09,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 306 transitions, 4223 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-21 20:45:09,198 INFO L231 Difference]: Finished difference. Result has 247 places, 288 transitions, 3505 flow [2024-06-21 20:45:09,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3335, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3505, PETRI_PLACES=247, PETRI_TRANSITIONS=288} [2024-06-21 20:45:09,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-21 20:45:09,199 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 288 transitions, 3505 flow [2024-06-21 20:45:09,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:45:09,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:09,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:09,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:45:09,200 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:09,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:09,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1787901443, now seen corresponding path program 4 times [2024-06-21 20:45:09,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:09,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130700361] [2024-06-21 20:45:09,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:09,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:09,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:09,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130700361] [2024-06-21 20:45:09,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130700361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:09,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:09,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:09,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014338186] [2024-06-21 20:45:09,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:09,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:09,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:09,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:09,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:10,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:45:10,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 288 transitions, 3505 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:45:10,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:10,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:45:10,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:11,174 INFO L124 PetriNetUnfolderBase]: 3176/5089 cut-off events. [2024-06-21 20:45:11,174 INFO L125 PetriNetUnfolderBase]: For 407937/407937 co-relation queries the response was YES. [2024-06-21 20:45:11,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40826 conditions, 5089 events. 3176/5089 cut-off events. For 407937/407937 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 30352 event pairs, 734 based on Foata normal form. 4/5084 useless extension candidates. Maximal degree in co-relation 40715. Up to 4786 conditions per place. [2024-06-21 20:45:11,230 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 55 changer transitions 0/304 dead transitions. [2024-06-21 20:45:11,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 304 transitions, 4189 flow [2024-06-21 20:45:11,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:11,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:11,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 20:45:11,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 20:45:11,234 INFO L175 Difference]: Start difference. First operand has 247 places, 288 transitions, 3505 flow. Second operand 8 states and 139 transitions. [2024-06-21 20:45:11,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 304 transitions, 4189 flow [2024-06-21 20:45:11,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 304 transitions, 4005 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:11,792 INFO L231 Difference]: Finished difference. Result has 249 places, 288 transitions, 3437 flow [2024-06-21 20:45:11,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3321, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3437, PETRI_PLACES=249, PETRI_TRANSITIONS=288} [2024-06-21 20:45:11,793 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-21 20:45:11,793 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 288 transitions, 3437 flow [2024-06-21 20:45:11,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:45:11,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:11,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:11,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:45:11,794 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:11,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:11,794 INFO L85 PathProgramCache]: Analyzing trace with hash -730306667, now seen corresponding path program 6 times [2024-06-21 20:45:11,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:11,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59668236] [2024-06-21 20:45:11,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:11,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:12,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:12,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:12,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59668236] [2024-06-21 20:45:12,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59668236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:12,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:12,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:45:12,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305381846] [2024-06-21 20:45:12,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:12,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:45:12,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:12,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:45:12,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:45:13,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:45:13,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 288 transitions, 3437 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:13,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:13,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:45:13,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:14,075 INFO L124 PetriNetUnfolderBase]: 3299/5343 cut-off events. [2024-06-21 20:45:14,075 INFO L125 PetriNetUnfolderBase]: For 431682/431684 co-relation queries the response was YES. [2024-06-21 20:45:14,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42281 conditions, 5343 events. 3299/5343 cut-off events. For 431682/431684 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 32695 event pairs, 698 based on Foata normal form. 14/5354 useless extension candidates. Maximal degree in co-relation 42169. Up to 4796 conditions per place. [2024-06-21 20:45:14,137 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 287 selfloop transitions, 52 changer transitions 0/363 dead transitions. [2024-06-21 20:45:14,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 363 transitions, 4613 flow [2024-06-21 20:45:14,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:45:14,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:45:14,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-21 20:45:14,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458980044345898 [2024-06-21 20:45:14,139 INFO L175 Difference]: Start difference. First operand has 249 places, 288 transitions, 3437 flow. Second operand 11 states and 207 transitions. [2024-06-21 20:45:14,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 363 transitions, 4613 flow [2024-06-21 20:45:14,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 363 transitions, 4462 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 20:45:14,773 INFO L231 Difference]: Finished difference. Result has 257 places, 319 transitions, 3857 flow [2024-06-21 20:45:14,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3298, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3857, PETRI_PLACES=257, PETRI_TRANSITIONS=319} [2024-06-21 20:45:14,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-21 20:45:14,789 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 319 transitions, 3857 flow [2024-06-21 20:45:14,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:14,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:14,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:14,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:45:14,790 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:14,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:14,790 INFO L85 PathProgramCache]: Analyzing trace with hash 915390723, now seen corresponding path program 7 times [2024-06-21 20:45:14,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:14,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623835164] [2024-06-21 20:45:14,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:14,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:16,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:16,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623835164] [2024-06-21 20:45:16,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623835164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:16,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:16,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:45:16,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717942204] [2024-06-21 20:45:16,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:16,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:45:16,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:16,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:45:16,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:45:16,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:45:16,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 319 transitions, 3857 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:16,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:16,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:45:16,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:17,464 INFO L124 PetriNetUnfolderBase]: 3447/5575 cut-off events. [2024-06-21 20:45:17,464 INFO L125 PetriNetUnfolderBase]: For 437007/437009 co-relation queries the response was YES. [2024-06-21 20:45:17,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44043 conditions, 5575 events. 3447/5575 cut-off events. For 437007/437009 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 34285 event pairs, 692 based on Foata normal form. 14/5586 useless extension candidates. Maximal degree in co-relation 43926. Up to 4934 conditions per place. [2024-06-21 20:45:17,529 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 300 selfloop transitions, 73 changer transitions 0/397 dead transitions. [2024-06-21 20:45:17,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 397 transitions, 5189 flow [2024-06-21 20:45:17,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:45:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:45:17,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-21 20:45:17,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567627494456763 [2024-06-21 20:45:17,533 INFO L175 Difference]: Start difference. First operand has 257 places, 319 transitions, 3857 flow. Second operand 11 states and 206 transitions. [2024-06-21 20:45:17,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 397 transitions, 5189 flow [2024-06-21 20:45:18,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 397 transitions, 5013 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-21 20:45:18,177 INFO L231 Difference]: Finished difference. Result has 267 places, 355 transitions, 4413 flow [2024-06-21 20:45:18,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3675, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4413, PETRI_PLACES=267, PETRI_TRANSITIONS=355} [2024-06-21 20:45:18,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-21 20:45:18,178 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 355 transitions, 4413 flow [2024-06-21 20:45:18,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:18,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:18,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:18,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:45:18,179 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:18,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:18,179 INFO L85 PathProgramCache]: Analyzing trace with hash 93638805, now seen corresponding path program 7 times [2024-06-21 20:45:18,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:18,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120703326] [2024-06-21 20:45:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:18,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:18,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:18,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120703326] [2024-06-21 20:45:18,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120703326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:18,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:18,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:18,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627553841] [2024-06-21 20:45:18,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:18,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:18,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:18,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:18,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:18,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:45:18,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 355 transitions, 4413 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:18,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:18,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:45:18,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:19,947 INFO L124 PetriNetUnfolderBase]: 3565/5713 cut-off events. [2024-06-21 20:45:19,947 INFO L125 PetriNetUnfolderBase]: For 424773/424775 co-relation queries the response was YES. [2024-06-21 20:45:19,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45158 conditions, 5713 events. 3565/5713 cut-off events. For 424773/424775 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 34772 event pairs, 877 based on Foata normal form. 4/5714 useless extension candidates. Maximal degree in co-relation 45035. Up to 5462 conditions per place. [2024-06-21 20:45:20,008 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 340 selfloop transitions, 49 changer transitions 0/393 dead transitions. [2024-06-21 20:45:20,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 393 transitions, 5583 flow [2024-06-21 20:45:20,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:20,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:20,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 20:45:20,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 20:45:20,010 INFO L175 Difference]: Start difference. First operand has 267 places, 355 transitions, 4413 flow. Second operand 8 states and 145 transitions. [2024-06-21 20:45:20,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 393 transitions, 5583 flow [2024-06-21 20:45:20,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 393 transitions, 5309 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:20,715 INFO L231 Difference]: Finished difference. Result has 270 places, 368 transitions, 4443 flow [2024-06-21 20:45:20,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4142, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4443, PETRI_PLACES=270, PETRI_TRANSITIONS=368} [2024-06-21 20:45:20,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-21 20:45:20,716 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 368 transitions, 4443 flow [2024-06-21 20:45:20,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:20,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:20,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:20,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:45:20,716 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:20,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:20,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1387217655, now seen corresponding path program 8 times [2024-06-21 20:45:20,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:20,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280611323] [2024-06-21 20:45:20,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:20,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:21,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:21,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280611323] [2024-06-21 20:45:21,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280611323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:21,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:21,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:21,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47924260] [2024-06-21 20:45:21,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:21,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:21,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:21,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:21,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:21,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:45:21,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 368 transitions, 4443 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:21,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:21,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:45:21,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:22,380 INFO L124 PetriNetUnfolderBase]: 3559/5707 cut-off events. [2024-06-21 20:45:22,380 INFO L125 PetriNetUnfolderBase]: For 425914/425916 co-relation queries the response was YES. [2024-06-21 20:45:22,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44348 conditions, 5707 events. 3559/5707 cut-off events. For 425914/425916 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 34798 event pairs, 878 based on Foata normal form. 4/5708 useless extension candidates. Maximal degree in co-relation 44225. Up to 5501 conditions per place. [2024-06-21 20:45:22,447 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 346 selfloop transitions, 37 changer transitions 0/387 dead transitions. [2024-06-21 20:45:22,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 387 transitions, 5281 flow [2024-06-21 20:45:22,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:22,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:22,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 20:45:22,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-21 20:45:22,448 INFO L175 Difference]: Start difference. First operand has 270 places, 368 transitions, 4443 flow. Second operand 8 states and 138 transitions. [2024-06-21 20:45:22,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 387 transitions, 5281 flow [2024-06-21 20:45:23,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 387 transitions, 5117 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:23,302 INFO L231 Difference]: Finished difference. Result has 272 places, 368 transitions, 4363 flow [2024-06-21 20:45:23,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4279, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4363, PETRI_PLACES=272, PETRI_TRANSITIONS=368} [2024-06-21 20:45:23,303 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-21 20:45:23,303 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 368 transitions, 4363 flow [2024-06-21 20:45:23,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:23,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:23,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:23,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:45:23,304 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:23,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:23,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1465879893, now seen corresponding path program 1 times [2024-06-21 20:45:23,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:23,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506525030] [2024-06-21 20:45:23,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:23,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:24,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:24,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506525030] [2024-06-21 20:45:24,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506525030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:24,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:24,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:24,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222015389] [2024-06-21 20:45:24,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:24,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:24,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:24,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:24,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:24,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:45:24,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 368 transitions, 4363 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:24,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:24,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:45:24,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:25,197 INFO L124 PetriNetUnfolderBase]: 3403/5537 cut-off events. [2024-06-21 20:45:25,198 INFO L125 PetriNetUnfolderBase]: For 375688/375688 co-relation queries the response was YES. [2024-06-21 20:45:25,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41744 conditions, 5537 events. 3403/5537 cut-off events. For 375688/375688 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 34507 event pairs, 921 based on Foata normal form. 1/5520 useless extension candidates. Maximal degree in co-relation 41621. Up to 5274 conditions per place. [2024-06-21 20:45:25,268 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 362 selfloop transitions, 24 changer transitions 0/395 dead transitions. [2024-06-21 20:45:25,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 395 transitions, 5445 flow [2024-06-21 20:45:25,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:45:25,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:45:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 20:45:25,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-21 20:45:25,269 INFO L175 Difference]: Start difference. First operand has 272 places, 368 transitions, 4363 flow. Second operand 9 states and 157 transitions. [2024-06-21 20:45:25,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 395 transitions, 5445 flow [2024-06-21 20:45:25,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 395 transitions, 5334 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 20:45:25,942 INFO L231 Difference]: Finished difference. Result has 273 places, 374 transitions, 4420 flow [2024-06-21 20:45:25,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4252, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4420, PETRI_PLACES=273, PETRI_TRANSITIONS=374} [2024-06-21 20:45:25,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-21 20:45:25,943 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 374 transitions, 4420 flow [2024-06-21 20:45:25,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:25,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:25,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:25,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:45:25,943 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:25,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:25,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1465970258, now seen corresponding path program 1 times [2024-06-21 20:45:25,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:25,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460901880] [2024-06-21 20:45:25,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:25,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:26,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:26,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460901880] [2024-06-21 20:45:26,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460901880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:26,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:26,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:26,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053628334] [2024-06-21 20:45:26,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:26,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:26,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:26,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:26,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:26,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:45:26,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 374 transitions, 4420 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:26,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:26,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:45:26,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:27,848 INFO L124 PetriNetUnfolderBase]: 3413/5549 cut-off events. [2024-06-21 20:45:27,848 INFO L125 PetriNetUnfolderBase]: For 389693/389693 co-relation queries the response was YES. [2024-06-21 20:45:27,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42393 conditions, 5549 events. 3413/5549 cut-off events. For 389693/389693 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 34570 event pairs, 920 based on Foata normal form. 2/5537 useless extension candidates. Maximal degree in co-relation 42269. Up to 5298 conditions per place. [2024-06-21 20:45:27,915 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 366 selfloop transitions, 19 changer transitions 0/394 dead transitions. [2024-06-21 20:45:27,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 394 transitions, 5300 flow [2024-06-21 20:45:27,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:45:27,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:45:27,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 20:45:27,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-21 20:45:27,916 INFO L175 Difference]: Start difference. First operand has 273 places, 374 transitions, 4420 flow. Second operand 9 states and 150 transitions. [2024-06-21 20:45:27,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 394 transitions, 5300 flow [2024-06-21 20:45:28,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 394 transitions, 5217 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 20:45:28,491 INFO L231 Difference]: Finished difference. Result has 277 places, 377 transitions, 4441 flow [2024-06-21 20:45:28,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4337, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4441, PETRI_PLACES=277, PETRI_TRANSITIONS=377} [2024-06-21 20:45:28,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-21 20:45:28,491 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 377 transitions, 4441 flow [2024-06-21 20:45:28,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:28,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:28,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:28,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:45:28,492 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:28,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:28,492 INFO L85 PathProgramCache]: Analyzing trace with hash -460492837, now seen corresponding path program 2 times [2024-06-21 20:45:28,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:28,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893831126] [2024-06-21 20:45:28,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:28,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:29,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:29,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893831126] [2024-06-21 20:45:29,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893831126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:29,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:29,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:29,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528322456] [2024-06-21 20:45:29,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:29,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:29,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:29,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:29,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:29,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:45:29,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 377 transitions, 4441 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:29,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:29,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:45:29,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:30,605 INFO L124 PetriNetUnfolderBase]: 3410/5545 cut-off events. [2024-06-21 20:45:30,605 INFO L125 PetriNetUnfolderBase]: For 393730/393730 co-relation queries the response was YES. [2024-06-21 20:45:30,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42646 conditions, 5545 events. 3410/5545 cut-off events. For 393730/393730 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 34565 event pairs, 920 based on Foata normal form. 1/5532 useless extension candidates. Maximal degree in co-relation 42520. Up to 5297 conditions per place. [2024-06-21 20:45:30,670 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 366 selfloop transitions, 18 changer transitions 0/393 dead transitions. [2024-06-21 20:45:30,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 393 transitions, 5261 flow [2024-06-21 20:45:30,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:30,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:30,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 20:45:30,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-21 20:45:30,671 INFO L175 Difference]: Start difference. First operand has 277 places, 377 transitions, 4441 flow. Second operand 8 states and 138 transitions. [2024-06-21 20:45:30,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 393 transitions, 5261 flow [2024-06-21 20:45:31,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 393 transitions, 5153 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 20:45:31,372 INFO L231 Difference]: Finished difference. Result has 278 places, 377 transitions, 4375 flow [2024-06-21 20:45:31,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4333, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4375, PETRI_PLACES=278, PETRI_TRANSITIONS=377} [2024-06-21 20:45:31,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-21 20:45:31,373 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 377 transitions, 4375 flow [2024-06-21 20:45:31,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:31,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:31,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:31,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 20:45:31,374 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:31,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:31,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1469694908, now seen corresponding path program 2 times [2024-06-21 20:45:31,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:31,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203077426] [2024-06-21 20:45:31,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:31,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:32,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:32,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203077426] [2024-06-21 20:45:32,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203077426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:32,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:32,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:32,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60192621] [2024-06-21 20:45:32,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:32,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:32,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:32,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:32,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:32,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:45:32,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 377 transitions, 4375 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:32,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:32,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:45:32,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:33,207 INFO L124 PetriNetUnfolderBase]: 3444/5594 cut-off events. [2024-06-21 20:45:33,208 INFO L125 PetriNetUnfolderBase]: For 413898/413898 co-relation queries the response was YES. [2024-06-21 20:45:33,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43315 conditions, 5594 events. 3444/5594 cut-off events. For 413898/413898 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 34852 event pairs, 924 based on Foata normal form. 2/5582 useless extension candidates. Maximal degree in co-relation 43188. Up to 5269 conditions per place. [2024-06-21 20:45:33,272 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 347 selfloop transitions, 48 changer transitions 0/404 dead transitions. [2024-06-21 20:45:33,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 404 transitions, 5681 flow [2024-06-21 20:45:33,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:45:33,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:45:33,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 20:45:33,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-21 20:45:33,273 INFO L175 Difference]: Start difference. First operand has 278 places, 377 transitions, 4375 flow. Second operand 9 states and 158 transitions. [2024-06-21 20:45:33,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 404 transitions, 5681 flow [2024-06-21 20:45:33,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 404 transitions, 5635 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 20:45:33,991 INFO L231 Difference]: Finished difference. Result has 280 places, 386 transitions, 4617 flow [2024-06-21 20:45:33,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4329, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4617, PETRI_PLACES=280, PETRI_TRANSITIONS=386} [2024-06-21 20:45:33,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-21 20:45:33,992 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 386 transitions, 4617 flow [2024-06-21 20:45:33,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:33,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:33,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:33,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 20:45:33,992 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:33,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:33,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1469689173, now seen corresponding path program 3 times [2024-06-21 20:45:33,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:33,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850763537] [2024-06-21 20:45:33,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:33,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:34,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:34,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850763537] [2024-06-21 20:45:34,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850763537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:34,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:34,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:34,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978410917] [2024-06-21 20:45:34,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:34,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:34,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:34,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:34,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:34,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:45:34,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 386 transitions, 4617 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:34,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:34,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:45:34,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:35,915 INFO L124 PetriNetUnfolderBase]: 3449/5599 cut-off events. [2024-06-21 20:45:35,915 INFO L125 PetriNetUnfolderBase]: For 423176/423176 co-relation queries the response was YES. [2024-06-21 20:45:35,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43836 conditions, 5599 events. 3449/5599 cut-off events. For 423176/423176 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 34838 event pairs, 927 based on Foata normal form. 1/5584 useless extension candidates. Maximal degree in co-relation 43708. Up to 5336 conditions per place. [2024-06-21 20:45:36,093 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 362 selfloop transitions, 31 changer transitions 0/402 dead transitions. [2024-06-21 20:45:36,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 402 transitions, 5507 flow [2024-06-21 20:45:36,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:45:36,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:45:36,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 20:45:36,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-21 20:45:36,095 INFO L175 Difference]: Start difference. First operand has 280 places, 386 transitions, 4617 flow. Second operand 9 states and 150 transitions. [2024-06-21 20:45:36,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 402 transitions, 5507 flow [2024-06-21 20:45:36,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 402 transitions, 5416 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-21 20:45:36,764 INFO L231 Difference]: Finished difference. Result has 285 places, 389 transitions, 4664 flow [2024-06-21 20:45:36,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4526, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4664, PETRI_PLACES=285, PETRI_TRANSITIONS=389} [2024-06-21 20:45:36,764 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-21 20:45:36,765 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 389 transitions, 4664 flow [2024-06-21 20:45:36,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:36,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:36,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:36,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 20:45:36,765 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:36,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:36,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1469689328, now seen corresponding path program 3 times [2024-06-21 20:45:36,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:36,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367262280] [2024-06-21 20:45:36,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:36,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:37,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:37,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367262280] [2024-06-21 20:45:37,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367262280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:37,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:37,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:37,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768207027] [2024-06-21 20:45:37,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:37,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:37,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:37,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:37,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:37,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:45:37,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 389 transitions, 4664 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:37,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:37,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:45:37,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:38,608 INFO L124 PetriNetUnfolderBase]: 3443/5593 cut-off events. [2024-06-21 20:45:38,608 INFO L125 PetriNetUnfolderBase]: For 431310/431310 co-relation queries the response was YES. [2024-06-21 20:45:38,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44133 conditions, 5593 events. 3443/5593 cut-off events. For 431310/431310 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 34837 event pairs, 923 based on Foata normal form. 2/5581 useless extension candidates. Maximal degree in co-relation 44003. Up to 5271 conditions per place. [2024-06-21 20:45:38,677 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 351 selfloop transitions, 47 changer transitions 0/407 dead transitions. [2024-06-21 20:45:38,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 407 transitions, 5662 flow [2024-06-21 20:45:38,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:45:38,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:45:38,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 20:45:38,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 20:45:38,678 INFO L175 Difference]: Start difference. First operand has 285 places, 389 transitions, 4664 flow. Second operand 9 states and 159 transitions. [2024-06-21 20:45:38,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 407 transitions, 5662 flow [2024-06-21 20:45:39,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 407 transitions, 5512 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-21 20:45:39,568 INFO L231 Difference]: Finished difference. Result has 287 places, 389 transitions, 4614 flow [2024-06-21 20:45:39,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4514, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4614, PETRI_PLACES=287, PETRI_TRANSITIONS=389} [2024-06-21 20:45:39,569 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-21 20:45:39,569 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 389 transitions, 4614 flow [2024-06-21 20:45:39,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:39,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:39,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:39,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 20:45:39,570 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:39,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:39,570 INFO L85 PathProgramCache]: Analyzing trace with hash -934194432, now seen corresponding path program 4 times [2024-06-21 20:45:39,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:39,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662515208] [2024-06-21 20:45:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:39,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:40,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:40,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662515208] [2024-06-21 20:45:40,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662515208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:40,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:40,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:40,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488809261] [2024-06-21 20:45:40,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:40,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:40,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:40,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:40,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:40,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:45:40,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 389 transitions, 4614 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:40,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:40,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:45:40,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:41,388 INFO L124 PetriNetUnfolderBase]: 3453/5609 cut-off events. [2024-06-21 20:45:41,388 INFO L125 PetriNetUnfolderBase]: For 441606/441606 co-relation queries the response was YES. [2024-06-21 20:45:41,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44373 conditions, 5609 events. 3453/5609 cut-off events. For 441606/441606 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 34984 event pairs, 921 based on Foata normal form. 2/5595 useless extension candidates. Maximal degree in co-relation 44242. Up to 5359 conditions per place. [2024-06-21 20:45:41,467 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 374 selfloop transitions, 21 changer transitions 0/404 dead transitions. [2024-06-21 20:45:41,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 404 transitions, 5510 flow [2024-06-21 20:45:41,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:45:41,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:45:41,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 20:45:41,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-21 20:45:41,468 INFO L175 Difference]: Start difference. First operand has 287 places, 389 transitions, 4614 flow. Second operand 9 states and 145 transitions. [2024-06-21 20:45:41,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 404 transitions, 5510 flow [2024-06-21 20:45:42,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 404 transitions, 5392 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 20:45:42,418 INFO L231 Difference]: Finished difference. Result has 288 places, 392 transitions, 4620 flow [2024-06-21 20:45:42,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4502, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4620, PETRI_PLACES=288, PETRI_TRANSITIONS=392} [2024-06-21 20:45:42,419 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-21 20:45:42,419 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 392 transitions, 4620 flow [2024-06-21 20:45:42,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:42,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:42,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:42,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 20:45:42,420 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:42,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:42,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1629168299, now seen corresponding path program 4 times [2024-06-21 20:45:42,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:42,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728082428] [2024-06-21 20:45:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:42,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:43,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:43,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728082428] [2024-06-21 20:45:43,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728082428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:43,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:43,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:43,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004979470] [2024-06-21 20:45:43,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:43,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:43,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:43,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:43,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:43,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:45:43,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 392 transitions, 4620 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:43,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:43,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:45:43,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:44,462 INFO L124 PetriNetUnfolderBase]: 3450/5605 cut-off events. [2024-06-21 20:45:44,463 INFO L125 PetriNetUnfolderBase]: For 445986/445986 co-relation queries the response was YES. [2024-06-21 20:45:44,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44311 conditions, 5605 events. 3450/5605 cut-off events. For 445986/445986 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 34933 event pairs, 923 based on Foata normal form. 1/5592 useless extension candidates. Maximal degree in co-relation 44179. Up to 5365 conditions per place. [2024-06-21 20:45:44,533 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 378 selfloop transitions, 18 changer transitions 0/405 dead transitions. [2024-06-21 20:45:44,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 405 transitions, 5510 flow [2024-06-21 20:45:44,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:44,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:44,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 20:45:44,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 20:45:44,534 INFO L175 Difference]: Start difference. First operand has 288 places, 392 transitions, 4620 flow. Second operand 8 states and 132 transitions. [2024-06-21 20:45:44,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 405 transitions, 5510 flow [2024-06-21 20:45:45,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 405 transitions, 5420 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 20:45:45,455 INFO L231 Difference]: Finished difference. Result has 289 places, 395 transitions, 4648 flow [2024-06-21 20:45:45,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4530, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4648, PETRI_PLACES=289, PETRI_TRANSITIONS=395} [2024-06-21 20:45:45,455 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-21 20:45:45,455 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 395 transitions, 4648 flow [2024-06-21 20:45:45,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:45,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:45,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:45,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 20:45:45,456 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:45,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:45,456 INFO L85 PathProgramCache]: Analyzing trace with hash -318234896, now seen corresponding path program 5 times [2024-06-21 20:45:45,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:45,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669525249] [2024-06-21 20:45:45,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:45,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:46,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:46,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669525249] [2024-06-21 20:45:46,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669525249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:46,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:46,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:46,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826452455] [2024-06-21 20:45:46,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:46,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:46,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:46,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:46,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:46,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:45:46,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 395 transitions, 4648 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:46,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:46,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:45:46,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:47,454 INFO L124 PetriNetUnfolderBase]: 3460/5617 cut-off events. [2024-06-21 20:45:47,454 INFO L125 PetriNetUnfolderBase]: For 457975/457975 co-relation queries the response was YES. [2024-06-21 20:45:47,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44901 conditions, 5617 events. 3460/5617 cut-off events. For 457975/457975 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 34924 event pairs, 922 based on Foata normal form. 2/5605 useless extension candidates. Maximal degree in co-relation 44768. Up to 5340 conditions per place. [2024-06-21 20:45:47,520 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 370 selfloop transitions, 33 changer transitions 0/412 dead transitions. [2024-06-21 20:45:47,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 412 transitions, 5716 flow [2024-06-21 20:45:47,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:47,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:47,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 20:45:47,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 20:45:47,521 INFO L175 Difference]: Start difference. First operand has 289 places, 395 transitions, 4648 flow. Second operand 8 states and 139 transitions. [2024-06-21 20:45:47,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 412 transitions, 5716 flow [2024-06-21 20:45:48,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 412 transitions, 5620 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:48,481 INFO L231 Difference]: Finished difference. Result has 291 places, 398 transitions, 4694 flow [2024-06-21 20:45:48,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4552, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4694, PETRI_PLACES=291, PETRI_TRANSITIONS=398} [2024-06-21 20:45:48,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-21 20:45:48,482 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 398 transitions, 4694 flow [2024-06-21 20:45:48,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:48,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:48,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:48,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 20:45:48,482 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:48,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:48,483 INFO L85 PathProgramCache]: Analyzing trace with hash -312877502, now seen corresponding path program 6 times [2024-06-21 20:45:48,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:48,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704733997] [2024-06-21 20:45:48,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:48,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:49,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:49,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704733997] [2024-06-21 20:45:49,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704733997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:49,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:49,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:49,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811055335] [2024-06-21 20:45:49,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:49,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:49,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:49,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:49,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:49,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:45:49,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 398 transitions, 4694 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:49,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:49,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:45:49,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:50,308 INFO L124 PetriNetUnfolderBase]: 3454/5609 cut-off events. [2024-06-21 20:45:50,309 INFO L125 PetriNetUnfolderBase]: For 462304/462304 co-relation queries the response was YES. [2024-06-21 20:45:50,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44809 conditions, 5609 events. 3454/5609 cut-off events. For 462304/462304 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 34893 event pairs, 924 based on Foata normal form. 2/5597 useless extension candidates. Maximal degree in co-relation 44675. Up to 5335 conditions per place. [2024-06-21 20:45:50,494 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 370 selfloop transitions, 32 changer transitions 0/411 dead transitions. [2024-06-21 20:45:50,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 411 transitions, 5538 flow [2024-06-21 20:45:50,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:50,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:50,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 20:45:50,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 20:45:50,495 INFO L175 Difference]: Start difference. First operand has 291 places, 398 transitions, 4694 flow. Second operand 8 states and 139 transitions. [2024-06-21 20:45:50,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 411 transitions, 5538 flow [2024-06-21 20:45:51,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 411 transitions, 5357 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:51,540 INFO L231 Difference]: Finished difference. Result has 293 places, 398 transitions, 4583 flow [2024-06-21 20:45:51,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4513, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4583, PETRI_PLACES=293, PETRI_TRANSITIONS=398} [2024-06-21 20:45:51,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-21 20:45:51,543 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 398 transitions, 4583 flow [2024-06-21 20:45:51,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:51,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:51,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:51,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 20:45:51,544 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:51,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:51,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1787440101, now seen corresponding path program 1 times [2024-06-21 20:45:51,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:51,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886952882] [2024-06-21 20:45:51,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:51,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:52,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:52,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886952882] [2024-06-21 20:45:52,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886952882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:52,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:52,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:45:52,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115877654] [2024-06-21 20:45:52,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:52,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:45:52,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:52,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:45:52,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:45:52,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:45:52,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 398 transitions, 4583 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:52,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:52,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:45:52,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:54,040 INFO L124 PetriNetUnfolderBase]: 3640/5816 cut-off events. [2024-06-21 20:45:54,040 INFO L125 PetriNetUnfolderBase]: For 545153/545153 co-relation queries the response was YES. [2024-06-21 20:45:54,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47758 conditions, 5816 events. 3640/5816 cut-off events. For 545153/545153 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 35296 event pairs, 993 based on Foata normal form. 2/5815 useless extension candidates. Maximal degree in co-relation 47623. Up to 5646 conditions per place. [2024-06-21 20:45:54,266 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 388 selfloop transitions, 19 changer transitions 0/411 dead transitions. [2024-06-21 20:45:54,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 411 transitions, 5477 flow [2024-06-21 20:45:54,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:54,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 20:45:54,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-21 20:45:54,267 INFO L175 Difference]: Start difference. First operand has 293 places, 398 transitions, 4583 flow. Second operand 8 states and 126 transitions. [2024-06-21 20:45:54,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 411 transitions, 5477 flow [2024-06-21 20:45:55,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 411 transitions, 5395 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 20:45:55,429 INFO L231 Difference]: Finished difference. Result has 294 places, 400 transitions, 4598 flow [2024-06-21 20:45:55,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4501, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4598, PETRI_PLACES=294, PETRI_TRANSITIONS=400} [2024-06-21 20:45:55,430 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-21 20:45:55,430 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 400 transitions, 4598 flow [2024-06-21 20:45:55,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:55,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:55,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:55,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 20:45:55,431 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:55,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:55,431 INFO L85 PathProgramCache]: Analyzing trace with hash -579072597, now seen corresponding path program 1 times [2024-06-21 20:45:55,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:55,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404685891] [2024-06-21 20:45:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:55,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:56,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:56,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404685891] [2024-06-21 20:45:56,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404685891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:56,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:56,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:56,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630202744] [2024-06-21 20:45:56,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:56,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:56,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:56,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:56,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:56,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:45:56,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 400 transitions, 4598 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:45:56,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:56,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:45:56,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:57,663 INFO L124 PetriNetUnfolderBase]: 3645/5832 cut-off events. [2024-06-21 20:45:57,663 INFO L125 PetriNetUnfolderBase]: For 553349/553351 co-relation queries the response was YES. [2024-06-21 20:45:57,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48047 conditions, 5832 events. 3645/5832 cut-off events. For 553349/553351 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 35501 event pairs, 859 based on Foata normal form. 3/5832 useless extension candidates. Maximal degree in co-relation 47911. Up to 5511 conditions per place. [2024-06-21 20:45:57,740 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 361 selfloop transitions, 65 changer transitions 0/430 dead transitions. [2024-06-21 20:45:57,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 430 transitions, 5844 flow [2024-06-21 20:45:57,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:45:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:45:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 20:45:57,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 20:45:57,741 INFO L175 Difference]: Start difference. First operand has 294 places, 400 transitions, 4598 flow. Second operand 8 states and 145 transitions. [2024-06-21 20:45:57,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 430 transitions, 5844 flow [2024-06-21 20:45:58,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 430 transitions, 5763 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 20:45:58,963 INFO L231 Difference]: Finished difference. Result has 296 places, 406 transitions, 4824 flow [2024-06-21 20:45:58,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4517, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4824, PETRI_PLACES=296, PETRI_TRANSITIONS=406} [2024-06-21 20:45:58,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-21 20:45:58,964 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 406 transitions, 4824 flow [2024-06-21 20:45:58,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:45:58,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:58,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:58,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 20:45:58,965 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:45:58,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:58,965 INFO L85 PathProgramCache]: Analyzing trace with hash -578922867, now seen corresponding path program 2 times [2024-06-21 20:45:58,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:58,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521308027] [2024-06-21 20:45:58,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:58,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:59,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:59,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521308027] [2024-06-21 20:45:59,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521308027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:59,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:59,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:45:59,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612506988] [2024-06-21 20:45:59,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:59,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:45:59,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:59,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:45:59,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:45:59,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:45:59,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 406 transitions, 4824 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:45:59,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:59,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:45:59,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:00,982 INFO L124 PetriNetUnfolderBase]: 3655/5844 cut-off events. [2024-06-21 20:46:00,982 INFO L125 PetriNetUnfolderBase]: For 569469/569471 co-relation queries the response was YES. [2024-06-21 20:46:01,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48792 conditions, 5844 events. 3655/5844 cut-off events. For 569469/569471 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 35562 event pairs, 873 based on Foata normal form. 3/5844 useless extension candidates. Maximal degree in co-relation 48655. Up to 5582 conditions per place. [2024-06-21 20:46:01,057 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 370 selfloop transitions, 58 changer transitions 0/432 dead transitions. [2024-06-21 20:46:01,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 432 transitions, 5861 flow [2024-06-21 20:46:01,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:01,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:01,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 20:46:01,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 20:46:01,060 INFO L175 Difference]: Start difference. First operand has 296 places, 406 transitions, 4824 flow. Second operand 8 states and 140 transitions. [2024-06-21 20:46:01,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 432 transitions, 5861 flow [2024-06-21 20:46:02,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 432 transitions, 5650 flow, removed 90 selfloop flow, removed 3 redundant places. [2024-06-21 20:46:02,283 INFO L231 Difference]: Finished difference. Result has 301 places, 412 transitions, 4858 flow [2024-06-21 20:46:02,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4663, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4858, PETRI_PLACES=301, PETRI_TRANSITIONS=412} [2024-06-21 20:46:02,284 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-21 20:46:02,284 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 412 transitions, 4858 flow [2024-06-21 20:46:02,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:46:02,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:02,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:02,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 20:46:02,284 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:02,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:02,285 INFO L85 PathProgramCache]: Analyzing trace with hash -463602681, now seen corresponding path program 1 times [2024-06-21 20:46:02,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:02,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763153413] [2024-06-21 20:46:02,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:02,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:02,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:02,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763153413] [2024-06-21 20:46:02,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763153413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:02,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:02,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:46:02,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236235342] [2024-06-21 20:46:02,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:02,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:46:02,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:02,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:46:02,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:46:03,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:46:03,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 412 transitions, 4858 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:46:03,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:03,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:46:03,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:04,280 INFO L124 PetriNetUnfolderBase]: 3665/5851 cut-off events. [2024-06-21 20:46:04,280 INFO L125 PetriNetUnfolderBase]: For 584412/584414 co-relation queries the response was YES. [2024-06-21 20:46:04,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49002 conditions, 5851 events. 3665/5851 cut-off events. For 584412/584414 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 35569 event pairs, 872 based on Foata normal form. 4/5852 useless extension candidates. Maximal degree in co-relation 48863. Up to 5584 conditions per place. [2024-06-21 20:46:04,361 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 398 selfloop transitions, 36 changer transitions 0/438 dead transitions. [2024-06-21 20:46:04,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 438 transitions, 5900 flow [2024-06-21 20:46:04,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:04,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:04,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 20:46:04,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 20:46:04,362 INFO L175 Difference]: Start difference. First operand has 301 places, 412 transitions, 4858 flow. Second operand 8 states and 140 transitions. [2024-06-21 20:46:04,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 438 transitions, 5900 flow [2024-06-21 20:46:05,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 438 transitions, 5762 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 20:46:05,649 INFO L231 Difference]: Finished difference. Result has 304 places, 415 transitions, 4889 flow [2024-06-21 20:46:05,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4724, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4889, PETRI_PLACES=304, PETRI_TRANSITIONS=415} [2024-06-21 20:46:05,650 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-21 20:46:05,650 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 415 transitions, 4889 flow [2024-06-21 20:46:05,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:46:05,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:05,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:05,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 20:46:05,650 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:05,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:05,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2056317083, now seen corresponding path program 2 times [2024-06-21 20:46:05,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:05,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017478880] [2024-06-21 20:46:05,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:05,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:06,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:06,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017478880] [2024-06-21 20:46:06,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017478880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:06,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:06,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:46:06,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030470495] [2024-06-21 20:46:06,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:06,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:46:06,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:06,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:46:06,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:46:06,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:46:06,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 415 transitions, 4889 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:06,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:06,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:46:06,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:07,825 INFO L124 PetriNetUnfolderBase]: 3691/5892 cut-off events. [2024-06-21 20:46:07,826 INFO L125 PetriNetUnfolderBase]: For 602834/602836 co-relation queries the response was YES. [2024-06-21 20:46:07,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49720 conditions, 5892 events. 3691/5892 cut-off events. For 602834/602836 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 35794 event pairs, 883 based on Foata normal form. 4/5893 useless extension candidates. Maximal degree in co-relation 49580. Up to 5518 conditions per place. [2024-06-21 20:46:07,890 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 372 selfloop transitions, 67 changer transitions 0/443 dead transitions. [2024-06-21 20:46:07,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 443 transitions, 6209 flow [2024-06-21 20:46:07,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:07,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 20:46:07,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-21 20:46:07,892 INFO L175 Difference]: Start difference. First operand has 304 places, 415 transitions, 4889 flow. Second operand 8 states and 143 transitions. [2024-06-21 20:46:07,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 443 transitions, 6209 flow [2024-06-21 20:46:09,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 443 transitions, 6074 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 20:46:09,090 INFO L231 Difference]: Finished difference. Result has 306 places, 421 transitions, 5074 flow [2024-06-21 20:46:09,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4754, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5074, PETRI_PLACES=306, PETRI_TRANSITIONS=421} [2024-06-21 20:46:09,091 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-21 20:46:09,091 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 421 transitions, 5074 flow [2024-06-21 20:46:09,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:09,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:09,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:09,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 20:46:09,092 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:09,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:09,092 INFO L85 PathProgramCache]: Analyzing trace with hash -463482525, now seen corresponding path program 1 times [2024-06-21 20:46:09,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:09,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192015097] [2024-06-21 20:46:09,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:09,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:09,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:09,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192015097] [2024-06-21 20:46:09,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192015097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:09,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:09,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:46:09,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701918341] [2024-06-21 20:46:09,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:09,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:46:09,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:09,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:46:09,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:46:09,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:46:09,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 421 transitions, 5074 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:46:09,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:09,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:46:09,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:11,012 INFO L124 PetriNetUnfolderBase]: 3722/5932 cut-off events. [2024-06-21 20:46:11,013 INFO L125 PetriNetUnfolderBase]: For 628346/628349 co-relation queries the response was YES. [2024-06-21 20:46:11,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50741 conditions, 5932 events. 3722/5932 cut-off events. For 628346/628349 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 36037 event pairs, 876 based on Foata normal form. 4/5931 useless extension candidates. Maximal degree in co-relation 50600. Up to 5625 conditions per place. [2024-06-21 20:46:11,093 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 392 selfloop transitions, 62 changer transitions 0/458 dead transitions. [2024-06-21 20:46:11,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 458 transitions, 6462 flow [2024-06-21 20:46:11,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:46:11,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:46:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 20:46:11,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-21 20:46:11,094 INFO L175 Difference]: Start difference. First operand has 306 places, 421 transitions, 5074 flow. Second operand 9 states and 154 transitions. [2024-06-21 20:46:11,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 458 transitions, 6462 flow [2024-06-21 20:46:12,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 458 transitions, 6315 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-21 20:46:12,381 INFO L231 Difference]: Finished difference. Result has 313 places, 437 transitions, 5328 flow [2024-06-21 20:46:12,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4927, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5328, PETRI_PLACES=313, PETRI_TRANSITIONS=437} [2024-06-21 20:46:12,381 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-21 20:46:12,381 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 437 transitions, 5328 flow [2024-06-21 20:46:12,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:46:12,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:12,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:12,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 20:46:12,382 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:12,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:12,382 INFO L85 PathProgramCache]: Analyzing trace with hash -286356027, now seen corresponding path program 3 times [2024-06-21 20:46:12,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:12,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555355230] [2024-06-21 20:46:12,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:12,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:13,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:13,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555355230] [2024-06-21 20:46:13,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555355230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:13,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:13,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:46:13,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805612972] [2024-06-21 20:46:13,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:13,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:46:13,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:13,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:46:13,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:46:13,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:46:13,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 437 transitions, 5328 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:46:13,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:13,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:46:13,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:14,535 INFO L124 PetriNetUnfolderBase]: 3727/5942 cut-off events. [2024-06-21 20:46:14,535 INFO L125 PetriNetUnfolderBase]: For 643492/643492 co-relation queries the response was YES. [2024-06-21 20:46:14,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51734 conditions, 5942 events. 3727/5942 cut-off events. For 643492/643492 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 36136 event pairs, 771 based on Foata normal form. 1/5940 useless extension candidates. Maximal degree in co-relation 51589. Up to 5682 conditions per place. [2024-06-21 20:46:14,624 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 395 selfloop transitions, 56 changer transitions 0/455 dead transitions. [2024-06-21 20:46:14,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 455 transitions, 6322 flow [2024-06-21 20:46:14,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:14,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:14,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 20:46:14,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 20:46:14,625 INFO L175 Difference]: Start difference. First operand has 313 places, 437 transitions, 5328 flow. Second operand 8 states and 135 transitions. [2024-06-21 20:46:14,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 455 transitions, 6322 flow [2024-06-21 20:46:16,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 455 transitions, 6204 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-21 20:46:16,134 INFO L231 Difference]: Finished difference. Result has 318 places, 440 transitions, 5380 flow [2024-06-21 20:46:16,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5210, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5380, PETRI_PLACES=318, PETRI_TRANSITIONS=440} [2024-06-21 20:46:16,135 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-21 20:46:16,135 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 440 transitions, 5380 flow [2024-06-21 20:46:16,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:46:16,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:16,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:16,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 20:46:16,135 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:16,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:16,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1397190681, now seen corresponding path program 2 times [2024-06-21 20:46:16,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:16,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815679670] [2024-06-21 20:46:16,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:16,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:16,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:16,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815679670] [2024-06-21 20:46:16,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815679670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:16,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:16,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:46:16,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822242024] [2024-06-21 20:46:16,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:16,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:46:16,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:16,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:46:16,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:46:16,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:46:16,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 440 transitions, 5380 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:16,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:16,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:46:16,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:18,285 INFO L124 PetriNetUnfolderBase]: 3747/5978 cut-off events. [2024-06-21 20:46:18,286 INFO L125 PetriNetUnfolderBase]: For 667642/667644 co-relation queries the response was YES. [2024-06-21 20:46:18,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52092 conditions, 5978 events. 3747/5978 cut-off events. For 667642/667644 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 36468 event pairs, 882 based on Foata normal form. 6/5981 useless extension candidates. Maximal degree in co-relation 51945. Up to 5747 conditions per place. [2024-06-21 20:46:18,377 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 411 selfloop transitions, 48 changer transitions 0/463 dead transitions. [2024-06-21 20:46:18,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 463 transitions, 6483 flow [2024-06-21 20:46:18,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:18,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 20:46:18,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 20:46:18,380 INFO L175 Difference]: Start difference. First operand has 318 places, 440 transitions, 5380 flow. Second operand 8 states and 136 transitions. [2024-06-21 20:46:18,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 463 transitions, 6483 flow [2024-06-21 20:46:20,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 463 transitions, 6300 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 20:46:20,350 INFO L231 Difference]: Finished difference. Result has 320 places, 447 transitions, 5438 flow [2024-06-21 20:46:20,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5201, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5438, PETRI_PLACES=320, PETRI_TRANSITIONS=447} [2024-06-21 20:46:20,351 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-21 20:46:20,351 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 447 transitions, 5438 flow [2024-06-21 20:46:20,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:20,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:20,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:20,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 20:46:20,352 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:20,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:20,352 INFO L85 PathProgramCache]: Analyzing trace with hash -179178859, now seen corresponding path program 3 times [2024-06-21 20:46:20,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:20,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336038564] [2024-06-21 20:46:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:20,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:21,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:21,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336038564] [2024-06-21 20:46:21,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336038564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:21,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:21,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:46:21,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560364935] [2024-06-21 20:46:21,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:21,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:46:21,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:21,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:46:21,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:46:21,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:46:21,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 447 transitions, 5438 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:46:21,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:21,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:46:21,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:22,439 INFO L124 PetriNetUnfolderBase]: 3767/6006 cut-off events. [2024-06-21 20:46:22,439 INFO L125 PetriNetUnfolderBase]: For 681977/681979 co-relation queries the response was YES. [2024-06-21 20:46:22,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52541 conditions, 6006 events. 3767/6006 cut-off events. For 681977/681979 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 36609 event pairs, 878 based on Foata normal form. 6/6009 useless extension candidates. Maximal degree in co-relation 52393. Up to 5737 conditions per place. [2024-06-21 20:46:22,513 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 406 selfloop transitions, 60 changer transitions 0/470 dead transitions. [2024-06-21 20:46:22,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 470 transitions, 6570 flow [2024-06-21 20:46:22,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:22,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:22,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 20:46:22,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 20:46:22,515 INFO L175 Difference]: Start difference. First operand has 320 places, 447 transitions, 5438 flow. Second operand 8 states and 139 transitions. [2024-06-21 20:46:22,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 470 transitions, 6570 flow [2024-06-21 20:46:24,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 470 transitions, 6418 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 20:46:24,542 INFO L231 Difference]: Finished difference. Result has 323 places, 453 transitions, 5551 flow [2024-06-21 20:46:24,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5286, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5551, PETRI_PLACES=323, PETRI_TRANSITIONS=453} [2024-06-21 20:46:24,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-21 20:46:24,543 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 453 transitions, 5551 flow [2024-06-21 20:46:24,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:46:24,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:24,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:24,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 20:46:24,543 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:24,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:24,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1488849861, now seen corresponding path program 3 times [2024-06-21 20:46:24,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:24,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100738506] [2024-06-21 20:46:24,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:24,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:25,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:25,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100738506] [2024-06-21 20:46:25,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100738506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:25,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:25,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:46:25,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828606483] [2024-06-21 20:46:25,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:25,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:46:25,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:25,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:46:25,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:46:25,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:46:25,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 453 transitions, 5551 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:25,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:25,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:46:25,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:26,591 INFO L124 PetriNetUnfolderBase]: 3777/6022 cut-off events. [2024-06-21 20:46:26,591 INFO L125 PetriNetUnfolderBase]: For 691412/691414 co-relation queries the response was YES. [2024-06-21 20:46:26,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53199 conditions, 6022 events. 3777/6022 cut-off events. For 691412/691414 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 36755 event pairs, 877 based on Foata normal form. 4/6023 useless extension candidates. Maximal degree in co-relation 53051. Up to 5784 conditions per place. [2024-06-21 20:46:26,677 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 427 selfloop transitions, 42 changer transitions 0/473 dead transitions. [2024-06-21 20:46:26,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 473 transitions, 6637 flow [2024-06-21 20:46:26,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:26,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 20:46:26,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 20:46:26,679 INFO L175 Difference]: Start difference. First operand has 323 places, 453 transitions, 5551 flow. Second operand 8 states and 135 transitions. [2024-06-21 20:46:26,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 473 transitions, 6637 flow [2024-06-21 20:46:28,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 473 transitions, 6440 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 20:46:28,826 INFO L231 Difference]: Finished difference. Result has 325 places, 456 transitions, 5522 flow [2024-06-21 20:46:28,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5354, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5522, PETRI_PLACES=325, PETRI_TRANSITIONS=456} [2024-06-21 20:46:28,826 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-21 20:46:28,827 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 456 transitions, 5522 flow [2024-06-21 20:46:28,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:28,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:28,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:28,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 20:46:28,827 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:28,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:28,828 INFO L85 PathProgramCache]: Analyzing trace with hash -581932533, now seen corresponding path program 1 times [2024-06-21 20:46:28,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:28,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854405652] [2024-06-21 20:46:28,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:28,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:29,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:29,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854405652] [2024-06-21 20:46:29,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854405652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:29,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:29,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:46:29,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570474115] [2024-06-21 20:46:29,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:29,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:46:29,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:29,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:46:29,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:46:29,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:46:29,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 456 transitions, 5522 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:46:29,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:29,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:46:29,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:31,005 INFO L124 PetriNetUnfolderBase]: 3785/6034 cut-off events. [2024-06-21 20:46:31,005 INFO L125 PetriNetUnfolderBase]: For 705474/705476 co-relation queries the response was YES. [2024-06-21 20:46:31,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53337 conditions, 6034 events. 3785/6034 cut-off events. For 705474/705476 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 36712 event pairs, 743 based on Foata normal form. 4/6035 useless extension candidates. Maximal degree in co-relation 53188. Up to 5695 conditions per place. [2024-06-21 20:46:31,093 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 427 selfloop transitions, 55 changer transitions 0/486 dead transitions. [2024-06-21 20:46:31,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 486 transitions, 6834 flow [2024-06-21 20:46:31,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:31,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:31,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 20:46:31,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 20:46:31,094 INFO L175 Difference]: Start difference. First operand has 325 places, 456 transitions, 5522 flow. Second operand 8 states and 145 transitions. [2024-06-21 20:46:31,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 486 transitions, 6834 flow [2024-06-21 20:46:32,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 486 transitions, 6704 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 20:46:32,945 INFO L231 Difference]: Finished difference. Result has 327 places, 460 transitions, 5603 flow [2024-06-21 20:46:32,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5392, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5603, PETRI_PLACES=327, PETRI_TRANSITIONS=460} [2024-06-21 20:46:32,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-21 20:46:32,945 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 460 transitions, 5603 flow [2024-06-21 20:46:32,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:46:32,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:32,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:32,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 20:46:32,946 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:32,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:32,946 INFO L85 PathProgramCache]: Analyzing trace with hash -573361653, now seen corresponding path program 2 times [2024-06-21 20:46:32,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:32,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86432661] [2024-06-21 20:46:32,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:32,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:33,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:33,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86432661] [2024-06-21 20:46:33,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86432661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:33,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:33,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:46:33,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854126846] [2024-06-21 20:46:33,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:33,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:46:33,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:33,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:46:33,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:46:33,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:46:33,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 460 transitions, 5603 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:46:33,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:33,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:46:33,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:35,486 INFO L124 PetriNetUnfolderBase]: 3793/6044 cut-off events. [2024-06-21 20:46:35,486 INFO L125 PetriNetUnfolderBase]: For 720109/720111 co-relation queries the response was YES. [2024-06-21 20:46:35,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53709 conditions, 6044 events. 3793/6044 cut-off events. For 720109/720111 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 36892 event pairs, 875 based on Foata normal form. 4/6045 useless extension candidates. Maximal degree in co-relation 53559. Up to 5773 conditions per place. [2024-06-21 20:46:35,570 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 422 selfloop transitions, 57 changer transitions 0/483 dead transitions. [2024-06-21 20:46:35,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 483 transitions, 6677 flow [2024-06-21 20:46:35,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:35,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:35,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 20:46:35,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 20:46:35,571 INFO L175 Difference]: Start difference. First operand has 327 places, 460 transitions, 5603 flow. Second operand 8 states and 140 transitions. [2024-06-21 20:46:35,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 483 transitions, 6677 flow [2024-06-21 20:46:37,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 483 transitions, 6534 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-21 20:46:37,476 INFO L231 Difference]: Finished difference. Result has 331 places, 462 transitions, 5633 flow [2024-06-21 20:46:37,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5480, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5633, PETRI_PLACES=331, PETRI_TRANSITIONS=462} [2024-06-21 20:46:37,477 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-21 20:46:37,477 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 462 transitions, 5633 flow [2024-06-21 20:46:37,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:46:37,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:37,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:37,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 20:46:37,477 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:37,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:37,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1488972993, now seen corresponding path program 3 times [2024-06-21 20:46:37,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:37,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109473455] [2024-06-21 20:46:37,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:37,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:38,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:38,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109473455] [2024-06-21 20:46:38,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109473455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:38,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:38,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:46:38,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093540841] [2024-06-21 20:46:38,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:38,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:46:38,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:38,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:46:38,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:46:38,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:46:38,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 462 transitions, 5633 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:46:38,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:38,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:46:38,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:39,755 INFO L124 PetriNetUnfolderBase]: 3801/6052 cut-off events. [2024-06-21 20:46:39,755 INFO L125 PetriNetUnfolderBase]: For 734361/734361 co-relation queries the response was YES. [2024-06-21 20:46:39,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53918 conditions, 6052 events. 3801/6052 cut-off events. For 734361/734361 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 36895 event pairs, 775 based on Foata normal form. 2/6051 useless extension candidates. Maximal degree in co-relation 53766. Up to 5785 conditions per place. [2024-06-21 20:46:39,839 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 421 selfloop transitions, 55 changer transitions 0/480 dead transitions. [2024-06-21 20:46:39,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 480 transitions, 6667 flow [2024-06-21 20:46:39,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:39,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 20:46:39,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 20:46:39,840 INFO L175 Difference]: Start difference. First operand has 331 places, 462 transitions, 5633 flow. Second operand 8 states and 135 transitions. [2024-06-21 20:46:39,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 480 transitions, 6667 flow [2024-06-21 20:46:41,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 480 transitions, 6534 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 20:46:41,865 INFO L231 Difference]: Finished difference. Result has 333 places, 464 transitions, 5653 flow [2024-06-21 20:46:41,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5500, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5653, PETRI_PLACES=333, PETRI_TRANSITIONS=464} [2024-06-21 20:46:41,866 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-21 20:46:41,866 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 464 transitions, 5653 flow [2024-06-21 20:46:41,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:46:41,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:41,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:41,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 20:46:41,866 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:41,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:41,867 INFO L85 PathProgramCache]: Analyzing trace with hash -2038788481, now seen corresponding path program 4 times [2024-06-21 20:46:41,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:41,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364807430] [2024-06-21 20:46:41,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:41,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:42,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:42,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:42,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364807430] [2024-06-21 20:46:42,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364807430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:42,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:42,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:46:42,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259205276] [2024-06-21 20:46:42,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:42,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:46:42,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:42,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:46:42,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:46:42,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:46:42,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 464 transitions, 5653 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:46:42,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:42,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:46:42,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:44,046 INFO L124 PetriNetUnfolderBase]: 3811/6071 cut-off events. [2024-06-21 20:46:44,046 INFO L125 PetriNetUnfolderBase]: For 750048/750054 co-relation queries the response was YES. [2024-06-21 20:46:44,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54241 conditions, 6071 events. 3811/6071 cut-off events. For 750048/750054 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 37064 event pairs, 880 based on Foata normal form. 6/6070 useless extension candidates. Maximal degree in co-relation 54088. Up to 5713 conditions per place. [2024-06-21 20:46:44,136 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 434 selfloop transitions, 50 changer transitions 0/488 dead transitions. [2024-06-21 20:46:44,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 488 transitions, 6807 flow [2024-06-21 20:46:44,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:44,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:44,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 20:46:44,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-21 20:46:44,137 INFO L175 Difference]: Start difference. First operand has 333 places, 464 transitions, 5653 flow. Second operand 8 states and 142 transitions. [2024-06-21 20:46:44,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 488 transitions, 6807 flow [2024-06-21 20:46:46,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 488 transitions, 6674 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 20:46:46,464 INFO L231 Difference]: Finished difference. Result has 335 places, 467 transitions, 5733 flow [2024-06-21 20:46:46,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5520, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5733, PETRI_PLACES=335, PETRI_TRANSITIONS=467} [2024-06-21 20:46:46,465 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-21 20:46:46,465 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 467 transitions, 5733 flow [2024-06-21 20:46:46,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:46:46,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:46,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:46,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 20:46:46,466 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:46,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:46,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1629592641, now seen corresponding path program 4 times [2024-06-21 20:46:46,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:46,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371206119] [2024-06-21 20:46:46,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:46,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:47,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:47,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371206119] [2024-06-21 20:46:47,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371206119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:47,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:47,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:46:47,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762641704] [2024-06-21 20:46:47,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:47,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:46:47,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:47,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:46:47,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:46:47,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:46:47,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 467 transitions, 5733 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:46:47,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:47,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:46:47,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:48,531 INFO L124 PetriNetUnfolderBase]: 3845/6114 cut-off events. [2024-06-21 20:46:48,532 INFO L125 PetriNetUnfolderBase]: For 782511/782517 co-relation queries the response was YES. [2024-06-21 20:46:48,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55550 conditions, 6114 events. 3845/6114 cut-off events. For 782511/782517 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 37283 event pairs, 877 based on Foata normal form. 6/6112 useless extension candidates. Maximal degree in co-relation 55396. Up to 5643 conditions per place. [2024-06-21 20:46:48,607 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 400 selfloop transitions, 102 changer transitions 0/506 dead transitions. [2024-06-21 20:46:48,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 506 transitions, 7522 flow [2024-06-21 20:46:48,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:48,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:48,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 20:46:48,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 20:46:48,609 INFO L175 Difference]: Start difference. First operand has 335 places, 467 transitions, 5733 flow. Second operand 8 states and 145 transitions. [2024-06-21 20:46:48,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 506 transitions, 7522 flow [2024-06-21 20:46:51,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 506 transitions, 7339 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 20:46:51,344 INFO L231 Difference]: Finished difference. Result has 338 places, 482 transitions, 6136 flow [2024-06-21 20:46:51,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5550, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6136, PETRI_PLACES=338, PETRI_TRANSITIONS=482} [2024-06-21 20:46:51,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-21 20:46:51,345 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 482 transitions, 6136 flow [2024-06-21 20:46:51,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:46:51,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:51,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:51,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 20:46:51,346 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:51,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:51,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1629592827, now seen corresponding path program 5 times [2024-06-21 20:46:51,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:51,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834619200] [2024-06-21 20:46:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:51,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:52,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:52,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834619200] [2024-06-21 20:46:52,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834619200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:52,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:52,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:46:52,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24118862] [2024-06-21 20:46:52,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:52,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:46:52,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:52,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:46:52,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:46:52,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:46:52,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 482 transitions, 6136 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:52,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:52,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:46:52,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:53,651 INFO L124 PetriNetUnfolderBase]: 3879/6168 cut-off events. [2024-06-21 20:46:53,651 INFO L125 PetriNetUnfolderBase]: For 818663/818669 co-relation queries the response was YES. [2024-06-21 20:46:53,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57325 conditions, 6168 events. 3879/6168 cut-off events. For 818663/818669 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 37672 event pairs, 882 based on Foata normal form. 6/6166 useless extension candidates. Maximal degree in co-relation 57169. Up to 5618 conditions per place. [2024-06-21 20:46:53,878 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 406 selfloop transitions, 104 changer transitions 0/514 dead transitions. [2024-06-21 20:46:53,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 514 transitions, 8154 flow [2024-06-21 20:46:53,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:46:53,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:46:53,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 20:46:53,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 20:46:53,879 INFO L175 Difference]: Start difference. First operand has 338 places, 482 transitions, 6136 flow. Second operand 8 states and 146 transitions. [2024-06-21 20:46:53,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 514 transitions, 8154 flow [2024-06-21 20:46:55,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 514 transitions, 7982 flow, removed 67 selfloop flow, removed 3 redundant places. [2024-06-21 20:46:55,988 INFO L231 Difference]: Finished difference. Result has 343 places, 491 transitions, 6508 flow [2024-06-21 20:46:55,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5964, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6508, PETRI_PLACES=343, PETRI_TRANSITIONS=491} [2024-06-21 20:46:55,988 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-21 20:46:55,988 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 491 transitions, 6508 flow [2024-06-21 20:46:55,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:55,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:55,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:55,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 20:46:55,989 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:46:55,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:55,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1401811647, now seen corresponding path program 6 times [2024-06-21 20:46:55,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:55,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259690178] [2024-06-21 20:46:55,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:55,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:56,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:56,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259690178] [2024-06-21 20:46:56,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259690178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:56,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:56,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:46:56,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318215883] [2024-06-21 20:46:56,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:56,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:46:56,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:56,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:46:56,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:46:56,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:46:56,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 491 transitions, 6508 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:46:56,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:56,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:46:56,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:58,194 INFO L124 PetriNetUnfolderBase]: 3889/6179 cut-off events. [2024-06-21 20:46:58,194 INFO L125 PetriNetUnfolderBase]: For 839830/839836 co-relation queries the response was YES. [2024-06-21 20:46:58,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58136 conditions, 6179 events. 3889/6179 cut-off events. For 839830/839836 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 37711 event pairs, 874 based on Foata normal form. 6/6177 useless extension candidates. Maximal degree in co-relation 57978. Up to 5793 conditions per place. [2024-06-21 20:46:58,280 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 452 selfloop transitions, 65 changer transitions 0/521 dead transitions. [2024-06-21 20:46:58,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 521 transitions, 7970 flow [2024-06-21 20:46:58,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:46:58,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:46:58,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-21 20:46:58,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-21 20:46:58,282 INFO L175 Difference]: Start difference. First operand has 343 places, 491 transitions, 6508 flow. Second operand 10 states and 171 transitions. [2024-06-21 20:46:58,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 521 transitions, 7970 flow [2024-06-21 20:47:00,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 521 transitions, 7644 flow, removed 122 selfloop flow, removed 3 redundant places. [2024-06-21 20:47:00,775 INFO L231 Difference]: Finished difference. Result has 351 places, 494 transitions, 6443 flow [2024-06-21 20:47:00,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6214, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6443, PETRI_PLACES=351, PETRI_TRANSITIONS=494} [2024-06-21 20:47:00,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-21 20:47:00,775 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 494 transitions, 6443 flow [2024-06-21 20:47:00,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:47:00,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:00,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:00,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 20:47:00,776 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:00,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:00,776 INFO L85 PathProgramCache]: Analyzing trace with hash -287804227, now seen corresponding path program 7 times [2024-06-21 20:47:00,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:00,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463469995] [2024-06-21 20:47:00,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:00,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:01,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:01,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463469995] [2024-06-21 20:47:01,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463469995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:01,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:01,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:47:01,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147065400] [2024-06-21 20:47:01,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:01,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:47:01,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:01,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:47:01,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:47:01,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:47:01,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 494 transitions, 6443 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:47:01,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:01,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:47:01,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:03,083 INFO L124 PetriNetUnfolderBase]: 3883/6169 cut-off events. [2024-06-21 20:47:03,083 INFO L125 PetriNetUnfolderBase]: For 842821/842827 co-relation queries the response was YES. [2024-06-21 20:47:03,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57831 conditions, 6169 events. 3883/6169 cut-off events. For 842821/842827 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 37634 event pairs, 873 based on Foata normal form. 6/6167 useless extension candidates. Maximal degree in co-relation 57670. Up to 5788 conditions per place. [2024-06-21 20:47:03,182 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 444 selfloop transitions, 66 changer transitions 0/514 dead transitions. [2024-06-21 20:47:03,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 514 transitions, 7557 flow [2024-06-21 20:47:03,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:47:03,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:47:03,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 20:47:03,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-21 20:47:03,183 INFO L175 Difference]: Start difference. First operand has 351 places, 494 transitions, 6443 flow. Second operand 9 states and 150 transitions. [2024-06-21 20:47:03,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 514 transitions, 7557 flow [2024-06-21 20:47:05,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 514 transitions, 7345 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-21 20:47:05,675 INFO L231 Difference]: Finished difference. Result has 352 places, 494 transitions, 6369 flow [2024-06-21 20:47:05,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6231, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6369, PETRI_PLACES=352, PETRI_TRANSITIONS=494} [2024-06-21 20:47:05,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-21 20:47:05,676 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 494 transitions, 6369 flow [2024-06-21 20:47:05,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:47:05,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:05,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:05,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 20:47:05,696 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:05,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:05,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1275092637, now seen corresponding path program 8 times [2024-06-21 20:47:05,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:05,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667471004] [2024-06-21 20:47:05,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:05,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:05,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:06,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:06,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667471004] [2024-06-21 20:47:06,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667471004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:06,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:06,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:47:06,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918903597] [2024-06-21 20:47:06,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:06,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:47:06,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:06,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:47:06,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:47:06,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:47:06,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 494 transitions, 6369 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:47:06,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:06,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:47:06,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:07,818 INFO L124 PetriNetUnfolderBase]: 3909/6214 cut-off events. [2024-06-21 20:47:07,818 INFO L125 PetriNetUnfolderBase]: For 868617/868623 co-relation queries the response was YES. [2024-06-21 20:47:07,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58505 conditions, 6214 events. 3909/6214 cut-off events. For 868617/868623 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 38031 event pairs, 881 based on Foata normal form. 6/6212 useless extension candidates. Maximal degree in co-relation 58343. Up to 5648 conditions per place. [2024-06-21 20:47:07,907 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 393 selfloop transitions, 122 changer transitions 0/519 dead transitions. [2024-06-21 20:47:07,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 519 transitions, 8063 flow [2024-06-21 20:47:07,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:47:07,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:47:07,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 20:47:07,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-21 20:47:07,908 INFO L175 Difference]: Start difference. First operand has 352 places, 494 transitions, 6369 flow. Second operand 8 states and 142 transitions. [2024-06-21 20:47:07,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 519 transitions, 8063 flow [2024-06-21 20:47:10,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 519 transitions, 7931 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 20:47:10,381 INFO L231 Difference]: Finished difference. Result has 352 places, 500 transitions, 6663 flow [2024-06-21 20:47:10,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6237, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6663, PETRI_PLACES=352, PETRI_TRANSITIONS=500} [2024-06-21 20:47:10,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-21 20:47:10,382 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 500 transitions, 6663 flow [2024-06-21 20:47:10,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:47:10,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:10,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:10,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 20:47:10,383 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:10,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:10,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1684520791, now seen corresponding path program 9 times [2024-06-21 20:47:10,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:10,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115905670] [2024-06-21 20:47:10,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:10,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:11,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:11,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115905670] [2024-06-21 20:47:11,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115905670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:11,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:11,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:47:11,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391312097] [2024-06-21 20:47:11,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:11,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:47:11,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:11,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:47:11,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:47:11,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:47:11,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 500 transitions, 6663 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:47:11,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:11,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:47:11,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:12,536 INFO L124 PetriNetUnfolderBase]: 3903/6206 cut-off events. [2024-06-21 20:47:12,536 INFO L125 PetriNetUnfolderBase]: For 876330/876336 co-relation queries the response was YES. [2024-06-21 20:47:12,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58556 conditions, 6206 events. 3903/6206 cut-off events. For 876330/876336 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 37953 event pairs, 881 based on Foata normal form. 6/6204 useless extension candidates. Maximal degree in co-relation 58393. Up to 5643 conditions per place. [2024-06-21 20:47:12,627 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 395 selfloop transitions, 119 changer transitions 0/518 dead transitions. [2024-06-21 20:47:12,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 518 transitions, 7989 flow [2024-06-21 20:47:12,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:47:12,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:47:12,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 20:47:12,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 20:47:12,629 INFO L175 Difference]: Start difference. First operand has 352 places, 500 transitions, 6663 flow. Second operand 8 states and 141 transitions. [2024-06-21 20:47:12,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 518 transitions, 7989 flow [2024-06-21 20:47:14,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 518 transitions, 7678 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-21 20:47:14,781 INFO L231 Difference]: Finished difference. Result has 355 places, 500 transitions, 6596 flow [2024-06-21 20:47:14,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6352, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6596, PETRI_PLACES=355, PETRI_TRANSITIONS=500} [2024-06-21 20:47:14,785 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-21 20:47:14,785 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 500 transitions, 6596 flow [2024-06-21 20:47:14,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:47:14,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:14,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:14,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 20:47:14,785 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:14,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:14,786 INFO L85 PathProgramCache]: Analyzing trace with hash -847826913, now seen corresponding path program 5 times [2024-06-21 20:47:14,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:14,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488600522] [2024-06-21 20:47:14,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:14,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:15,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:15,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:15,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488600522] [2024-06-21 20:47:15,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488600522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:15,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:15,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:47:15,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748702305] [2024-06-21 20:47:15,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:15,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:47:15,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:15,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:47:15,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:47:15,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:47:15,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 500 transitions, 6596 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:15,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:15,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:47:15,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:16,910 INFO L124 PetriNetUnfolderBase]: 3929/6243 cut-off events. [2024-06-21 20:47:16,911 INFO L125 PetriNetUnfolderBase]: For 901105/901111 co-relation queries the response was YES. [2024-06-21 20:47:16,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58983 conditions, 6243 events. 3929/6243 cut-off events. For 901105/901111 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 38223 event pairs, 874 based on Foata normal form. 6/6241 useless extension candidates. Maximal degree in co-relation 58820. Up to 5749 conditions per place. [2024-06-21 20:47:17,001 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 408 selfloop transitions, 116 changer transitions 0/528 dead transitions. [2024-06-21 20:47:17,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 528 transitions, 8269 flow [2024-06-21 20:47:17,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:47:17,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:47:17,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 20:47:17,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-21 20:47:17,003 INFO L175 Difference]: Start difference. First operand has 355 places, 500 transitions, 6596 flow. Second operand 8 states and 142 transitions. [2024-06-21 20:47:17,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 528 transitions, 8269 flow [2024-06-21 20:47:19,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 528 transitions, 8078 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:47:19,507 INFO L231 Difference]: Finished difference. Result has 357 places, 507 transitions, 6762 flow [2024-06-21 20:47:19,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6405, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6762, PETRI_PLACES=357, PETRI_TRANSITIONS=507} [2024-06-21 20:47:19,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-21 20:47:19,508 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 507 transitions, 6762 flow [2024-06-21 20:47:19,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:19,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:19,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:19,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 20:47:19,508 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:19,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:19,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1684520605, now seen corresponding path program 6 times [2024-06-21 20:47:19,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:19,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568783653] [2024-06-21 20:47:19,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:19,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:20,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:20,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568783653] [2024-06-21 20:47:20,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568783653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:20,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:20,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:47:20,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484191315] [2024-06-21 20:47:20,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:20,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:47:20,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:20,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:47:20,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:47:20,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:47:20,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 507 transitions, 6762 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:47:20,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:20,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:47:20,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:21,642 INFO L124 PetriNetUnfolderBase]: 3923/6237 cut-off events. [2024-06-21 20:47:21,643 INFO L125 PetriNetUnfolderBase]: For 909320/909326 co-relation queries the response was YES. [2024-06-21 20:47:21,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58937 conditions, 6237 events. 3923/6237 cut-off events. For 909320/909326 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 38222 event pairs, 879 based on Foata normal form. 6/6235 useless extension candidates. Maximal degree in co-relation 58773. Up to 5744 conditions per place. [2024-06-21 20:47:21,730 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 410 selfloop transitions, 114 changer transitions 0/528 dead transitions. [2024-06-21 20:47:21,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 528 transitions, 8320 flow [2024-06-21 20:47:21,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:47:21,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:47:21,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 20:47:21,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-21 20:47:21,734 INFO L175 Difference]: Start difference. First operand has 357 places, 507 transitions, 6762 flow. Second operand 9 states and 154 transitions. [2024-06-21 20:47:21,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 528 transitions, 8320 flow [2024-06-21 20:47:24,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 528 transitions, 8122 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 20:47:24,706 INFO L231 Difference]: Finished difference. Result has 362 places, 507 transitions, 6798 flow [2024-06-21 20:47:24,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6564, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6798, PETRI_PLACES=362, PETRI_TRANSITIONS=507} [2024-06-21 20:47:24,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-21 20:47:24,721 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 507 transitions, 6798 flow [2024-06-21 20:47:24,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:47:24,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:24,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:24,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 20:47:24,721 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:24,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:24,721 INFO L85 PathProgramCache]: Analyzing trace with hash 883091853, now seen corresponding path program 7 times [2024-06-21 20:47:24,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:24,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125623078] [2024-06-21 20:47:24,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:24,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:25,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:25,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125623078] [2024-06-21 20:47:25,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125623078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:25,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:25,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:47:25,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317030182] [2024-06-21 20:47:25,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:25,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:47:25,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:25,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:47:25,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:47:25,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:47:25,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 507 transitions, 6798 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:25,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:25,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:47:25,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:27,041 INFO L124 PetriNetUnfolderBase]: 3949/6274 cut-off events. [2024-06-21 20:47:27,041 INFO L125 PetriNetUnfolderBase]: For 936803/936809 co-relation queries the response was YES. [2024-06-21 20:47:27,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59596 conditions, 6274 events. 3949/6274 cut-off events. For 936803/936809 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 38404 event pairs, 894 based on Foata normal form. 6/6272 useless extension candidates. Maximal degree in co-relation 59431. Up to 6011 conditions per place. [2024-06-21 20:47:27,141 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 467 selfloop transitions, 56 changer transitions 0/527 dead transitions. [2024-06-21 20:47:27,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 527 transitions, 8251 flow [2024-06-21 20:47:27,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:47:27,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:47:27,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 20:47:27,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 20:47:27,142 INFO L175 Difference]: Start difference. First operand has 362 places, 507 transitions, 6798 flow. Second operand 8 states and 132 transitions. [2024-06-21 20:47:27,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 527 transitions, 8251 flow [2024-06-21 20:47:30,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 527 transitions, 8015 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 20:47:30,181 INFO L231 Difference]: Finished difference. Result has 365 places, 514 transitions, 6858 flow [2024-06-21 20:47:30,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6576, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6858, PETRI_PLACES=365, PETRI_TRANSITIONS=514} [2024-06-21 20:47:30,181 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-21 20:47:30,181 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 514 transitions, 6858 flow [2024-06-21 20:47:30,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:30,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:30,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:30,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 20:47:30,182 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:30,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:30,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1257748511, now seen corresponding path program 8 times [2024-06-21 20:47:30,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:30,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741614456] [2024-06-21 20:47:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:30,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:30,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:30,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741614456] [2024-06-21 20:47:30,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741614456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:30,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:30,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:47:30,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102540930] [2024-06-21 20:47:30,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:30,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:47:30,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:30,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:47:30,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:47:30,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:47:30,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 514 transitions, 6858 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:30,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:30,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:47:30,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:32,363 INFO L124 PetriNetUnfolderBase]: 3959/6294 cut-off events. [2024-06-21 20:47:32,363 INFO L125 PetriNetUnfolderBase]: For 952673/952679 co-relation queries the response was YES. [2024-06-21 20:47:32,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59739 conditions, 6294 events. 3959/6294 cut-off events. For 952673/952679 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 38554 event pairs, 890 based on Foata normal form. 6/6292 useless extension candidates. Maximal degree in co-relation 59572. Up to 6051 conditions per place. [2024-06-21 20:47:32,444 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 479 selfloop transitions, 46 changer transitions 0/529 dead transitions. [2024-06-21 20:47:32,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 529 transitions, 8038 flow [2024-06-21 20:47:32,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:47:32,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:47:32,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 20:47:32,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-21 20:47:32,445 INFO L175 Difference]: Start difference. First operand has 365 places, 514 transitions, 6858 flow. Second operand 8 states and 129 transitions. [2024-06-21 20:47:32,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 529 transitions, 8038 flow [2024-06-21 20:47:35,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 529 transitions, 7886 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 20:47:35,084 INFO L231 Difference]: Finished difference. Result has 368 places, 518 transitions, 6896 flow [2024-06-21 20:47:35,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6722, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6896, PETRI_PLACES=368, PETRI_TRANSITIONS=518} [2024-06-21 20:47:35,085 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-21 20:47:35,085 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 518 transitions, 6896 flow [2024-06-21 20:47:35,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:35,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:35,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:35,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 20:47:35,085 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:35,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:35,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1109274757, now seen corresponding path program 9 times [2024-06-21 20:47:35,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:35,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973785851] [2024-06-21 20:47:35,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:35,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:35,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:35,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973785851] [2024-06-21 20:47:35,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973785851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:35,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:35,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:47:35,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145710750] [2024-06-21 20:47:35,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:35,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:47:35,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:35,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:47:35,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:47:35,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:47:35,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 518 transitions, 6896 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:47:35,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:35,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:47:35,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:37,345 INFO L124 PetriNetUnfolderBase]: 3969/6308 cut-off events. [2024-06-21 20:47:37,345 INFO L125 PetriNetUnfolderBase]: For 969456/969462 co-relation queries the response was YES. [2024-06-21 20:47:37,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59905 conditions, 6308 events. 3969/6308 cut-off events. For 969456/969462 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 38669 event pairs, 878 based on Foata normal form. 6/6306 useless extension candidates. Maximal degree in co-relation 59738. Up to 5951 conditions per place. [2024-06-21 20:47:37,426 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 441 selfloop transitions, 91 changer transitions 0/536 dead transitions. [2024-06-21 20:47:37,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 536 transitions, 8507 flow [2024-06-21 20:47:37,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:47:37,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:47:37,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 20:47:37,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-21 20:47:37,427 INFO L175 Difference]: Start difference. First operand has 368 places, 518 transitions, 6896 flow. Second operand 9 states and 147 transitions. [2024-06-21 20:47:37,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 536 transitions, 8507 flow [2024-06-21 20:47:40,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 536 transitions, 8395 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 20:47:40,762 INFO L231 Difference]: Finished difference. Result has 372 places, 521 transitions, 7035 flow [2024-06-21 20:47:40,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6784, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7035, PETRI_PLACES=372, PETRI_TRANSITIONS=521} [2024-06-21 20:47:40,763 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-21 20:47:40,763 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 521 transitions, 7035 flow [2024-06-21 20:47:40,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:47:40,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:40,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:40,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 20:47:40,764 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:40,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:40,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1035382535, now seen corresponding path program 10 times [2024-06-21 20:47:40,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:40,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072885659] [2024-06-21 20:47:40,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:40,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:41,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:41,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072885659] [2024-06-21 20:47:41,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072885659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:41,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:41,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:47:41,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192203819] [2024-06-21 20:47:41,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:41,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:47:41,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:41,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:47:41,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:47:41,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:47:41,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 521 transitions, 7035 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:47:41,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:41,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:47:41,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:43,024 INFO L124 PetriNetUnfolderBase]: 3979/6326 cut-off events. [2024-06-21 20:47:43,025 INFO L125 PetriNetUnfolderBase]: For 988157/988163 co-relation queries the response was YES. [2024-06-21 20:47:43,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60377 conditions, 6326 events. 3979/6326 cut-off events. For 988157/988163 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 38873 event pairs, 878 based on Foata normal form. 6/6324 useless extension candidates. Maximal degree in co-relation 60209. Up to 6022 conditions per place. [2024-06-21 20:47:43,108 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 474 selfloop transitions, 60 changer transitions 0/538 dead transitions. [2024-06-21 20:47:43,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 538 transitions, 8473 flow [2024-06-21 20:47:43,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:47:43,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:47:43,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 20:47:43,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-21 20:47:43,110 INFO L175 Difference]: Start difference. First operand has 372 places, 521 transitions, 7035 flow. Second operand 8 states and 133 transitions. [2024-06-21 20:47:43,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 538 transitions, 8473 flow [2024-06-21 20:47:45,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 538 transitions, 8153 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-21 20:47:45,831 INFO L231 Difference]: Finished difference. Result has 372 places, 524 transitions, 6929 flow [2024-06-21 20:47:45,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6715, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6929, PETRI_PLACES=372, PETRI_TRANSITIONS=524} [2024-06-21 20:47:45,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-21 20:47:45,832 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 524 transitions, 6929 flow [2024-06-21 20:47:45,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:47:45,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:45,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:45,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 20:47:45,833 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:45,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:45,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1035145385, now seen corresponding path program 11 times [2024-06-21 20:47:45,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:45,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665314400] [2024-06-21 20:47:45,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:45,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:46,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:46,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665314400] [2024-06-21 20:47:46,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665314400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:46,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:46,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:47:46,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510399204] [2024-06-21 20:47:46,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:46,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:47:46,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:46,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:47:46,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:47:46,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:47:46,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 524 transitions, 6929 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:47:46,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:46,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:47:46,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:48,041 INFO L124 PetriNetUnfolderBase]: 3973/6324 cut-off events. [2024-06-21 20:47:48,041 INFO L125 PetriNetUnfolderBase]: For 992805/992811 co-relation queries the response was YES. [2024-06-21 20:47:48,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60006 conditions, 6324 events. 3973/6324 cut-off events. For 992805/992811 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 38891 event pairs, 883 based on Foata normal form. 6/6322 useless extension candidates. Maximal degree in co-relation 59838. Up to 6017 conditions per place. [2024-06-21 20:47:48,149 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 478 selfloop transitions, 56 changer transitions 0/538 dead transitions. [2024-06-21 20:47:48,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 538 transitions, 8281 flow [2024-06-21 20:47:48,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:47:48,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:47:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 20:47:48,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-21 20:47:48,151 INFO L175 Difference]: Start difference. First operand has 372 places, 524 transitions, 6929 flow. Second operand 8 states and 134 transitions. [2024-06-21 20:47:48,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 538 transitions, 8281 flow [2024-06-21 20:47:51,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 538 transitions, 7871 flow, removed 68 selfloop flow, removed 8 redundant places. [2024-06-21 20:47:51,729 INFO L231 Difference]: Finished difference. Result has 372 places, 524 transitions, 6637 flow [2024-06-21 20:47:51,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6519, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6637, PETRI_PLACES=372, PETRI_TRANSITIONS=524} [2024-06-21 20:47:51,729 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-21 20:47:51,729 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 524 transitions, 6637 flow [2024-06-21 20:47:51,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:47:51,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:51,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:51,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 20:47:51,730 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:51,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:51,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1035145571, now seen corresponding path program 10 times [2024-06-21 20:47:51,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:51,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289328807] [2024-06-21 20:47:51,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:51,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:52,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:52,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289328807] [2024-06-21 20:47:52,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289328807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:52,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:52,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:47:52,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717787612] [2024-06-21 20:47:52,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:52,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:47:52,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:52,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:47:52,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:47:52,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:47:52,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 524 transitions, 6637 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:47:52,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:52,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:47:52,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:53,986 INFO L124 PetriNetUnfolderBase]: 3967/6312 cut-off events. [2024-06-21 20:47:53,986 INFO L125 PetriNetUnfolderBase]: For 989875/989881 co-relation queries the response was YES. [2024-06-21 20:47:54,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59143 conditions, 6312 events. 3967/6312 cut-off events. For 989875/989881 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 38717 event pairs, 884 based on Foata normal form. 6/6310 useless extension candidates. Maximal degree in co-relation 58975. Up to 5952 conditions per place. [2024-06-21 20:47:54,080 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 446 selfloop transitions, 88 changer transitions 0/538 dead transitions. [2024-06-21 20:47:54,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 538 transitions, 7991 flow [2024-06-21 20:47:54,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:47:54,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:47:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 20:47:54,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-21 20:47:54,082 INFO L175 Difference]: Start difference. First operand has 372 places, 524 transitions, 6637 flow. Second operand 9 states and 146 transitions. [2024-06-21 20:47:54,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 538 transitions, 7991 flow [2024-06-21 20:47:57,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 538 transitions, 7838 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 20:47:57,773 INFO L231 Difference]: Finished difference. Result has 375 places, 524 transitions, 6666 flow [2024-06-21 20:47:57,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6484, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6666, PETRI_PLACES=375, PETRI_TRANSITIONS=524} [2024-06-21 20:47:57,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 333 predicate places. [2024-06-21 20:47:57,773 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 524 transitions, 6666 flow [2024-06-21 20:47:57,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:47:57,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:57,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:57,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 20:47:57,774 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:47:57,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:57,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1010968917, now seen corresponding path program 4 times [2024-06-21 20:47:57,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:57,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222122369] [2024-06-21 20:47:57,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:57,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:58,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:58,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222122369] [2024-06-21 20:47:58,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222122369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:58,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:58,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:47:58,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618028263] [2024-06-21 20:47:58,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:58,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:47:58,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:58,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:47:58,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:47:58,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:47:58,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 524 transitions, 6666 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:47:58,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:58,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:47:58,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:00,314 INFO L124 PetriNetUnfolderBase]: 3964/6297 cut-off events. [2024-06-21 20:48:00,315 INFO L125 PetriNetUnfolderBase]: For 995921/995921 co-relation queries the response was YES. [2024-06-21 20:48:00,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59216 conditions, 6297 events. 3964/6297 cut-off events. For 995921/995921 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 38509 event pairs, 791 based on Foata normal form. 1/6284 useless extension candidates. Maximal degree in co-relation 59047. Up to 6016 conditions per place. [2024-06-21 20:48:00,396 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 477 selfloop transitions, 53 changer transitions 0/534 dead transitions. [2024-06-21 20:48:00,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 534 transitions, 7754 flow [2024-06-21 20:48:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:48:00,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:48:00,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 20:48:00,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-21 20:48:00,398 INFO L175 Difference]: Start difference. First operand has 375 places, 524 transitions, 6666 flow. Second operand 8 states and 129 transitions. [2024-06-21 20:48:00,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 534 transitions, 7754 flow [2024-06-21 20:48:03,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 534 transitions, 7568 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 20:48:03,701 INFO L231 Difference]: Finished difference. Result has 376 places, 524 transitions, 6592 flow [2024-06-21 20:48:03,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6480, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6592, PETRI_PLACES=376, PETRI_TRANSITIONS=524} [2024-06-21 20:48:03,701 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-21 20:48:03,701 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 524 transitions, 6592 flow [2024-06-21 20:48:03,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:48:03,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:03,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:03,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 20:48:03,702 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:03,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:03,702 INFO L85 PathProgramCache]: Analyzing trace with hash 903801607, now seen corresponding path program 12 times [2024-06-21 20:48:03,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:03,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879647072] [2024-06-21 20:48:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:03,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:04,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:04,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879647072] [2024-06-21 20:48:04,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879647072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:04,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:04,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:48:04,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165153547] [2024-06-21 20:48:04,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:04,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:48:04,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:04,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:48:04,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:48:04,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:48:04,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 524 transitions, 6592 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:04,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:04,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:48:04,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:05,861 INFO L124 PetriNetUnfolderBase]: 3958/6296 cut-off events. [2024-06-21 20:48:05,862 INFO L125 PetriNetUnfolderBase]: For 1007060/1007066 co-relation queries the response was YES. [2024-06-21 20:48:05,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58967 conditions, 6296 events. 3958/6296 cut-off events. For 1007060/1007066 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 38601 event pairs, 889 based on Foata normal form. 6/6294 useless extension candidates. Maximal degree in co-relation 58797. Up to 6060 conditions per place. [2024-06-21 20:48:05,967 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 497 selfloop transitions, 35 changer transitions 0/536 dead transitions. [2024-06-21 20:48:05,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 536 transitions, 7716 flow [2024-06-21 20:48:05,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:48:05,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:48:05,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 20:48:05,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-21 20:48:05,968 INFO L175 Difference]: Start difference. First operand has 376 places, 524 transitions, 6592 flow. Second operand 8 states and 129 transitions. [2024-06-21 20:48:05,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 536 transitions, 7716 flow [2024-06-21 20:48:10,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 536 transitions, 7467 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-21 20:48:10,262 INFO L231 Difference]: Finished difference. Result has 375 places, 524 transitions, 6419 flow [2024-06-21 20:48:10,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6343, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6419, PETRI_PLACES=375, PETRI_TRANSITIONS=524} [2024-06-21 20:48:10,263 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 333 predicate places. [2024-06-21 20:48:10,263 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 524 transitions, 6419 flow [2024-06-21 20:48:10,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:10,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:10,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:10,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 20:48:10,263 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:10,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:10,264 INFO L85 PathProgramCache]: Analyzing trace with hash 858014051, now seen corresponding path program 11 times [2024-06-21 20:48:10,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:10,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799549231] [2024-06-21 20:48:10,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:10,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:10,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:10,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799549231] [2024-06-21 20:48:10,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799549231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:10,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:10,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:48:10,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960456225] [2024-06-21 20:48:10,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:10,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:48:10,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:10,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:48:10,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:48:11,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:48:11,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 524 transitions, 6419 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:48:11,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:11,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:48:11,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:12,372 INFO L124 PetriNetUnfolderBase]: 3952/6288 cut-off events. [2024-06-21 20:48:12,372 INFO L125 PetriNetUnfolderBase]: For 1012916/1012922 co-relation queries the response was YES. [2024-06-21 20:48:12,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58613 conditions, 6288 events. 3952/6288 cut-off events. For 1012916/1012922 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 38629 event pairs, 888 based on Foata normal form. 6/6286 useless extension candidates. Maximal degree in co-relation 58443. Up to 6020 conditions per place. [2024-06-21 20:48:12,464 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 482 selfloop transitions, 51 changer transitions 0/537 dead transitions. [2024-06-21 20:48:12,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 537 transitions, 7761 flow [2024-06-21 20:48:12,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:48:12,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:48:12,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 20:48:12,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-21 20:48:12,465 INFO L175 Difference]: Start difference. First operand has 375 places, 524 transitions, 6419 flow. Second operand 8 states and 133 transitions. [2024-06-21 20:48:12,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 537 transitions, 7761 flow [2024-06-21 20:48:16,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 537 transitions, 7590 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 20:48:16,204 INFO L231 Difference]: Finished difference. Result has 374 places, 524 transitions, 6356 flow [2024-06-21 20:48:16,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6248, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6356, PETRI_PLACES=374, PETRI_TRANSITIONS=524} [2024-06-21 20:48:16,205 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-21 20:48:16,205 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 524 transitions, 6356 flow [2024-06-21 20:48:16,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:48:16,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:16,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:16,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 20:48:16,205 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:16,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:16,206 INFO L85 PathProgramCache]: Analyzing trace with hash 858251201, now seen corresponding path program 12 times [2024-06-21 20:48:16,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:16,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194417801] [2024-06-21 20:48:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:16,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:16,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:16,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194417801] [2024-06-21 20:48:16,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194417801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:16,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:16,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:48:16,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245410902] [2024-06-21 20:48:16,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:16,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:48:16,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:16,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:48:16,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:48:16,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:48:16,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 524 transitions, 6356 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:16,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:16,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:48:16,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:18,381 INFO L124 PetriNetUnfolderBase]: 3946/6276 cut-off events. [2024-06-21 20:48:18,381 INFO L125 PetriNetUnfolderBase]: For 1017647/1017653 co-relation queries the response was YES. [2024-06-21 20:48:18,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58455 conditions, 6276 events. 3946/6276 cut-off events. For 1017647/1017653 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 38490 event pairs, 889 based on Foata normal form. 6/6274 useless extension candidates. Maximal degree in co-relation 58284. Up to 6035 conditions per place. [2024-06-21 20:48:18,471 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 488 selfloop transitions, 43 changer transitions 0/535 dead transitions. [2024-06-21 20:48:18,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 535 transitions, 7462 flow [2024-06-21 20:48:18,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:48:18,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:48:18,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 20:48:18,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-21 20:48:18,472 INFO L175 Difference]: Start difference. First operand has 374 places, 524 transitions, 6356 flow. Second operand 8 states and 130 transitions. [2024-06-21 20:48:18,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 535 transitions, 7462 flow [2024-06-21 20:48:21,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 535 transitions, 7330 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 20:48:21,986 INFO L231 Difference]: Finished difference. Result has 377 places, 524 transitions, 6316 flow [2024-06-21 20:48:21,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6224, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6316, PETRI_PLACES=377, PETRI_TRANSITIONS=524} [2024-06-21 20:48:21,986 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-21 20:48:21,986 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 524 transitions, 6316 flow [2024-06-21 20:48:21,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:21,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:21,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:21,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 20:48:21,987 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:21,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:21,987 INFO L85 PathProgramCache]: Analyzing trace with hash 857890733, now seen corresponding path program 4 times [2024-06-21 20:48:21,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:21,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574703784] [2024-06-21 20:48:21,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:21,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:22,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:22,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574703784] [2024-06-21 20:48:22,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574703784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:22,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:22,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:48:22,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164543271] [2024-06-21 20:48:22,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:22,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:48:22,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:22,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:48:22,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:48:22,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:48:22,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 524 transitions, 6316 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:48:22,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:22,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:48:22,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:24,689 INFO L124 PetriNetUnfolderBase]: 3941/6266 cut-off events. [2024-06-21 20:48:24,689 INFO L125 PetriNetUnfolderBase]: For 1022456/1022456 co-relation queries the response was YES. [2024-06-21 20:48:24,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58282 conditions, 6266 events. 3941/6266 cut-off events. For 1022456/1022456 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 38369 event pairs, 787 based on Foata normal form. 2/6254 useless extension candidates. Maximal degree in co-relation 58110. Up to 5982 conditions per place. [2024-06-21 20:48:24,799 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 479 selfloop transitions, 52 changer transitions 0/535 dead transitions. [2024-06-21 20:48:24,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 535 transitions, 7408 flow [2024-06-21 20:48:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:48:24,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:48:24,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 20:48:24,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-21 20:48:24,801 INFO L175 Difference]: Start difference. First operand has 377 places, 524 transitions, 6316 flow. Second operand 8 states and 129 transitions. [2024-06-21 20:48:24,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 535 transitions, 7408 flow [2024-06-21 20:48:28,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 535 transitions, 7265 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 20:48:28,924 INFO L231 Difference]: Finished difference. Result has 377 places, 524 transitions, 6282 flow [2024-06-21 20:48:28,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6173, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6282, PETRI_PLACES=377, PETRI_TRANSITIONS=524} [2024-06-21 20:48:28,924 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-21 20:48:28,924 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 524 transitions, 6282 flow [2024-06-21 20:48:28,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:48:28,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:28,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:28,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 20:48:28,925 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:28,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:28,926 INFO L85 PathProgramCache]: Analyzing trace with hash 131603165, now seen corresponding path program 13 times [2024-06-21 20:48:28,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:28,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064922376] [2024-06-21 20:48:28,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:28,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:29,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:29,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064922376] [2024-06-21 20:48:29,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064922376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:29,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:29,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:48:29,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12535235] [2024-06-21 20:48:29,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:29,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:48:29,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:29,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:48:29,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:48:29,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:48:29,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 524 transitions, 6282 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:48:29,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:29,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:48:29,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:31,198 INFO L124 PetriNetUnfolderBase]: 3970/6310 cut-off events. [2024-06-21 20:48:31,199 INFO L125 PetriNetUnfolderBase]: For 1027434/1027436 co-relation queries the response was YES. [2024-06-21 20:48:31,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58452 conditions, 6310 events. 3970/6310 cut-off events. For 1027434/1027436 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 38676 event pairs, 887 based on Foata normal form. 4/6311 useless extension candidates. Maximal degree in co-relation 58279. Up to 5974 conditions per place. [2024-06-21 20:48:31,293 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 481 selfloop transitions, 78 changer transitions 0/563 dead transitions. [2024-06-21 20:48:31,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 563 transitions, 7684 flow [2024-06-21 20:48:31,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:48:31,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:48:31,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:48:31,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:48:31,294 INFO L175 Difference]: Start difference. First operand has 377 places, 524 transitions, 6282 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:48:31,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 563 transitions, 7684 flow [2024-06-21 20:48:35,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 563 transitions, 7523 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 20:48:35,272 INFO L231 Difference]: Finished difference. Result has 380 places, 537 transitions, 6499 flow [2024-06-21 20:48:35,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6125, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6499, PETRI_PLACES=380, PETRI_TRANSITIONS=537} [2024-06-21 20:48:35,273 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-21 20:48:35,273 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 537 transitions, 6499 flow [2024-06-21 20:48:35,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-21 20:48:35,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:35,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:35,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 20:48:35,273 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:35,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:35,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1393231839, now seen corresponding path program 1 times [2024-06-21 20:48:35,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:35,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703549997] [2024-06-21 20:48:35,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:35,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:36,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:36,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703549997] [2024-06-21 20:48:36,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703549997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:36,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:36,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:48:36,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891492275] [2024-06-21 20:48:36,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:36,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:48:36,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:36,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:48:36,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:48:36,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:36,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 537 transitions, 6499 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:36,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:36,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:36,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:38,042 INFO L124 PetriNetUnfolderBase]: 3855/6202 cut-off events. [2024-06-21 20:48:38,042 INFO L125 PetriNetUnfolderBase]: For 1059324/1059324 co-relation queries the response was YES. [2024-06-21 20:48:38,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58383 conditions, 6202 events. 3855/6202 cut-off events. For 1059324/1059324 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 38686 event pairs, 945 based on Foata normal form. 2/6201 useless extension candidates. Maximal degree in co-relation 58208. Up to 5787 conditions per place. [2024-06-21 20:48:38,148 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 504 selfloop transitions, 29 changer transitions 0/568 dead transitions. [2024-06-21 20:48:38,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 568 transitions, 8001 flow [2024-06-21 20:48:38,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:48:38,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:48:38,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 20:48:38,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 20:48:38,149 INFO L175 Difference]: Start difference. First operand has 380 places, 537 transitions, 6499 flow. Second operand 10 states and 175 transitions. [2024-06-21 20:48:38,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 568 transitions, 8001 flow [2024-06-21 20:48:42,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 568 transitions, 7919 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 20:48:42,618 INFO L231 Difference]: Finished difference. Result has 386 places, 541 transitions, 6612 flow [2024-06-21 20:48:42,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6417, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6612, PETRI_PLACES=386, PETRI_TRANSITIONS=541} [2024-06-21 20:48:42,619 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-21 20:48:42,619 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 541 transitions, 6612 flow [2024-06-21 20:48:42,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:42,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:42,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:42,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 20:48:42,619 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:42,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:42,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1700706535, now seen corresponding path program 1 times [2024-06-21 20:48:42,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:42,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269389724] [2024-06-21 20:48:42,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:42,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:43,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:43,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269389724] [2024-06-21 20:48:43,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269389724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:43,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:43,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:48:43,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85161538] [2024-06-21 20:48:43,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:43,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:48:43,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:43,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:48:43,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:48:43,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:43,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 541 transitions, 6612 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:43,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:43,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:43,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:45,307 INFO L124 PetriNetUnfolderBase]: 3865/6218 cut-off events. [2024-06-21 20:48:45,307 INFO L125 PetriNetUnfolderBase]: For 1084996/1084996 co-relation queries the response was YES. [2024-06-21 20:48:45,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58741 conditions, 6218 events. 3865/6218 cut-off events. For 1084996/1084996 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 38818 event pairs, 979 based on Foata normal form. 3/6218 useless extension candidates. Maximal degree in co-relation 58565. Up to 5820 conditions per place. [2024-06-21 20:48:45,404 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 503 selfloop transitions, 30 changer transitions 0/568 dead transitions. [2024-06-21 20:48:45,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 568 transitions, 7826 flow [2024-06-21 20:48:45,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:48:45,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:48:45,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-21 20:48:45,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41019955654101997 [2024-06-21 20:48:45,405 INFO L175 Difference]: Start difference. First operand has 386 places, 541 transitions, 6612 flow. Second operand 11 states and 185 transitions. [2024-06-21 20:48:45,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 568 transitions, 7826 flow [2024-06-21 20:48:49,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 568 transitions, 7711 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 20:48:49,712 INFO L231 Difference]: Finished difference. Result has 391 places, 544 transitions, 6641 flow [2024-06-21 20:48:49,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6497, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6641, PETRI_PLACES=391, PETRI_TRANSITIONS=544} [2024-06-21 20:48:49,713 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-21 20:48:49,713 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 544 transitions, 6641 flow [2024-06-21 20:48:49,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:49,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:49,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:49,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 20:48:49,713 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:49,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:49,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1802362393, now seen corresponding path program 2 times [2024-06-21 20:48:49,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:49,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620168359] [2024-06-21 20:48:49,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:49,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:50,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:50,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620168359] [2024-06-21 20:48:50,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620168359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:50,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:50,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:48:50,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991588407] [2024-06-21 20:48:50,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:50,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:48:50,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:50,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:48:50,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:48:50,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:50,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 544 transitions, 6641 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:50,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:50,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:50,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:52,567 INFO L124 PetriNetUnfolderBase]: 3860/6211 cut-off events. [2024-06-21 20:48:52,567 INFO L125 PetriNetUnfolderBase]: For 1084098/1084098 co-relation queries the response was YES. [2024-06-21 20:48:52,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58921 conditions, 6211 events. 3860/6211 cut-off events. For 1084098/1084098 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 38801 event pairs, 978 based on Foata normal form. 2/6210 useless extension candidates. Maximal degree in co-relation 58743. Up to 5823 conditions per place. [2024-06-21 20:48:52,672 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 505 selfloop transitions, 26 changer transitions 0/566 dead transitions. [2024-06-21 20:48:52,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 566 transitions, 7773 flow [2024-06-21 20:48:52,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:48:52,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:48:52,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 20:48:52,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121951219512195 [2024-06-21 20:48:52,673 INFO L175 Difference]: Start difference. First operand has 391 places, 544 transitions, 6641 flow. Second operand 10 states and 169 transitions. [2024-06-21 20:48:52,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 566 transitions, 7773 flow [2024-06-21 20:48:57,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 566 transitions, 7623 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-06-21 20:48:57,288 INFO L231 Difference]: Finished difference. Result has 392 places, 544 transitions, 6549 flow [2024-06-21 20:48:57,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6491, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6549, PETRI_PLACES=392, PETRI_TRANSITIONS=544} [2024-06-21 20:48:57,289 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-21 20:48:57,289 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 544 transitions, 6549 flow [2024-06-21 20:48:57,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:57,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:57,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:57,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 20:48:57,290 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:48:57,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:57,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1275083709, now seen corresponding path program 3 times [2024-06-21 20:48:57,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:57,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780444063] [2024-06-21 20:48:57,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:57,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:57,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:58,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:58,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780444063] [2024-06-21 20:48:58,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780444063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:58,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:58,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:48:58,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178482927] [2024-06-21 20:48:58,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:58,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:48:58,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:58,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:48:58,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:48:58,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:48:58,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 544 transitions, 6549 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:58,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:58,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:48:58,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:59,684 INFO L124 PetriNetUnfolderBase]: 3868/6223 cut-off events. [2024-06-21 20:48:59,684 INFO L125 PetriNetUnfolderBase]: For 1101713/1101713 co-relation queries the response was YES. [2024-06-21 20:48:59,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59053 conditions, 6223 events. 3868/6223 cut-off events. For 1101713/1101713 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 38879 event pairs, 979 based on Foata normal form. 2/6222 useless extension candidates. Maximal degree in co-relation 58874. Up to 5834 conditions per place. [2024-06-21 20:48:59,783 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 494 selfloop transitions, 32 changer transitions 0/561 dead transitions. [2024-06-21 20:48:59,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 561 transitions, 7715 flow [2024-06-21 20:48:59,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:48:59,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:48:59,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 20:48:59,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 20:48:59,784 INFO L175 Difference]: Start difference. First operand has 392 places, 544 transitions, 6549 flow. Second operand 9 states and 153 transitions. [2024-06-21 20:48:59,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 561 transitions, 7715 flow [2024-06-21 20:49:04,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 561 transitions, 7658 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 20:49:04,025 INFO L231 Difference]: Finished difference. Result has 392 places, 546 transitions, 6635 flow [2024-06-21 20:49:04,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6492, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6635, PETRI_PLACES=392, PETRI_TRANSITIONS=546} [2024-06-21 20:49:04,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-21 20:49:04,026 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 546 transitions, 6635 flow [2024-06-21 20:49:04,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:04,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:04,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:04,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 20:49:04,026 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:49:04,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:04,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1275083585, now seen corresponding path program 2 times [2024-06-21 20:49:04,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:04,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021931210] [2024-06-21 20:49:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:04,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:05,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:05,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021931210] [2024-06-21 20:49:05,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021931210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:05,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:05,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:49:05,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097843037] [2024-06-21 20:49:05,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:05,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:49:05,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:05,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:49:05,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:49:05,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:05,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 546 transitions, 6635 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:05,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:05,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:05,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:06,829 INFO L124 PetriNetUnfolderBase]: 3893/6259 cut-off events. [2024-06-21 20:49:06,829 INFO L125 PetriNetUnfolderBase]: For 1143160/1143164 co-relation queries the response was YES. [2024-06-21 20:49:06,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60055 conditions, 6259 events. 3893/6259 cut-off events. For 1143160/1143164 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 39138 event pairs, 981 based on Foata normal form. 3/6257 useless extension candidates. Maximal degree in co-relation 59875. Up to 5782 conditions per place. [2024-06-21 20:49:06,933 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 474 selfloop transitions, 65 changer transitions 0/574 dead transitions. [2024-06-21 20:49:06,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 574 transitions, 8169 flow [2024-06-21 20:49:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:49:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:49:06,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 20:49:06,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-21 20:49:06,934 INFO L175 Difference]: Start difference. First operand has 392 places, 546 transitions, 6635 flow. Second operand 10 states and 179 transitions. [2024-06-21 20:49:06,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 574 transitions, 8169 flow [2024-06-21 20:49:11,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 574 transitions, 8042 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 20:49:11,891 INFO L231 Difference]: Finished difference. Result has 395 places, 552 transitions, 6807 flow [2024-06-21 20:49:11,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6508, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6807, PETRI_PLACES=395, PETRI_TRANSITIONS=552} [2024-06-21 20:49:11,891 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-21 20:49:11,891 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 552 transitions, 6807 flow [2024-06-21 20:49:11,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:11,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:11,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:11,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 20:49:11,892 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:49:11,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:11,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1274905955, now seen corresponding path program 3 times [2024-06-21 20:49:11,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:11,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810061126] [2024-06-21 20:49:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:11,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:12,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:12,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810061126] [2024-06-21 20:49:12,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810061126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:12,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:12,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:49:12,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539984261] [2024-06-21 20:49:12,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:12,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:49:12,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:12,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:49:12,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:49:13,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:13,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 552 transitions, 6807 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:13,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:13,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:13,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:14,495 INFO L124 PetriNetUnfolderBase]: 3897/6260 cut-off events. [2024-06-21 20:49:14,495 INFO L125 PetriNetUnfolderBase]: For 1144707/1144709 co-relation queries the response was YES. [2024-06-21 20:49:14,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60294 conditions, 6260 events. 3897/6260 cut-off events. For 1144707/1144709 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 39041 event pairs, 981 based on Foata normal form. 2/6259 useless extension candidates. Maximal degree in co-relation 60113. Up to 5801 conditions per place. [2024-06-21 20:49:14,599 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 475 selfloop transitions, 60 changer transitions 0/570 dead transitions. [2024-06-21 20:49:14,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 570 transitions, 7935 flow [2024-06-21 20:49:14,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:49:14,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:49:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 20:49:14,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-21 20:49:14,600 INFO L175 Difference]: Start difference. First operand has 395 places, 552 transitions, 6807 flow. Second operand 9 states and 160 transitions. [2024-06-21 20:49:14,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 570 transitions, 7935 flow [2024-06-21 20:49:19,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 570 transitions, 7728 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-21 20:49:19,770 INFO L231 Difference]: Finished difference. Result has 398 places, 552 transitions, 6726 flow [2024-06-21 20:49:19,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6600, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6726, PETRI_PLACES=398, PETRI_TRANSITIONS=552} [2024-06-21 20:49:19,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-21 20:49:19,771 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 552 transitions, 6726 flow [2024-06-21 20:49:19,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:19,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:19,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:19,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 20:49:19,772 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:49:19,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:19,772 INFO L85 PathProgramCache]: Analyzing trace with hash 883345743, now seen corresponding path program 1 times [2024-06-21 20:49:19,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:19,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015597077] [2024-06-21 20:49:19,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:19,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:20,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:20,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015597077] [2024-06-21 20:49:20,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015597077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:20,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:20,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:49:20,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459451203] [2024-06-21 20:49:20,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:20,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:49:20,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:20,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:49:20,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:49:20,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:49:20,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 552 transitions, 6726 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:20,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:20,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:49:20,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:22,547 INFO L124 PetriNetUnfolderBase]: 4046/6414 cut-off events. [2024-06-21 20:49:22,547 INFO L125 PetriNetUnfolderBase]: For 1146264/1146264 co-relation queries the response was YES. [2024-06-21 20:49:22,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61281 conditions, 6414 events. 4046/6414 cut-off events. For 1146264/1146264 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 39386 event pairs, 1012 based on Foata normal form. 1/6412 useless extension candidates. Maximal degree in co-relation 61098. Up to 6217 conditions per place. [2024-06-21 20:49:22,673 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 542 selfloop transitions, 23 changer transitions 0/569 dead transitions. [2024-06-21 20:49:22,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 569 transitions, 8007 flow [2024-06-21 20:49:22,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:49:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:49:22,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 20:49:22,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-21 20:49:22,674 INFO L175 Difference]: Start difference. First operand has 398 places, 552 transitions, 6726 flow. Second operand 8 states and 127 transitions. [2024-06-21 20:49:22,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 569 transitions, 8007 flow [2024-06-21 20:49:27,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 569 transitions, 7875 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 20:49:27,539 INFO L231 Difference]: Finished difference. Result has 398 places, 558 transitions, 6781 flow [2024-06-21 20:49:27,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6598, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6781, PETRI_PLACES=398, PETRI_TRANSITIONS=558} [2024-06-21 20:49:27,539 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-21 20:49:27,539 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 558 transitions, 6781 flow [2024-06-21 20:49:27,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:27,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:27,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:27,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 20:49:27,540 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:49:27,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:27,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1263470367, now seen corresponding path program 4 times [2024-06-21 20:49:27,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:27,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315561772] [2024-06-21 20:49:27,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:27,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:28,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:28,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315561772] [2024-06-21 20:49:28,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315561772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:28,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:28,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:49:28,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915994865] [2024-06-21 20:49:28,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:28,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:49:28,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:28,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:49:28,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:49:28,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:28,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 558 transitions, 6781 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:28,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:28,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:28,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:30,220 INFO L124 PetriNetUnfolderBase]: 3905/6277 cut-off events. [2024-06-21 20:49:30,220 INFO L125 PetriNetUnfolderBase]: For 1175277/1175279 co-relation queries the response was YES. [2024-06-21 20:49:30,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60618 conditions, 6277 events. 3905/6277 cut-off events. For 1175277/1175279 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 39308 event pairs, 979 based on Foata normal form. 2/6276 useless extension candidates. Maximal degree in co-relation 60434. Up to 5891 conditions per place. [2024-06-21 20:49:30,323 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 512 selfloop transitions, 28 changer transitions 0/575 dead transitions. [2024-06-21 20:49:30,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 575 transitions, 7991 flow [2024-06-21 20:49:30,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:49:30,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:49:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 20:49:30,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-21 20:49:30,325 INFO L175 Difference]: Start difference. First operand has 398 places, 558 transitions, 6781 flow. Second operand 9 states and 149 transitions. [2024-06-21 20:49:30,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 575 transitions, 7991 flow [2024-06-21 20:49:33,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 575 transitions, 7879 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 20:49:33,578 INFO L231 Difference]: Finished difference. Result has 401 places, 561 transitions, 6825 flow [2024-06-21 20:49:33,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6669, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6825, PETRI_PLACES=401, PETRI_TRANSITIONS=561} [2024-06-21 20:49:33,579 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-21 20:49:33,593 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 561 transitions, 6825 flow [2024-06-21 20:49:33,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:33,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:33,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:33,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 20:49:33,594 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:49:33,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:33,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1035391587, now seen corresponding path program 5 times [2024-06-21 20:49:33,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:33,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202361851] [2024-06-21 20:49:33,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:33,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:34,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:34,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202361851] [2024-06-21 20:49:34,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202361851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:34,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:34,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:49:34,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54146556] [2024-06-21 20:49:34,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:34,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:49:34,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:34,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:49:34,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:49:34,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:34,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 561 transitions, 6825 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:34,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:34,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:34,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:36,128 INFO L124 PetriNetUnfolderBase]: 3921/6298 cut-off events. [2024-06-21 20:49:36,128 INFO L125 PetriNetUnfolderBase]: For 1203431/1203433 co-relation queries the response was YES. [2024-06-21 20:49:36,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61562 conditions, 6298 events. 3921/6298 cut-off events. For 1203431/1203433 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 39430 event pairs, 981 based on Foata normal form. 3/6297 useless extension candidates. Maximal degree in co-relation 61377. Up to 5861 conditions per place. [2024-06-21 20:49:36,230 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 498 selfloop transitions, 52 changer transitions 0/585 dead transitions. [2024-06-21 20:49:36,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 585 transitions, 8405 flow [2024-06-21 20:49:36,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:49:36,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:49:36,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 20:49:36,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 20:49:36,231 INFO L175 Difference]: Start difference. First operand has 401 places, 561 transitions, 6825 flow. Second operand 10 states and 170 transitions. [2024-06-21 20:49:36,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 585 transitions, 8405 flow [2024-06-21 20:49:40,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 585 transitions, 8271 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-21 20:49:40,382 INFO L231 Difference]: Finished difference. Result has 404 places, 567 transitions, 6996 flow [2024-06-21 20:49:40,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6691, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6996, PETRI_PLACES=404, PETRI_TRANSITIONS=567} [2024-06-21 20:49:40,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-21 20:49:40,382 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 567 transitions, 6996 flow [2024-06-21 20:49:40,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:40,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:40,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:40,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 20:49:40,383 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:49:40,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:40,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1035391463, now seen corresponding path program 4 times [2024-06-21 20:49:40,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:40,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131446081] [2024-06-21 20:49:40,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:40,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:41,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:41,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131446081] [2024-06-21 20:49:41,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131446081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:41,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:41,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:49:41,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216940363] [2024-06-21 20:49:41,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:41,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:49:41,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:41,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:49:41,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:49:41,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:41,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 567 transitions, 6996 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:41,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:41,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:41,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:42,880 INFO L124 PetriNetUnfolderBase]: 3916/6289 cut-off events. [2024-06-21 20:49:42,880 INFO L125 PetriNetUnfolderBase]: For 1203481/1203483 co-relation queries the response was YES. [2024-06-21 20:49:42,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61716 conditions, 6289 events. 3916/6289 cut-off events. For 1203481/1203483 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 39326 event pairs, 987 based on Foata normal form. 2/6287 useless extension candidates. Maximal degree in co-relation 61530. Up to 5929 conditions per place. [2024-06-21 20:49:42,992 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 526 selfloop transitions, 20 changer transitions 0/581 dead transitions. [2024-06-21 20:49:42,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 581 transitions, 8202 flow [2024-06-21 20:49:42,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:49:42,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:49:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 20:49:42,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-21 20:49:42,993 INFO L175 Difference]: Start difference. First operand has 404 places, 567 transitions, 6996 flow. Second operand 9 states and 146 transitions. [2024-06-21 20:49:42,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 581 transitions, 8202 flow [2024-06-21 20:49:47,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 581 transitions, 8034 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 20:49:47,266 INFO L231 Difference]: Finished difference. Result has 407 places, 569 transitions, 6959 flow [2024-06-21 20:49:47,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6828, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6959, PETRI_PLACES=407, PETRI_TRANSITIONS=569} [2024-06-21 20:49:47,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-21 20:49:47,266 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 569 transitions, 6959 flow [2024-06-21 20:49:47,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:47,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:47,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:47,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 20:49:47,267 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:49:47,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:47,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1109266821, now seen corresponding path program 6 times [2024-06-21 20:49:47,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:47,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359186480] [2024-06-21 20:49:47,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:47,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:48,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:48,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359186480] [2024-06-21 20:49:48,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359186480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:48,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:48,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:49:48,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165784777] [2024-06-21 20:49:48,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:48,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:49:48,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:48,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:49:48,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:49:48,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:49:48,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 569 transitions, 6959 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:48,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:48,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:49:48,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:49,847 INFO L124 PetriNetUnfolderBase]: 3909/6281 cut-off events. [2024-06-21 20:49:49,847 INFO L125 PetriNetUnfolderBase]: For 1199833/1199835 co-relation queries the response was YES. [2024-06-21 20:49:49,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61321 conditions, 6281 events. 3909/6281 cut-off events. For 1199833/1199835 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 39209 event pairs, 977 based on Foata normal form. 2/6280 useless extension candidates. Maximal degree in co-relation 61133. Up to 5870 conditions per place. [2024-06-21 20:49:49,949 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 509 selfloop transitions, 40 changer transitions 0/584 dead transitions. [2024-06-21 20:49:49,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 584 transitions, 8103 flow [2024-06-21 20:49:49,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:49:49,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:49:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 20:49:49,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-21 20:49:49,950 INFO L175 Difference]: Start difference. First operand has 407 places, 569 transitions, 6959 flow. Second operand 9 states and 154 transitions. [2024-06-21 20:49:49,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 584 transitions, 8103 flow [2024-06-21 20:49:54,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 584 transitions, 7938 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-21 20:49:54,388 INFO L231 Difference]: Finished difference. Result has 409 places, 569 transitions, 6880 flow [2024-06-21 20:49:54,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6794, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6880, PETRI_PLACES=409, PETRI_TRANSITIONS=569} [2024-06-21 20:49:54,388 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-21 20:49:54,389 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 569 transitions, 6880 flow [2024-06-21 20:49:54,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:54,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:54,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:54,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 20:49:54,389 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:49:54,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:54,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1476155685, now seen corresponding path program 1 times [2024-06-21 20:49:54,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:54,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640075761] [2024-06-21 20:49:54,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:54,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:55,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:55,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640075761] [2024-06-21 20:49:55,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640075761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:55,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:55,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:49:55,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313508398] [2024-06-21 20:49:55,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:55,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:49:55,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:55,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:49:55,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:49:55,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:49:55,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 569 transitions, 6880 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:55,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:55,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:49:55,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:57,173 INFO L124 PetriNetUnfolderBase]: 4075/6471 cut-off events. [2024-06-21 20:49:57,173 INFO L125 PetriNetUnfolderBase]: For 1204051/1204053 co-relation queries the response was YES. [2024-06-21 20:49:57,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62585 conditions, 6471 events. 4075/6471 cut-off events. For 1204051/1204053 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 39835 event pairs, 858 based on Foata normal form. 3/6471 useless extension candidates. Maximal degree in co-relation 62396. Up to 6120 conditions per place. [2024-06-21 20:49:57,278 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 526 selfloop transitions, 69 changer transitions 0/599 dead transitions. [2024-06-21 20:49:57,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 599 transitions, 8274 flow [2024-06-21 20:49:57,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:49:57,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:49:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 20:49:57,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 20:49:57,279 INFO L175 Difference]: Start difference. First operand has 409 places, 569 transitions, 6880 flow. Second operand 9 states and 156 transitions. [2024-06-21 20:49:57,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 599 transitions, 8274 flow [2024-06-21 20:50:01,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 599 transitions, 8176 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 20:50:01,472 INFO L231 Difference]: Finished difference. Result has 410 places, 572 transitions, 7051 flow [2024-06-21 20:50:01,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6782, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7051, PETRI_PLACES=410, PETRI_TRANSITIONS=572} [2024-06-21 20:50:01,473 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-21 20:50:01,473 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 572 transitions, 7051 flow [2024-06-21 20:50:01,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:01,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:01,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:01,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 20:50:01,473 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:50:01,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:01,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1476035715, now seen corresponding path program 2 times [2024-06-21 20:50:01,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:01,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853595700] [2024-06-21 20:50:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:01,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:01,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:02,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:02,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853595700] [2024-06-21 20:50:02,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853595700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:02,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:02,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:50:02,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494145326] [2024-06-21 20:50:02,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:02,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:50:02,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:02,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:50:02,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:50:02,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:50:02,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 572 transitions, 7051 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:02,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:02,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:50:02,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:04,221 INFO L124 PetriNetUnfolderBase]: 4080/6478 cut-off events. [2024-06-21 20:50:04,222 INFO L125 PetriNetUnfolderBase]: For 1225243/1225245 co-relation queries the response was YES. [2024-06-21 20:50:04,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63305 conditions, 6478 events. 4080/6478 cut-off events. For 1225243/1225245 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 39823 event pairs, 861 based on Foata normal form. 3/6478 useless extension candidates. Maximal degree in co-relation 63115. Up to 6056 conditions per place. [2024-06-21 20:50:04,317 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 502 selfloop transitions, 97 changer transitions 0/603 dead transitions. [2024-06-21 20:50:04,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 603 transitions, 8815 flow [2024-06-21 20:50:04,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:50:04,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:50:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 20:50:04,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-21 20:50:04,318 INFO L175 Difference]: Start difference. First operand has 410 places, 572 transitions, 7051 flow. Second operand 9 states and 160 transitions. [2024-06-21 20:50:04,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 603 transitions, 8815 flow [2024-06-21 20:50:08,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 603 transitions, 8578 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-21 20:50:08,934 INFO L231 Difference]: Finished difference. Result has 412 places, 578 transitions, 7260 flow [2024-06-21 20:50:08,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6814, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7260, PETRI_PLACES=412, PETRI_TRANSITIONS=578} [2024-06-21 20:50:08,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-21 20:50:08,934 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 578 transitions, 7260 flow [2024-06-21 20:50:08,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:08,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:08,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:08,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 20:50:08,936 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:50:08,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:08,937 INFO L85 PathProgramCache]: Analyzing trace with hash -771380019, now seen corresponding path program 1 times [2024-06-21 20:50:08,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:08,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044411982] [2024-06-21 20:50:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:08,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:09,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:09,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044411982] [2024-06-21 20:50:09,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044411982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:09,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:09,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:50:09,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834460260] [2024-06-21 20:50:09,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:09,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:50:10,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:10,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:50:10,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:50:10,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:50:10,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 578 transitions, 7260 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:10,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:10,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:50:10,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:11,762 INFO L124 PetriNetUnfolderBase]: 4085/6482 cut-off events. [2024-06-21 20:50:11,762 INFO L125 PetriNetUnfolderBase]: For 1252418/1252420 co-relation queries the response was YES. [2024-06-21 20:50:11,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63845 conditions, 6482 events. 4085/6482 cut-off events. For 1252418/1252420 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 39866 event pairs, 871 based on Foata normal form. 3/6482 useless extension candidates. Maximal degree in co-relation 63654. Up to 6075 conditions per place. [2024-06-21 20:50:11,867 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 509 selfloop transitions, 96 changer transitions 0/609 dead transitions. [2024-06-21 20:50:11,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 609 transitions, 8990 flow [2024-06-21 20:50:11,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:50:11,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:50:11,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:50:11,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:50:11,869 INFO L175 Difference]: Start difference. First operand has 412 places, 578 transitions, 7260 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:50:11,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 609 transitions, 8990 flow [2024-06-21 20:50:16,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 609 transitions, 8759 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-21 20:50:16,682 INFO L231 Difference]: Finished difference. Result has 416 places, 584 transitions, 7425 flow [2024-06-21 20:50:16,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7029, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7425, PETRI_PLACES=416, PETRI_TRANSITIONS=584} [2024-06-21 20:50:16,683 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-21 20:50:16,683 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 584 transitions, 7425 flow [2024-06-21 20:50:16,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:16,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:16,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:16,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 20:50:16,684 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:50:16,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:16,684 INFO L85 PathProgramCache]: Analyzing trace with hash -169752741, now seen corresponding path program 3 times [2024-06-21 20:50:16,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:16,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985708733] [2024-06-21 20:50:16,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:16,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:17,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:17,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985708733] [2024-06-21 20:50:17,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985708733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:17,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:17,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:50:17,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112213302] [2024-06-21 20:50:17,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:17,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:50:17,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:17,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:50:17,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:50:17,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:50:17,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 584 transitions, 7425 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:17,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:17,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:50:17,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:19,274 INFO L124 PetriNetUnfolderBase]: 4090/6483 cut-off events. [2024-06-21 20:50:19,274 INFO L125 PetriNetUnfolderBase]: For 1274027/1274029 co-relation queries the response was YES. [2024-06-21 20:50:19,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64509 conditions, 6483 events. 4090/6483 cut-off events. For 1274027/1274029 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 39806 event pairs, 884 based on Foata normal form. 3/6483 useless extension candidates. Maximal degree in co-relation 64316. Up to 6194 conditions per place. [2024-06-21 20:50:19,395 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 543 selfloop transitions, 61 changer transitions 0/608 dead transitions. [2024-06-21 20:50:19,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 608 transitions, 8787 flow [2024-06-21 20:50:19,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:50:19,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:50:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 20:50:19,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 20:50:19,397 INFO L175 Difference]: Start difference. First operand has 416 places, 584 transitions, 7425 flow. Second operand 9 states and 153 transitions. [2024-06-21 20:50:19,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 608 transitions, 8787 flow [2024-06-21 20:50:24,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 608 transitions, 8585 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-21 20:50:24,369 INFO L231 Difference]: Finished difference. Result has 421 places, 587 transitions, 7445 flow [2024-06-21 20:50:24,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7223, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7445, PETRI_PLACES=421, PETRI_TRANSITIONS=587} [2024-06-21 20:50:24,370 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-21 20:50:24,370 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 587 transitions, 7445 flow [2024-06-21 20:50:24,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:24,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:24,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:24,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 20:50:24,371 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:50:24,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:24,371 INFO L85 PathProgramCache]: Analyzing trace with hash 783235545, now seen corresponding path program 2 times [2024-06-21 20:50:24,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:24,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115440380] [2024-06-21 20:50:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:24,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:25,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:25,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:25,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115440380] [2024-06-21 20:50:25,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115440380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:25,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:25,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:50:25,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900210164] [2024-06-21 20:50:25,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:25,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:50:25,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:25,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:50:25,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:50:25,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:50:25,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 587 transitions, 7445 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:25,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:25,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:50:25,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:27,228 INFO L124 PetriNetUnfolderBase]: 4100/6497 cut-off events. [2024-06-21 20:50:27,229 INFO L125 PetriNetUnfolderBase]: For 1292158/1292160 co-relation queries the response was YES. [2024-06-21 20:50:27,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64749 conditions, 6497 events. 4100/6497 cut-off events. For 1292158/1292160 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 39859 event pairs, 887 based on Foata normal form. 3/6497 useless extension candidates. Maximal degree in co-relation 64554. Up to 6173 conditions per place. [2024-06-21 20:50:27,361 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 529 selfloop transitions, 81 changer transitions 0/614 dead transitions. [2024-06-21 20:50:27,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 614 transitions, 8812 flow [2024-06-21 20:50:27,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:50:27,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:50:27,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 20:50:27,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 20:50:27,364 INFO L175 Difference]: Start difference. First operand has 421 places, 587 transitions, 7445 flow. Second operand 9 states and 156 transitions. [2024-06-21 20:50:27,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 614 transitions, 8812 flow [2024-06-21 20:50:32,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 614 transitions, 8612 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-21 20:50:32,953 INFO L231 Difference]: Finished difference. Result has 423 places, 593 transitions, 7500 flow [2024-06-21 20:50:32,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7245, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7500, PETRI_PLACES=423, PETRI_TRANSITIONS=593} [2024-06-21 20:50:32,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-21 20:50:32,954 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 593 transitions, 7500 flow [2024-06-21 20:50:32,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:32,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:32,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:32,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 20:50:32,955 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:50:32,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:32,955 INFO L85 PathProgramCache]: Analyzing trace with hash 782998395, now seen corresponding path program 3 times [2024-06-21 20:50:32,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:32,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427007037] [2024-06-21 20:50:32,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:32,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:33,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:33,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427007037] [2024-06-21 20:50:33,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427007037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:33,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:33,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:50:33,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453292334] [2024-06-21 20:50:33,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:33,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:50:33,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:33,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:50:33,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:50:33,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:50:33,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 593 transitions, 7500 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:33,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:33,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:50:33,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:35,524 INFO L124 PetriNetUnfolderBase]: 4105/6508 cut-off events. [2024-06-21 20:50:35,525 INFO L125 PetriNetUnfolderBase]: For 1304626/1304628 co-relation queries the response was YES. [2024-06-21 20:50:35,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64580 conditions, 6508 events. 4105/6508 cut-off events. For 1304626/1304628 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 40000 event pairs, 887 based on Foata normal form. 3/6508 useless extension candidates. Maximal degree in co-relation 64384. Up to 6174 conditions per place. [2024-06-21 20:50:35,630 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 527 selfloop transitions, 86 changer transitions 0/617 dead transitions. [2024-06-21 20:50:35,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 617 transitions, 8854 flow [2024-06-21 20:50:35,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:50:35,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:50:35,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 20:50:35,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-21 20:50:35,632 INFO L175 Difference]: Start difference. First operand has 423 places, 593 transitions, 7500 flow. Second operand 9 states and 158 transitions. [2024-06-21 20:50:35,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 617 transitions, 8854 flow [2024-06-21 20:50:41,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 617 transitions, 8657 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 20:50:41,200 INFO L231 Difference]: Finished difference. Result has 426 places, 596 transitions, 7549 flow [2024-06-21 20:50:41,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7303, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7549, PETRI_PLACES=426, PETRI_TRANSITIONS=596} [2024-06-21 20:50:41,201 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-21 20:50:41,201 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 596 transitions, 7549 flow [2024-06-21 20:50:41,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:41,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:41,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:41,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 20:50:41,201 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:50:41,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:41,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1332056618, now seen corresponding path program 1 times [2024-06-21 20:50:41,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:41,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111716624] [2024-06-21 20:50:41,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:41,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:42,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:42,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111716624] [2024-06-21 20:50:42,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111716624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:42,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:42,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:50:42,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375121812] [2024-06-21 20:50:42,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:42,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:50:42,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:42,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:50:42,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:50:42,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:50:42,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 596 transitions, 7549 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:42,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:42,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:50:42,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:44,148 INFO L124 PetriNetUnfolderBase]: 4118/6522 cut-off events. [2024-06-21 20:50:44,149 INFO L125 PetriNetUnfolderBase]: For 1332174/1332176 co-relation queries the response was YES. [2024-06-21 20:50:44,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65074 conditions, 6522 events. 4118/6522 cut-off events. For 1332174/1332176 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 40052 event pairs, 883 based on Foata normal form. 3/6522 useless extension candidates. Maximal degree in co-relation 64877. Up to 6258 conditions per place. [2024-06-21 20:50:44,248 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 596 selfloop transitions, 38 changer transitions 0/638 dead transitions. [2024-06-21 20:50:44,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 638 transitions, 9429 flow [2024-06-21 20:50:44,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:50:44,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:50:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-21 20:50:44,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-21 20:50:44,249 INFO L175 Difference]: Start difference. First operand has 426 places, 596 transitions, 7549 flow. Second operand 10 states and 168 transitions. [2024-06-21 20:50:44,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 638 transitions, 9429 flow [2024-06-21 20:50:50,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 638 transitions, 9211 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 20:50:50,950 INFO L231 Difference]: Finished difference. Result has 432 places, 611 transitions, 7723 flow [2024-06-21 20:50:50,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7331, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7723, PETRI_PLACES=432, PETRI_TRANSITIONS=611} [2024-06-21 20:50:50,951 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-21 20:50:50,951 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 611 transitions, 7723 flow [2024-06-21 20:50:50,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:50,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:50,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:50,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 20:50:50,952 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:50:50,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:50,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1486779919, now seen corresponding path program 1 times [2024-06-21 20:50:50,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:50,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725795952] [2024-06-21 20:50:50,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:50,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:50,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:51,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:51,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725795952] [2024-06-21 20:50:51,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725795952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:51,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:51,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:50:51,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804984379] [2024-06-21 20:50:51,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:51,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:50:51,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:51,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:50:51,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:50:51,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:50:51,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 611 transitions, 7723 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:51,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:51,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:50:51,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:53,623 INFO L124 PetriNetUnfolderBase]: 4128/6536 cut-off events. [2024-06-21 20:50:53,623 INFO L125 PetriNetUnfolderBase]: For 1365144/1365146 co-relation queries the response was YES. [2024-06-21 20:50:53,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65866 conditions, 6536 events. 4128/6536 cut-off events. For 1365144/1365146 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 40105 event pairs, 882 based on Foata normal form. 4/6537 useless extension candidates. Maximal degree in co-relation 65665. Up to 6230 conditions per place. [2024-06-21 20:50:53,728 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 589 selfloop transitions, 44 changer transitions 0/637 dead transitions. [2024-06-21 20:50:53,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 637 transitions, 9177 flow [2024-06-21 20:50:53,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:50:53,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:50:53,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 20:50:53,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-21 20:50:53,730 INFO L175 Difference]: Start difference. First operand has 432 places, 611 transitions, 7723 flow. Second operand 9 states and 154 transitions. [2024-06-21 20:50:53,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 637 transitions, 9177 flow [2024-06-21 20:51:00,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 637 transitions, 9024 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-21 20:51:00,702 INFO L231 Difference]: Finished difference. Result has 437 places, 614 transitions, 7769 flow [2024-06-21 20:51:00,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7570, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7769, PETRI_PLACES=437, PETRI_TRANSITIONS=614} [2024-06-21 20:51:00,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-21 20:51:00,703 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 614 transitions, 7769 flow [2024-06-21 20:51:00,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:00,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:00,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:00,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 20:51:00,704 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:51:00,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:00,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1486780074, now seen corresponding path program 2 times [2024-06-21 20:51:00,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:00,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579267643] [2024-06-21 20:51:00,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:00,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:01,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:01,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579267643] [2024-06-21 20:51:01,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579267643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:01,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:01,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:51:01,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414000169] [2024-06-21 20:51:01,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:01,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:51:01,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:01,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:51:01,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:51:01,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:51:01,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 614 transitions, 7769 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:01,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:01,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:51:01,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:03,616 INFO L124 PetriNetUnfolderBase]: 4125/6527 cut-off events. [2024-06-21 20:51:03,617 INFO L125 PetriNetUnfolderBase]: For 1370424/1370426 co-relation queries the response was YES. [2024-06-21 20:51:03,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66216 conditions, 6527 events. 4125/6527 cut-off events. For 1370424/1370426 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 40016 event pairs, 882 based on Foata normal form. 3/6527 useless extension candidates. Maximal degree in co-relation 66013. Up to 6281 conditions per place. [2024-06-21 20:51:03,736 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 600 selfloop transitions, 32 changer transitions 0/636 dead transitions. [2024-06-21 20:51:03,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 636 transitions, 9105 flow [2024-06-21 20:51:03,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:51:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:51:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 20:51:03,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-21 20:51:03,738 INFO L175 Difference]: Start difference. First operand has 437 places, 614 transitions, 7769 flow. Second operand 9 states and 150 transitions. [2024-06-21 20:51:03,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 636 transitions, 9105 flow [2024-06-21 20:51:09,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 636 transitions, 8888 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-21 20:51:09,344 INFO L231 Difference]: Finished difference. Result has 439 places, 614 transitions, 7622 flow [2024-06-21 20:51:09,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7552, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7622, PETRI_PLACES=439, PETRI_TRANSITIONS=614} [2024-06-21 20:51:09,344 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-21 20:51:09,344 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 614 transitions, 7622 flow [2024-06-21 20:51:09,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:09,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:09,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:09,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 20:51:09,345 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:51:09,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:09,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1483055052, now seen corresponding path program 1 times [2024-06-21 20:51:09,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:09,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401639905] [2024-06-21 20:51:09,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:09,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:10,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:10,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401639905] [2024-06-21 20:51:10,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401639905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:10,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:10,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:51:10,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066851934] [2024-06-21 20:51:10,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:10,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:51:10,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:10,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:51:10,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:51:10,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:51:10,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 614 transitions, 7622 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:10,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:10,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:51:10,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:12,012 INFO L124 PetriNetUnfolderBase]: 4177/6608 cut-off events. [2024-06-21 20:51:12,012 INFO L125 PetriNetUnfolderBase]: For 1453890/1453892 co-relation queries the response was YES. [2024-06-21 20:51:12,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67600 conditions, 6608 events. 4177/6608 cut-off events. For 1453890/1453892 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 40566 event pairs, 889 based on Foata normal form. 6/6611 useless extension candidates. Maximal degree in co-relation 67396. Up to 6079 conditions per place. [2024-06-21 20:51:12,136 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 540 selfloop transitions, 108 changer transitions 0/652 dead transitions. [2024-06-21 20:51:12,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 652 transitions, 9580 flow [2024-06-21 20:51:12,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:51:12,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:51:12,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 20:51:12,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-21 20:51:12,138 INFO L175 Difference]: Start difference. First operand has 439 places, 614 transitions, 7622 flow. Second operand 9 states and 163 transitions. [2024-06-21 20:51:12,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 652 transitions, 9580 flow [2024-06-21 20:51:18,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 652 transitions, 9512 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 20:51:18,551 INFO L231 Difference]: Finished difference. Result has 442 places, 626 transitions, 8090 flow [2024-06-21 20:51:18,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7554, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8090, PETRI_PLACES=442, PETRI_TRANSITIONS=626} [2024-06-21 20:51:18,551 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-21 20:51:18,552 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 626 transitions, 8090 flow [2024-06-21 20:51:18,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:18,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:18,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:18,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 20:51:18,552 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:51:18,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:18,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1483055269, now seen corresponding path program 2 times [2024-06-21 20:51:18,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:18,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287389180] [2024-06-21 20:51:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:18,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:19,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:19,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287389180] [2024-06-21 20:51:19,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287389180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:19,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:19,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:51:19,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646928914] [2024-06-21 20:51:19,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:19,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:51:19,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:19,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:51:19,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:51:19,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:51:19,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 626 transitions, 8090 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:19,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:19,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:51:19,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:21,127 INFO L124 PetriNetUnfolderBase]: 4219/6664 cut-off events. [2024-06-21 20:51:21,127 INFO L125 PetriNetUnfolderBase]: For 1504485/1504487 co-relation queries the response was YES. [2024-06-21 20:51:21,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70091 conditions, 6664 events. 4219/6664 cut-off events. For 1504485/1504487 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 40897 event pairs, 889 based on Foata normal form. 4/6665 useless extension candidates. Maximal degree in co-relation 69885. Up to 6071 conditions per place. [2024-06-21 20:51:21,254 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 541 selfloop transitions, 115 changer transitions 0/660 dead transitions. [2024-06-21 20:51:21,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 660 transitions, 10392 flow [2024-06-21 20:51:21,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:51:21,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:51:21,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:51:21,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:51:21,255 INFO L175 Difference]: Start difference. First operand has 442 places, 626 transitions, 8090 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:51:21,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 660 transitions, 10392 flow [2024-06-21 20:51:27,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 660 transitions, 10192 flow, removed 80 selfloop flow, removed 4 redundant places. [2024-06-21 20:51:27,366 INFO L231 Difference]: Finished difference. Result has 447 places, 635 transitions, 8460 flow [2024-06-21 20:51:27,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7898, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8460, PETRI_PLACES=447, PETRI_TRANSITIONS=635} [2024-06-21 20:51:27,367 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-21 20:51:27,367 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 635 transitions, 8460 flow [2024-06-21 20:51:27,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:27,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:27,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:27,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 20:51:27,367 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:51:27,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:27,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1839275677, now seen corresponding path program 3 times [2024-06-21 20:51:27,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:27,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411937329] [2024-06-21 20:51:27,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:27,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:28,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:28,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411937329] [2024-06-21 20:51:28,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411937329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:28,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:28,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:51:28,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793499162] [2024-06-21 20:51:28,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:28,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:51:28,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:28,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:51:28,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:51:28,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:51:28,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 635 transitions, 8460 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:28,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:28,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:51:28,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:29,999 INFO L124 PetriNetUnfolderBase]: 4213/6656 cut-off events. [2024-06-21 20:51:29,999 INFO L125 PetriNetUnfolderBase]: For 1509632/1509634 co-relation queries the response was YES. [2024-06-21 20:51:30,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69896 conditions, 6656 events. 4213/6656 cut-off events. For 1509632/1509634 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 40848 event pairs, 889 based on Foata normal form. 4/6657 useless extension candidates. Maximal degree in co-relation 69688. Up to 6066 conditions per place. [2024-06-21 20:51:30,118 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 542 selfloop transitions, 113 changer transitions 0/659 dead transitions. [2024-06-21 20:51:30,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 659 transitions, 10170 flow [2024-06-21 20:51:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:51:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:51:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:51:30,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:51:30,120 INFO L175 Difference]: Start difference. First operand has 447 places, 635 transitions, 8460 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:51:30,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 659 transitions, 10170 flow [2024-06-21 20:51:36,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 659 transitions, 9905 flow, removed 99 selfloop flow, removed 4 redundant places. [2024-06-21 20:51:36,400 INFO L231 Difference]: Finished difference. Result has 452 places, 635 transitions, 8427 flow [2024-06-21 20:51:36,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8195, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8427, PETRI_PLACES=452, PETRI_TRANSITIONS=635} [2024-06-21 20:51:36,401 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-21 20:51:36,401 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 635 transitions, 8427 flow [2024-06-21 20:51:36,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:36,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:36,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:36,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 20:51:36,401 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:51:36,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:36,402 INFO L85 PathProgramCache]: Analyzing trace with hash -105814110, now seen corresponding path program 3 times [2024-06-21 20:51:36,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:36,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50726185] [2024-06-21 20:51:36,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:36,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:37,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:37,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50726185] [2024-06-21 20:51:37,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50726185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:37,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:37,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:51:37,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409690384] [2024-06-21 20:51:37,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:37,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:51:37,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:37,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:51:37,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:51:37,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:51:37,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 635 transitions, 8427 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:37,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:37,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:51:37,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:39,080 INFO L124 PetriNetUnfolderBase]: 4218/6665 cut-off events. [2024-06-21 20:51:39,080 INFO L125 PetriNetUnfolderBase]: For 1519818/1519820 co-relation queries the response was YES. [2024-06-21 20:51:39,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70148 conditions, 6665 events. 4218/6665 cut-off events. For 1519818/1519820 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 40903 event pairs, 880 based on Foata normal form. 3/6665 useless extension candidates. Maximal degree in co-relation 69938. Up to 6357 conditions per place. [2024-06-21 20:51:39,201 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 617 selfloop transitions, 59 changer transitions 0/680 dead transitions. [2024-06-21 20:51:39,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 680 transitions, 10258 flow [2024-06-21 20:51:39,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:51:39,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:51:39,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 20:51:39,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-21 20:51:39,203 INFO L175 Difference]: Start difference. First operand has 452 places, 635 transitions, 8427 flow. Second operand 9 states and 152 transitions. [2024-06-21 20:51:39,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 680 transitions, 10258 flow [2024-06-21 20:51:46,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 680 transitions, 9986 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 20:51:46,656 INFO L231 Difference]: Finished difference. Result has 456 places, 657 transitions, 8698 flow [2024-06-21 20:51:46,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8172, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8698, PETRI_PLACES=456, PETRI_TRANSITIONS=657} [2024-06-21 20:51:46,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-21 20:51:46,657 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 657 transitions, 8698 flow [2024-06-21 20:51:46,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:46,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:46,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:46,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 20:51:46,657 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:51:46,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:46,657 INFO L85 PathProgramCache]: Analyzing trace with hash -279713951, now seen corresponding path program 4 times [2024-06-21 20:51:46,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:46,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018536895] [2024-06-21 20:51:46,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:46,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:47,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:47,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018536895] [2024-06-21 20:51:47,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018536895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:47,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:47,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:51:47,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632376560] [2024-06-21 20:51:47,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:47,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:51:47,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:47,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:51:47,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:51:47,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:51:47,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 657 transitions, 8698 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:47,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:47,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:51:47,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:49,401 INFO L124 PetriNetUnfolderBase]: 4228/6668 cut-off events. [2024-06-21 20:51:49,402 INFO L125 PetriNetUnfolderBase]: For 1543099/1543099 co-relation queries the response was YES. [2024-06-21 20:51:49,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70843 conditions, 6668 events. 4228/6668 cut-off events. For 1543099/1543099 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 40830 event pairs, 774 based on Foata normal form. 1/6666 useless extension candidates. Maximal degree in co-relation 70629. Up to 6350 conditions per place. [2024-06-21 20:51:49,521 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 594 selfloop transitions, 81 changer transitions 0/679 dead transitions. [2024-06-21 20:51:49,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 679 transitions, 10189 flow [2024-06-21 20:51:49,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:51:49,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:51:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 20:51:49,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-21 20:51:49,523 INFO L175 Difference]: Start difference. First operand has 456 places, 657 transitions, 8698 flow. Second operand 9 states and 151 transitions. [2024-06-21 20:51:49,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 679 transitions, 10189 flow [2024-06-21 20:51:56,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 679 transitions, 10030 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-21 20:51:56,899 INFO L231 Difference]: Finished difference. Result has 462 places, 663 transitions, 8806 flow [2024-06-21 20:51:56,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8539, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8806, PETRI_PLACES=462, PETRI_TRANSITIONS=663} [2024-06-21 20:51:56,900 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-21 20:51:56,900 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 663 transitions, 8806 flow [2024-06-21 20:51:56,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:56,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:56,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:56,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 20:51:56,900 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:51:56,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:56,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1259581795, now seen corresponding path program 4 times [2024-06-21 20:51:56,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:56,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784038484] [2024-06-21 20:51:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:56,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:57,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:57,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784038484] [2024-06-21 20:51:57,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784038484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:57,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:57,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:51:57,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632267994] [2024-06-21 20:51:57,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:57,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:51:57,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:57,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:51:57,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:51:57,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:51:57,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 663 transitions, 8806 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:57,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:57,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:51:57,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:59,643 INFO L124 PetriNetUnfolderBase]: 4254/6706 cut-off events. [2024-06-21 20:51:59,644 INFO L125 PetriNetUnfolderBase]: For 1592621/1592623 co-relation queries the response was YES. [2024-06-21 20:51:59,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71693 conditions, 6706 events. 4254/6706 cut-off events. For 1592621/1592623 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 41084 event pairs, 875 based on Foata normal form. 4/6707 useless extension candidates. Maximal degree in co-relation 71477. Up to 6358 conditions per place. [2024-06-21 20:51:59,753 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 609 selfloop transitions, 78 changer transitions 0/691 dead transitions. [2024-06-21 20:51:59,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 691 transitions, 10760 flow [2024-06-21 20:51:59,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:51:59,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:51:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 20:51:59,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-21 20:51:59,754 INFO L175 Difference]: Start difference. First operand has 462 places, 663 transitions, 8806 flow. Second operand 9 states and 155 transitions. [2024-06-21 20:51:59,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 691 transitions, 10760 flow [2024-06-21 20:52:06,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 691 transitions, 10492 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 20:52:06,508 INFO L231 Difference]: Finished difference. Result has 465 places, 669 transitions, 8887 flow [2024-06-21 20:52:06,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8538, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8887, PETRI_PLACES=465, PETRI_TRANSITIONS=669} [2024-06-21 20:52:06,508 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-21 20:52:06,508 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 669 transitions, 8887 flow [2024-06-21 20:52:06,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:06,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:06,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:06,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 20:52:06,509 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:52:06,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:06,509 INFO L85 PathProgramCache]: Analyzing trace with hash -286951180, now seen corresponding path program 4 times [2024-06-21 20:52:06,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:06,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599642539] [2024-06-21 20:52:06,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:06,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:07,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:07,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599642539] [2024-06-21 20:52:07,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599642539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:07,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:07,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:52:07,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391596191] [2024-06-21 20:52:07,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:07,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:52:07,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:07,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:52:07,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:52:07,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:52:07,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 669 transitions, 8887 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:07,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:07,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:52:07,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:09,340 INFO L124 PetriNetUnfolderBase]: 4259/6713 cut-off events. [2024-06-21 20:52:09,340 INFO L125 PetriNetUnfolderBase]: For 1604451/1604453 co-relation queries the response was YES. [2024-06-21 20:52:09,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71892 conditions, 6713 events. 4259/6713 cut-off events. For 1604451/1604453 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 41112 event pairs, 881 based on Foata normal form. 3/6713 useless extension candidates. Maximal degree in co-relation 71675. Up to 6479 conditions per place. [2024-06-21 20:52:09,463 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 646 selfloop transitions, 43 changer transitions 0/693 dead transitions. [2024-06-21 20:52:09,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 693 transitions, 10498 flow [2024-06-21 20:52:09,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:52:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:52:09,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 20:52:09,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-21 20:52:09,464 INFO L175 Difference]: Start difference. First operand has 465 places, 669 transitions, 8887 flow. Second operand 9 states and 146 transitions. [2024-06-21 20:52:09,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 693 transitions, 10498 flow [2024-06-21 20:52:17,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 693 transitions, 10332 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 20:52:17,271 INFO L231 Difference]: Finished difference. Result has 470 places, 677 transitions, 9022 flow [2024-06-21 20:52:17,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8724, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9022, PETRI_PLACES=470, PETRI_TRANSITIONS=677} [2024-06-21 20:52:17,272 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-21 20:52:17,272 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 677 transitions, 9022 flow [2024-06-21 20:52:17,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:17,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:17,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:17,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 20:52:17,273 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:52:17,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:17,273 INFO L85 PathProgramCache]: Analyzing trace with hash -279586138, now seen corresponding path program 2 times [2024-06-21 20:52:17,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:17,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33542320] [2024-06-21 20:52:17,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:17,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:18,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:18,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33542320] [2024-06-21 20:52:18,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33542320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:18,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:18,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:52:18,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568316921] [2024-06-21 20:52:18,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:18,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:52:18,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:18,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:52:18,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:52:18,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:52:18,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 677 transitions, 9022 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:18,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:18,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:52:18,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:20,000 INFO L124 PetriNetUnfolderBase]: 4279/6753 cut-off events. [2024-06-21 20:52:20,000 INFO L125 PetriNetUnfolderBase]: For 1657198/1657200 co-relation queries the response was YES. [2024-06-21 20:52:20,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72808 conditions, 6753 events. 4279/6753 cut-off events. For 1657198/1657200 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 41511 event pairs, 887 based on Foata normal form. 6/6756 useless extension candidates. Maximal degree in co-relation 72588. Up to 6475 conditions per place. [2024-06-21 20:52:20,131 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 639 selfloop transitions, 57 changer transitions 0/700 dead transitions. [2024-06-21 20:52:20,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 700 transitions, 10578 flow [2024-06-21 20:52:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:52:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:52:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 20:52:20,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-21 20:52:20,132 INFO L175 Difference]: Start difference. First operand has 470 places, 677 transitions, 9022 flow. Second operand 9 states and 152 transitions. [2024-06-21 20:52:20,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 700 transitions, 10578 flow [2024-06-21 20:52:28,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 700 transitions, 10441 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-21 20:52:28,042 INFO L231 Difference]: Finished difference. Result has 475 places, 682 transitions, 9099 flow [2024-06-21 20:52:28,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8885, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9099, PETRI_PLACES=475, PETRI_TRANSITIONS=682} [2024-06-21 20:52:28,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 433 predicate places. [2024-06-21 20:52:28,043 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 682 transitions, 9099 flow [2024-06-21 20:52:28,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:28,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:28,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:28,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 20:52:28,043 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:52:28,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:28,044 INFO L85 PathProgramCache]: Analyzing trace with hash -279593795, now seen corresponding path program 5 times [2024-06-21 20:52:28,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:28,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400269877] [2024-06-21 20:52:28,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:28,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:28,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:28,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400269877] [2024-06-21 20:52:28,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400269877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:28,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:28,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:52:28,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396147419] [2024-06-21 20:52:28,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:28,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:52:28,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:28,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:52:28,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:52:28,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:52:28,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 682 transitions, 9099 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:28,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:28,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:52:28,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:30,867 INFO L124 PetriNetUnfolderBase]: 4289/6767 cut-off events. [2024-06-21 20:52:30,867 INFO L125 PetriNetUnfolderBase]: For 1660775/1660777 co-relation queries the response was YES. [2024-06-21 20:52:30,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73205 conditions, 6767 events. 4289/6767 cut-off events. For 1660775/1660777 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 41618 event pairs, 884 based on Foata normal form. 4/6768 useless extension candidates. Maximal degree in co-relation 72983. Up to 6488 conditions per place. [2024-06-21 20:52:30,987 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 641 selfloop transitions, 58 changer transitions 0/703 dead transitions. [2024-06-21 20:52:30,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 703 transitions, 10675 flow [2024-06-21 20:52:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:52:30,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:52:30,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 20:52:30,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-21 20:52:30,988 INFO L175 Difference]: Start difference. First operand has 475 places, 682 transitions, 9099 flow. Second operand 9 states and 150 transitions. [2024-06-21 20:52:30,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 703 transitions, 10675 flow [2024-06-21 20:52:40,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 703 transitions, 10499 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 20:52:40,586 INFO L231 Difference]: Finished difference. Result has 478 places, 685 transitions, 9139 flow [2024-06-21 20:52:40,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8923, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9139, PETRI_PLACES=478, PETRI_TRANSITIONS=685} [2024-06-21 20:52:40,587 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-21 20:52:40,587 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 685 transitions, 9139 flow [2024-06-21 20:52:40,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:40,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:40,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:40,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 20:52:40,588 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:52:40,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:40,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1252224348, now seen corresponding path program 3 times [2024-06-21 20:52:40,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:40,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142241669] [2024-06-21 20:52:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:40,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:41,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:41,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142241669] [2024-06-21 20:52:41,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142241669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:41,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:41,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:52:41,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134989378] [2024-06-21 20:52:41,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:41,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:52:41,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:41,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:52:41,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:52:41,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:52:41,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 685 transitions, 9139 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:41,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:41,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:52:41,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:43,253 INFO L124 PetriNetUnfolderBase]: 4309/6795 cut-off events. [2024-06-21 20:52:43,254 INFO L125 PetriNetUnfolderBase]: For 1703178/1703180 co-relation queries the response was YES. [2024-06-21 20:52:43,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73535 conditions, 6795 events. 4309/6795 cut-off events. For 1703178/1703180 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 41741 event pairs, 887 based on Foata normal form. 6/6798 useless extension candidates. Maximal degree in co-relation 73312. Up to 6475 conditions per place. [2024-06-21 20:52:43,385 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 638 selfloop transitions, 66 changer transitions 0/708 dead transitions. [2024-06-21 20:52:43,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 708 transitions, 10727 flow [2024-06-21 20:52:43,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:52:43,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:52:43,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 20:52:43,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 20:52:43,386 INFO L175 Difference]: Start difference. First operand has 478 places, 685 transitions, 9139 flow. Second operand 9 states and 156 transitions. [2024-06-21 20:52:43,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 708 transitions, 10727 flow [2024-06-21 20:52:52,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 708 transitions, 10567 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 20:52:52,681 INFO L231 Difference]: Finished difference. Result has 481 places, 688 transitions, 9201 flow [2024-06-21 20:52:52,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8979, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9201, PETRI_PLACES=481, PETRI_TRANSITIONS=688} [2024-06-21 20:52:52,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-21 20:52:52,682 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 688 transitions, 9201 flow [2024-06-21 20:52:52,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:52,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:52,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:52,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 20:52:52,682 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:52:52,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:52,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1259576215, now seen corresponding path program 6 times [2024-06-21 20:52:52,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:52,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737482953] [2024-06-21 20:52:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:52,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:53,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:53,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737482953] [2024-06-21 20:52:53,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737482953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:53,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:53,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:52:53,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184035161] [2024-06-21 20:52:53,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:53,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:52:53,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:53,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:52:53,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:52:53,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:52:53,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 688 transitions, 9201 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:53,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:53,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:52:53,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:55,572 INFO L124 PetriNetUnfolderBase]: 4303/6791 cut-off events. [2024-06-21 20:52:55,572 INFO L125 PetriNetUnfolderBase]: For 1684860/1684862 co-relation queries the response was YES. [2024-06-21 20:52:55,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73321 conditions, 6791 events. 4303/6791 cut-off events. For 1684860/1684862 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 41769 event pairs, 885 based on Foata normal form. 4/6792 useless extension candidates. Maximal degree in co-relation 73097. Up to 6426 conditions per place. [2024-06-21 20:52:55,684 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 622 selfloop transitions, 81 changer transitions 0/707 dead transitions. [2024-06-21 20:52:55,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 707 transitions, 10721 flow [2024-06-21 20:52:55,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:52:55,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:52:55,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 20:52:55,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-21 20:52:55,685 INFO L175 Difference]: Start difference. First operand has 481 places, 688 transitions, 9201 flow. Second operand 9 states and 155 transitions. [2024-06-21 20:52:55,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 707 transitions, 10721 flow [2024-06-21 20:53:04,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 707 transitions, 10479 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-21 20:53:04,055 INFO L231 Difference]: Finished difference. Result has 483 places, 688 transitions, 9129 flow [2024-06-21 20:53:04,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8959, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9129, PETRI_PLACES=483, PETRI_TRANSITIONS=688} [2024-06-21 20:53:04,055 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-21 20:53:04,055 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 688 transitions, 9129 flow [2024-06-21 20:53:04,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:04,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:04,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:04,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 20:53:04,056 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:04,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:04,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1086808183, now seen corresponding path program 5 times [2024-06-21 20:53:04,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:04,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652379000] [2024-06-21 20:53:04,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:04,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:04,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:04,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652379000] [2024-06-21 20:53:04,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652379000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:04,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:04,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:04,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257667882] [2024-06-21 20:53:04,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:04,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:04,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:04,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:04,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:05,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:05,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 688 transitions, 9129 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:05,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:05,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:05,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:06,920 INFO L124 PetriNetUnfolderBase]: 4333/6824 cut-off events. [2024-06-21 20:53:06,921 INFO L125 PetriNetUnfolderBase]: For 1695213/1695213 co-relation queries the response was YES. [2024-06-21 20:53:07,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73595 conditions, 6824 events. 4333/6824 cut-off events. For 1695213/1695213 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 41825 event pairs, 794 based on Foata normal form. 1/6816 useless extension candidates. Maximal degree in co-relation 73370. Up to 6488 conditions per place. [2024-06-21 20:53:07,059 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 627 selfloop transitions, 89 changer transitions 0/720 dead transitions. [2024-06-21 20:53:07,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 720 transitions, 10825 flow [2024-06-21 20:53:07,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:53:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:53:07,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-21 20:53:07,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 20:53:07,061 INFO L175 Difference]: Start difference. First operand has 483 places, 688 transitions, 9129 flow. Second operand 10 states and 164 transitions. [2024-06-21 20:53:07,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 720 transitions, 10825 flow [2024-06-21 20:53:15,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 720 transitions, 10624 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 20:53:15,684 INFO L231 Difference]: Finished difference. Result has 485 places, 705 transitions, 9343 flow [2024-06-21 20:53:15,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8928, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9343, PETRI_PLACES=485, PETRI_TRANSITIONS=705} [2024-06-21 20:53:15,685 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-21 20:53:15,685 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 705 transitions, 9343 flow [2024-06-21 20:53:15,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:15,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:15,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:15,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 20:53:15,685 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:15,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:15,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1090301666, now seen corresponding path program 4 times [2024-06-21 20:53:15,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:15,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782837928] [2024-06-21 20:53:15,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:15,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:16,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:16,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782837928] [2024-06-21 20:53:16,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782837928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:16,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:16,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:53:16,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382640688] [2024-06-21 20:53:16,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:16,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:53:16,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:16,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:53:16,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:53:16,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:16,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 705 transitions, 9343 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:16,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:16,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:16,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:18,518 INFO L124 PetriNetUnfolderBase]: 4353/6861 cut-off events. [2024-06-21 20:53:18,519 INFO L125 PetriNetUnfolderBase]: For 1748788/1748790 co-relation queries the response was YES. [2024-06-21 20:53:18,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74032 conditions, 6861 events. 4353/6861 cut-off events. For 1748788/1748790 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 42144 event pairs, 888 based on Foata normal form. 6/6864 useless extension candidates. Maximal degree in co-relation 73805. Up to 6471 conditions per place. [2024-06-21 20:53:18,645 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 638 selfloop transitions, 87 changer transitions 0/729 dead transitions. [2024-06-21 20:53:18,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 729 transitions, 11001 flow [2024-06-21 20:53:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 20:53:18,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 20:53:18,646 INFO L175 Difference]: Start difference. First operand has 485 places, 705 transitions, 9343 flow. Second operand 9 states and 159 transitions. [2024-06-21 20:53:18,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 729 transitions, 11001 flow [2024-06-21 20:53:28,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 729 transitions, 10832 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 20:53:28,742 INFO L231 Difference]: Finished difference. Result has 490 places, 708 transitions, 9444 flow [2024-06-21 20:53:28,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9174, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9444, PETRI_PLACES=490, PETRI_TRANSITIONS=708} [2024-06-21 20:53:28,742 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-21 20:53:28,743 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 708 transitions, 9444 flow [2024-06-21 20:53:28,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:28,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:28,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:28,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 20:53:28,743 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:28,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:28,743 INFO L85 PathProgramCache]: Analyzing trace with hash 117134775, now seen corresponding path program 6 times [2024-06-21 20:53:28,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:28,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037776168] [2024-06-21 20:53:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:28,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:28,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:29,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:29,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037776168] [2024-06-21 20:53:29,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037776168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:29,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:29,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:29,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047526488] [2024-06-21 20:53:29,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:29,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:29,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:29,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:29,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:29,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:29,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 708 transitions, 9444 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:29,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:29,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:29,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:31,719 INFO L124 PetriNetUnfolderBase]: 4366/6871 cut-off events. [2024-06-21 20:53:31,719 INFO L125 PetriNetUnfolderBase]: For 1751864/1751864 co-relation queries the response was YES. [2024-06-21 20:53:31,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74584 conditions, 6871 events. 4366/6871 cut-off events. For 1751864/1751864 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 42151 event pairs, 783 based on Foata normal form. 1/6869 useless extension candidates. Maximal degree in co-relation 74356. Up to 6517 conditions per place. [2024-06-21 20:53:31,853 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 623 selfloop transitions, 104 changer transitions 0/731 dead transitions. [2024-06-21 20:53:31,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 731 transitions, 11396 flow [2024-06-21 20:53:31,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:31,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:31,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 20:53:31,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-21 20:53:31,855 INFO L175 Difference]: Start difference. First operand has 490 places, 708 transitions, 9444 flow. Second operand 9 states and 154 transitions. [2024-06-21 20:53:31,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 731 transitions, 11396 flow [2024-06-21 20:53:41,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 731 transitions, 11164 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 20:53:41,948 INFO L231 Difference]: Finished difference. Result has 492 places, 714 transitions, 9592 flow [2024-06-21 20:53:41,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9212, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9592, PETRI_PLACES=492, PETRI_TRANSITIONS=714} [2024-06-21 20:53:41,949 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-21 20:53:41,949 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 714 transitions, 9592 flow [2024-06-21 20:53:41,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:41,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:41,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:41,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 20:53:41,950 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:41,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:41,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1263306817, now seen corresponding path program 4 times [2024-06-21 20:53:41,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:41,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871306961] [2024-06-21 20:53:41,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:41,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:42,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:42,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871306961] [2024-06-21 20:53:42,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871306961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:42,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:42,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:42,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897140206] [2024-06-21 20:53:42,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:42,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:42,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:42,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:42,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:42,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:42,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 714 transitions, 9592 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:42,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:42,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:42,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:45,098 INFO L124 PetriNetUnfolderBase]: 4371/6874 cut-off events. [2024-06-21 20:53:45,098 INFO L125 PetriNetUnfolderBase]: For 1773433/1773433 co-relation queries the response was YES. [2024-06-21 20:53:45,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74708 conditions, 6874 events. 4371/6874 cut-off events. For 1773433/1773433 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 42071 event pairs, 782 based on Foata normal form. 1/6872 useless extension candidates. Maximal degree in co-relation 74479. Up to 6582 conditions per place. [2024-06-21 20:53:45,240 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 665 selfloop transitions, 64 changer transitions 0/733 dead transitions. [2024-06-21 20:53:45,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 733 transitions, 11192 flow [2024-06-21 20:53:45,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:45,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:45,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 20:53:45,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-21 20:53:45,242 INFO L175 Difference]: Start difference. First operand has 492 places, 714 transitions, 9592 flow. Second operand 9 states and 148 transitions. [2024-06-21 20:53:45,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 733 transitions, 11192 flow [2024-06-21 20:53:54,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 733 transitions, 11037 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 20:53:54,098 INFO L231 Difference]: Finished difference. Result has 497 places, 717 transitions, 9671 flow [2024-06-21 20:53:54,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9437, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9671, PETRI_PLACES=497, PETRI_TRANSITIONS=717} [2024-06-21 20:53:54,099 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-21 20:53:54,099 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 717 transitions, 9671 flow [2024-06-21 20:53:54,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:54,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:54,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:54,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 20:53:54,100 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:54,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:54,100 INFO L85 PathProgramCache]: Analyzing trace with hash -860038035, now seen corresponding path program 1 times [2024-06-21 20:53:54,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:54,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451103700] [2024-06-21 20:53:54,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:54,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:54,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:55,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:55,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451103700] [2024-06-21 20:53:55,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451103700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:55,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:55,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:55,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663629852] [2024-06-21 20:53:55,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:55,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:55,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:55,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:55,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:55,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:55,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 717 transitions, 9671 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:55,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:55,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:55,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:57,263 INFO L124 PetriNetUnfolderBase]: 4379/6902 cut-off events. [2024-06-21 20:53:57,263 INFO L125 PetriNetUnfolderBase]: For 1807528/1807530 co-relation queries the response was YES. [2024-06-21 20:53:57,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75057 conditions, 6902 events. 4379/6902 cut-off events. For 1807528/1807530 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 42399 event pairs, 754 based on Foata normal form. 4/6903 useless extension candidates. Maximal degree in co-relation 74826. Up to 6432 conditions per place. [2024-06-21 20:53:57,400 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 647 selfloop transitions, 98 changer transitions 0/749 dead transitions. [2024-06-21 20:53:57,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 749 transitions, 11615 flow [2024-06-21 20:53:57,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:57,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:57,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:53:57,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:53:57,402 INFO L175 Difference]: Start difference. First operand has 497 places, 717 transitions, 9671 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:53:57,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 749 transitions, 11615 flow [2024-06-21 20:54:06,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 749 transitions, 11409 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-21 20:54:06,732 INFO L231 Difference]: Finished difference. Result has 499 places, 721 transitions, 9746 flow [2024-06-21 20:54:06,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9465, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9746, PETRI_PLACES=499, PETRI_TRANSITIONS=721} [2024-06-21 20:54:06,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-21 20:54:06,733 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 721 transitions, 9746 flow [2024-06-21 20:54:06,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:06,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:06,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:06,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 20:54:06,733 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:06,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:06,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1566645095, now seen corresponding path program 2 times [2024-06-21 20:54:06,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:06,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621160347] [2024-06-21 20:54:06,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:06,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:07,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:07,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621160347] [2024-06-21 20:54:07,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621160347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:07,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:07,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:54:07,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595145231] [2024-06-21 20:54:07,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:07,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:54:07,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:07,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:54:07,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:54:07,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:07,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 721 transitions, 9746 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:07,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:07,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:07,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:10,080 INFO L124 PetriNetUnfolderBase]: 4387/6908 cut-off events. [2024-06-21 20:54:10,081 INFO L125 PetriNetUnfolderBase]: For 1829831/1829833 co-relation queries the response was YES. [2024-06-21 20:54:10,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75462 conditions, 6908 events. 4387/6908 cut-off events. For 1829831/1829833 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 42493 event pairs, 885 based on Foata normal form. 4/6909 useless extension candidates. Maximal degree in co-relation 75230. Up to 6560 conditions per place. [2024-06-21 20:54:10,217 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 645 selfloop transitions, 96 changer transitions 0/745 dead transitions. [2024-06-21 20:54:10,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 745 transitions, 11338 flow [2024-06-21 20:54:10,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:54:10,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:54:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 20:54:10,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 20:54:10,218 INFO L175 Difference]: Start difference. First operand has 499 places, 721 transitions, 9746 flow. Second operand 9 states and 156 transitions. [2024-06-21 20:54:10,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 745 transitions, 11338 flow [2024-06-21 20:54:19,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 745 transitions, 11168 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 20:54:19,746 INFO L231 Difference]: Finished difference. Result has 503 places, 723 transitions, 9820 flow [2024-06-21 20:54:19,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9590, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9820, PETRI_PLACES=503, PETRI_TRANSITIONS=723} [2024-06-21 20:54:19,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 461 predicate places. [2024-06-21 20:54:19,747 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 723 transitions, 9820 flow [2024-06-21 20:54:19,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:19,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:19,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:19,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 20:54:19,748 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:19,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:19,748 INFO L85 PathProgramCache]: Analyzing trace with hash 47303017, now seen corresponding path program 3 times [2024-06-21 20:54:19,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:19,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213859212] [2024-06-21 20:54:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:19,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:20,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:20,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213859212] [2024-06-21 20:54:20,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213859212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:20,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:20,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:54:20,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298578928] [2024-06-21 20:54:20,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:20,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:54:20,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:20,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:54:20,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:54:21,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:21,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 723 transitions, 9820 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:21,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:21,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:21,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:23,139 INFO L124 PetriNetUnfolderBase]: 4395/6920 cut-off events. [2024-06-21 20:54:23,139 INFO L125 PetriNetUnfolderBase]: For 1853090/1853092 co-relation queries the response was YES. [2024-06-21 20:54:23,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75774 conditions, 6920 events. 4395/6920 cut-off events. For 1853090/1853092 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 42523 event pairs, 883 based on Foata normal form. 4/6921 useless extension candidates. Maximal degree in co-relation 75540. Up to 6556 conditions per place. [2024-06-21 20:54:23,280 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 645 selfloop transitions, 99 changer transitions 0/748 dead transitions. [2024-06-21 20:54:23,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 748 transitions, 11410 flow [2024-06-21 20:54:23,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:54:23,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:54:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 20:54:23,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-21 20:54:23,281 INFO L175 Difference]: Start difference. First operand has 503 places, 723 transitions, 9820 flow. Second operand 9 states and 158 transitions. [2024-06-21 20:54:23,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 748 transitions, 11410 flow [2024-06-21 20:54:31,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 748 transitions, 11202 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 20:54:31,858 INFO L231 Difference]: Finished difference. Result has 505 places, 725 transitions, 9851 flow [2024-06-21 20:54:31,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9612, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9851, PETRI_PLACES=505, PETRI_TRANSITIONS=725} [2024-06-21 20:54:31,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 463 predicate places. [2024-06-21 20:54:31,859 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 725 transitions, 9851 flow [2024-06-21 20:54:31,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:31,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:31,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:31,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 20:54:31,859 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:31,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:31,860 INFO L85 PathProgramCache]: Analyzing trace with hash -290758817, now seen corresponding path program 4 times [2024-06-21 20:54:31,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:31,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44788199] [2024-06-21 20:54:31,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:31,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:32,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:32,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44788199] [2024-06-21 20:54:32,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44788199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:32,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:32,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:54:32,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27135912] [2024-06-21 20:54:32,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:32,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:54:32,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:32,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:54:32,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:54:33,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:33,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 725 transitions, 9851 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:33,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:33,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:33,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:35,147 INFO L124 PetriNetUnfolderBase]: 4403/6928 cut-off events. [2024-06-21 20:54:35,147 INFO L125 PetriNetUnfolderBase]: For 1875399/1875399 co-relation queries the response was YES. [2024-06-21 20:54:35,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76010 conditions, 6928 events. 4403/6928 cut-off events. For 1875399/1875399 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 42511 event pairs, 781 based on Foata normal form. 2/6927 useless extension candidates. Maximal degree in co-relation 75775. Up to 6584 conditions per place. [2024-06-21 20:54:35,293 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 647 selfloop transitions, 93 changer transitions 0/744 dead transitions. [2024-06-21 20:54:35,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 744 transitions, 11417 flow [2024-06-21 20:54:35,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:54:35,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:54:35,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 20:54:35,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-21 20:54:35,294 INFO L175 Difference]: Start difference. First operand has 505 places, 725 transitions, 9851 flow. Second operand 9 states and 152 transitions. [2024-06-21 20:54:35,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 744 transitions, 11417 flow [2024-06-21 20:54:44,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 744 transitions, 11198 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 20:54:44,429 INFO L231 Difference]: Finished difference. Result has 507 places, 727 transitions, 9864 flow [2024-06-21 20:54:44,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9632, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9864, PETRI_PLACES=507, PETRI_TRANSITIONS=727} [2024-06-21 20:54:44,430 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-21 20:54:44,430 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 727 transitions, 9864 flow [2024-06-21 20:54:44,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:44,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:44,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:44,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 20:54:44,430 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:44,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:44,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1252347697, now seen corresponding path program 5 times [2024-06-21 20:54:44,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:44,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950702834] [2024-06-21 20:54:44,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:44,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:45,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:45,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950702834] [2024-06-21 20:54:45,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950702834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:45,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:45,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:54:45,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437384507] [2024-06-21 20:54:45,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:45,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:54:45,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:45,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:54:45,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:54:45,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:45,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 727 transitions, 9864 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:45,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:45,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:45,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:48,331 INFO L124 PetriNetUnfolderBase]: 4411/6934 cut-off events. [2024-06-21 20:54:48,332 INFO L125 PetriNetUnfolderBase]: For 1898959/1898959 co-relation queries the response was YES. [2024-06-21 20:54:48,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76203 conditions, 6934 events. 4411/6934 cut-off events. For 1898959/1898959 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 42527 event pairs, 785 based on Foata normal form. 2/6933 useless extension candidates. Maximal degree in co-relation 75967. Up to 6596 conditions per place. [2024-06-21 20:54:48,535 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 648 selfloop transitions, 94 changer transitions 0/746 dead transitions. [2024-06-21 20:54:48,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 746 transitions, 11438 flow [2024-06-21 20:54:48,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:54:48,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:54:48,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 20:54:48,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-21 20:54:48,536 INFO L175 Difference]: Start difference. First operand has 507 places, 727 transitions, 9864 flow. Second operand 9 states and 151 transitions. [2024-06-21 20:54:48,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 746 transitions, 11438 flow [2024-06-21 20:54:58,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 746 transitions, 11187 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 20:54:58,723 INFO L231 Difference]: Finished difference. Result has 508 places, 729 transitions, 9851 flow [2024-06-21 20:54:58,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9613, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9851, PETRI_PLACES=508, PETRI_TRANSITIONS=729} [2024-06-21 20:54:58,724 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 466 predicate places. [2024-06-21 20:54:58,724 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 729 transitions, 9851 flow [2024-06-21 20:54:58,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:58,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:58,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:58,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 20:54:58,725 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:58,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:58,725 INFO L85 PathProgramCache]: Analyzing trace with hash -842556395, now seen corresponding path program 6 times [2024-06-21 20:54:58,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:58,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874957623] [2024-06-21 20:54:58,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:58,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:59,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:59,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874957623] [2024-06-21 20:54:59,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874957623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:59,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:59,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:54:59,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465418180] [2024-06-21 20:54:59,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:59,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:54:59,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:59,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:54:59,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:54:59,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:59,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 729 transitions, 9851 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:59,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:59,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:59,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:02,323 INFO L124 PetriNetUnfolderBase]: 4419/6950 cut-off events. [2024-06-21 20:55:02,324 INFO L125 PetriNetUnfolderBase]: For 1922263/1922263 co-relation queries the response was YES. [2024-06-21 20:55:02,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76417 conditions, 6950 events. 4419/6950 cut-off events. For 1922263/1922263 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 42669 event pairs, 783 based on Foata normal form. 2/6949 useless extension candidates. Maximal degree in co-relation 76180. Up to 6584 conditions per place. [2024-06-21 20:55:02,547 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 648 selfloop transitions, 97 changer transitions 0/749 dead transitions. [2024-06-21 20:55:02,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 749 transitions, 11437 flow [2024-06-21 20:55:02,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:55:02,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:55:02,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 20:55:02,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 20:55:02,549 INFO L175 Difference]: Start difference. First operand has 508 places, 729 transitions, 9851 flow. Second operand 9 states and 153 transitions. [2024-06-21 20:55:02,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 749 transitions, 11437 flow [2024-06-21 20:55:10,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 749 transitions, 11221 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 20:55:10,966 INFO L231 Difference]: Finished difference. Result has 510 places, 731 transitions, 9882 flow [2024-06-21 20:55:10,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9635, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9882, PETRI_PLACES=510, PETRI_TRANSITIONS=731} [2024-06-21 20:55:10,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-21 20:55:10,967 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 731 transitions, 9882 flow [2024-06-21 20:55:10,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:10,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:10,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:10,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 20:55:10,967 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:10,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:10,968 INFO L85 PathProgramCache]: Analyzing trace with hash -279316748, now seen corresponding path program 1 times [2024-06-21 20:55:10,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:10,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393848497] [2024-06-21 20:55:10,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:10,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:11,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:11,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393848497] [2024-06-21 20:55:11,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393848497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:11,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:11,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:55:11,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603040743] [2024-06-21 20:55:11,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:11,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:55:11,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:11,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:55:11,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:55:12,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:55:12,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 731 transitions, 9882 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:12,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:12,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:55:12,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:14,681 INFO L124 PetriNetUnfolderBase]: 4463/7020 cut-off events. [2024-06-21 20:55:14,681 INFO L125 PetriNetUnfolderBase]: For 2061890/2061890 co-relation queries the response was YES. [2024-06-21 20:55:14,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77151 conditions, 7020 events. 4463/7020 cut-off events. For 2061890/2061890 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 43164 event pairs, 789 based on Foata normal form. 12/7029 useless extension candidates. Maximal degree in co-relation 76913. Up to 6548 conditions per place. [2024-06-21 20:55:14,820 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 648 selfloop transitions, 106 changer transitions 0/758 dead transitions. [2024-06-21 20:55:14,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 758 transitions, 11630 flow [2024-06-21 20:55:14,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:55:14,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:55:14,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 20:55:14,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-21 20:55:14,822 INFO L175 Difference]: Start difference. First operand has 510 places, 731 transitions, 9882 flow. Second operand 9 states and 161 transitions. [2024-06-21 20:55:14,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 758 transitions, 11630 flow [2024-06-21 20:55:25,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 758 transitions, 11403 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 20:55:25,778 INFO L231 Difference]: Finished difference. Result has 512 places, 732 transitions, 9898 flow [2024-06-21 20:55:25,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9655, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9898, PETRI_PLACES=512, PETRI_TRANSITIONS=732} [2024-06-21 20:55:25,779 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 470 predicate places. [2024-06-21 20:55:25,779 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 732 transitions, 9898 flow [2024-06-21 20:55:25,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:25,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:25,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:25,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 20:55:25,779 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:25,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:25,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1218402548, now seen corresponding path program 5 times [2024-06-21 20:55:25,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:25,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018264443] [2024-06-21 20:55:25,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:25,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:26,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:26,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018264443] [2024-06-21 20:55:26,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018264443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:26,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:26,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:55:26,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288196338] [2024-06-21 20:55:26,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:26,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:55:26,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:26,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:55:26,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:55:26,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:55:26,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 732 transitions, 9898 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:26,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:26,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:55:26,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:29,229 INFO L124 PetriNetUnfolderBase]: 4476/7042 cut-off events. [2024-06-21 20:55:29,230 INFO L125 PetriNetUnfolderBase]: For 1975058/1975064 co-relation queries the response was YES. [2024-06-21 20:55:29,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77795 conditions, 7042 events. 4476/7042 cut-off events. For 1975058/1975064 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 43363 event pairs, 903 based on Foata normal form. 5/7039 useless extension candidates. Maximal degree in co-relation 77556. Up to 6724 conditions per place. [2024-06-21 20:55:29,356 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 719 selfloop transitions, 47 changer transitions 0/770 dead transitions. [2024-06-21 20:55:29,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 770 transitions, 12089 flow [2024-06-21 20:55:29,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:55:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:55:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 20:55:29,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121951219512195 [2024-06-21 20:55:29,357 INFO L175 Difference]: Start difference. First operand has 512 places, 732 transitions, 9898 flow. Second operand 10 states and 169 transitions. [2024-06-21 20:55:29,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 770 transitions, 12089 flow [2024-06-21 20:55:40,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 770 transitions, 11868 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 20:55:40,730 INFO L231 Difference]: Finished difference. Result has 518 places, 745 transitions, 10084 flow [2024-06-21 20:55:40,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9677, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10084, PETRI_PLACES=518, PETRI_TRANSITIONS=745} [2024-06-21 20:55:40,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 476 predicate places. [2024-06-21 20:55:40,731 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 745 transitions, 10084 flow [2024-06-21 20:55:40,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:40,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:40,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:40,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 20:55:40,731 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:40,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:40,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1615990066, now seen corresponding path program 6 times [2024-06-21 20:55:40,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:40,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722063188] [2024-06-21 20:55:40,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:40,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:41,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:41,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722063188] [2024-06-21 20:55:41,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722063188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:41,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:41,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:41,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209384996] [2024-06-21 20:55:41,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:41,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:41,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:41,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:41,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:41,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:55:41,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 745 transitions, 10084 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:41,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:41,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:55:41,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:44,469 INFO L124 PetriNetUnfolderBase]: 4473/7043 cut-off events. [2024-06-21 20:55:44,469 INFO L125 PetriNetUnfolderBase]: For 1992090/1992096 co-relation queries the response was YES. [2024-06-21 20:55:44,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78056 conditions, 7043 events. 4473/7043 cut-off events. For 1992090/1992096 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 43456 event pairs, 897 based on Foata normal form. 5/7040 useless extension candidates. Maximal degree in co-relation 77813. Up to 6733 conditions per place. [2024-06-21 20:55:44,598 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 720 selfloop transitions, 41 changer transitions 0/765 dead transitions. [2024-06-21 20:55:44,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 765 transitions, 11672 flow [2024-06-21 20:55:44,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:55:44,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:55:44,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 20:55:44,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-21 20:55:44,599 INFO L175 Difference]: Start difference. First operand has 518 places, 745 transitions, 10084 flow. Second operand 9 states and 151 transitions. [2024-06-21 20:55:44,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 765 transitions, 11672 flow [2024-06-21 20:55:55,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 765 transitions, 11421 flow, removed 105 selfloop flow, removed 4 redundant places. [2024-06-21 20:55:55,911 INFO L231 Difference]: Finished difference. Result has 523 places, 745 transitions, 9921 flow [2024-06-21 20:55:55,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9833, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=704, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9921, PETRI_PLACES=523, PETRI_TRANSITIONS=745} [2024-06-21 20:55:55,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 481 predicate places. [2024-06-21 20:55:55,912 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 745 transitions, 9921 flow [2024-06-21 20:55:55,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:55,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:55,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:55,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 20:55:55,912 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:55,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:55,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1018512149, now seen corresponding path program 7 times [2024-06-21 20:55:55,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:55,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791879413] [2024-06-21 20:55:55,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:55,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:56,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:56,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791879413] [2024-06-21 20:55:56,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791879413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:56,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:56,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:56,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789529265] [2024-06-21 20:55:56,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:56,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:56,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:56,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:56,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:56,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:55:56,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 745 transitions, 9921 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:56,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:56,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:55:56,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:59,462 INFO L124 PetriNetUnfolderBase]: 4483/7062 cut-off events. [2024-06-21 20:55:59,463 INFO L125 PetriNetUnfolderBase]: For 2027620/2027626 co-relation queries the response was YES. [2024-06-21 20:55:59,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78336 conditions, 7062 events. 4483/7062 cut-off events. For 2027620/2027626 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 43615 event pairs, 897 based on Foata normal form. 6/7060 useless extension candidates. Maximal degree in co-relation 78091. Up to 6660 conditions per place. [2024-06-21 20:55:59,592 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 709 selfloop transitions, 56 changer transitions 0/769 dead transitions. [2024-06-21 20:55:59,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 769 transitions, 11655 flow [2024-06-21 20:55:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:55:59,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:55:59,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 20:55:59,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 20:55:59,593 INFO L175 Difference]: Start difference. First operand has 523 places, 745 transitions, 9921 flow. Second operand 9 states and 156 transitions. [2024-06-21 20:55:59,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 769 transitions, 11655 flow [2024-06-21 20:56:10,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 769 transitions, 11563 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 20:56:10,865 INFO L231 Difference]: Finished difference. Result has 525 places, 748 transitions, 10068 flow [2024-06-21 20:56:10,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9829, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10068, PETRI_PLACES=525, PETRI_TRANSITIONS=748} [2024-06-21 20:56:10,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 483 predicate places. [2024-06-21 20:56:10,867 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 748 transitions, 10068 flow [2024-06-21 20:56:10,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:10,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:10,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:10,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 20:56:10,868 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:10,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:10,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1022237016, now seen corresponding path program 5 times [2024-06-21 20:56:10,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:10,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449383425] [2024-06-21 20:56:10,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:10,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:11,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:11,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449383425] [2024-06-21 20:56:11,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449383425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:11,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:11,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:56:11,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459454326] [2024-06-21 20:56:11,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:11,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:56:11,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:11,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:56:11,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:56:11,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:56:11,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 748 transitions, 10068 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:11,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:11,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:56:11,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:14,221 INFO L124 PetriNetUnfolderBase]: 4527/7115 cut-off events. [2024-06-21 20:56:14,221 INFO L125 PetriNetUnfolderBase]: For 2122930/2122936 co-relation queries the response was YES. [2024-06-21 20:56:14,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80264 conditions, 7115 events. 4527/7115 cut-off events. For 2122930/2122936 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 43890 event pairs, 906 based on Foata normal form. 8/7115 useless extension candidates. Maximal degree in co-relation 80018. Up to 6343 conditions per place. [2024-06-21 20:56:14,359 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 613 selfloop transitions, 165 changer transitions 0/782 dead transitions. [2024-06-21 20:56:14,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 782 transitions, 12691 flow [2024-06-21 20:56:14,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:56:14,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:56:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 20:56:14,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-21 20:56:14,361 INFO L175 Difference]: Start difference. First operand has 525 places, 748 transitions, 10068 flow. Second operand 10 states and 176 transitions. [2024-06-21 20:56:14,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 782 transitions, 12691 flow [2024-06-21 20:56:26,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 782 transitions, 12482 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-21 20:56:26,467 INFO L231 Difference]: Finished difference. Result has 528 places, 754 transitions, 10437 flow [2024-06-21 20:56:26,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9859, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10437, PETRI_PLACES=528, PETRI_TRANSITIONS=754} [2024-06-21 20:56:26,467 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 486 predicate places. [2024-06-21 20:56:26,467 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 754 transitions, 10437 flow [2024-06-21 20:56:26,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:26,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:26,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:26,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 20:56:26,468 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:26,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:26,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1022236799, now seen corresponding path program 8 times [2024-06-21 20:56:26,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:26,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766039103] [2024-06-21 20:56:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:26,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:27,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:27,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766039103] [2024-06-21 20:56:27,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766039103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:27,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:27,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:27,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872745139] [2024-06-21 20:56:27,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:27,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:27,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:27,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:27,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:27,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:56:27,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 754 transitions, 10437 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:27,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:27,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:56:27,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:29,816 INFO L124 PetriNetUnfolderBase]: 4561/7160 cut-off events. [2024-06-21 20:56:29,817 INFO L125 PetriNetUnfolderBase]: For 2172134/2172140 co-relation queries the response was YES. [2024-06-21 20:56:29,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82234 conditions, 7160 events. 4561/7160 cut-off events. For 2172134/2172140 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 44117 event pairs, 895 based on Foata normal form. 6/7158 useless extension candidates. Maximal degree in co-relation 81987. Up to 6222 conditions per place. [2024-06-21 20:56:29,946 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 598 selfloop transitions, 199 changer transitions 0/801 dead transitions. [2024-06-21 20:56:29,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 801 transitions, 13624 flow [2024-06-21 20:56:29,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:56:29,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:56:29,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 20:56:29,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:56:29,948 INFO L175 Difference]: Start difference. First operand has 528 places, 754 transitions, 10437 flow. Second operand 9 states and 164 transitions. [2024-06-21 20:56:29,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 801 transitions, 13624 flow [2024-06-21 20:56:40,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 801 transitions, 13341 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-21 20:56:40,593 INFO L231 Difference]: Finished difference. Result has 533 places, 776 transitions, 11174 flow [2024-06-21 20:56:40,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10154, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11174, PETRI_PLACES=533, PETRI_TRANSITIONS=776} [2024-06-21 20:56:40,594 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 491 predicate places. [2024-06-21 20:56:40,594 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 776 transitions, 11174 flow [2024-06-21 20:56:40,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:40,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:40,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:40,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 20:56:40,594 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:40,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:40,595 INFO L85 PathProgramCache]: Analyzing trace with hash -50095884, now seen corresponding path program 7 times [2024-06-21 20:56:40,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:40,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774923369] [2024-06-21 20:56:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:40,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:41,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:41,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774923369] [2024-06-21 20:56:41,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774923369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:41,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:41,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:56:41,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300540969] [2024-06-21 20:56:41,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:41,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:56:41,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:41,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:56:41,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:56:41,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:56:41,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 776 transitions, 11174 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:41,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:41,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:56:41,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:44,028 INFO L124 PetriNetUnfolderBase]: 4582/7191 cut-off events. [2024-06-21 20:56:44,028 INFO L125 PetriNetUnfolderBase]: For 2215317/2215323 co-relation queries the response was YES. [2024-06-21 20:56:44,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83934 conditions, 7191 events. 4582/7191 cut-off events. For 2215317/2215323 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 44266 event pairs, 900 based on Foata normal form. 5/7188 useless extension candidates. Maximal degree in co-relation 83684. Up to 6795 conditions per place. [2024-06-21 20:56:44,340 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 726 selfloop transitions, 88 changer transitions 0/818 dead transitions. [2024-06-21 20:56:44,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 818 transitions, 13921 flow [2024-06-21 20:56:44,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:56:44,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:56:44,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 20:56:44,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-21 20:56:44,342 INFO L175 Difference]: Start difference. First operand has 533 places, 776 transitions, 11174 flow. Second operand 10 states and 172 transitions. [2024-06-21 20:56:44,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 818 transitions, 13921 flow [2024-06-21 20:56:56,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 818 transitions, 13669 flow, removed 97 selfloop flow, removed 3 redundant places. [2024-06-21 20:56:56,916 INFO L231 Difference]: Finished difference. Result has 542 places, 791 transitions, 11569 flow [2024-06-21 20:56:56,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10924, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11569, PETRI_PLACES=542, PETRI_TRANSITIONS=791} [2024-06-21 20:56:56,917 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 500 predicate places. [2024-06-21 20:56:56,917 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 791 transitions, 11569 flow [2024-06-21 20:56:56,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:56,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:56,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:56,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 20:56:56,918 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:56:56,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:56,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1222211983, now seen corresponding path program 9 times [2024-06-21 20:56:56,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:56,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51604955] [2024-06-21 20:56:56,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:56,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:57,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:57,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51604955] [2024-06-21 20:56:57,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51604955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:57,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:57,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:57,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674611908] [2024-06-21 20:56:57,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:57,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:57,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:57,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:57,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:57,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:56:57,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 791 transitions, 11569 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:57,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:57,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:56:57,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:00,461 INFO L124 PetriNetUnfolderBase]: 4592/7211 cut-off events. [2024-06-21 20:57:00,461 INFO L125 PetriNetUnfolderBase]: For 2251243/2251249 co-relation queries the response was YES. [2024-06-21 20:57:00,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84486 conditions, 7211 events. 4592/7211 cut-off events. For 2251243/2251249 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 44498 event pairs, 895 based on Foata normal form. 6/7209 useless extension candidates. Maximal degree in co-relation 84232. Up to 6261 conditions per place. [2024-06-21 20:57:00,601 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 613 selfloop transitions, 203 changer transitions 0/820 dead transitions. [2024-06-21 20:57:00,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 820 transitions, 14460 flow [2024-06-21 20:57:00,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:57:00,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:57:00,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 20:57:00,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-21 20:57:00,602 INFO L175 Difference]: Start difference. First operand has 542 places, 791 transitions, 11569 flow. Second operand 10 states and 176 transitions. [2024-06-21 20:57:00,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 820 transitions, 14460 flow Killed by 15